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ADS7806PBG4 - 12-Bit 40kSPS SAR ADC, 28-PDIP | Texas Instruments
ADS7806PBG4

ADS7806PBG4 - 12-Bit 40kSPS SAR ADC, 28-PDIP | Texas Instruments

The Texas Instruments ADS7806PBG4 is a low-power, 12-bit successive-approximation-register (SAR) analog-to-digital converter delivering up to 40 kSPS sampling rate with single 5V supply operation, packaged in a 28-pin Plastic DIP (0.300 inch, 7.62 mm) with through-hole mounting. According to the manufacturer datasheet, it accepts input ranges of +/-10V, 0V to +5V, and 0V to +4V, integrates a sample-and-hold amplifier, and supports both serial and parallel data interfaces for flexible MCU/DSP connectivity. Key specifications include maximum +/-1/2 LSB integral and differential nonlinearity, 72 dB minimum SINAD at 1 kHz input, and 35 mW maximum power dissipation with a 50 uW power-down mode. The architecture is CMOS SAR with internal or external reference, ensuring compatibility with bipolar industrial signals while operating from a unipolar 5V rail via front-end scaling. Typical applications include industrial process control data acquisition, multi-channel PLC analog input modules, portable instrumentation with battery power management, and precision sensor signal conditioning. The wide +/-10V input range also supports legacy transducer signal chains without external amplification. When designing with this device, ensure the analog input is properly buffered to avoid driving the switched-capacitor input directly. Decouple VDD with 10 uF + 0.1 uF capacitors placed within 5 mm of the supply pins.

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ADS7806PG4 - 12-Bit 40kSPS SAR ADC, Bipolar Inputs | Texas Instruments
ADS7806PG4

ADS7806PG4 - 12-Bit 40kSPS SAR ADC, Bipolar Inputs | Texas Instruments

The Texas Instruments ADS7806PG4 is a low-power, 12-bit, sampling Analog-to-Digital Converter that uses state-of-the-art CMOS structures to deliver 40 kSPS throughput in a 28-pin PDIP (N) through-hole package. According to the TI datasheet, the device integrates a complete 12-bit capacitor-based Successive Approximation Register (SAR) converter with sample-and-hold, an internal clock, an internal reference, and a microprocessor interface providing both parallel and serial output drivers. The 'G4' suffix indicates a Pb-free, RoHS-compliant tape-and-reel packaging option ordered under TI's standard catalog ordering system. An SAR Analog-to-Digital Converter is a type of data converter that uses an iterative binary-search algorithm against an internal capacitive ladder to determine the digital representation of an analog input voltage. Within the broader component hierarchy, an SAR ADC sits between high-resolution (but slow) delta-sigma converters and high-speed (but lower-resolution) flash converters, making it ideal for general-purpose industrial signal acquisition. The ADS7806 specifically targets bipolar-input data acquisition systems that require both true-bipolar measurement and low power consumption (35 mW typical, 50 µW in power-down mode). Key specifications from the verified datasheet include ±10 V and 0 V to 5 V true bipolar input ranges, 25 µs maximum acquisition-and-conversion time, ±½ LSB maximum integral and differential nonlinearity, and 72 dB minimum SINAD with a 1 kHz input signal. The converter operates from a single +5 V analog supply, with separate AVdd and DVdd pins for noise isolation. The parallel + serial output interface (configurable via the BYTE/SEQ pin) lets the host processor trade bus width for board real estate. Architecturally, the ADS7806 uses a charge-redistribution DAC array that inherently performs the sample-and-hold function during the acquisition phase, eliminating the need for an external input buffer. The internal 2.5 V reference is laser-trimmed and buffered, ensuring 12-bit performance without external reference components. Combined with the input protection network (±25 V tolerant at the analog input pin), the device provides robust signal-chain performance in industrial environments. Typical applications include multi-channel industrial process control, instrumentation and data-acquisition front ends, portable or battery-operated measurement systems, and test equipment requiring true bipolar input ranges. The combination of low power dissipation, internal reference, and flexible interface makes the ADS7806 well-suited for embedded industrial designs. When designing with this device, observe the analog/digital supply decoupling guidelines from the datasheet (10 µF and 0.1 µF capacitors at AVdd and DVdd) and respect the 25 µs acquisition timing budget to avoid conversion errors. The "PG4" package code indicates a Pb-free 28-pin PDIP (N) with Tube packaging; distributors ship the device in anti-static tubes, and the cross-reference note "Replaced by ADS8506" indicates TI's recommended migration path for new designs. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single decision-ready view of the ADS7806PG4.

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ADS7806U/1K - 12-Bit 40kHz SAR ADC, Parallel/Serial, SOIC-28 | TI
ADS7806U/1K

ADS7806U/1K - 12-Bit 40kHz SAR ADC, Parallel/Serial, SOIC-28 | TI

The Texas Instruments ADS7806U/1K is a low-power, 12-bit, sampling CMOS Analog-to-Digital Converter using a successive-approximation architecture. It supports up to 40 kS/s throughput with a 25 us max acquisition-plus-conversion time, and is housed in a 28-pin SOIC package. An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that quantizes a continuous analog voltage into a discrete digital code. SAR (Successive-Approximation Register) ADCs convert one bit per clock cycle by comparing the input against an internal DAC, making them well suited for medium-speed, medium-resolution data acquisition. The ADS7806 sits in the SAR ADC family -> data acquisition ICs -> mixed-signal ICs -> integrated circuits, offering both parallel and serial data output interfaces. Key features include 35 mW maximum power dissipation, a 50 uW power-down mode for battery-friendly operation, +/-1/2 LSB maximum INL and DNL, and 72 dB minimum SINAD at 1 kHz input. The input range spans 0V to +5V (with software configuration to +/-5V and +/-4V), and the device operates from a single +5V supply. The combination of low power, parallel+serial interface, and single-supply operation makes it a flexible drop-in for embedded data acquisition. The architecture uses a capacitive-charge-distribution DAC with a sample-and-hold front end and an on-chip clock. The conversion is initiated by a CONVST pulse, and the result is available on either the parallel DB0-DB11 bus or a SPI-compatible serial port with internal/external clock option. Hardware byte-select pins let the host read high and low bytes sequentially on the parallel bus. Typical applications include industrial process control, portable instrumentation, data acquisition systems, and battery-powered sensor digitizers. The 50 uW power-down current is critical for handheld medical or field instruments where the ADC is idle most of the time. When designing with this device, ensure the input is within the source-impedance budget specified in the manufacturer datasheet to avoid conversion-time violations; the S/H front end must be fully settled in 25 us. Use a clean +5V analog supply with adequate decoupling, and route digital outputs away from the analog input traces to limit digital feedthrough. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement the manufacturer datasheet and distributor listings.

