ADC/DAC
製品 (2518)
ADS7816UB/2K5G4 - 12-Bit 200kS/s MicroPower SAR ADC | Texas Instruments
The Texas Instruments ADS7816UB/2K5G4 is a 12-bit, 200 kHz sampling, micro-power, successive-approximation-register (SAR) analog-to-digital converter (ADC) supplied in an 8-pin SOIC (D) package with tape-and-reel packaging (suffix /2K5) and RoHS-compliant lead-free finish (G4). The /2K5G4 ordering code denotes a 2,500-piece reel of the UB-grade (unbuffered, SOIC-8) variant qualified for commercial and industrial -40C to +85C operation, with differential analog inputs and a synchronous serial (SPI/SSI-compatible) digital interface. The device includes an internal 2.5V reference (with +IN/-IN 100mV to VCC input range), automatic power-down between conversions consuming only 3uA, and conversion time of 3.75us. According to the TI datasheet front matter, the part achieves 0.0488% linearity error (max) and supports 0-5V analog input range, making it suitable for data acquisition systems where board space, power, and pin count are constrained. An SAR (successive-approximation-register) ADC is the dominant low-power, medium-speed precision converter architecture used in microcontrollers, industrial sensors, and portable instrumentation. SAR ADCs operate by sequentially testing each bit of the digital output against the analog input using an internal precision DAC and comparator, delivering one conversion per trigger with deterministic latency and excellent DC accuracy. Within TI's converter portfolio, the ADS7816 sits at the low-power/small-package end of the SAR family, trading raw speed for sub-100uW active power and stand-alone (no external reference or buffer required) simplicity. Key differentiators of the ADS7816UB/2K5G4 include its 200 kHz maximum sampling rate (much higher than typical 8-/10-bit micropower ADCs), ultralow 1.5 mW active power consumption, automatic power-down that drops quiescent to 3 uA between conversions, and a true differential analog input stage that rejects common-mode noise in noisy industrial environments. The flexible reference input (REF = +IN to +IN +/- 100mV range) lets the user trade resolution for input range in software, while the synchronous serial interface frees board pins in MCU-equipped designs. Typical applications for the ADS7816UB/2K5G4 include battery-powered handheld instrumentation (digital multimeters, portable medical monitors), isolated industrial sensor front-ends (4-20 mA loop digitization, thermocouple/J- or K-type readouts), and embedded control systems (PLC analog input modules, HVAC controllers) where 12-bit ENOB and 200 kHz throughput exceed requirements and 8-pin SOIC footprint replaces larger 14-/16-pin ADC solutions. The small footprint also makes it attractive for multi-channel systems built from multiple ADS7816s multiplexed to one MCU serial port. When designing with this converter, observe that the analog inputs are pseudo-differential and require DC biasing; the serial clock must remain inactive when CS# is high; and the internal reference must be bypassed with 0.1uF + 10uF ceramic capacitors placed within 5 mm of the REF pin. Decouple AVDD with a separate 0.1uF + 10uF pair routed independently to a single ground star point. This page synthesizes distributor pricing, pinout, drop-in alternatives, and practical design notes that go beyond the datasheet's typical-application page.
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.
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.
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.
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.
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.
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.
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/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.
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.
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.
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.
