ADC/DAC
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ADS7817U/2K5G4 - 12-Bit 200kHz Differential Input MicroPower ADC | TI
The Texas Instruments ADS7817U/2K5G4 is a 12-bit, 200 kHz sampling successive-approximation analog-to-digital converter (SAR ADC) with a true differential analog input, automatic power-down, and a high-impedance front end, supplied on a 2,500-piece tape-and-reel. The /U suffix identifies the 8-pin SOIC (D) package, while /2K5G4 denotes the 2.5 k reel quantity and RoHS-compliant Pb-free matte-tin lead finish. An SAR ADC is a successive-approximation-register analog-to-digital converter - a type of data converter that uses a binary search through an internal DAC to determine each digital code in N clock cycles. SAR ADCs sit under the broader hypernyms of data converter -> ADC -> precision converter -> integrated circuit, and are valued for their deterministic latency, single-shot accuracy, and zero-pipeline-delay behavior, which makes them the dominant architecture for multiplexed multi-channel data acquisition systems and motor-control feedback loops. The ADS7817 family is specified for bipolar differential input ranges and a fully-differential sample-and-hold front end, with a programmable reference from 100 mV to 2.5 V that scales the input-referred LSB size between 49 uV and 1.22 mV. Its micro-power operating current and sub-3 uA power-down current suit battery-instrumentation, transducer bridges, and portable sensor signal chains where energy budget dominates the BOM. The ADS7817 achieves 200 kHz throughput while consuming micro-power during conversion, then automatically powers down between conversions. Internal architecture includes a charge-redistribution capacitive DAC, a high-bandwidth differential input amplifier, and an SAR control core clocked from an external serial clock; the SPI-/QSPI-/MICROWIRE-compatible serial interface packs 12-bit results into a compact frame. Typical applications include battery-powered instrumentation, industrial process control loops, portable medical monitors, sensor-signal digitization for strain gauges and thermocouples, and general-purpose data acquisition front-ends. The differential input is particularly attractive where common-mode noise from motor inverters or long sensor cables would saturate a single-ended ADC. When designing with the ADS7817, place the reference decoupling capacitor close to the REF pin and keep the analog and digital grounds joined at a single point near the converter's GND pin to preserve differential-input linearity. Note that the /U SOIC-8 (D) and /E MSOP-8 packages share the same pinout but differ in thermal mass - choose /E only when board area is more critical than dissipation. This page synthesizes distributor stock, parametric drop-in equivalents in the SOIC-8 footprint, and design considerations that the manufacturer datasheet alone does not aggregate, helping engineers evaluate ADS7817U/2K5G4 for both new designs and legacy replacements.
ADS7817UBG4 - 12-Bit 200kHz Differential Input SAR ADC | Texas Instruments
The Texas Instruments ADS7817UBG4 is a 12-bit, 200 kHz successive-approximation register (SAR) analog-to-digital converter (ADC) with a true differential analog input and an 8-pin SOIC package. It operates from a single 5 V analog supply, accepts bipolar differential inputs of +/-2.5 V, and offers a software-controllable automatic power-down mode that drops quiescent current to under 1 mA between conversions. The reference voltage is externally programmable from 100 mV to 2.5 V, which translates to a per-LSB resolution between 49 uV and 1.22 mV. What is a SAR ADC and where does the ADS7817UBG4 fit in the signal chain? A SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary-search algorithm against a sample-and-hold input. It is a sub-type of Nyquist-rate ADC, sitting under the broader ADC family within data-converter ICs and, ultimately, signal-chain semiconductors. SAR ADCs are valued for deterministic latency, dc accuracy, low power, and ease of driving - making them the preferred choice for multiplexed data-acquisition, sensor readout, and instrumentation front ends. Key specifications of the ADS7817UBG4 include 12-bit resolution, 200 kSamples/s maximum throughput, true differential bipolar input range, an input-referred noise floor near 49 uV rms at the smallest reference setting, automatic power-down between conversions, and a synchronous serial (SPI/SSI-compatible) interface. The differential input rejects common-mode noise and ground-loop offsets that plague single-ended ADCs in industrial environments. Architecturally the device