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ADS7824P - 12-Bit 4-Channel SAR ADC | Texas Instruments
ADS7824P

ADS7824P - 12-Bit 4-Channel SAR ADC | Texas Instruments

The Texas Instruments ADS7824P is a 12-bit, four-channel, successive-approximation analog-to-digital converter capable of acquiring and converting a differential input within 25 microseconds maximum while consuming no more than 50 mW. It is supplied in a 28-pin 0.3-inch plastic DIP package and supports parallel or serial data output. The device uses a 4-channel input multiplexer, sample-and-hold circuit, clock, reference, and microprocessor interface in one package. An ADC is a data-converter IC that transforms an analog voltage into a digital code for processing, measurement, or control. The ADS7824 belongs to the SAR ADC hierarchy, where a successive-approximation internal converter determines the input voltage one bit at a time. Its four-channel multiplexer makes it suitable for systems that need to monitor several analog signals while sharing one converter and one interface. The principal specifications are 12-bit resolution, a 40 kSPS conversion rate, a maximum sampling and conversion time of 25 microseconds, and a standard industrial differential input range of plus or minus 10 V. Laser-trimmed scaling resistors provide the input range and channel-to-channel matching of plus or minus 0.1%. Maximum INL and DNL are plus or minus 0.5 LSB, while maximum power dissipation is 50 mW. The converter supports a single plus 5 V supply and continuous-conversion operation. Its interface can operate in parallel or serial mode, allowing it to connect to processors with either conventional bus pins or serial data links. The device is also documented as pin-compatible with the 16-bit ADS7825 family, although the different code width changes the resolution represented by each LSB. Typical uses include industrial process measurement, analog sensor interfaces, laboratory instrumentation, data acquisition, and embedded control systems. The four-channel architecture allows multiplexed monitoring of transducers or conditioned signals, while the plus or minus 10 V range can simplify interface design around bipolar industrial sensors. Designers should verify signal polarity, input impedance, reference requirements, interface timing, and acquisition timing before finalizing the analog front end. The ADS7824P is a legacy 28-pin plastic-DIP device, so long-term availability and assembly process compatibility should be confirmed before a new design commits to that footprint. This page consolidates the verified manufacturer specifications, package information, pricing availability status, and practical pin-compatible alternatives. It also highlights the differences between the 12-bit ADS7824 and related family members so engineers can distinguish an exact footprint match from a merely similar converter.

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ADS7824PG4 - 4-Ch 12-Bit 40kSPS SAR ADC | Texas Instruments
ADS7824PG4

ADS7824PG4 - 4-Ch 12-Bit 40kSPS SAR ADC | Texas Instruments

The Texas Instruments ADS7824PG4 is a 4-channel, 12-bit successive-approximation analog-to-digital converter with a maximum 40 kSPS sampling rate, supplied in a 28-pin PDIP (N) through-hole package. It is the Pb-free (G4) variant of the legacy ADS7824 family, integrating a 4-channel input multiplexer, sample-and-hold amplifier, internal clock, internal reference, and both serial and parallel microprocessor interfaces on a single 5 V CMOS die. A successive-approximation register ADC is a comparator-based converter that performs a binary search against the input voltage, one bit per clock cycle, producing a complete 12-bit result in a fixed number of conversion cycles. Within the broader data-converter taxonomy, the ADS7824PG4 sits between precision delta-sigma converters (which trade speed for resolution) and high-speed flash converters (which trade resolution and power for sample rate). SAR ADCs are favored where single-shot deterministic latency, modest resolution, and low power consumption must coexist, as in multiplexed industrial sensor acquisition. Key features include a guaranteed 25 us max acquisition-and-conversion time, 50 mW max power dissipation from a single +5 V supply, ±10 V industrial input range with on-chip laser-trimmed scaling resistors, ±0.5 LSB linearity, ±0.1% channel-to-channel matching, and a 4-channel single-ended or pseudo-differential input mux. The internal 2.5 V reference and clock eliminate the need for external analog support components in most designs. Typical applications include industrial process-control PLCs, multi-loop data acquisition systems, multi-channel instrumentation front-ends, and pin-compatible upgrades for legacy ADS7825 16-bit designs. The wide ±10 V input range allows direct connection to industrial ±10 V transducers and 4-20 mA loop sense resistors without external signal conditioning.

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ADS7824U - 12-Bit 4-Channel SAR ADC | Texas Instruments
ADS7824U

ADS7824U - 12-Bit 4-Channel SAR ADC | Texas Instruments

Texas Instruments ADS7824U is a 12-bit, 4-channel successive-approximation analog-to-digital converter with a maximum sampling and conversion time of 25 µs, a +5 V supply, and a 28-pin SOIC package. The integrated four-channel multiplexer, sample-and-hold circuit, clock, reference, and parallel or serial microprocessor interface make it suitable for compact industrial measurement systems. An ADC is a data-acquisition IC that converts continuously varying analog voltages into digital values for processing, measurement, display, or control. A sampling ADC uses an internal sample-and-hold circuit before conversion, while the SAR architecture progressively resolves the input using a comparator and internal DAC. Within the broader hierarchy of data-converter ICs, the ADS7824U is a multichannel SAR ADC designed for low-power, low-resolution measurement rather than high-speed waveform capture. Key features include conversion to within ±0.5 LSB in 25 µs maximum, laser-trimmed input-scaling resistors, a standard industrial ±10 V input range, and channel-to-channel matching of ±0.1%. Maximum power dissipation is 50 mW, and the device supports a power-down mode with 50 µW power consumption. Both parallel and serial data outputs allow connection to either a parallel microprocessor bus or a serial interface. The four-channel analog multiplexer provides ±10 V bipolar input capability through external circuitry, while the internal reference and conversion system support repeatable measurement. The ADS7824 is also identified as pin-compatible with the 16-bit ADS7825, although the higher-resolution replacement changes code width and corresponding least-significant-bit size and therefore requires system-level verification. Typical applications include industrial process monitoring, laboratory measurement instruments, sensor signal acquisition, multichannel data loggers, and embedded control systems. The 25 µs maximum conversion time supports moderate-rate sampled measurements rather than high-frequency signal analysis. Designers should account for input overvoltage protection, reference stability, source impedance, settling time, digital-interface timing, and the substantial voltage swing present around the ±10 V range. A common layout error is routing high-impedance sensor inputs directly to the multiplexer without adequate protection and filtering. This page consolidates the verified manufacturer and distributor information, practical application guidance, parameter comparisons, and drop-in replacement limitations into design-focused guidance that is not limited to basic distributor catalog data.

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ADS7824UB/1KG4 - 12-Bit 4-Ch 40kSPS SAR ADC | Texas Instruments
ADS7824UB/1KG4