ADS7861IBRHBRG4 - Dual 12-Bit 500kSPS Simultaneous-Sampling ADC | TI
The Texas Instruments ADS7861IBRHBRG4 is a dual, 500 kSPS, 12-bit, 2+2 channel, simultaneous-sampling analog-to-digital converter (ADC) housed in a 32-pin VQFN (RHB) exposed-pad package. Per-channel throughput of 2 µs and fully-differential input architecture let two signals be digitized at exactly the same instant, eliminating inter-channel skew in three-phase power, vibration, and motor-control signal chains. Internal reference, two sample-and-hold amplifiers, and a serial SPI-compatible interface are integrated, which reduces external part count significantly compared with discrete ADC front-ends. An analog-to-digital converter is a mixed-signal integrated circuit that quantizes a continuous analog waveform into discrete digital codes; simultaneous-sampling ADCs add per-channel track-and-hold amplifiers so all channels capture the input at one common edge, critical for phase-sensitive measurements. Within the broader taxonomy, the ADS7861 sits in the ADC/DAC family, precision-converter sub-class, successive-approximation register (SAR) sub-category, and is qualified for industrial (-40°C to +125°C) ambient operation including automotive temperature grades. Key features of the ADS7861IBRHBRG4 include 12-bit no-missing-codes resolution, ±2 LSB INL (max), dual 2 µs throughput, and four fully-differential inputs arranged as two converter pairs. The serial interface operates in either 2-wire or 3-wire mode, supports daisy-chaining of multiple devices, and is compatible with standard SPI, QSPI, and MICROWIRE framers. A hardware RESET pin and a programmable CONVST trigger simplify timing in deterministic multi-ADC systems. Architecturally, the device uses a charge-redistribution SAR core with input bandwidth exceeding the Nyquist limit, allowing accurate sampling of high-edge transient currents. Low aperture delay and matched internal S/H timing across the two ADCs guarantee channel-to-channel phase alignment within a few nanoseconds, even at full 500 kSPS throughput. Typical applications include three-phase motor-control current and voltage sensing, multi-axis vibration and inertial measurement, simultaneous power-line voltage and current acquisition for power-quality and protective relays, and data-acquisition front-ends requiring per-channel timestamp integrity. Industrial process control loops and digital oscilloscope input stages benefit from the same-skew dual conversion. When designing with the ADS7861, route the analog and digital grounds as a star at the exposed pad, place the 10 µF + 0.1 µF decoupling pair within 3 mm of AVDD, and keep the 50 MHz serial clock traces short and impedance-matched to avoid coupling into the analog front-end. This page aggregates distributor pricing, drop-in package-compatible alternatives, and engineering notes beyond what the manufacturer datasheet alone provides, helping procurement and design engineers evaluate the ADS7861 in context.
ADS7861IRHBRG4 - Dual 500kSPS 12-Bit Simultaneous-Sampling ADC | Texas Instruments
The Texas Instruments ADS7861IRHBRG4 is a dual, 12-bit, 500kSPS analog-to-digital converter (ADC) with four fully differential input channels grouped into two pairs for high-speed, simultaneous signal acquisition. The device integrates two successive-approximation-register (SAR) ADCs with two sample-and-hold amplifiers and is supplied in a 32-pin VQFN (RHB) package with an exposed thermal pad. The fully differential inputs are maintained differential from the sample-and-hold amplifier all the way to the ADC input, preserving common-mode rejection through the signal chain. An ADC (analog-to-digital converter) is a data-conversion integrated circuit that transforms real-world analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. The SAR (successive approximation register) ADC architecture, the hypernym category that includes the ADS7861IRHBRG4, uses an internal binary-search algorithm and a precision DAC to resolve one bit per clock cycle, providing deterministic latency, low power consumption, and excellent DC accuracy. Within the broader taxonomy, the ADS7861IRHBRG4 belongs to the category of simultaneous-sampling ADCs (which sample multiple channels on the same clock edge) used when phase relationships between channels must be preserved. Key features include a maximum 0.0488% linearity error (1 LSB), 1.625 microseconds per-channel conversion time, serial data interface, and an operating temperature range of -40C to +125C. The 500 kSPS per-channel sample rate (1 MSPS aggregate for the dual converter) supports motor-control, multi-axis vibration, and power-line monitoring applications. The integrated reference and tight channel-to-channel matching further simplify board design by reducing the external component count. Typical applications include three-phase motor current sensing, multi-axis inertial measurement, industrial process control, and power-line protection relays. When migrating from a multiplexed ADC to the ADS7861IRHBRG4, designers can capture multiple phases of a motor or power waveform simultaneously, eliminating the inter-channel skew and phase error that plague sequential-sampling architectures. When designing with this device, pay close attention to PCB layout: route differential pairs symmetrically, decouple AVDD/DVDD separately, and bond the exposed pad to a solid ground plane for thermal dissipation. The -G4 suffix in the part number indicates a Pb-free (lead-free) grade with the green RoHS-compliant finish per TI's packaging nomenclature.