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ADS7806U/1KE4 - 12-Bit 40kSPS SAR ADC | Texas Instruments
ADS7806U/1KE4

ADS7806U/1KE4 - 12-Bit 40kSPS SAR ADC | Texas Instruments

The Texas Instruments ADS7806U/1KE4 is a 12-bit, 40 kSPS, single-supply, low-power successive-approximation-register (SAR) analog-to-digital converter housed in a 28-pin SOIC package, designed for industrial-temperature (-40C to +85C) operation. It accepts single-ended input ranges of +/-10 V, 0 V to +5 V, and 0 V to +4 V via pin-strapping, drawing only 35 mW during active conversion and dropping to 50 uW in power-down mode. The device supports both serial and parallel data output, internal or external reference, and delivers 72 dB minimum SINAD with a 1 kHz input. A Successive Approximation Register (SAR) ADC is a converter architecture that internally performs a binary search against the analog input, locking one bit per clock cycle until the final 12-bit code is latched in ~25 us. SAR converters sit within the broader hierarchy of analog-to-digital converters -> data converters -> mixed-signal ICs, and are favoured for applications that need deterministic latency, low latency per conversion, and no pipeline delay - unlike pipelined or delta-sigma ADCs that trade latency for higher speed or resolution. The ADS7806U/1KE4 specifically targets industrial signal chains where 5 V single-supply operation and bipolar-input capability are required. Key specifications include maximum 25 us acquisition-plus-conversion time, +/-1/2 LSB maximum integral non-linearity (INL) and differential non-linearity (DNL), 35 mW typical active power dissipation, and a true-differential sample-and-hold input structure. The converter is pin-compatible with the 16-bit ADS7807, allowing an upgrade path to higher resolution without PCB rework. Parallel-byte, parallel-word, and serial interface modes are user-selectable on start-up pins. The architecture uses a charge-redistribution DAC array, an onboard clock, and a precision reference buffer. An analog input front-end scales +/-10 V signals directly to the internal 0 V-4 V converter range, eliminating external op-amp signal conditioning in most cases. The internal reference is trimmed for low drift, and an external reference pin is also available for applications that require ratiometric measurement or absolute-accuracy calibration. Typical applications include industrial process-control analog input modules, multi-channel data-acquisition systems, portable instrumentation, power-line monitoring, and embedded control loops where 12-bit resolution and bipolar input are sufficient. The SO-28 footprint allows easy layout on 2-layer industrial PCBs. When designing with this device, select the input range by tying RANG pin high or low, and decouple REF with a low-ESR 10 uF ceramic plus 0.1 uF bypass combination. Ensure the RCAP pin is left floating only when using the internal reference. This page synthesises distributor pricing, drop-in TI and cross-brand alternatives, and practical layout notes not found in the manufacturer datasheet alone, giving procurement and design engineers a single decision-ready view of the part.

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ADS7806UE4 - 12-Bit 25us SAR ADC, 28-SOIC | Texas Instruments
ADS7806UE4

ADS7806UE4 - 12-Bit 25us SAR ADC, 28-SOIC | Texas Instruments

The Texas Instruments ADS7806UE4 is a 12-bit, low-power, sampling CMOS analog-to-digital converter (ADC) that performs a complete 16-bit-compatible acquisition and conversion cycle in 25 microseconds maximum, housed in a 28-pin SOIC (DW) package. It features one single-ended analog input channel, true 12-bit SAR architecture with internal sample-and-hold, and supports bipolar or unipolar input ranges of ±10V, 0V to +5V, and 0V to +4V from a single +5V supply. Output data is presented through a parallel (DB0-DB11 plus sign) or serial interface, with HW or SW control of the conversion sequence. What is a SAR ADC? A successive-approximation-register (SAR) ADC is a type of analog-to-digital converter that uses an internal comparator, a digital-to-analog converter (DAC), and a successive-approximation register to digitize an analog input one bit at a time. SAR ADCs sit within the broader taxonomy of Nyquist-rate data converters (ADC -> data converter -> mixed-signal IC -> semiconductor) and are valued for deterministic latency, no pipeline delay, and excellent DC accuracy at moderate sampling rates, making them ideal for multiplexed data acquisition and industrial process control. Key features of the ADS7806UE4 include 72 dB minimum SINAD with a 1 kHz input, ±1/2 LSB maximum INL and DNL (no missing codes), an internal or external reference option, and a true single +5V supply operation. Power dissipation is 35 mW maximum during active conversion and drops to just 50 µW in hardware-controlled power-down mode, allowing battery-powered and thermally-constrained systems to manage energy budgets without sacrificing dynamic range. Architecturally, the device uses a charge-redistribution DAC array with a low-noise comparator, laser-trimmed scaling resistors that establish the bipolar and unipolar input ranges, and a flexible serial/parallel digital interface that simplifies connection to microcontrollers, DSPs, and FPGAs. The pin-compatible 16-bit ADS7807 is offered for designs that need higher resolution within the same board layout, and a parallel 16-bit family is also documented in TI's data converter brochure. Typical applications include industrial process control data acquisition boards, portable instrumentation and battery-powered measurement front-ends, medical monitoring equipment front-ends, and multi-channel multiplexed data acquisition subsystems. Design tip: provide a clean +5V analog supply rail with sufficient decoupling near AVDGND, keep the analog input traces short and guarded, and add a small RC at the analog input for op-amp settling when the source impedance exceeds the recommended value. This page synthesizes distributor pricing, drop-in pin-compatible alternatives in the same 28-SOIC footprint, and practical design notes not consolidated on the manufacturer datasheet.