ADS7824UB/1KG4 - 12-Bit 4-Ch 40kSPS SAR ADC | Texas Instruments

The Texas Instruments ADS7824UB/1KG4 is a 12-bit, 4-channel successive-approximation-register (SAR) analog-to-digital converter that acquires and converts 12 bits to within ±0.5 LSB in 25 µs maximum while consuming only 50 mW maximum. It is supplied on tape and reel in 1000-piece increments (the /1KG4 suffix) and is housed in a 28-pin SOIC (DW) wide-body package with a ±10 V industrial input range driven by laser-trimmed scaling resistors. According to the TI ADS7824 datasheet, channel-to-channel matching is specified at ±0.1%, and the device operates from a single +5 V supply. A SAR ADC is a type of data converter that uses a binary-search successive-approximation algorithm against an internal DAC to determine each code. SAR converters sit within the broader hierarchy of analog-to-digital converters (ADC) -> data converters -> signal chain ICs -> mixed-signal semiconductors, and are valued for deterministic latency, no pipeline delay, and excellent DC linearity — making them well suited to multiplexed multi-channel data acquisition systems where the application needs accurate snapshots of slowly varying analog signals. Key features of the ADS7824UB/1KG4 include a 4-channel input multiplexer, an on-chip sample-and-hold amplifier, internal clock, an internal 2.5 V reference, and both parallel and serial microprocessor-compatible data outputs. The converter supports an external reference option, provides unipolar/bipolar input ranges, and is pin-compatible with the 16-bit ADS7825, allowing a single PCB to serve both 12-bit and 16-bit product variants. Maximum integral nonlinearity (INL) and differential nonlinearity (DNL) are specified at ±0.5 LSB each. Architecturally, the ADS7824 uses a charge-redistribution DAC array with thin-film laser-trimmed input scaling resistors, which simultaneously provides the bipolar ±10 V input range and excellent channel-to-channel matching. The internal reference can be overdriven externally for ratio-metric applications, and the SAR core is monotonic by design. Typical applications include industrial process control, multi-channel data acquisition systems, portable instrumentation, and automated test equipment. The wide ±10 V input range and four-channel mux make it ideal for direct connection to industrial sensors and transducer bridges without external signal conditioning. When designing with this device, ensure the input signal does not exceed ±15 V absolute maximum, and add 100 Ω series resistors with 1 nF capacitors on analog inputs to protect against transients while preserving the 25 µs acquisition time.

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ADS7825P - 16-Bit, 4-Channel SAR ADC | Texas Instruments
ADS7825P

ADS7825P - 16-Bit, 4-Channel SAR ADC | Texas Instruments

The Texas Instruments ADS7825P is a 16-bit, four-channel successive-approximation analog-to-digital converter with a 25 microsecond maximum sampling and conversion time, a standard industrial plus or minus 10 V input range, and a 28-pin PDIP package. It operates from a single plus 5 V supply and consumes no more than 50 mW during normal operation. A sampling ADC is a category of data-converter IC that samples an analog input, holds it on an internal sample-and-hold capacitor, and converts the held voltage into a digital code. The ADS7825P belongs to the ADC > data converter > semiconductor hierarchy and combines a four-channel analog multiplexer, sample-and-hold circuit, internal clock, reference circuitry, and parallel or serial microprocessor interface in one package. Key features include 16-bit resolution, four multiplexed input channels, conversion within plus or minus 2.0 LSB, and laser-trimmed input-scaling resistors with channel-to-channel matching of plus or minus 0.1%. The converter supports both parallel and serial data outputs, allowing it to connect to processors with either interface style. A power-down mode reduces consumption to 50 microwatts when conversion performance is not required. The architecture is suited to industrial measurement systems because the plus or minus 10 V input range accepts bipolar sensor signals without requiring a separate front-end amplifier for every channel. Its internal multiplexer reduces the number of analog connections, while the sample-and-hold stage provides a stable input during conversion. The 25 microsecond maximum conversion time supports deterministic control and measurement loops. Typical uses include process-control instrumentation, data acquisition, industrial sensor interfaces, laboratory measurement equipment, and embedded monitoring systems. The parallel interface can accelerate transfers to compatible microprocessors, while the serial interface reduces the number of signal connections when board space is more important than maximum bus throughput. A key design consideration is signal conditioning. Although the ADC accepts plus or minus 10 V, each source must remain within the input range, and external protection may be necessary for transients or sustained overvoltage. Designers should also follow the manufacturer pin-description table, reference configuration, and layout guidance when assigning a complete 28-pin PDIP footprint. This product page consolidates the exact manufacturer and distributor specifications, identifies the limits of cross-brand substitution, and adds practical selection guidance that helps engineers determine whether the ADS7825P fits a new or existing 28-pin measurement design.

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ADS7825PG4 - 16-Bit, 4-Ch, 40kS/s Sampling ADC | Texas Instruments
ADS7825PG4

ADS7825PG4 - 16-Bit, 4-Ch, 40kS/s Sampling ADC | Texas Instruments

The Texas Instruments ADS7825PG4 is a 16-bit, 4-channel successive-approximation register (SAR) analog-to-digital converter with a maximum sampling rate of 40 kS/s, supplied in a 28-pin PDIP (N) package. According to the manufacturer datasheet, the part integrates a 4-channel input multiplexer, sample-and-hold amplifier, internal clock, internal 2.5V reference, and both parallel and serial microprocessor interfaces on a single CMOS die, giving designers a compact data-acquisition front-end with minimal external component count. A successive-approximation ADC is a type of Nyquist-rate converter that uses an internal DAC and a binary-search algorithm to digitize an analog input one bit at a time over a fixed number of conversion cycles. SAR ADCs deliver deterministic latency, low power consumption, and excellent DC accuracy, which makes them a workhorse for industrial process control, multi-channel sensor monitoring, and precision instrumentation where sampling rates below ~1 MSPS are sufficient. Within the power-management and signal-chain hierarchy, the ADS7825PG4 sits between the analog front end (sensor + amplifier) and a microprocessor or DSP, converting real-world analog signals into a format that a digital controller can process. Key specifications include 16-bit resolution with no missing codes, 40 kHz maximum throughput per channel, ±2.5 LSB maximum INL (typical linearity error 0.0046%), and flexible supply rails (analog 4.75V-5.25V, digital 4.75V-5.25V). The device supports single-ended and pseudo-differential inputs across four channels, hardware or software channel selection, and either an external or internal reference. Power dissipation is 50 mW maximum in normal operation, dropping to under 100 µW in power-down mode for battery-aware designs. The architecture combines an R-2R ladder DAC with auto-calibrated thin-film resistors and a precision comparator, achieving low-noise conversion and tight gain matching. The on-chip 2.5V reference is laser-trimmed to within ±5 mV, removing the need for an external ADR03 or REF02 in many designs. CMOS processing and high-impedance CMOS inputs keep the input leakage under 200 pA, making the part tolerant of high-impedance sensor sources. The package_svg_key confirms the 28-DIP 0.300-inch pinout, slot-compatible with the older ADS7824UB family for easy migration. Typical applications include multi-channel industrial process control (4-20 mA loop monitoring via shunt), portable battery-powered data loggers using the internal reference and power-down mode, scanner and digitizer front ends, and four-channel instrumentation front ends in test equipment. With 40 kS/s aggregate throughput, four simultaneous channels at 10 kS/s each can be supported, which is more than adequate for temperature, pressure, and strain-gauge multiplexer arrays. When designing the analog front end, ensure the source impedance stays well below 1 kΩ to avoid gain-error shift caused by the ADC's finite input current during sampling, and place a 100 nF ceramic bypass capacitor within 5 mm of the AVDD pin. Use the digital-interface mode that matches your host MCU/MCU DSP: serial mode for low-pin-count microcontrollers, parallel mode for high-speed DSP read-back.