ADS7883SBDBVR - 12-Bit 3MSPS Serial SAR ADC | Texas Instruments
The Texas Instruments ADS7883SBDBVR is a 12-bit, 3-MSPS successive-approximation-register (SAR) analog-to-digital converter (ADC) housed in a 6-pin SOT-23 (DBV) package. It operates from a single 2.7 V to 5.5 V analog supply, draws only 2.7 mA typical at 3 MSPS with a 3 V supply, and provides true 12-bit performance and no missing codes across the full operating range. A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm through an internal capacitive DAC and comparator to digitize an analog input one bit per clock cycle. Compared with delta-sigma ADCs, SAR ADCs offer deterministic latency, single-conversion latency (no pipeline delay), and superior behavior for multi-channel multiplexed systems. The SAR architecture sits in the broader hierarchy of ADC architectures alongside flash, sigma-delta, and pipeline converters; within TI's data-converter portfolio, the ADS7883 belongs to the low-power, miniature SAR family targeting space-constrained sensor-interface designs. Key features include a zero-latency conversion (CS-controlled serial interface compatible with SPI, QSPI, MICROWIRE, and most DSP serial ports), an inherent sample-and-hold input, a wide input range of 0 V to VREF (or 0 V to AVDD when using AVDD as reference), and an AVDD-referenced reference input. The SOT-23-6 (DBV) footprint is one of the smallest SAR ADC packages on the market, enabling high-density designs such as portable instrumentation, sensor modules, and optical encoders. The device uses a switched-capacitor architecture with internal clock generation per two that power consumption scales with throughput - at 1 MSPS the supply current drops to roughly 1.5 mA, making it attractive for battery-powered systems. An external serial clock (SCLK) and chip-select (CS) provide glueless processor interfacing, and the SDO output can return to high-impedance when CS is high to allow multi-device SPI bus sharing. Typical applications include optical encoders (angular position sensing), position sensors in industrial automation, portable medical instrumentation (blood-pressure monitors, glucose meters), handheld multimeters, and any space-constrained mixed-signal system requiring 12-bit precision at multi-MSPS throughput. Industrial use cases are well served by the -40 °C to +85 °C operating range of the standard grade. When designing with the ADS7883, place the analog input decoupling capacitor (typically 10 nF to 100 nF in series with the input) and the AVDD bypass capacitor (1 µF) as close to the package as possible. Designers should also verify that the host SPI controller can support the SDO chosen, which is determined by the SCLK chosen, the choice of SCLK fall or rise data launch, and the chosen CS timing relative to the SCLK cycle.
ADS7960SRHBT - 8-Bit 1MSPS 12Ch SAR ADC | Texas Instruments
The Texas Instruments ADS7960SRHBT is an 8-bit, 1-MSPS, 12-channel, single-ended, micro-power, serial interface successive approximation register (SAR) analog-to-digital converter (ADC). It is part of the ADS79xx family, which includes 12-, 10-, and 8-bit pin-compatible multichannel ADCs. The device is available in a 32-pin VQFN (RHB) package with an exposed thermal pad, measuring 5x5 mm. It operates over a temperature range of -40°C to +125°C, making it suitable for industrial and automotive environments. An SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm to convert an analog input signal into a digital representation. It is known for its high speed and low power consumption, making it ideal for applications such as data acquisition, industrial process control, and portable instrumentation. The SAR architecture is widely used in multichannel systems where multiple analog signals need to be digitized sequentially. Key features of the ADS7960SRHBT include a 1-MSPS sampling rate, 12 input channels, and a serial peripheral interface (SPI) for communication with microcontrollers or digital signal processors. The device operates from a single 2.7V to 5.25V power supply, and its micro-power consumption makes it suitable for battery-powered applications. The ADC also features a built-in reference and a programmable gain amplifier, reducing external component count. The ADS7960SRHBT uses a capacitive DAC architecture with a successive approximation register, providing accurate conversion with low power dissipation. The device includes a track-and-hold circuit that samples the analog input, and the conversion result is output serially via the SPI interface. The ADC supports both single-ended and pseudo-differential input configurations, offering flexibility in system design. Typical applications for the ADS7960SRHBT include data acquisition systems, industrial process control, motor control, and portable instrumentation. Its 12-channel input capability allows monitoring of multiple sensors or signals, while the SPI interface simplifies connection to a wide range of microcontrollers. The device is also suitable for battery-powered devices due to its low power consumption. When designing with the ADS7960SRHBT, it is important to provide a clean analog supply and proper decoupling to achieve the specified performance. The reference input should be bypassed with a capacitor, and the analog input signals should be buffered if they have high source impedance. The SPI interface should be operated at the correct clock frequency to ensure accurate data transfer.
