ADC/DAC
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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.
ADS7808P 12-Bit 100 kHz Serial ADC | Texas Instruments
Texas Instruments ADS7808P is a 12-bit, 10 µs serial CMOS sampling analog-to-digital converter with a 100 kHz sampling rate, six specified input ranges including ±10 V and 0 V to 5 V, and a single +5 V supply. The device is packaged in a 20-pin plastic DIP (20-PDIP) package. Its 72 dB SINAD performance and ±1/2 LSB INL and DNL characteristics make it suitable for industrial instrumentation, data acquisition, process control, and precision signal-chain designs that require a compact, low-power serial ADC. An ADC, or analog-to-digital converter, is an integrated circuit that converts a continuously varying analog voltage into a digital code. The ADS7808P belongs to the SAR ADC family: a sample-and-hold circuit captures the input, and a capacitor-based successive-approximation register converts the captured voltage into a 12-bit result. This architecture combines deterministic conversion behavior with relatively low power consumption, making it useful when a system needs accurate measurements without a high-speed flash converter or complex external acquisition hardware. Key features include a 100 kHz maximum sampling rate, 72 dB SINAD with a 45 kHz input signal, six specified input ranges, and a serial output interface that can use either the internal clock or an external data clock. The converter also supports internal or external references. Its innovative single +5 V supply operation keeps system power requirements straightforward, while power dissipation remains below 100 mW according to the manufacturer datasheet. An output synchronization pulse helps interface the converter with standard digital signal processors. The serial interface reduces the number of signal lines required on a mixed-signal PCB, although the conversion timing and serial clock relationship must be handled correctly in firmware or external logic. The internal reference simplifies designs that do not need an externally trimmed or calibrated voltage source. The six input ranges support bipolar and unipolar measurement systems, allowing the same converter family to address sensor signals, industrial process voltages, and conditioned analog outputs. The 10 µs conversion time corresponds to the stated 100 kHz throughput capability when the interface permits continuous operation. Typical applications include multichannel industrial data acquisition, factory process monitoring, programmable logic controller analog input modules, laboratory measurement equipment, and embedded control systems. The ±10 V ranges are particularly useful for legacy industrial signals, while the 0 V to 5 V range suits sensors and low-voltage analog systems. The 12-bit resolution provides 4096 digital code levels across the selected input range and is appropriate for many control and monitoring tasks that require more precision than a coarse 8-bit converter but do not require a 16-bit part. A key design consideration is the analog input and reference network. Place the input filtering components close to the converter pins, use a low-noise reference arrangement, and keep digital clock and serial-data traces away from sensitive analog nodes. Check timing against the external data-clock option when communicating with a DSP, because synchronization behavior affects how each conversion is framed and sampled. This page combines the ADS7808P manufacturer specifications, pin and package guidance, application analysis, and drop-in-replacement criteria to support faster engineering review. Because exact replacement qualification depends on package, pinout, resolution, input range, timing, and supply requirements, any substitute should be checked against the manufacturer datasheet before production use.
ADS7808U - 12-Bit 100 kHz SAR ADC | Texas Instruments
The Texas Instruments ADS7808U is a 12-bit, 10-µs serial CMOS-sampling analog-to-digital converter with a 100 kHz sampling rate, packaged in a 20-pin SOIC. It combines a capacitor-based SAR ADC, sample-and-hold circuit, reference, clock, and serial data interface in one device, delivering 72 dB SINAD with a 45 kHz input. Six specified input ranges and support for internal or external references allow the converter to accommodate different sensor and measurement signals. An ADC is an analog-to-digital converter, a mixed-signal semiconductor that converts a continuous voltage into a numeric code for measurement, control, or processing. The ADS7808 belongs to the SAR ADC hierarchy, where successive approximation compares the sampled input against a capacitor DAC. Compared with flash, pipelined, and sigma-delta converters, this architecture provides straightforward low-power conversion and a compact serial interface suitable for embedded acquisition systems. Key features include a maximum sampling rate of 100 kHz, 12-bit resolution, and linearity specified as ±1/2 LSB for INL and DNL. The converter operates from a single +5 V supply, uses a serial output, and accepts one analog input. Its maximum power dissipation is 100 mW. Pin compatibility with the 16-bit ADS7809 provides an upgrade path when greater resolution is needed without changing the package architecture. Internally, the ADS7808 uses state-of-the-art CMOS structures and supports conversion with its internal clock or synchronization to an external data clock. An output synchronization pulse simplifies interfacing with DSP-based systems. The internal reference can be used for standalone operation, while an external reference offers a route to improve stability or share precision reference circuitry across multiple channels. Typical applications include industrial process measurement, factory automation, DSP data acquisition, closed-loop control, and embedded instrumentation. The 100 kHz conversion rate and 12-bit code width are suitable for signals where rapid sampling and moderate resolution are required. The device is also appropriate for battery-powered or compact industrial systems because its stated maximum power dissipation is only 100 mW. When designing a circuit around the ADS7808U, verify the selected input range, reference configuration, logic levels, and digital interface timing against the manufacturer datasheet. Decoupling and analog signal-path layout are critical because the converter contains a sample-and-hold stage and may be sensitive to supply and reference noise. Confirm the complete conversion and data-read cycle before synchronizing it to a DSP. This page consolidates verified manufacturer and distributor information, package details, application guidance, and clearly qualified drop-in alternatives. It also highlights where direct cross-reference evidence is limited and where engineers must verify pin behavior, electrical limits, and availability before approving a replacement.