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ADS7825U - 16-Bit 4-Channel SAR ADC | Texas Instruments
ADS7825U

ADS7825U - 16-Bit 4-Channel SAR ADC | Texas Instruments

The Texas Instruments ADS7825U is a 16-bit, 4-channel sampling successive-approximation analog-to-digital converter with a 25 us maximum conversion time, 40 kSPS throughput, and a 28-pin SOIC (DW) package. It operates from a single +5 V supply, supports an industrial ±10 V input range through laser-trimmed scaling resistors, and provides parallel or serial microprocessor data output. The converter can acquire and convert 16 bits to within ±2.0 LSB while consuming no more than 50 mW. An ADC is an analog-to-digital converter, a semiconductor that converts continuously varying voltage signals into numerical values for processing, measurement, or control. The ADS7825 belongs to the SAR ADC family, where a sample-and-hold circuit captures an input and an internal successive-approximation conversion process determines its digital code. Within the broader hierarchy, it is a data-acquisition IC and interface IC for industrial instrumentation, process control, and embedded measurement systems. The four-input analog multiplexer allows one ADC to service four single-ended input channels. Its ±10 V range removes the need to build external attenuation when measuring bipolar industrial signals, while channel-to-channel matching of ±0.1% improves consistency between measurements. The 16-bit resolution provides 65,536 code levels. Operating from one +5 V supply simplifies system power planning, and the parallel or serial interface supports connection to both legacy parallel buses and modern serial processors. The sampling architecture provides a conversion time of 25 us maximum and supports 40 kSPS operation in the verified product data. A power-down mode reduces consumption to 50 uW, making the converter practical for intermittently sampled equipment. Internal or external reference capability gives designers flexibility in selecting the reference strategy, while parallel and serial outputs provide migration options between microprocessor architectures. The 28-pin SOIC package supports conventional surface-mount assembly. Typical uses include industrial process-control input modules, PLC analog input cards, laboratory data loggers, and factory instrumentation. The ADS7825U is also appropriate for bipolar sensor acquisition where signals exceed the supply rails, provided the analog inputs remain within the specified ±10 V range. For communications or instrumentation front ends, the serial interface can reduce wiring, while the parallel interface can simplify deterministic acquisition in older controller designs. A critical design consideration is preserving the converter's measurement accuracy through careful analog routing. Keep the ±10 V inputs away from high-current switching nodes, provide stable reference and supply bypassing, and respect the input settling time required by the sample-and-hold stage. Verify the actual input range, absolute maximum ratings, and acquisition timing from the manufacturer datasheet before applying signals or changing the reference network. This page consolidates verified manufacturer and distributor information, identifies same-footprint alternatives, compares the ADS7825U with candidate replacements, and adds practical selection and circuit-design guidance. It is intended to help engineers identify whether the 16-bit, four-channel, ±10 V ADC fits a design before downloading the complete ADS7825 datasheet and beginning schematic capture.

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ADS7825UE4 - 16-Bit 4-Ch 40kSPS ADC | Texas Instruments
ADS7825UE4

ADS7825UE4 - 16-Bit 4-Ch 40kSPS ADC | Texas Instruments

The Texas Instruments ADS7825UE4 is a 4-channel, 16-bit, 40 kSPS successive-approximation analog-to-digital converter (ADC) with an integrated 4-channel input multiplexer, sample-and-hold amplifier, internal clock, internal +2.5 V reference, and a configurable parallel or serial microprocessor interface. It is supplied in a 28-pin SOIC (DW) package operating on a single +5 V supply and is specified over the industrial -40C to +85C temperature range. The part consumes only 50 mW maximum during conversion, making it well suited for power-aware multi-channel data-acquisition front-ends. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts a continuous-time, continuous-amplitude analog voltage into a discrete-time, discrete-amplitude digital code. Successive-approximation register (SAR) ADCs use a binary-search algorithm against an internal DAC and comparator, achieving 16-bit resolution with low latency and deterministic throughput. Multi-channel ADCs integrate an analog input multiplexer that sequentially routes one of several inputs to the converter core, allowing a single ADC silicon die to digitize many signals - reducing cost, board area, and channel-to-channel timing skew. The ADS7825UE4 belongs to the broader SAR ADC family within TI's precision data-converter portfolio. Key features include 25 us maximum acquisition-plus-conversion time, +/-2.0 LSB maximum integral nonlinearity, +/-10 V true bipolar input range achieved through laser-trimmed scaling resistors, channel-to-channel matching within +/-0.1%, and a choice of parallel (8/16-bit) or serial data output. The internal 2.5 V reference eliminates an external reference IC in many designs. A continuous-conversion mode allows the device to autonomously cycle through all four input channels without host intervention. The architecture combines a capacitive-charge-redistribution DAC, a low-noise comparator, and an SAR control logic block. The input MUX is followed by a wide-bandwidth track-and-hold, which preserves the 16-bit accuracy even when the internal multiplexer switches between full-scale +/-10 V signals. The internal reference is buffered to drive the DAC ladder directly, reducing dynamic reference current transients. The combined architecture delivers 86 dB typical SNR and is pin-compatible with the lower-resolution ADS7824. Typical applications include multi-channel industrial process control, portable or rack-mounted data-logging systems, medical instrumentation signal acquisition, automated test equipment (ATE) front-ends, and general-purpose precision data-acquisition boards requiring bipolar +/-10 V inputs from sensors or transducers. When designing with this ADC, ensure the input amplifier drive strength and settling time are matched to the 25 us acquisition window, and add anti-alias filtering on each analog input to attenuate out-of-band noise above the Nyquist frequency (20 kHz at 40 kSPS aggregate throughput). This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for selecting, sourcing, and qualifying the ADS7825UE4.

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ADS7832BP - 12-Bit 117kSPS 4-Channel SAR ADC | Texas Instruments
ADS7832BP

ADS7832BP - 12-Bit 117kSPS 4-Channel SAR ADC | Texas Instruments

The Texas Instruments ADS7832BP is a 12-bit, 4-channel successive-approximation (SAR) analog-to-digital converter sampling at 117 kSPS in a 28-pin PDIP (N) through-hole package. It features single +3.3V supply operation, 14 mW typical power dissipation plus a hardware power-down pin, and pin compatibility with the legacy ADC7802 and ADS7803 parts. An SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm implemented with a capacitive charge-redistribution DAC. Compared to delta-sigma and pipeline ADCs, SARs offer deterministic latency (one conversion per start pulse), low power consumption, and excellent DC accuracy - making them the workhorse choice for multiplexed multi-channel data acquisition at moderate speeds (up to a few MSPS) and precision instrumentation. Key specifications include 69 dB minimum signal-to-noise-plus-distortion (SINAD) at f_IN = 1 kHz, 66 dB minimum at f_IN = 50 kHz, 8.5 microsecond conversion time, four single-ended analog input channels, and an autocalibrating architecture that corrects internal gain and offset errors at power-up. The 4-channel input mux allows direct connection of up to four sensors or signal sources without external switching. The ADS7832BP uses a charge-redistribution SAR core with an internal autocalibration routine that calibrates gain and offset on every power-up cycle. The device presents data on a parallel 12-bit interface with standard CS/RD control signals, simplifying connection to legacy microprocessors and DSPs. Internal reference and clock generation reduce external component count. Typical applications include industrial process control, multiplexed data acquisition systems, battery monitoring, portable instrumentation, and upgrade designs for legacy ADC7802/ADS7803 sockets. The hardware power-down pin makes it attractive for battery-powered systems that need to minimize quiescent current between conversions. When designing with this part, ensure the analog inputs remain within 0V to V_REF and that the input bandwidth is properly limited with a low-pass filter to avoid -f_ap aliasing of high-frequency noise into the conversion bandwidth. The PDIP-28 footprint is convenient for prototype and through-hole assembly but limits high-density production designs. This page synthesizes distributor pricing, drop-in alternatives drawn from the Site MPN cross-reference list, and practical design notes not found in the manufacturer datasheet alone.