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ADS7806UG4 - 12-Bit 40kSPS SAR ADC | Texas Instruments
ADS7806UG4

ADS7806UG4 - 12-Bit 40kSPS SAR ADC | Texas Instruments

The Texas Instruments ADS7806UG4 is a low-power, 12-bit sampling CMOS Analog-to-Digital Converter (ADC) with a successive approximation register (SAR) architecture, offered in a 28-pin SOIC (DW) package. It features a maximum sampling rate of 40 kSPS, ±10V, 0V to +5V, and 0V to +4V true bipolar input ranges, and operates from a single +5V supply while drawing only 35 mW of power (50 µW in power-down mode). Key features include 12-bit resolution with no missing codes, ±1/2 LSB maximum INL and DNL, 72 dB minimum SINAD at a 1 kHz input, internal 2.5V reference (or external reference option), parallel and serial data output drivers, and pin compatibility with the 16-bit ADS7807. The 28-SOIC package allows easy migration to higher resolution within the same footprint. A SAR (Successive Approximation Register) ADC is a precision data-conversion topology that uses a binary-search algorithm against an internal DAC and comparator to digitize an analog input one bit at a time. SAR ADCs sit in the broader hierarchy of: ADC -> data converter -> signal-chain IC -> mixed-signal semiconductor. They are prized for deterministic latency, no-pipeline-delay behavior, and excellent DC accuracy, which is why the ADS7806UG4 remains a popular choice for multiplexed industrial data-acquisition systems. Typical applications include industrial process control, multi-channel data acquisition boards, instrumentation, portable battery-powered measurement, and medical monitoring front-ends. The single +5V supply and software-controlled power-down mode make it well suited for power-sensitive embedded designs. When designing with this device, ensure the analog input is properly buffered and that the SHDN pin is asserted for at least 1 µs to enter power-down. A 10 µF bypass capacitor on REF and 0.1 µF on VDD are recommended for stable conversions. The SAR architecture guarantees zero pipeline delay, simplifying multiplexed sampling. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ADS7807P - 16-Bit 40kSPS SAR ADC, ±10V Input | Texas Instruments
ADS7807P

ADS7807P - 16-Bit 40kSPS SAR ADC, ±10V Input | Texas Instruments

The Texas Instruments ADS7807P is a 16-bit, low-power, sampling CMOS Analog-to-Digital Converter (ADC) housed in a 28-pin PDIP (0.3-inch DIP-28) package, providing a pin-compatible upgrade path from the 12-bit ADS7806 family. It uses a successive-approximation-register (SAR) architecture with an internal sample-and-hold, clock, reference, and a flexible parallel/serial microprocessor interface. A successive-approximation-register ADC is a converter that performs a binary search against the analog input using an internal DAC, producing a digital output one bit at a time per clock cycle. Within the converter hierarchy, the SAR ADC sits between flash and sigma-delta converters: faster than sigma-delta, lower-power than flash, and ideally suited to multiplexed data-acquisition systems where 12-to-16-bit precision meets 10 kSPS-to-1 MSPS throughput. The ADS7807P occupies the 16-bit, ~40 kSPS node of this spectrum. Key features of the ADS7807P include ±1.5 LSB maximum integral nonlinearity (INL), 16-bit no-missing-codes performance, 86 dB minimum SINAD at a 1 kHz input, and three software-selectable input ranges: ±10 V, 0 V to +5 V, and 0 V to +4 V. Maximum power dissipation is 35 mW, and a hardware- or software-controlled power-down mode drops quiescent consumption to 50 µW, making the part attractive for battery-powered and multiplexed systems. Architecture-wise, the part uses a charge-redistribution CDAC with input transient suppression, internal 2.5 V reference (external override supported), and a single +5 V supply rail. The maximum acquisition-plus-conversion time is 25 µs, supporting a maximum throughput of approximately 40 kSPS in classic parallel mode. Typical applications include industrial process-control front ends, multi-channel data-acquisition boards, portable instrumentation, weigh-scale and sensor-signal digitization, and medical monitoring equipment such as patient-monitoring front ends. When designing with the ADS7807P, pay close attention to the input-protection RC network, keep analog and digital grounds separated at a single star point, and place the supply decoupling capacitors as close to the AVDD/DVDD pins as the PCB layout allows. A logic-low on R/C initiates conversion, and BUSY remains high until data is latched. This page consolidates distributor pricing, drop-in cross-references, and practical design notes that are not found in a single place in the manufacturer datasheet, accelerating evaluation and procurement decisions for design engineers.

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ADS7807PBG4 - 16-Bit 40kHz SAR ADC | Texas Instruments
ADS7807PBG4

ADS7807PBG4 - 16-Bit 40kHz SAR ADC | Texas Instruments

The Texas Instruments ADS7807PBG4 is a low-power, 16-bit, sampling CMOS analog-to-digital converter based on a successive-approximation-register (SAR) architecture, offering 40 kHz throughput in a 28-pin PDIP package. It operates from a single +5 V supply and dissipates only 35 mW typical, with a power-down mode consuming 50 µW for battery-friendly portable designs. Key specifications include ±1.5 LSB max INL, 16-bit no-missing-codes DNL, and 86 dB minimum SINAD with a 1 kHz input. A successive-approximation-register ADC is a type of data converter that performs a binary search through successive bit trials to resolve the input voltage in N clock cycles for N bits of resolution. SAR ADCs sit within the broader data-converter hierarchy of Nyquist-rate sampling ADCs, distinct from sigma-delta and pipeline architectures. They are prized for low latency, single-shot precision, and simplicity, making them the workhorse choice for industrial control loops, sensor digitisation, and instrumentation front ends. Key features of the ADS7807PBG4 include bipolar input ranges of ±5 V and 0 V to +4 V (plus 0 V to +5 V depending on configuration) without external signal conditioning, an integrated sample-and-hold amplifier, and flexible serial (SPI-compatible) or parallel data interface. The 25 µs maximum acquisition-and-conversion cycle keeps loop delays minimal, while external reference support lets designers trade noise, scale, and temperature drift against cost. The ADS7807PBG4 uses a charge-redistribution DAC array with a custom CMOS comparator and laser-trimmed resistors to achieve 16-bit linearity without missing codes across the full operating temperature range. Its input stage accepts single-ended bipolar signals through internal level-shifting, and the digital interface provides straight binary or two's-complement output coding for direct micro-controller or DSP hand-off. Typical applications include industrial process control, multi-channel data-acquisition systems, portable instrumentation, weigh scales, and battery-powered sensor digitisation. The low power dissipation makes it ideal for remote or handheld equipment. Designers should provide adequate input bandwidth, a low-impedance reference with a 10 µF bypass capacitor, and short analog-trace routing to preserve 86 dB SINAD. Do not exceed the absolute maximum ratings; for bipolar inputs add external clamping to keep transients within ±25 V. This page consolidates distributor pricing, drop-in alternatives, and design guidance that goes beyond the manufacturer datasheet to accelerate your evaluation and sourcing decisions.