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.
ADS7809U - 16-Bit 100 kHz SAR ADC | Texas Instruments
The Texas Instruments ADS7809U is a 16-bit, 100 kHz sampling successive-approximation register ADC with a 10 µs conversion time, six specified input ranges, and serial output in a 20-pin SOIC (DW) package. It operates from a single +5 V supply and can use either its internal clock or an external data clock. An SAR analog-to-digital converter is a sampling ADC that repeatedly estimates the input voltage through successive comparison steps. It belongs to the broader ADC category and provides a practical balance of resolution, conversion speed, power consumption, and circuit complexity. The ADS7809U combines a capacitor-based 16-bit SAR core, sample-and-hold circuitry, a reference, clocking, and a serial interface in one device. Key specifications include 16-bit resolution, a 100 kHz sampling rate, 86 dB SINAD with a 20 kHz input, and ±2 LSB integral nonlinearity. The converter also features 16-bit DNL with no missing codes, six specified input ranges, and single +5 V operation. These characteristics make it appropriate for precision industrial measurement, instrumentation, control, and signal-acquisition systems. The capacitor-based SAR architecture converts the sampled analog input through successive approximation. Data may be transferred through the serial interface using the internal oscillator or synchronized to an external data clock, giving the system designer flexibility in clocking and sampling control. The manufacturer data also identifies the ADS7809 as pin-compatible with the ADS7808, which can simplify comparison between related converter implementations. Typical uses include factory process monitoring, sensor-interface digitizers, laboratory measurement equipment, industrial control loops, and embedded data acquisition. The 86 dB SINAD figure is particularly relevant when the converted signal contains relatively little noise, while the 100 kHz sampling rate supports applications that require substantially more update speed than a slow-resolution integrating ADC. Designers should pay close attention to reference quality, source impedance, analog trace routing, decoupling, and digital-interface timing. The input network and reference must provide low enough noise and settling behavior to preserve the converter's specified accuracy, while the serial interface and clock source must meet the timing requirements described by Texas Instruments. This product data consolidates the verified manufacturer and distributor findings with explicit data gaps, practical engineering guidance, and same-footprint replacement analysis. It is intended to help engineers identify the correct ADC, validate board-level assumptions, and compare genuine 20-pin SOIC drop-in options without conflating merely similar devices with compatible replacements.