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ADS7833N 10-Channel 12-Bit Data Acquisition System | Texas Instruments
ADS7833N

ADS7833N 10-Channel 12-Bit Data Acquisition System | Texas Instruments

Texas Instruments ADS7833N is a 10-channel, 12-bit data acquisition system with three simultaneous-sampling channels, synchronized 12-bit ADCs, fully differential multiplexed inputs, digitally selectable input ranges, and a 6.6 us throughput rate in a 68-pin PLCC package. An analog-to-digital converter, or ADC, converts continuous analog voltages into digital values for measurement, control, monitoring, and instrumentation systems. The ADS7833N belongs to the broader data acquisition and signal-processing hierarchy, combining analog input multiplexing, conversion, and digital data handling in one device. Its 10-channel architecture is designed for systems that need several analog signals to be measured in a coordinated acquisition sequence. The device includes three simultaneous-sampled channels and three synchronized 12-bit ADCs according to the manufacturer datasheet summary. Simultaneous sampling is valuable when phase relationships between signals must be preserved, while the remaining channels are handled through the device’s multiplexed input architecture. Digitally selectable input ranges and fully differential inputs support flexible signal conditioning for industrial and scientific instrumentation. The ADS7833N uses ±5 V power supplies and provides serial digital input/output interfaces. These characteristics make it suitable for multichannel measurement systems, process-control equipment, laboratory instrumentation, industrial data loggers, and sensor-interface designs where multiple analog signals must be converted with consistent timing and compact circuitry. The 68-pin PLCC package provides the physical footprint identified for the ADS7833N in the product listing. Engineers should pay close attention to input range, reference accuracy, channel sequencing, sampling time, digital interface timing, and analog grounding when laying out a board. Because the input network is fully differential, source impedance, common-mode voltage, and input filtering must be evaluated together. Use the manufacturer datasheet for the complete pin-description table, recommended application circuit, electrical limits, and timing requirements. This product page combines the ADS7833N core specifications, application guidance, package information, and practical design considerations for engineers evaluating a 10-channel, 12-bit acquisition system.

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ADS7834P - 12-Bit 500 kSPS SAR ADC with 2.5V Reference | Texas Instruments
ADS7834P

ADS7834P - 12-Bit 500 kSPS SAR ADC with 2.5V Reference | Texas Instruments

The Texas Instruments ADS7834P is a 12-bit, 500 kSPS single-channel successive-approximation (SAR) analog-to-digital converter with an internal 2.5 V reference and a synchronous serial interface, packaged in an 8-pin PDIP (through-hole DIP) package. It converts an unipolar analog input from 0 V to the reference voltage into a 12-bit digital word at up to 500,000 conversions per second, with typical power dissipation of only 11 mW at full throughput and 2.5 mW in power-down mode. A SAR ADC is a class of analog-to-digital converter that compares the unknown input voltage against an internal DAC and a comparator, bit by bit, on each clock cycle. Unlike a sigma-delta or pipeline converter, a SAR converter needs no continuous internal oscillator and no oversampling, which makes its behaviour deterministic and its digital output easy to filter in the time domain. In the hierarchy of signal-chain devices, the ADS7834P sits under ADC, then data converter, then signal-chain IC, then semiconductor. Key features of the ADS7834P include 12-bit resolution with a 500 kSPS sampling rate, a fully differential-free unipolar 0 V to VREF input range, an on-chip 2.5 V reference that can be bypassed or used to drive external circuitry, a low-power shutdown mode, and a simple synchronous serial (SPI-compatible) data interface with a chip-select line that holds the output in a high-impedance state. The internal reference eliminates the need for an external reference IC in most designs, reducing board area and cost. The device uses a charge-redistribution DAC array and a comparator-based SAR control loop, so each conversion is a fixed sequence of clock cycles and the acquisition time is deterministic. Because the reference voltage defines the full-scale range, accuracy is directly tied to the reference quality: the 2.5 V internal reference tolerance and temperature drift set the absolute accuracy of every converted code. Because the analog front end is a switched-capacitor network, the source impedance at the AIN pin must be kept low enough for the sampling capacitor to settle within the acquisition window. Typical applications include industrial process monitoring, thermocouple and RTD signal conditioning front ends, battery and power-supply telemetry, portable instrumentation, and low-cost data acquisition systems where a serial interface and through-hole package simplify assembly and prototyping. When designing around the ADS7834P, keep the analog trace from the sensor to the AIN pin short and shield it from digital switching lines, place the reference bypass capacitor close to the REFOUT pin, and treat the analog and digital return currents as separate paths that join only at the device ground pin. If higher resolution is required, more channels are needed, or the design cannot accept a serial interface, a different converter family will be a better fit than this part. This page combines manufacturer specifications, drop-in replacement options, parameter-by-parameter comparisons, and practical PCB and signal-integrity guidance that engineers can apply directly when qualifying the ADS7834P for a new design.

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ADS7835EB/2K5G4 - 12-Bit 500kHz Low-Power SAR ADC | Texas Instruments
ADS7835EB/2K5G4

ADS7835EB/2K5G4 - 12-Bit 500kHz Low-Power SAR ADC | Texas Instruments

The Texas Instruments ADS7835EB/2K5G4 is a 12-bit, high-speed, low-power successive-approximation (SAR) analog-to-digital converter with a 500 kHz throughput rate, internal 2.5 V reference, and synchronous serial interface, housed in an 8-pin MSOP (VSSOP) package supplied on a 2,500-piece tape-and-reel. The part accepts a single +5 V supply, draws only 17.5 mW in normal operation, and drops to 2.5 mW in power-down mode, making it one of the lowest-power 12-bit SAR ADCs in its class for battery-powered and portable designs. The analog input spans -VREF to +VREF (bipolar ±2.5 V around the internal reference), the converter guarantees no-missing-code 12-bit performance, and the digital interface is an SPI/QSPI/MICROWIRE-compatible serial port that supports low-cost galvanic isolation for remote data acquisition. A SAR ADC is a successive-approximation-register analog-to-digital converter - a type of data converter that uses a binary-search algorithm and an internal DAC to digitize an analog input one bit at a time per clock cycle, achieving deterministic latency and excellent DC accuracy without the latency or pipeline delay of pipeline ADCs. The ADS7835 family sits in the hierarchy: SAR ADC -> data converter (ADC) -> signal chain IC -> semiconductor. The internal 2.5 V bandgap reference eliminates an external reference component, and the synchronous serial interface minimizes pin count while supporting high-speed readback to an MCU or DSP. The key differentiating features of the ADS7835EB/2K5G4 versus competing 12-bit 500 kHz SAR ADCs are its 17.5 mW active / 2.5 mW shutdown power budget, an integrated 2.5 V reference (saving a discrete reference IC and ~$0.30 BOM cost), 8-pin MSOP packaging, and TI's long-term manufacturing support for the Burr-Brown™-heritage data-converter line. The "EB" suffix indicates the 8-pin MSOP (VSSOP) package with exposed pad, while the trailing "/2K5G4" indicates 2,500-unit tape-and-reel packaging with a Pb-free / RoHS-compliant finish. The synchronous serial data format and 500 kHz sample rate make the ADS7835EB/2K5G4 well suited to multi-channel data-acquisition systems, optical-module monitoring, and portable instrumentation that require a single +5 V rail, small PCB footprint, and predictable latency. Typical applications include portable multi-channel data loggers, wireless handset battery monitoring, optical-network power monitoring, and spectrum-analyzer IF digitizers where low power and small size are mandatory. When designing with this ADC, place a 0.1 µF ceramic bypass capacitor within 2 mm of the +VD pin, keep analog and digital grounds joined at a single star point beneath the exposed pad, and observe a 100 ns minimum acquisition time by clocking SCLK at or below the 500 kHz / 12-bit envelope. Add a 10 µF tantalum bulk capacitor on the analog supply if the source impedance exceeds 5 Ω to prevent reference droop during conversions.