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ADS7807PG4 - 16-Bit 40kSPS Low-Power SAR ADC | Texas Instruments
ADS7807PG4

ADS7807PG4 - 16-Bit 40kSPS Low-Power SAR ADC | Texas Instruments

The Texas Instruments ADS7807PG4 is a low-power, 16-bit, sampling CMOS Analog-to-Digital Converter (ADC) housed in a 28-pin PDIP (through-hole) package. Built on a successive approximation register (SAR) architecture with a capacitive charge-redistribution DAC, the device integrates a sample-and-hold, internal clock, internal reference, and a configurable digital interface that supports both parallel and serial output modes. The converter operates from a single +5 V supply and accepts bipolar or unipolar input ranges of +/-10 V, +/-5 V, 0 V to 10 V, and 0 V to 4 V, making it a flexible front-end for industrial data-acquisition boards. A Successive Approximation Register (SAR) ADC is a type of data converter that resolves one bit per clock cycle by comparing the sampled input against a binary-weighted capacitor network driven by an internal reference. SAR ADCs sit between flash converters (very fast, low resolution) and sigma-delta ADCs (high resolution, slower) in the data-converter hierarchy, offering a balance of speed, accuracy, and deterministic latency that is well suited to multiplexed multi-channel measurement systems. Key specifications of the ADS7807PG4 include a maximum sampling rate of 40 kSPS, maximum acquisition-plus-conversion time of 25 us, +/-1.5 LSB maximum INL, 16-bit no-missing-codes DNL, and 86 dB minimum SINAD with a 1 kHz input. The part draws only 35 mW during conversion and falls to 50 uW in power-down mode, which makes it well matched to battery-instrumented or thermally-constrained designs. Operating temperature range is -40 C to +85 C (industrial grade). Architecture-wise, the ADS7807PG4 uses an inherent sample-and-hold front-end that allows the input stage to settle before conversion, removing the need for an external buffer in most applications. The internal 2.5 V reference is laser-trimmed and can be overdriven externally if system calibration is required. The output data bus can be configured for 8-bit or 16-bit parallel mode, plus a synchronous serial mode for low-pin-count designs. Typical applications include industrial process-control data-acquisition front ends, multi-channel instrumentation digitizers, weigh-scale and strain-gauge signal chains, panel meters, battery-powered portable test equipment, and medical instrumentation front ends. The wide +/-10 V true-bipolar input range removes external signal-conditioning in many PLC and SCADA designs. When designing with this part, place a 10 uF tantalum in parallel with a 0.1 uF ceramic bypass capacitor as close as possible to the +5 V supply pin, and ensure the analog input source impedance stays below the manufacturer's recommended maximum to keep INL within data-sheet limits. Use the BYTE and R/C pins to configure interface mode and initiate conversions. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone, giving engineers a single reference for the ADS7807PG4.

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ADS7807UBE4 - 16-Bit 40kHz SAR ADC, 28-SOIC | Texas Instruments
ADS7807UBE4

ADS7807UBE4 - 16-Bit 40kHz SAR ADC, 28-SOIC | Texas Instruments

The Texas Instruments ADS7807UBE4 is a low-power, 16-bit, sampling CMOS analog-to-digital converter (ADC) based on a successive-approximation-register (SAR) architecture, housed in a 28-pin SOIC (DW) package with 0.295" (7.50 mm) body width. It supports input ranges of +/-10V, 0V to +5V, and 0V to +4V from a single +5V supply, integrating a sample-and-hold, clock, reference, and serial/parallel data interface on-chip. The -E4 suffix denotes the Tape and Reel packaging option within the wider ADS7807 family originally introduced by Burr-Brown (now part of Texas Instruments). What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision converter type that uses a binary-search algorithm against an internal DAC to resolve an analog input one bit per conversion cycle. SAR ADCs sit in the precision data-converter hierarchy between delta-sigma converters (which trade speed for resolution) and flash converters (which trade resolution for speed), making the SAR topology the workhorse choice for 12-18 bit industrial, instrumentation, and data-acquisition applications where both resolution and deterministic latency matter. Key features include 35 mW maximum power dissipation, 50 uW power-down mode for battery-friendly duty-cycled operation, 25 us maximum acquisition-and-conversion time (yielding ~40 kSPS throughput), +/-1.5 LSB maximum INL, guaranteed 16-bit no-missing-codes DNL, and 86 dB minimum SINAD with a 1 kHz input. The pin-compatible 12-bit ADS7806 and the older pin-compatible 12-bit ADS7805 allow resolution migration on the same PCB layout. Internally, the ADS7807 uses a charge-redistribution capacitive DAC array for the SAR conversion, with the internal 2.5V reference driving the binary-weighted capacitor network. The converter offers both a serial (SPI/QSPI/MICROWIRE-compatible) interface and a parallel (8/16-bit) data bus, multiplexed on the same pins, enabling flexible MCU or DSP hook-up without external glue logic. A hardware BYS pin lets the user bypass the internal reference when system-level ratiometric accuracy is required. Typical applications include industrial process-control analog input modules, multi-channel data-acquisition (DAQ) boards, weigh-scale front ends, pen-trace digitizers, portable medical instrumentation, and precision sensor signal chains. The wide bipolar +/-10V input range also makes the part a strong fit for retrofit of legacy 12-bit +/10V systems that need higher resolution without changing the front-end scaling. When designing with the ADS7807UBE4, note that the part draws ~7 mA from +5V during conversion and drops to ~10 uA in power-down; therefore, the application logic should gate BUSY/R/C and shutdown for thermal and battery optimization. A 10 uF (minimum) tantalum plus 0.1 uF ceramic at +VANA and +VAND is recommended close to the pins to keep the reference regulator noise off the conversion floor. This page synthesizes distributor pricing, drop-in alternative analysis, and practical PCB/thermal notes that go well beyond what the manufacturer datasheet reproduces on its own.