pairs a high-impedance differential input stage with a capacitive charge-distribution SAR core, an external reference, and a serial state machine that supports 24-bit transfer framing so a host microcontroller can clock out the conversion result and the channel ID with a single CS edge. Compared with integrating or sigma-delta converters of similar throughput, the ADS7817UBG4 delivers higher speed, true differential input, and lower power in a smaller footprint. Typical applications include portable and battery-powered instrumentation, multi-channel sensor data acquisition, weigh scales, panel meters, industrial process controls, and remote or isolated data loggers. Designers choose the ADS7817UBG4 when they need accurate differential measurement from bridge sensors or thermocouples without paying for a sigma-delta's oversampling latency. A design tip: place the external reference bypass capacitor (typically 10 uF ceramic in parallel with 0.1 uF) within 5 mm of the REF pin, and route the differential analog traces symmetrically. The automatic power-down feature can cut average supply current to under 200 uA in 1 kHz applications, but only if the host controller toggles CNVST at a controlled cadence. This page synthesizes distributor stock, authoritative TI datasheet parameters, drop-in alternatives from the same SAR family, and practical layout guidance - engineering context you will not find on a single distributor listing.
ADS7817UG4 - 12-Bit 200kSPS Differential ADC | Texas Instruments
The Texas Instruments ADS7817UG4 is a 12-bit, 200 kSPS successive-approximation analog-to-digital converter (SAR ADC) with a high-impedance fully differential analog input, housed in an 8-pin SOIC (D) package. Key headline specifications include 12-bit resolution, 200 kSamples/s sampling rate, and a true differential bipolar input range of -2.5 V to +2.5 V, with the reference voltage independently adjustable from 100 mV to 2.5 V for input-referred resolutions between 49 uV and 1.22 mV. The G4 suffix denotes a Pb-free green assembly revision. A SAR ADC is a successive-approximation-register analog-to-digital converter: it uses an internal DAC, a comparator, and a SAR logic block to perform a binary search against the input voltage, producing a digital output word in one conversion cycle. SAR ADCs sit in the broader hierarchy of analog-to-digital converters -> data converters -> mixed-signal ICs, offering an attractive middle ground between slow but precise delta-sigma ADCs and fast but power-hungry flash ADCs. The ADS7817UG4 specifically targets low-power, high-impedance, differential applications such as sensor signal chains and instrumentation front ends. Differentiating features of the ADS7817UG4 include true differential input (rejecting common-mode noise in industrial environments), an automatic power-down mode that drops supply current between conversions, a serial (SPI/QSPI/MICROWIRE-compatible) interface, and 4.75 V to 5.25 V single-supply operation. Power dissipation is approximately 1.8 mW at 200 kSPS and falls to microwatt levels during power-down, making the part well suited to battery-powered or energy-harvesting data acquisition systems. Architecturally, the device uses a charge-redistribution switched-capacitor DAC with a sample-and-hold front end, allowing direct connection to high-impedance sources without external buffering. The internal conversion clock is generated on-chip, so the only external clock needed is the serial interface clock. The differential input structure inherently rejects common-mode noise and is particularly useful when digitizing bridge sensors, thermocouples, or shunt currents in noisy industrial environments. Typical applications include portable instrumentation, industrial process control loops, weigh scales, thermocouple and RTD front ends, battery monitoring systems, and isolated data acquisition modules. The wide input range and adjustable reference also make it a strong fit for transducer signal conditioning where dynamic range must be matched to the sensor output. When designing with this ADC, pay attention to the reference bypass network and analog input common-mode voltage; place a 10 uF tantalum and 0.1 uF ceramic on REF and follow the recommended layout in the datasheet typical-application schematic. Use the CS/FSYNC pin for framing conversions and avoid driving AINP and AINN outside the input common-mode range, which can introduce distortion. This page synthesizes distributor pricing, drop-in alternatives in the SOIC-8 footprint, and practical design notes that complement (but do not replace) the manufacturer datasheet.