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ADS7835EQDGKREP - 12-Bit 500kHz Low-Power ADC | Texas Instruments
ADS7835EQDGKREP

ADS7835EQDGKREP - 12-Bit 500kHz Low-Power ADC | Texas Instruments

The Texas Instruments ADS7835EQDGKREP is a 12-bit, high-speed, low-power successive-approximation analog-to-digital converter (SAR ADC) that samples up to 500 kSPS with a single analog input channel, offered in an 8-pin MSOP/TSSOP (DGK) package and qualified to the Enhanced Product (EP) enhanced-reliability program for industrial and harsh-environment use. The part integrates a 2.5 V internal reference, consumes only 17.5 mW of power at full speed, and operates from a single +5 V analog supply. The "EP" suffix designates TI's enhanced-product screening flow, which adds extended temperature performance and controlled baseline for industrial customers. A SAR ADC is a successive-approximation-register analog-to-digital converter - a sub-category of data converters that uses a binary search algorithm and an internal precision DAC to digitize an analog input one bit at a time per clock cycle. SAR ADCs sit within the broader hierarchy of data converters (ADC/DAC) -> signal chain -> analog front-end -> mixed-signal IC. They are valued for zero-latency single-shot conversions, deterministic behavior, and excellent DC accuracy, making them preferred over delta-sigma ADCs when instantaneous sampling and fast response to input transients are required. Key features of the ADS7835EQDGKREP include a 500 kSPS maximum throughput rate, 17.5 mW typical power dissipation, a 2.5 V internal reference with low drift, a pseudo-differential analog input structure that accepts 0 V to VREF input signals, an SPI/QSPI/MICROWIRE-compatible serial data interface, and hardware-configurable unipolar input range. The internal reference eliminates the need for an external reference IC, reducing BOM count and PCB area. The serial interface minimizes I/O pin count, simplifying routing on dense mixed-signal boards. Architecturally, the converter uses a charge-redistribution DAC array controlled by a successive-approximation engine. The input is acquired on an internal sample-and-hold capacitor, then compared bit-by-bit against the reference. The 2.5 V reference is generated by a low-noise bandgap cell; its accuracy directly sets the converter's absolute gain error. The 8-pin MSOP/TSSOP package gives the part a footprint of roughly 3.00 mm x 3.00 mm, ideal for space-constrained applications. Typical applications include industrial process control loop monitoring, portable or battery-powered instrumentation, optical-module monitoring (laser bias current/voltage), high-speed closed-loop servo systems, and general-purpose data acquisition front-ends where 12-bit resolution and 500 kSPS throughput are sufficient. The single-channel architecture with serial output also makes the part a natural fit for multiplexed or multi-channel systems where an external MUX is acceptable. When designing with this device, ensure that the analog input does not exceed the supply rail minus the headroom required by the input ESD structures, and place the supply decoupling capacitor (typically 0.1 uF ceramic in parallel with 10 uF bulk) within a few millimeters of the AVDD pin. The serial clock (DCLK) should be kept low when CS is deasserted to prevent spurious conversions. This page consolidates distributor pricing, drop-in alternatives sourced from the TI ADS78xx family, and practical design notes that go beyond the manufacturer datasheet to accelerate schematic capture and BOM selection.

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ADS7841E - 12-Bit 4-Channel 200 kHz ADC | Texas Instruments
ADS7841E

ADS7841E - 12-Bit 4-Channel 200 kHz ADC | Texas Instruments

The Texas Instruments ADS7841E is a 12-bit, 4-channel, single-ended sampling analog-to-digital converter with a 200 kHz conversion rate and synchronous serial interface, housed in a 16-pin SSOP package. Its resolution is programmable to 8 bits or 12 bits, while its reference voltage can vary from 100 mV to VCC to define the corresponding input range. A sampling ADC is a data-converter category that acquires an analog voltage at discrete intervals and converts it into a digital code. The ADS7841E belongs to the serial-output ADC hierarchy, combining a sample-and-hold input stage with a successive-approximation register and serial interface. This architecture is suited to control systems and embedded products where external host processors read converted samples over a compact serial bus. Four single-ended analog inputs can be selected through the serial interface. Alternatively, the inputs can be configured as two differential channels, allowing a small differential sensor signal to be measured relative to a common reference. The 12-bit resolution provides 4096 code levels, and the manufacturer datasheet states no missing codes with maximum integral nonlinearity and differential nonlinearity of ±1 LSB. The specified SINAD is 72 dB. The ADS7841E operates from a single supply, supports a reference voltage between 100 mV and VCC, and uses a synchronous serial interface for conversion commands and data transfer. Its typical power dissipation is 2 mW at a 200 kHz throughput rate with a +5 V supply. This combination of throughput, interface simplicity, and low typical power is useful when the system must acquire multiple analog measurements without using a high-power parallel ADC. Typical uses include resistive touchscreen controllers, industrial panel interfaces, battery-powered instruments, temperature-sensor acquisition, potentiometer measurements, and embedded analog control loops. A microcontroller can issue channel-selection and conversion commands, then receive the resulting 12-bit code through the serial data line. The ADS7841 is also applicable where two differential inputs provide better rejection of common-mode disturbance than single-ended measurements. Designers should provide suitable input and reference bypassing, use an external reference whose voltage remains within the specified range, and account for the serial interface timing. Because the converter supports both 8-bit and 12-bit operation, firmware and data scaling must match the programmed resolution. Supply and reference noise directly affect conversion accuracy, so layout should minimize traces between the reference source and the device. This product page consolidates the verified manufacturer and distributor information, practical application guidance, package details, and same-footprint alternatives. It also distinguishes documented electrical performance from parameters that require additional design data, helping engineers compare the ADS7841E with other members of the ADS7841 family before committing a PCB footprint.

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ADS7841E/2K5G4 - 12-Bit 4-Ch 200kHz SAR ADC | Texas Instruments
ADS7841E/2K5G4

ADS7841E/2K5G4 - 12-Bit 4-Ch 200kHz SAR ADC | Texas Instruments

The Texas Instruments ADS7841E/2K5G4 is a 12-bit, 4-channel serial-output sampling analog-to-digital converter (ADC) with a successive-approximation register (SAR) architecture, delivered in a 16-pin SSOP (QSOP) package on a 2,500-piece tape-and-reel format. The /2K5G4 suffix designates the G4 lead-free, RoHS-compliant version with tape-and-reel packaging, while the core ADS7841 silicon delivers up to 200 kHz throughput and ±1 LSB max INL/DNL with no missing codes. A successive-approximation register ADC (SAR ADC) is a type of analog-to-digital converter that uses a binary-search algorithm against an internal precision DAC to resolve an analog input to N bits in N clock cycles. SAR ADCs sit in the broader hierarchy of ADC architectures, which also includes delta-sigma, pipeline, flash, and dual-slope converters. Compared to pipeline ADCs they offer lower latency and no pipeline delay, and compared to delta-sigma parts they deliver much higher sampling rates at moderate resolution - making the 12-bit 200 kHz SAR a sweet spot for multiplexed data acquisition, instrumentation, and pen/digitizer front-ends. Key features of the ADS7841E include 4 single-ended or 2 differential input channels, a single +2.7V to +5.25V supply rail, 72 dB SINAD, a synchronous SPI/SSI-compatible serial interface with 8-bit or 12-bit programmable resolution, and typical power dissipation of just 2 mW at 200 kHz throughput on a +5V supply. The reference voltage VREF can be varied between 100 mV and VCC, allowing direct scaling to sensor output spans. An auto-power-down mode reduces consumption between conversions, and the SSOP-16 footprint is pin-compatible with the legacy ADS7841ES and ADS7843 family. The device is specified over the -40°C to +85°C industrial temperature range. Communication is via a 4-wire serial interface (CS, DCLK, DIN, DOUT) plus BUSY, supporting daisy-chaining of multiple ADS7841s on the same bus. A SHDN pin and PD0/PD1 bits implement low-power standby modes between conversions. Internal architecture uses a charge-redistribution DAC with a switched-capacitor comparator, yielding excellent DC linearity and very low aperture uncertainty suitable for touch-screen digitizer applications. Typical applications include 4-wire resistive touch-screen controllers, pen-digitizer digitizing tablets, industrial process-control data acquisition modules, portable battery-powered instrumentation, and general-purpose multiplexed analog input modules for embedded systems. The wide VREF range also makes it suitable for thermocouple and bridge-sensor front-ends. The part is also marketed as an alternate source for the legacy ADS7841ES, easing second-source qualification for existing designs. When designing with the ADS7841E/2K5G4, ensure the VREF decoupling capacitor is placed within 5 mm of the REF pin to avoid conversion errors, and route the BUSY signal away from the analog inputs to prevent digital crosstalk into the sampled value. Note that the ADS7841E/2K5G4 is now marked obsolete by Texas Instruments with no direct replacement; designers should evaluate the active parametric equivalent ADS7841E/2K5 or migrate to the ADS7843/ADS7844 family for new designs. This page synthesizes distributor pricing, drop-in equivalents, and practical design notes that go beyond what is in the manufacturer datasheet, giving engineers a single reference for legacy, current-production, and cross-brand options in the same SSOP-16 footprint.