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ADS7808UB/1K - 12-Bit 100kHz Serial SAR ADC | Texas Instruments
ADS7808UB/1K

ADS7808UB/1K - 12-Bit 100kHz Serial SAR ADC | Texas Instruments

The Texas Instruments ADS7808UB/1K is a 12-bit, 10 µs successive-approximation-register (SAR) analog-to-digital converter with a 100 kHz sampling rate, housed in a 20-pin SOIC (DW) package supplied on a 1,000-unit tape-and-reel carrier. The part integrates a precision sample-and-hold, internal reference, conversion clock, and a synchronous serial data interface, and is rated for an industrial –40 °C to +85 °C operating range on a +5 V single supply. An SAR ADC is a successive-approximation-register analog-to-digital converter: it compares the sampled input against a binary-weighted internal DAC bit-by-bit in N clock cycles (here N = 12), producing a deterministic, low-latency conversion ideal for multiplexed data-acquisition, motor control feedback loops, and DSP front-ends. Within the broader taxonomy, the ADS7808UB sits at: ADC -> data converter -> signal-chain IC -> semiconductor. The 72 dB SINAD and ±½ LSB INL/DNL specifications confirm true 12-bit performance with no missing codes. Key features include 100 kHz throughput, 72 dB SINAD at 45 kHz input, ±½ LSB integral and differential nonlinearity, six factory-trimmed input ranges (0–5 V, 0–10 V, ±5 V, ±10 V, etc.), serial data output that can be clocked from the internal oscillator or an external DSP clock, and a hardware SYNC pulse that simplifies frame alignment to standard serial ports. The reference is internal by default but may be overdriven externally for multi-channel ratio-metric systems. Typical applications include industrial process-control front-ends, multi-channel data-acquisition boards, DSP-based vibration and motor-control signal chains, portable instrumentation, and any pin-compatible upgrade path from the older ADS7808. When designing, note that the device is pin-compatible with the 16-bit ADS7809, providing an upgrade route without PCB rework, and that the internal reference settling time influences acquisition timing at higher throughput rates.

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ADS7810U/1KG4 - 12-Bit 800kHz SAR ADC | Texas Instruments
ADS7810U/1KG4

ADS7810U/1KG4 - 12-Bit 800kHz SAR ADC | Texas Instruments

The Texas Instruments ADS7810U/1KG4 is a 12-bit, 800 kHz sampling successive approximation register (SAR) analog-to-digital converter with one single-ended input, internal sample-and-hold, internal reference, and a parallel data interface with output latches, housed in a 28-pin SOIC package. According to the manufacturer datasheet, it achieves a 1.25 us throughput time, 69 dB minimum SINAD with a 250 kHz input, +/-3/4 LSB maximum INL, and +/-1 LSB maximum DNL. The ADC accepts a standard +/-10 V input range and operates from analog supplies of +/-5 V plus a 5 V digital supply. An SAR ADC (Successive Approximation Register analog-to-digital converter) is a precision data-conversion architecture that uses a binary-search algorithm against an internal capacitive DAC to resolve an analog input one bit per clock cycle, producing deterministic latency and zero pipeline delay. In the broader data-converter hierarchy, SAR ADCs sit between flash converters (fastest, lowest resolution) and sigma-delta ADCs (slowest, highest resolution), and they are the dominant choice for 8- to 18-bit industrial, instrumentation, and process-control applications. Key features include an internal 2.5 V reference (with external-reference override option), a complete S/H, internal clock, self-bipolar input scaling that supports true +/-10 V swing, and a parallel data bus with read-only or write-then-read handshake modes. The 28-SOIC package provides robust mechanical handling for socketed designs and through-hole-style rework flows, while still being surface-mount-compatible for automated assembly. The ADS7810 architecture combines a charge-redistribution capacitive DAC with a low-noise comparator and on-chip clock generator, eliminating the need for an external sampling clock. The internal reference is trimmed for low drift, and the bipolar input network uses precision thin-film resistors for accurate gain, which is what enables the +/-10 V input range from a single-ended source on a +/-5 V analog supply. Typical applications include industrial process control, data acquisition systems, instrumentation, portable or bench-top test equipment, and optical or analytical front-ends where mid-resolution 12-bit conversion at sub-microsecond throughput is required. The wide +/-10 V input also makes it well suited to legacy 4-20 mA loop interfaces and motor-control position feedback. When designing with this ADC, pay close attention to the analog and digital supply decoupling network: at least 10 uF tantalum and 0.1 uF ceramic at each AVdd and DVdd pin, with the ground-return path kept separate to prevent digital switching noise from coupling into the SAR comparator. A small RC anti-alias filter (typically 100 ohm and 1 nF) at the input is recommended to limit wideband noise into the input network. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet. The /1KG4 suffix designates a 1,000-piece tape-and-reel packaging variant with green (Pb-free, RoHS-compliant) material set; the underlying die and electrical specifications are identical to the standard ADS7810U.

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ADS7810UB - 12-Bit 800kHz SAR ADC ±10V | Texas Instruments
ADS7810UB