ADS7819U - 12-Bit 800 kSPS SAR ADC | Texas Instruments
The Texas Instruments ADS7819U is a 12-bit, 800 kSPS sampling successive-approximation analog-to-digital converter with a parallel microprocessor interface, housed in a 28-pin SOIC package. It uses a ±2.5 V standard analog input range and includes an internal reference, clock, sample-and-hold circuitry, and three-state output drivers. The converter has a 1.25 µs throughput time, making it suitable for high-speed signal acquisition and industrial control systems. An ADC is a semiconductor that converts an analog voltage into a digital code for processing, measurement, or control. The ADS7819U belongs to the successive-approximation ADC, data-converter, and analog-to-digital converter hierarchy. Its parallel output can connect directly to suitable microprocessor or digital logic circuitry, while the internal sample-and-hold function supports acquisition of rapidly changing input signals. Key features include 12-bit resolution, an 800 kSPS sampling rate, a ±2.5 V input range, and a 1.25 µs throughput time. The device also provides an internal reference and parallel data outputs with latches. The industrial temperature grade supports operation from -40 °C to +85 °C. These characteristics balance conversion speed, digital interface simplicity, and analog measurement capability for embedded acquisition systems. The converter uses a capacitor-based SAR conversion structure with an inherent sample-and-hold input stage. A complete conversion sequence requires the converter to compare the sampled input against an internal successive-approximation DAC and test successive bit weights. The resulting 12-bit code is presented through parallel outputs, and three-state drivers allow the output bus to be disabled when shared by multiple converters or interface resources. Typical applications include industrial process control, instrumentation, waveform capture, data acquisition systems, and microprocessor-controlled measurement equipment. In these systems, the ADS7819U can sample an analog sensor or conditioned signal and provide a 12-bit digital representation to a controller. Designers should account for the analog input range, source impedance, acquisition timing, reference behavior, and digital signal timing when completing the surrounding circuitry. For layout, place input, reference, and decoupling connections close to the device and follow the pin-description table in the manufacturer datasheet when assigning PCB tracks. The parallel interface requires careful routing to avoid timing skew, especially when converter outputs feed a higher-speed processor or shared bus. The 28-pin SOIC outline also allows assembly methods commonly used for industrial and instrumentation equipment. This page combines the ADS7819U specifications, packaging information, comparison considerations, and practical implementation guidance for engineers evaluating high-speed parallel-interface ADCs.
ADS7822P - 12-Bit 200kSPS MicroPower ADC | Texas Instruments
Texas Instruments ADS7822P is a 12-bit sampling analog-to-digital converter with a 200 kSPS maximum sampling rate, one analog input, and a 2.7 V to 5.25 V supply range. The device uses successive-approximation conversion and is offered in an 8-pin PDIP through-hole package for industrial-grade applications. A sampling ADC is an analog-to-digital converter that captures a discrete sample of an input voltage and converts it into a digital code. ADS7822P belongs to the successive-approximation ADC, or SAR ADC, family within the broader ADC, data-converter, and semiconductor hierarchies. Its compact 8-pin package and low operating power make it useful where analog measurement must be added to a control, monitoring, or embedded system without introducing a high-speed, high-power converter. The 12-bit resolution provides 4096 discrete code levels for the converter’s full input range. A 200 kSPS sampling capability supports fast-changing analog signals and periodic acquisition in industrial monitoring, sensor measurement, and embedded control. Operation from 2.7 V to 5.25 V permits use with both common low-voltage supply systems and 5 V analog circuits. The manufacturer describes the ADS7822 family as requiring very little power even while operating at the full 200 kHz rate. The ADS7822P uses a sampling architecture and a serial interface for transferring converted results to a digital controller. Sampling, conversion, and serial communication can be coordinated to balance acquisition speed against system timing requirements. Because the exact conversion time, input impedance, reference arrangement, and interface timing are not stated in the available product summaries, designers should use the pin-description table, timing diagrams, and recommended operating conditions in the manufacturer datasheet when defining clocks, sampling intervals, and acquisition circuitry. Typical applications include industrial sensor interfaces, process-control measurements, portable instrumentation, data acquisition modules, and embedded control systems. The 200 kSPS rate is suitable for continuous monitoring of slowly varying process signals as well as periodic capture of faster waveforms. The 2.7 V to 5.25 V operating range also simplifies designs that must operate across 3.3 V and 5 V system rails. The principal design consideration is ensuring that the analog input, supply, grounding, and digital interface are connected exactly as specified. Keep the analog signal path compact, place input filtering and bypass capacitance close to the device pins, and route serial signals away from sensitive analog traces. Confirm acquisition timing and reference configuration against the manufacturer datasheet before fixing the system sampling rate. This page combines the verified device identity, electrical limits, package information, replacement analysis, and practical integration guidance. It also identifies the important boundary between confirmed drop-in interchangeability and devices that may perform a similar function but do not establish pin-to-pin compatibility, helping engineers compare alternatives without overlooking footprint, interface, or acquisition-timing differences.