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ADS7841ES/2K5 - 12-Bit 4-Ch 200kHz SAR ADC | Texas Instruments
ADS7841ES/2K5

ADS7841ES/2K5 - 12-Bit 4-Ch 200kHz SAR ADC | Texas Instruments

The Texas Instruments ADS7841ES/2K5 is a 12-bit, 4-channel serial-output sampling analog-to-digital converter (ADC) housed in a 16-pin SSOP package. It supports up to 200 kHz conversion rate through a successive-approximation register (SAR) architecture, with single-ended or differential input configurations selectable per channel, ±1 LSB maximum INL/DNL, no missing codes, and 72 dB SINAD. A SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary-search algorithm combined with an internal DAC to digitize an input sample in N clock cycles, where N is the resolution in bits. SAR ADCs sit within the broader analog-to-digital converter family (SAR > ADC > data converter > signal chain IC > semiconductor) and are favored over sigma-delta and pipeline architectures when low latency, single-shot conversions, and moderate-to-high sampling rates (tens of kHz to a few MHz) are required in multiplexed-channel applications. Key specifications include 12-bit resolution (programmable to 8 or 12 bits via the MODE pin/bit), 4 single-ended or 2 differential input channels, 3.75 µs typical conversion time, 0.0488 % linearity error, single +2.7 V to +5 V supply operation, and a synchronous serial (SPI-compatible) interface. Typical power dissipation is 2 mW at 200 kHz throughput with a +5 V supply, and the reference voltage VREF can vary between 100 mV and VCC for input scaling flexibility. The ADS7841 implements a four-wire SPI/SSI-compatible synchronous serial interface with a BUSY output, making it straightforward to interface with microcontrollers, DSPs, and modern SoCs. The 16-bit SSOP (DBQ) package is a thin-shrink small-outline outline surface-mount form factor from the SSOP family, providing a compact 5.3 mm body width suitable for space-constrained data-acquisition boards. Typical applications include pen-touch digitizers, battery-monitoring systems, isolated data acquisition, industrial process control, and portable instrumentation. The /2K5 suffix indicates tape-and-reel packaging with 2500-unit reels, oriented toward production-volume assembly. When designing with this part, place the 0.1 µF VCC bypass capacitor as close as possible to the supply pin and route the BUSY and DOUT lines away from noisy switching nodes to preserve the 72 dB SINAD figure at full speed. The MODE pin defaults to 12-bit mode when held LOW, allowing software override when held HIGH. This page consolidates distributor pricing, pin-compatible drop-in alternatives, and practical PCB design notes not found in the standalone manufacturer datasheet, with the goal of accelerating the engineer selection and review process.

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ADS7841P - 12-Bit 4-Channel SAR ADC | Texas Instruments
ADS7841P

ADS7841P - 12-Bit 4-Channel SAR ADC | Texas Instruments

The Texas Instruments ADS7841P is a 12-bit, 4-channel, single-SAR analog-to-digital converter with a synchronous serial interface, a 200 kHz throughput rate, and a 16-pin PDIP package. Its reference voltage can vary from 100 mV to VCC, allowing the input range to scale from 0 V to VREF while the converter operates from a 2.7 V to 5.25 V supply. A sampling analog-to-digital converter samples an analog voltage and converts it into a digital code. The ADS7841 belongs to the SAR ADC category within the broader ADC hierarchy, combining an internal sample-and-hold function, a 12-bit successive-approximation conversion stage, and a serial interface. This architecture is suited to control panels, resistive touch screens, potentiometers, sensors, and other systems that require compact, multiplexed analog measurement. The ADS7841 can operate in 12-bit or programmable 8-bit resolution modes. According to the Texas Instruments ADS7841 datasheet, typical power dissipation is 2 mW at a 200 kHz throughput rate and a 5 V supply. Four analog input channels are selected through the serial interface, reducing the number of external analog multiplexing components required in a multi-sensor design. The flexible reference range also supports systems whose analog signal amplitude is smaller than the supply voltage. The device uses a synchronous serial interface for conversion control and result transfer. Control signals include chip select, serial clock, and serial data input, while converted data is returned through the serial data output. Synchronous operation allows the host processor or controller to establish a defined sampling and conversion sequence, which is important when measurements must repeat at predictable intervals. Typical applications include resistive touchscreen input, industrial control interfaces, portable measurement equipment, sensor conditioning, and embedded systems with several slowly changing analog inputs. The 16-pin PDIP package is appropriate for through-hole prototypes, legacy control boards, and systems where a large lead spacing simplifies manual assembly or connector routing. Designers should verify the analog and digital ground arrangement, route sensitive input traces away from switching nodes, and place input and reference capacitors close to their associated pins. The selected VREF voltage determines the analog input span, while the host firmware must handle channel selection, sampling timing, and the configured 8-bit or 12-bit result format. This product record combines the manufacturer specifications with package, application, sourcing, and design guidance. It also distinguishes verified drop-in alternatives from devices with different packages or interfaces, helping engineers make PCB-level replacement decisions without conflating electrical similarity with physical compatibility.

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ADS7841PBG4 - 12-Bit 4-Ch 200kHz SAR ADC | Texas Instruments
ADS7841PBG4

ADS7841PBG4 - 12-Bit 4-Ch 200kHz SAR ADC | Texas Instruments

The Texas Instruments ADS7841PBG4 is a 12-bit, 4-channel successive-approximation analog-to-digital converter (SAR ADC) with synchronous serial output, packaged in a 16-pin PDIP (through-hole) and rated for industrial -40C to +85C operation. It supports 4 single-ended or 2 differential inputs, delivers up to 200 kHz sampling, and offers pin-programmable 8-bit or 12-bit resolution. Key specifications include +/-1 LSB max INL and DNL, no missing codes, 72 dB SINAD, 2 mW typical power dissipation at 200 kHz throughput, and a 3.75 us conversion time. A SAR ADC is a type of data converter that uses a binary-search successive-approximation algorithm to digitize an analog input in N clock cycles for N bits of resolution. SAR ADCs sit in the broader data-converter hierarchy of analog-to-digital converters, which also include delta-sigma, pipeline, and flash architectures. Within TI's portfolio, SAR ADCs are the workhorse choice for medium-speed (10 kSPS to 1 MSPS), medium-resolution (8 to 16 bit) multiplexed applications where low latency, deterministic throughput, and simple SPI/QSPI/MICROWIRE-compatible serial interfaces are required. Key features of the ADS7841 include single +2.7V to +5.5V supply operation, a software-controlled shutdown mode that drops supply current to under 1 uA, an analog input range of 0V to VREF, and a reference voltage (VREF) that can be varied from 100 mV to VCC. The four analog inputs are selected by a 2-bit address and a 1-bit single-ended/differential control word clocked into the DIN pin, making the part pin-compatible with industry-standard touch-screen controllers of the same era. The 16-PDIP package supports breadboard and through-hole prototyping as well as legacy industrial backplanes. Typical applications include industrial process control, portable data acquisition, isolated sensor front ends, pen/touch input replacement, and battery-powered instrumentation. The wide supply range and 1 uA shutdown current also make the part suitable for power-constrained remote-sensor nodes where the ADC is duty-cycled awake only when a measurement is needed. When designing with the ADS7841PBG4, decouple VCC with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin, and bypass VREF with at least 1 uF of effective capacitance to keep the reference stable across conversions. The serial clock (DCLK) frequency is limited to 2.048 MHz at VCC = 5V (derate to 1.2 MHz at 2.7V) - the host MCU must respect this ceiling for reliable conversions. CS must be brought high after the 24th SCLK to complete the conversion cycle; floating CS mid-frame yields a corrupted sample. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet to help engineers select, source, and integrate the ADS7841PBG4 with confidence.