ADS7810UB - 12-Bit 800kHz SAR ADC ±10V | Texas Instruments

The Texas Instruments ADS7810UB is a 12-bit, 800 kHz sampling CMOS analog-to-digital converter (ADC) that delivers 1.25 µs throughput in a 28-pin SOIC (DW) package. It accepts a standard ±10 V input range, integrates a SAR architecture with inherent sample-and-hold (S/H), an internal reference, and a parallel microprocessor-compatible digital interface with output latches. According to the manufacturer datasheet, the device achieves 69 dB minimum SINAD at 250 kHz input, ±3/4 LSB maximum INL, and ±1 LSB maximum DNL at 12 bits. A successive-approximation register (SAR) ADC is a precision converter topology that resolves a single conversion in N clock cycles by switching a matched binary-weighted capacitor array against the input voltage. SAR ADCs sit at the bottom of the converter hierarchy: SAR ADC -> Nyquist-rate ADC -> data converter -> mixed-signal IC. They are favoured over delta-sigma or pipeline types when low-latency, single-shot acquisition with bipolar industrial input ranges is required. Key features include a complete single-chip solution (no external reference or S/H required), a wide ±10 V input range well suited to industrial transducer signal levels, low aperture uncertainty, and 8 + 4 parallel output bits that interface directly to standard microprocessors and DSPs. The internal reference is trimmed and the device draws low power, making it attractive for multi-channel multiplexed data-acquisition boards. Architecturally, the ADS7810UB uses a charge-redistribution capacitor DAC for SAR conversion, a buried-zener or bandgap-derived internal reference, and an onboard clock generator, eliminating most external components. Its parallel interface supports independent /RD and /CONVST control lines for synchronous sampling in multiple-ADC systems. Typical applications include industrial process-control front ends, factory-automation data-acquisition cards, medical instrumentation front ends, and the analog input stages of PLCs. The bipolar ±10 V range connects directly to many 4-20 mA loop receivers and transducer outputs after a single resistor scale. When designing with this part, ensure the analog ground and digital ground planes are joined at a single point near the converter and bypass supplies with a 10 µF tantalum in parallel with a 0.1 µF ceramic. Avoid routing digital switching edges near the analog inputs to preserve the 69 dB SINAD floor. This page synthesizes distributor pricing, drop-in alternatives in the same 28-SOIC footprint, and practical design notes not collected in any single manufacturer datasheet.

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ADS7810UB/1K - 12-Bit 800kHz SAR ADC, ±10V Input | Texas Instruments
ADS7810UB/1K

ADS7810UB/1K - 12-Bit 800kHz SAR ADC, ±10V Input | Texas Instruments

The Texas Instruments ADS7810UB/1K is a 12-bit successive-approximation register (SAR) analog-to-digital converter with 800 kHz sampling throughput and a standard ±10 V input range, housed in a 28-pin SOIC package supplied on 1000-piece tape and reel. The integrated architecture includes a sample-and-hold amplifier, precision internal reference, and clock, so no external reference IC or high-frequency clock source is required to achieve full data-sheet performance. A SAR ADC is a converter that resolves the digital output one bit at a time by comparing the sampled-and-held analog input against a precision DAC driven by a successive-approximation register. SAR converters sit within the broader ADC taxonomy of successive-approximation ADC -> data converter -> mixed-signal IC -> semiconductor, and are valued for deterministic latency, low latency, and excellent DC accuracy versus pipeline or sigma-delta architectures that trade latency for higher speed or resolution. Key specifications include 1.25 µs typical throughput time, 69 dB minimum SINAD at 250 kHz input, ±0.75 LSB maximum integral nonlinearity (INL), ±1 LSB maximum differential nonlinearity (DNL), and a parallel data interface with read latches. The internal reference eliminates reference-bias resistor networks and simplifies board layout, while the bipolar ±10 V range allows direct connection to industrial transducer outputs and signal-conditioning stages. This part is built on a low-power CMOS process and supports a 2's-complement binary output format, simplifying software post-processing on microcontrollers or FPGAs that already expect signed data. The integrated design typically operates from a single +5 V supply, with logic-compatible parallel outputs that interface to 74HC or modern MCUs. Typical applications include industrial process control data acquisition, multi-channel multiplexed instrumentation systems, automated test equipment, and motor control feedback loops that demand deterministic conversion latency. Designers select the ADS7810UB/1K when the input swing is already at ±10 V and system noise bandwidth is well below Nyquist. When designing with this ADC, allocate adequate settling time on the input amplifier and ensure the reference decoupling follows the datasheet recommended capacitor network. The parallel interface simplifies layout but consumes more board traces than an SPI-based ADC, so plan FPGA/MCU pin allocation early. This page synthesizes distributor pricing, drop-in alternative listings, and PCB design notes not found in the manufacturer datasheet alone, providing an at-a-glance comparison view for engineers selecting a 12-bit, 800 kHz SAR ADC for industrial acquisition.

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ADS7811U/1K - 16-Bit 250kSPS SAR ADC, 28-SOIC | Texas Instruments
ADS7811U/1K

ADS7811U/1K - 16-Bit 250kSPS SAR ADC, 28-SOIC | Texas Instruments

The Texas Instruments ADS7811U/1K is a 16-bit, 250-kSPS successive-approximation register (SAR) analog-to-digital converter with a single-ended input, supplied on a 28-pin SOIC (DW) tape-and-reel carrier. The device integrates a 4 µs conversion engine, internal clock, and a parallel output interface, drawing from a single +5 V analog supply. The /1K suffix designates the 1,000-piece tape-and-reel packaging variant. An SAR ADC is a class of analog-to-digital converter that uses a binary search algorithm, implemented by a successive-approximation register, to digitize each analog sample in a fixed number of clock cycles. The architecture is valued for its deterministic latency, low power consumption, and excellent DC accuracy, which together make SAR converters the standard choice for multiplexed data-acquisition systems, industrial control loops, and instrumentation front ends. As a member of the wider data-converter hierarchy, the ADS7811 sits between sigma-delta (which trades speed for higher resolution) and flash/pipeline ADCs (which trade resolution for multi-MSPS speeds). Key specifications include 16-bit no-missing-codes performance, ±1 LSB INL typical, 0.0092 % linearity error, and 4 µs typical conversion time. The device operates from a single +5 V supply and accepts unipolar 0–VREF or ±10 V true-bipolar analog inputs through its configurable input front end. The 28-SOIC footprint keeps the part compatible with hand-reworkable through-hole-adjacent designs and is identical to that of the ADS7807U, ADS8505, and ADS7805U family, enabling multi-generation PCB reuse. Typical applications include industrial process control, multi-channel data-acquisition boards, digital oscilloscope front ends, weigh scales, and precision instrumentation. The combination of 250 kSPS throughput and 16-bit accuracy suits mid-bandwidth transducer digitization where a multiplexer precedes the converter. The internal 2.5 V reference can be overdriven by an external system reference when ratio-metric or ratiometric measurements are required. A primary design consideration is input-signal conditioning: a low-impedance driver amplifier must settle within the 4 µs acquisition window to avoid conversion errors. For multi-channel systems, ensure the front-end multiplexer switches settle before the CONVST pulse. The 28-SOIC thermal pad (if present on the package variant) should be soldered to a copper pour to minimize ground-bounce and keep the digital outputs within noise margins. This page synthesizes verified distributor pricing, drop-in alternatives drawn from the same 28-SOIC SAR ADC family, and practical design notes that go beyond what is found in the manufacturer datasheet alone. Pin-compatible variants from Texas Instruments and qualified second-source suppliers are tabulated side-by-side so engineers can quickly evaluate substitutes without leaving the page.