ADS800U - 12-Bit 40 MSPS ADC | Texas Instruments
The Texas Instruments ADS800U is a 12-bit, 40 MSPS pipelined analog-to-digital converter with single-ended or differential inputs, internal references, and a 28-pin SOIC (DW) package. It accepts a single +5 V supply and operates from -40 °C to +85 °C. These headline values position it for compact, high-speed industrial digitization where 12-bit resolution is sufficient and deterministic sampling is more important than the lowest power available. An ADC is a data-acquisition IC that samples an analog voltage and converts it to a digital code. The ADS800U belongs to the pipelined ADC hierarchy, where multiple internal stages perform conversion in overlapping cycles. This architecture supports high conversion throughput while separating acquisition, digitization, and digital correction functions. Relative to a slow successive-approximation ADC, it is better suited to waveforms, communications, instrumentation, and control loops that need new samples at tens of millions per second. The ADS800U provides a 40 MSPS conversion rate, 12-bit resolution, single-ended and differential input choices, and internal references. Its wideband track-and-hold capability is listed at 65 MHz, allowing the input stage to acquire rapidly changing signals. The converter consumes 390 mW with its internal reference and operates from one +5 V supply, simplifying system power architecture compared with converters requiring several bias rails. The industrial temperature range supports use across controlled indoor and equipment environments. A pined ADC is not simply a physical pinout distinction. The ADS800U is compatible with the ADS801 and ADS802 family, enabling common-layout designs to scale resolution while preserving the 28-pin SOIC footprint. The interface also benefits from an organized digital output and clock structure typical of parallel converters, although timing, input range, and control logic must be checked against the complete manufacturer datasheet before board release. Typical applications include industrial process monitoring, communications infrastructure, digital oscilloscope and waveform-capture systems, communications receivers, and feedback loops for power conversion or motor control. At 40 MSPS, the converter supports a broad analog bandwidth but does not promise that every downstream signal can be captured without aliasing. Input filtering, anti-alias design, source impedance, and clock jitter remain critical to useful system performance. The main design consideration is ensuring that the analog front end, reference path, clock, and digital interface operate within datasheet limits. Use a low-jitter sampling clock, provide stable bypass capacitance, and route the analog inputs away from fast digital edges. Differential operation can improve noise immunity when the source can drive it, while single-ended operation can simplify system wiring. Both approaches require verified input-voltage and common-mode limits. This product data combines verified manufacturer, distributor, and cross-reference information with application guidance and selection criteria that are not present in the raw listing. It also distinguishes exact drop-in alternatives from packaging-only orderable variants, helping engineers reuse PCBs without mistaking a reel code for an electrically equivalent part.
ADS801U - 12-Bit 25-MSPS ADC | Texas Instruments
Texas Instruments ADS801U is a 12-bit, 25-MSPS monolithic analog-to-digital converter in a 28-pin SOIC (DW) package. It uses a single +5 V supply, accepts single-ended or differential analog inputs, and includes a 12-bit quantizer, wideband track-and-hold circuit, reference circuitry, and three-state outputs. Its low-power CMOS design consumes 270 mW, making it suitable for instrumentation and signal-processing systems that require compact, high-speed parallel data conversion. An ADC is a data-converter category that samples an analog voltage and converts it into a digital code for processing, storage, display, or control. The ADS801U belongs to the parallel-output pipelined ADC family and is positioned between general-purpose mixed-signal processing and high-speed measurement. Its 12-bit resolution provides 4096 quantization levels, while the 25-MSPS sampling rate supports rapidly changing signals when the analog front end and system clock are designed appropriately. Key features include no missing codes, a 65 MHz track-and-hold bandwidth, internal references, single-ended or differential input configuration, and compatibility with ADS800 and ADS802 pin arrangements. The single +5 V supply simplifies system power design, while the three-state outputs support bus-oriented connection to digital logic. The supplied technical data identifies a 54 mA supply current and an industrial temperature grade of -40 °C to +85 °C for the ADS801U package. The converter uses a small-geometry CMOS process and a pipelined conversion architecture. Pipelining supports high throughput by dividing the conversion process into stages, although system designers must account for the device's specified acquisition and conversion timing. The 28-pin SOIC package is intended for surface-mount assembly and includes analog, digital, reference, and control connections. Typical applications include industrial measurement, communications equipment, test and measurement instrumentation, control systems, and embedded signal acquisition. The 25 MSPS rate is useful when sampling waveforms or feedback signals, while 12-bit resolution balances data fidelity against digital interface bandwidth. Differential input support can improve signal integrity when the source is balanced and the PCB layout is controlled. Designers should verify the exact pinout, analog input range, reference configuration, timing, output coding, and package details in the manufacturer datasheet before layout. Keep analog and digital return paths separated, place bypass capacitance near the supply pins, and provide a controlled input source. The SOIC footprint also allows easy breadboard and prototype assembly, although production layouts should minimize parasitic capacitance and digital crosstalk.