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ADS7841PG4 - 12-Bit 4-Ch Serial ADC, 200kHz, 16-PDIP | Texas Instruments
ADS7841PG4

ADS7841PG4 - 12-Bit 4-Ch Serial ADC, 200kHz, 16-PDIP | Texas Instruments

The Texas Instruments ADS7841PG4 is a 12-bit, 4-channel, serial-output sampling analog-to-digital converter (ADC) housed in a 16-pin PDIP (N) package with through-hole mounting. The "G4" suffix designates the Pb-free (lead-free) finish variant of the ADS7841 family, and the part is specified over the -40C to +85C industrial temperature range. The converter integrates a successive-approximation register (SAR) architecture with an on-chip sample-and-hold, supports a synchronous serial (SPI/QSPI/MICROWIRE-compatible) interface, and is specified for a 200 kHz throughput rate with a single +5V analog supply and a logic supply down to +2.7V. What is a SAR ADC? A successive-approximation register analog-to-digital converter is a precision data-acquisition IC that uses an internal binary-search algorithm to convert an analog input to a digital code one bit per clock cycle. SAR ADCs are valued for deterministic latency, low power consumption, excellent DC accuracy, and no pipeline delay, making them the workhorse for multiplexed multi-channel data acquisition, industrial process control, and portable instrumentation. The ADS7841PG4 belongs to the data-acquisition ADC category and provides broader data acquisition density in the semiconductor hierarchy. Key features include 4 single-ended or 2 differential input channels, programmable resolution (8 bits or 12 bits), ±1 LSB maximum INL and DNL with no missing codes at 12 bits, 72 dB SINAD, and a low 2 mW typical power dissipation at 200 kHz throughput on a +5V supply. The reference voltage (VREF) is independent and can be varied from 100 mV up to VCC, giving an input voltage range of 0V to VREF. An auto power-down mode reduces dissipation between conversions. Typical applications include pen-touch screen digitizers (the part's original target market), industrial process-control analog front ends, portable battery-powered measurement instruments, multi-channel sensor signal conditioning, and digital multimeter (DMM) front ends. The wide input range and reference flexibility make it well-suited for low-voltage sensor bridges and 4-20 mA current-loop digitization after a shunt resistor. When designing with the ADS7841PG4, place 100 nF decoupling capacitors close to both VCC and VREF, keep analog and digital grounds joined only at one point, and route DCLK, DIN, DOUT, CS, and BUSY traces short and away from noisy digital lines. Use the auto power-down mode (PD1=PD0=0) to keep average current under 1 mA in battery-powered applications.

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ADS7842E - 12-Bit 4-Channel 200 kHz SAR ADC | Texas Instruments
ADS7842E

ADS7842E - 12-Bit 4-Channel 200 kHz SAR ADC | Texas Instruments

The Texas Instruments ADS7842E is a 12-bit, 4-channel, successive-approximation-register analog-to-digital converter with a 200 kHz sampling rate and a 28-pin SSOP package. Its single-supply operating range is 2.7 V to 5 V, and its parallel microprocessor interface uses three-state outputs for direct connection to digital buses. An ADC is a data-conversion device that transforms an analog voltage into a numeric value for processing, measurement, or control. The ADS7842E belongs to the SAR ADC family, where a capacitor-based internal DAC successively approximates the input voltage. Within the broader hierarchy, it is a data-converter IC, an interface IC, and a semiconductor designed for data-acquisition and embedded measurement systems. Key features include four analog inputs through a multiplexer, 12-bit resolution, a 200 kHz conversion rate, and ±1 LSB integral and differential nonlinearity. The converter also provides 72 dB signal-to-noise and distortion ratio and low power dissipation of 2 mW. These characteristics suit precision measurements where four analog signals must be digitized rapidly without employing a high-power switching converter. Internally, the ADS7842E combines a four-channel analog multiplexer, 12-bit capacitor-based SAR converter, sample-and-hold amplifier, microprocessor interface, and parallel three-state output drivers. The tri-state outputs allow the device to share digital bus connections with other peripherals, reducing contention when the processor does not select the converter. The reference voltage is adjustable, supporting analog ranges selected by the system designer. Typical applications include industrial data acquisition, test and measurement equipment, battery-powered instrumentation, and process-control systems. The four-channel input structure reduces the need for multiple converters when several slowly changing sensors must share one digital interface. The 200 kHz sampling capability also supports higher-rate sampled measurements when settling and signal-conditioning requirements are satisfied. The primary design consideration is analog signal conditioning. Inputs must remain within the converter's specified operating range, and the reference, supply, and bypass connections require careful layout. A quiet reference and short analog traces are especially important because gain, noise, and conversion accuracy depend on the complete analog signal chain rather than on resolution alone. This page combines manufacturer specifications, practical application guidance, interface considerations, and structured comparisons with compatible Texas Instruments ordering variants. These engineering details help distinguish the ADS7842E from related converter families and simplify footprint and procurement planning.

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ADS7842E/1KG4 - 12-Bit 4-Ch 200kHz SAR ADC | Texas Instruments
ADS7842E/1KG4

ADS7842E/1KG4 - 12-Bit 4-Ch 200kHz SAR ADC | Texas Instruments

The Texas Instruments ADS7842E/1KG4 is a 12-bit, 4-channel, successive-approximation-register (SAR) analog-to-digital converter that samples at up to 200 kHz and delivers parallel 3-state outputs in a 28-pin SSOP (DB) tape-and-reel package. It integrates a capacitor-based SAR ADC, a sample-and-hold amplifier, a microprocessor-compatible interface, and three-state parallel output drivers. Maximum linearity error is 0.0488% (1 LSB), reference input range is 3 V or 5 V, and power consumption is approximately 2 mW at the rated throughput. The G4 suffix indicates Pb-free, RoHS-compliant assembly on tape and reel. A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that uses a binary-search algorithm against an internal capacitive DAC to resolve one bit per clock cycle. SAR ADCs sit in the broader hierarchy of ADCs (successive approximation, sigma-delta, pipeline, flash), and within mixed-signal data acquisition ICs. SAR converters are favored where low latency, deterministic throughput, and moderate resolution (8-16 bit) matter, such as in multiplexed sensor front ends and process control loops. Key features include a 200 kHz maximum sample rate, 4 single-ended analog input channels with internal multiplexer, 12-bit no-missing-codes resolution, ±1 LSB max INL, ±1 LSB max DNL, and a parallel interface that drops directly onto 8-/16-bit microprocessor data buses. The device accepts a 2.7 V to 5.5 V analog supply and digital supply, supports an external reference, and includes a power-down mode that drops quiescent current to microamp levels for battery-powered designs. Architecturally, the ADS7842 uses a charge-redistribution DAC switched by the SAR logic clocked from the external oscillator applied to the CLK pin. The sample-and-hold front end captures the input on the rising edge of CS, and conversion completes within 16 clock cycles. Parallel 3-state drivers allow the data bus to be shared with other peripherals without external buffers. Typical applications include industrial process control (multi-loop PLC analog front ends), data acquisition systems, multi-channel instrumentation, medical patient monitoring front ends, and battery management analog input aggregation. The 4-channel input count makes the part cost-effective when 2-4 sensors must be read through one ADC. Designers should size the external reference decoupling carefully (typically 10 uF tantalum in parallel with 0.1 uF ceramic) and ensure the CLK pin is driven with a clean 50%-duty-cycle waveform between 0.1 MHz and 2.5 MHz. Avoid routing digital outputs directly beneath the analog input traces to minimize digital-to-analog coupling into the next conversion cycle.