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ADS7811U/1KG4 - 16-Bit 250kHz SAR ADC, 28-SOIC | TI
ADS7811U/1KG4

ADS7811U/1KG4 - 16-Bit 250kHz SAR ADC, 28-SOIC | TI

The Texas Instruments ADS7811U/1KG4 is a 16-bit, 250-kSPS successive-approximation register (SAR) analog-to-digital converter with a single-ended analog input channel, offered in a 28-pin SOIC (DW) package and supplied on a 1,000-piece tape-and-reel reel. The ADS7811U/1KG4 integrates a 16-bit capacitor-based SAR ADC with an inherent track-and-hold front end, an internal precision reference, and an internal conversion clock, eliminating the need for external reference components and simplifying PCB design. According to TI's ADS7811 product page, the converter achieves >100 dB SFDR with a 100 kHz full-scale sine input while operating from ±5 V analog and 5 V digital supplies. A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm to digitize an input signal one code at a time per clock cycle. SAR ADCs sit in the data-converter hierarchy between flash converters (which are fastest but lowest resolution) and delta-sigma converters (which offer the highest resolution at lower bandwidth). The SAR architecture is favored for 12- to 18-bit, 100-kSPS-to-1-MSPS multi-channel data-acquisition systems where low latency, deterministic throughput, and excellent AC linearity are required. Key features of the ADS7811U/1KG4 include 250 kHz throughput, integral nonlinearity typically 0.0092%, ±10 V (or 0 to 4 V) true bipolar input ranges, a serial data interface, and an operating temperature range of -25 °C to +85 °C. The internal 2.5 V reference is trimmed for low drift, and a REF_OUT pin supplies external circuitry. The 28-pin SOIC footprint occupies a modest board area suited to industrial data-acquisition boards, instrumentation front-ends, and DSP-ready signal chains. Typical applications include industrial process-control analog input modules, multi-channel data-acquisition systems, digital signal processing front-ends, test and measurement equipment, and medical instrumentation signal chains where 16-bit resolution at moderate sample rates is required. The wide bipolar input range supports direct connection to ±10 V transducer outputs without external signal conditioning. When designing with this device, ensure the analog and digital supplies are decoupled with 10 µF tantalum and 0.1 µF ceramic capacitors placed as close as possible to the supply pins. Maintain a clean analog ground plane separate from the digital ground, joining them only at the AGND-to-DGND pin. The conversion clock, serial data, and CS signals should be routed away from the analog input traces to avoid digital noise coupling into the conversion result. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes that go beyond the manufacturer datasheet.

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ADS7812U/1KG4 - 12-Bit 40kSPS Serial ADC SOIC-16 | Texas Instruments
ADS7812U/1KG4

ADS7812U/1KG4 - 12-Bit 40kSPS Serial ADC SOIC-16 | Texas Instruments

The Texas Instruments ADS7812U/1KG4 is a low-power, single +5V supply, 12-bit successive-approximation analog-to-digital converter with a maximum conversion time of 20 microseconds (40 kSPS sample rate), housed in a 16-pin SOIC (SO-16) plastic package. It integrates a 12-bit capacitor-based SAR ADC core with sample-and-hold, internal clock, internal reference, and a flexible SPI-compatible serial data interface that can synchronize to an internal or external clock. The /1KG4 suffix denotes a tape-and-reel, 1k-piece packaging variant on top of the standard industrial-grade ADS7812U device. An SAR (Successive Approximation Register) ADC is a converter architecture that performs a binary search through an internal capacitor DAC, converging on the input voltage in N clock cycles for an N-bit converter; this yields deterministic latency, low power, and excellent AC/dc performance at moderate sampling rates (typically up to ~1 MSPS). As part of the ADC hierarchy, the ADS7812U/1KG4 sits under the SAR ADC and 12-bit ADC families within precision converter ICs, the highest level of which is the data-converter / signal-chain IC taxonomy. Key features of this part include ±10 V, ±5 V, 0 V to 10 V, 0.5 V to 4.5 V, and 0.3 V to 2.8 V input-range configurability without external signal conditioning, ±0.5 LSB max INL and DNL, an easy-to-use serial interface, and pin-compatibility with the 16-bit ADS7813 family for upgrade-in-place designs. Typical INL of 0.0122% linearity and a 5 V single-supply rail make the part straightforward to drop into 5 V-only systems. Architecturally, the device combines a charge-redistribution capacitor DAC, a low-noise CMOS comparator, an SAR register, and an on-chip reference buffer; its serial interface supports several modes (synchronous external, asynchronous internal, and Daisy-Chain) for multi-channel digitizer boards, while its guaranteed 40 kSPS over the -40C to +85C industrial range makes it well suited to process control and instrumentation front-ends. Typical applications include industrial process control multiplexed analog front ends, multi-channel data-acquisition boards using its daisy-chain serial mode, 4-20 mA loop-powered sensor digitizers, portable instrumentation and battery-powered test gear, and direct upgrade paths in place of 12-bit ADCs where the system benefits from wider bipolar input ranges. When designing with this part, place the supply bypass capacitor (10 uF tantalum in parallel with 0.1 uF ceramic) within a few millimeters of the VDD pin and keep the analog input traces short and guarded; the converter's one-rail +5 V supply topology makes it well suited to noise-sensitive designs where a quiet analog plane is available, but it should not share an analog return with high-current switching nodes. This page synthesizes distributor pricing, datasheet-derived electrical characteristics, verified drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet to help procurement and design engineers select and apply the ADS7812U/1KG4 confidently.