ADS7822PBG4 - 12-Bit 200kSPS Micro-Power SAR ADC | Texas Instruments
The Texas Instruments ADS7822PBG4 is a 12-bit, 200 kSPS successive-approximation-register (SAR) analog-to-digital converter housed in an 8-pin PDIP (PB) through-hole package, with a 2.7V to 5.25V single-supply operating range. The part is specified over the industrial -40C to +85C temperature range and draws only microwatts of power even at the full 200 kHz conversion rate, making it well suited for battery-powered and always-on data-acquisition front ends. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data converter that resolves an input voltage using a binary-search algorithm against an internal capacitive DAC. Compared with flash ADCs (fast but power-hungry) and delta-sigma ADCs (high resolution but low bandwidth), SAR ADCs offer a balance of moderate speed (up to a few MSPS), low latency (single-cycle conversion), and 8 to 18 bits of resolution, which is why they dominate multiplexed industrial, instrumentation, and process-control signal chains. Key features of the ADS7822PBG4 include a single-ended analog input, an external reference (VREF) pin, a synchronous serial (SPI/QSPI/Microwire) interface, and an SCLK clock input. The PBG4 suffix denotes the Pb-free (RoHS-compliant) green version of the standard 8-PDIP. Designers can sample at full throughput while consuming roughly 1.5 mW at 3V, and power scales linearly with throughput, dropping to microwatts in shutdown. Architecturally, the ADS7822 uses a charge-redistribution CDAC and an inherent sample-and-hold on the input, eliminating the need for an external buffer in many cases. The serial interface is straightforward: CS, SCLK, and DOUT, with the MSB clocked out on the first falling edge. The reference input is ratiometric to VDD, which simplifies system design when ratiometric transducers such as bridge sensors are used. Typical applications include portable instrumentation, pen-tablet digitizers, isolated 4-20 mA loop digitizers, multi-channel multiplexed data-acquisition cards, and battery monitoring in handheld medical or industrial sensors. Its small 8-PDIP footprint and low power also make it attractive for retrofits of legacy through-hole designs. Design considerations: keep the analog input traces short and guarded, bypass VREF with a low-ESR 10 uF (tantalum) plus 0.1 uF ceramic combination, and hold CS low for the full conversion to avoid digital feedthrough. The ADS7822PBG4 requires an external clock; verify SCLK is clean and the controller's SPI mode matches the datasheet timing diagram. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design guidance that is not available on the manufacturer datasheet alone.