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ADS7843E - 12-Bit Resistive Touch Controller | Texas Instruments
ADS7843E

ADS7843E - 12-Bit Resistive Touch Controller | Texas Instruments

Texas Instruments ADS7843E is a 12-bit sampling analog-to-digital converter with a synchronous serial interface and integrated low-on-resistance switches for driving a four-wire resistive touch screen. It supports conversions up to 125 kHz, operates from a single 2.7 V supply, and typically consumes 750 uW at a 125 kHz throughput rate with a 2.7 V supply. The device is offered in a 16-pin SSOP package. A resistive touchscreen controller is an ADC-and-switch combination that measures voltage ratios from a four-wire touch panel. The ADS7843E belongs to the analog-to-digital converter hierarchy, where the ADC digitizes the touch-panel voltage and the synchronous serial interface transfers conversion results to a host processor. Its ratiometric conversion method allows the reference voltage to vary from 1 V to VCC, producing a corresponding input range from 0 V to VREF. Key features include programmable or 12-bit resolution, two auxiliary analog inputs, a four-wire resistive touch-screen interface, and full power-down control. The 125 kHz conversion capability supports responsive touch sampling while the ratiometric measurement approach helps compensate for supply and reference variations. The 16-pin SSOP format also supports compact, surface-mount touchscreen modules. Internally, the controller combines switched inputs, a sampling ADC, a reference path, and a synchronous serial interface. The low-on-resistance switches reduce the load presented to the touch panel, while the auxiliary inputs let the host monitor additional analog signals through the same converter. Conversion results are transferred through the serial interface, allowing the ADS7843E to operate as a peripheral to a microcontroller or embedded controller. Typical applications include four-wire resistive touchscreen panels in industrial HMIs, portable instruments, test equipment, medical-device interfaces, and compact embedded control panels. The 12-bit resolution supports touch-position calculations across a typical X-Y panel, while the 125 kHz sampling rate can be adapted to the host interface and required response time. When connecting the touch panel, maintain the recommended analog layout and route the touch, reference, and serial signals to minimize interference. Select output data rate, reference voltage, and auxiliary-channel multiplexing in software according to the host sampling rate and control-panel responsiveness. This page combines the manufacturer specifications with practical interface guidance, sourcing paths, and a parameter comparison for engineers evaluating touch-screen controllers. It focuses on the ADS7843E itself rather than treating the different order codes as functionally distinct designs.

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ADS7844E - 12-Bit 8-Channel 200 kHz ADC | Texas Instruments
ADS7844E

ADS7844E - 12-Bit 8-Channel 200 kHz ADC | Texas Instruments

The Texas Instruments ADS7844E is a 12-bit, 8-channel serial-output sampling analog-to-digital converter with a synchronous serial interface, 200 kHz conversion rate, and 20-lead SSOP package. It supports eight single-ended input channels or four differential input channels, while operating from a single supply. Typical power dissipation is 3 mW at a 200 kHz throughput rate with a +5 V supply. A sampling ADC is an analog-to-digital converter that acquires an input voltage through a sample-and-hold circuit and converts it into a digital code. The ADS7844E belongs to the ADC > data converter > integrated circuit hierarchy and is designed for compact embedded systems requiring multiple analog measurements, controlled serial output, and low power consumption. Its reference voltage can vary from 100 mV to VCC, with a corresponding input range of 0 V to VREF. The device provides 12-bit resolution, eight single-ended or four differential inputs, and conversion throughput up to 200 kHz. Its synchronous serial interface supports communication with a microcontroller or other digital controller, while shutdown mode reduces power dissipation when conversion activity is not required. The single-supply operation and selectable reference range make the converter useful in industrial control, instrumentation, data acquisition, and embedded analog monitoring systems. The ADS7844E uses a sampling architecture rather than a continuous-time delta-sigma or pipeline architecture. This supports relatively high throughput for a multiplexed converter while keeping the device suitable for low-power embedded designs. Input selection, reference handling, serial timing, and acquisition control are managed through the device interface and external circuitry. The application engineer must account for the settling time of the sample-and-hold network when multiplexing channels at high conversion rates. Typical applications include touch-panel and resistive input scanning, industrial sensor interfaces, programmable gain control systems, battery-powered instrumentation, and factory automation modules. The 8-channel input arrangement is useful when several analog quantities must be measured with one converter. The 3 mW typical dissipation figure makes the part attractive for embedded systems where overall power budget and board area are constrained. Designers should pay close attention to the reference voltage, analog input range, source impedance, acquisition timing, and serial-interface wiring. Input and reference bypassing, grounding, signal conditioning, and digital return-current management can materially affect conversion accuracy. The 20-lead SSOP package also requires adequate lead clearance and careful assembly planning during manual inspection or rework. This product summary combines manufacturer identification, distributor package information, ADS7844 feature descriptions, and cross-reference findings. It distinguishes verified ADS7844E characteristics from unavailable detailed electrical, pricing, and pin-assignment data so engineers can make a traceable initial selection and then confirm the complete operating limits in the official Texas Instruments datasheet.

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ADS7844N - 12-Bit 8-Channel SAR ADC | Texas Instruments
ADS7844N

ADS7844N - 12-Bit 8-Channel SAR ADC | Texas Instruments

The Texas Instruments ADS7844N is a 12-bit, 8-channel serial-output sampling analog-to-digital converter with a synchronous serial interface and a 200 kHz conversion rate. It supports eight single-ended input channels or four differential input channels, operates from a single supply, and is available in a 20-pin SSOP package. A sampling ADC, or successive-approximation-register ADC, converts an analog voltage into a digital code by sampling an input and comparing it with an internal reference through a sequence of approximations. The ADS7844N belongs to the broader ADC, data-converter, and semiconductor hierarchy, and is designed for applications requiring multiple analog measurements, programmable gain, and serial communication with a microcontroller or embedded control system. Key features include 12-bit resolution, eight selectable channels, single-ended or differential input operation, a 200 kHz conversion rate, and an adjustable reference input that can range from 100 mV to VCC. The input voltage range follows the selected reference voltage, allowing the converter to be scaled for sensors, potentiometers, and low-voltage analog signals. The device also includes shutdown functionality to reduce power dissipation when conversions are not required. The ADS7844N uses a synchronous serial interface with serial data output, clock input, chip select, and differential or single-ended input multiplexing. Its typical power dissipation is 3 mW when operating from a 5 V supply at a 200 kHz throughput rate. The reference voltage can be selected independently of the supply, which helps define the full-scale conversion range and improves flexibility when analog signals occupy only a portion of the converter input range. Typical applications include resistive touch-screen controllers, industrial panel interfaces, portable measurement equipment, battery-powered instruments, data acquisition modules, and embedded control systems. A microcontroller can issue a conversion command, select the analog channel, and receive the resulting 12-bit value over the serial interface. In a touch-panel design, the converter can measure the X and Y voltages while its multiplexer and differential-capable inputs support front-end signal conditioning. When laying out the ADS7844N, keep the analog input traces short, provide a stable reference bypass capacitor, and route serial clock and data traces away from sensitive analog inputs. The 20-pin SSOP package has no exposed pad, so thermal performance depends primarily on the PCB copper area, ambient temperature, and conversion workload. Confirm the complete pin-description table in the manufacturer datasheet before assigning PCB nets. This page combines the official TI product information, the manufacturer ADS7844 data sheet, and cross-reference results to support component identification, comparison, sourcing, and board-level design. It also provides application guidance, pin-package references, and an explicit distinction between confirmed drop-in alternatives and devices that require functional rather than footprint-level review.

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