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ADS7813PG4 - 16-Bit 40kHz SAR ADC, ±10V Input | Texas Instruments
ADS7813PG4

ADS7813PG4 - 16-Bit 40kHz SAR ADC, ±10V Input | Texas Instruments

The Texas Instruments ADS7813PG4 is a 16-bit, successive-approximation (SAR) analog-to-digital converter that delivers 40 kHz throughput from a single +5V supply. Housed in a 16-pin PDIP (0.300 inch) through-hole package, the device integrates a sample-and-hold, clock, reference, and flexible SPI-compatible serial interface with daisy-chain (TAG) support. Input ranges are software-configurable for ±10V, ±3.3V, 0-10V, 0-5V and 0.5-4.5V, allowing direct connection to industrial sensor outputs without external signal conditioning. A successive-approximation ADC is a type of Nyquist-rate data converter that performs one bit-trial per clock cycle using a binary-weighted capacitor DAC and a comparator. SAR converters are valued for their deterministic latency, lack of pipeline delay, and excellent DC linearity, making them the dominant architecture for precision multi-channel data-acquisition systems, weigh scales, and process-control front ends. The ADS7813 family fits into the wider Texas Instruments precision ADC portfolio alongside pin-compatible 12-bit ADS7812 and faster successive-approximation members such as the ADS8509. Key specifications include 16-bit resolution, 40 kHz maximum sampling rate, 20 µs maximum conversion time, ±10V bipolar or unipolar input ranges, single +5V supply operation, and an operating temperature range of -40°C to +85°C. The pin-compatible ADS7812 (12-bit) and ADS7809 share the same 16-pin DIP and SO-16 footprints, simplifying upgrades and downgrades in the same PCB layout. The G4 suffix indicates Pb-free (lead-free) assembly to RoHS-compliant standards. Typical applications include industrial process control, multi-channel data acquisition, battery monitoring, isolated transducer front ends, weigh scales, and portable instrumentation. The ±10V true bipolar input makes the ADS7813PG4 particularly attractive for direct digitization of 4-20 mA loop outputs when used with a sense resistor. The internal or external reference option allows designers to trade off absolute accuracy against system cost. When designing with this device, place 0.1 µF ceramic bypass capacitors close to the +VD and +VS pins and keep analog and digital grounds separated to a single star-point under the IC. The TAG (daisy-chain) feature allows multiple converters to share one serial bus, reducing digital isolation cost in multi-channel isolated systems. Power dissipation is typically low because of the SAR architecture's duty-cycled analog front end. This page synthesizes verified distributor pricing, drop-in pin-compatible alternatives from the ADS7812/ADS7813 family, and practical layout guidance not found in the bare datasheet, giving engineers a single decision-ready reference for both new designs and legacy through-hole retrofits.

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ADS7813UB/1K - 16-Bit 40kHz SAR ADC, Serial, SOIC-16 | Texas Instruments
ADS7813UB/1K

ADS7813UB/1K - 16-Bit 40kHz SAR ADC, Serial, SOIC-16 | Texas Instruments

The Texas Instruments ADS7813UB/1K is a low-power, single +5V supply, 16-bit sampling successive-approximation-register (SAR) analog-to-digital converter with a 40 kHz throughput and a flexible SPI-compatible serial interface, housed in a 16-pin SOIC (DW) package and shipped on a 1k-unit tape-and-reel. The /1K suffix is a TI packaging code indicating a 1000-piece reel, and the UB grade indicates the SO-16 wide-body package. Headline parameters: 16-bit resolution, 40 kSPS maximum sample rate, 20 microseconds maximum conversion time, single-channel single-ended input with unipolar range, internal or external reference option, and a wide -40C to +85C industrial operating range. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data converter that uses an internal binary-search algorithm to convert an analog input into a digital code over a fixed number of clock cycles. SAR ADCs sit in the broader signal-chain hierarchy of sensor front end -> analog front end -> ADC -> digital processor, and they are valued for their deterministic latency, excellent DC linearity, low power, and small size compared to delta-sigma or pipeline converters. The ADS7813UB/1K is pin-compatible with the 12-bit ADS7812, allowing a single PCB layout to serve both precision grades. Key differentiating features include: 20 microseconds max conversion time (50 kHz internal oscillator), no missing codes at 16 bits, SPI/QSPI/MICROWIRE-compatible serial interface synchronizable to an internal or external clock, a high-impedance analog input stage capable of 10V input span when using an external 5V reference, and a power-down mode that reduces quiescent current between conversions for battery-friendly operation. Internal self-calibration of linearity and offset is performed at power-up. According to TI's product page, the part is rated for the industrial -40C to +85C temperature range. The device integrates an input sample-and-hold, a precision capacitor-based SAR core, an internal 2.5V reference (with optional external reference override), and a serial output engine. The low-noise architecture and 100 dB typical SNR (when using the internal reference and 0-5V input) make it suitable for precision instrumentation where DC accuracy is paramount. The 16-pin SOIC package ensures compatibility with industry-standard SMT assembly lines and hand-solderable prototype rework. Typical applications include industrial process control loop measurement (4-20 mA or 0-10V transducer digitization), precision weigh scales and load-cell digitizers, portable battery-powered data loggers, isolated sensor front ends, multi-channel multiplexed data acquisition boards paired with an external analog mux, and medical instrumentation signal chains. The wide input range (with 5V reference) supports direct connection to bridge sensors and instrumentation-amp outputs. Design consideration: ensure the source impedance at the analog input is low (below 1 kOhm recommended) to avoid gain error and settling issues caused by the input sampling capacitor; add an external RC anti-alias filter. The internal reference is trimmed but can be overridden with an external 2.5V or 5V reference for better absolute accuracy or ratiometric measurements. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ADS7816UB/2K5G4 - 12-Bit 200kS/s MicroPower SAR ADC | Texas Instruments
ADS7816UB/2K5G4

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.

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ADS7817U/2K5G4 - 12-Bit 200kHz Differential Input MicroPower ADC | TI
ADS7817U/2K5G4

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.

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ADS7817UBG4 - 12-Bit 200kHz Differential Input SAR ADC | Texas Instruments
ADS7817UBG4

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.

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ADS7817UG4 - 12-Bit 200kSPS Differential ADC | Texas Instruments
ADS7817UG4

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.

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ADS7822PBG4 - 12-Bit 200kSPS Micro-Power SAR ADC | Texas Instruments
ADS7822PBG4

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.

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