ADS7822PG4 - 12-Bit 200kSPS Micropower ADC | Texas Instruments
The Texas Instruments ADS7822PG4 is a 12-bit, 200 kSPS micropower sampling analog-to-digital converter (ADC) with ensured specifications across a 2.7 V to 5.25 V supply range, housed in an 8-pin PDIP (P) package. It features a successive-approximation-register (SAR) architecture, one single-ended input channel, and very low power dissipation that allows full 200 kHz throughput even in power-constrained designs. An SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm against a precision DAC and comparator to resolve each input sample in N clock cycles. SAR ADCs are prized for their deterministic latency (no pipeline delay), excellent DC accuracy, and inherently low noise floor at moderate sample rates. The ADS7822 sits within the broader taxonomy of data converters -> ADCs -> SAR ADCs -> precision/low-power SAR ADCs, serving applications that demand a clean, accurate single-shot conversion without the overhead of a complex digital interface. Key features include 12-bit resolution with no missing codes, a single 2.7 V to 5.25 V analog supply, a synchronous serial (SPI/QSPI/MICROWIRE-compatible) digital interface, an analog input range of 0 V to VREF (or 0 V to VDD with internal reference), and an internal 2.5 V reference option. Power consumption is typically 1.6 mW at 200 kSPS with a 5 V supply, and the part automatically powers down between conversions for energy-efficient duty-cycled operation. Architecturally, the converter combines a capacitive-charge-distribution DAC, a high-bandwidth comparator, a SAR, and an on-chip reference. The internal clock does not require an external oscillator, simplifying PCB routing. The 8-pin PDIP package is pin-compatible with legacy through-hole designs and is also available in SOIC-8 and MSOP-8 versions of the same silicon, allowing easy migration between through-hole and surface-mount assemblies without re-layout. Typical applications include portable instrumentation, battery-powered data loggers, isolated sensor front ends, pen-digitizers and touch-screen controllers, point-of-sale terminals, and general-purpose analog signal conditioning in microcontroller-based systems. The wide supply range and micropower operation make it a strong fit for any 3.3 V or 5 V mixed-signal design. When designing with this device, ensure the analog input source drives a low-impedance buffer to avoid ADC drive-induced gain errors, and decouple AVDD with a 10 µF tantalum plus 0.1 µF ceramic combination placed within 5 mm of the supply pin. The serial interface is straightforward but requires precise SCLK timing - review TI's timing diagrams before connecting it to a microcontroller. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes that complement the manufacturer datasheet, helping engineers select and qualify the ADS7822PG4 quickly.
ADS7822U - 12-Bit 200kSPS Micro-Power ADC | TI
Texas Instruments ADS7822U is a 12-bit, 200kSPS sampling analog-to-digital converter with a 2.7V to 5.25V supply range, one analog input, and an 8-pin SOIC package. Its micro-power design supports low-consumption instrumentation while providing the throughput required for precision sensor, control, and measurement applications. A sampling ADC is a data-converter category that acquires an analog voltage through successive approximation and converts it into a digital value. In the product hierarchy, the ADS7822U is a sampling ADC, which is a type of ADC and a semiconductor interface device used to bridge physical analog signals and digital processing systems. The principal specifications are 12-bit conversion resolution, a maximum sampling rate of 200kSPS, and operation from 2.7V to 5.25V. The converter also features a low-power shutdown state with a maximum power-down current of 3µA. These characteristics make the device suitable for portable measurement systems, industrial controls, and embedded equipment that must balance conversion speed, resolution, and energy use. The ADS7822 uses a serial interface to exchange conversion commands and digital results with a host microcontroller or processor. Its single-input architecture keeps the interface and board requirements compact. Because it is a sampling converter rather than a continuous-time converter, acquisition timing, source settling, reference stability, and digital-interface timing remain important parts of achieving accurate results at high conversion rates. Typical applications include industrial pressure and temperature monitoring, laboratory sensor acquisition, programmable test equipment, and low-power embedded data logging. The 8-pin SOIC package is straightforward to assemble on conventional through-hole-style PCB land patterns and is smaller than many higher-channel-count mixed-signal systems. The 200kSPS rate provides practical margin for monitoring signals that do not require continuous waveform capture. Designers should verify the analog input range against the selected reference voltage, allow the source and front end to settle before conversion, and place bypass capacitors close to the supply pins. A clean reference and appropriately shielded analog layout are equally important because they directly influence the stability and repeatability of the 12-bit conversion result. This page consolidates verified manufacturer and distributor information, technical design guidance, application suitability, and same-package replacement candidates. It also identifies parameters for which the supplied source material does not provide sufficient detail, allowing engineers to distinguish documented facts from data that still requires datasheet confirmation.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.