ADS7810U - 12-Bit 800 kHz SAR ADC | Texas Instruments
Texas Instruments ADS7810U is a 12-bit successive-approximation-register analog-to-digital converter with a sampling rate of 800 kSPS, a 1.25 µs throughput time, and a single-ended analog input in a 28-pin SOIC package. It accepts a standard ±10 V input range and uses a parallel data interface with latches for transferring converted results. The converter also includes an internal reference, sample-and-hold circuit, and clock circuitry. An ADC is a data-conversion IC that transforms an analog voltage into a digital code for measurement, control, monitoring, or signal-processing systems. The ADS7810 belongs to the hierarchy of ADC, data-converter IC, signal-processing IC, and semiconductor. Its SAR architecture repeatedly compares the sampled input with an internal DAC, determining one output bit during each conversion step. This makes it appropriate for relatively high-speed industrial instrumentation where serial-interface overhead is undesirable. Key performance characteristics include 12-bit resolution, 800 kSPS sampling, ±3/4 LSB maximum integral nonlinearity, ±1 LSB maximum differential nonlinearity, and minimum SINAD of 69 dB with a 250 kHz input. The ±10 V input range supports direct acquisition of bipolar industrial signals. A 5 V digital supply supports compatibility with conventional parallel digital logic, while the analog supply operates from ±5 V according to the product description. The integrated sample-and-hold, reference, clock, and latched parallel outputs reduce the number of external support functions required. The 28-pin SOIC package is larger than modern fine-pitch packages but remains practical for through-hole assembly and moderate-density mixed-signal boards. Because the converter uses a parallel interface, its 12 output data lines require careful routing and adequate grounding to avoid logic coupling into the high-impedance analog input. Typical uses include industrial process monitoring, instrumentation, waveform capture, laboratory equipment, and embedded data-acquisition systems. Engineers should treat the analog input as a high-impedance node, provide adequate bypassing at the supply pins, and preserve the converter’s specified input-voltage limits. The ADC is not intended for signals outside its ±10 V range without suitable external attenuation or protection. A primary design consideration is signal conditioning. The source impedance, acquisition time, and input-network capacitance determine whether the sampled voltage can settle accurately within the converter’s acquisition interval. Short traces, guarding, clean references, and separated analog and digital return paths are especially important when converting small signals at high throughput. This page combines the manufacturer-linked datasheet information with a practical focus on acquisition timing, input conditioning, layout, and verified drop-in comparisons. It also distinguishes true same-package replacements from broader functional equivalents so engineers can assess PCB-reuse risk before selecting an alternative.
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.
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.
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.
ADS7811U - 16-Bit 250 kSPS SAR ADC | Texas Instruments
The Texas Instruments ADS7811U is a 16-bit, 250 kSPS, single-channel successive-approximation analog-to-digital converter with a single-ended input, housed in a 28-pin SOIC package. It combines a capacitor-based SAR converter, an inherent sample-and-hold circuit, a precision internal reference, and an internal clock in one analog signal-conditioning device. The ADS7811U is intended for industrial instrumentation, process control, data acquisition, sensor measurement, and embedded systems that require accurate conversion of a single bipolar or unipolar analog signal. An ADC converts a continuously varying analog voltage into a numeric code for processing, measurement, or control. The ADS7811 uses a successive-approximation architecture, where an internal capacitor array and successive bit trials produce one conversion result after each sample. The 16-bit resolution provides 65,536 possible codes, while the 250 kSPS throughput rate supports signal monitoring and control loops. Its single-ended input simplifies connection to sensors and signal-conditioning circuits compared with a differential-input converter. The principal device characteristics are 16-bit resolution, a 250 kSPS conversion rate, one single-ended analog input, and the 28-pin SOIC package. According to the manufacturer product page and datasheet, the design is intended to provide excellent AC performance and a spurious-free dynamic range exceeding typical expectations for a 100 kHz full-scale sine-wave input. The internal reference and clock reduce external component count and help simplify system design, while the wide operating and temperature options support industrial equipment. Typical deployments include industrial process-control loops, factory automation, environmental monitoring, portable instrumentation, and embedded data loggers. In each case, the converter sits between an analog sensor or signal-conditioning network and a digital controller or communications interface. The ADS7811U is appropriate when a compact, single-channel, moderate-speed SAR ADC is preferable to a higher-speed, higher-channel-count converter. For layout, place input, reference, and decoupling capacitors close to their associated pins and route analog and digital return currents carefully. The analog input must remain within the device’s specified input range, and the system should account for acquisition time, settling behavior, and the relationship between input impedance and sampling dynamics. Review the manufacturer datasheet pin description table and the recommended application circuit before finalizing PCB connections. This product page combines the manufacturer specifications, package information, practical application guidance, and drop-in comparison context to support faster engineering selection and sourcing.
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.
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.
ADS7812P - 12-Bit, 40 kS/s Low-Power SAR ADC | Texas Instruments
The Texas Instruments ADS7812P is a low-power, 12-bit successive-approximation-register analog-to-digital converter with a conversion rate of 40 kS/s, a 20 us maximum conversion time, and a 16-pin plastic DIP package. It operates from a single 4.75 V to 5.25 V supply and includes a sample-and-hold circuit, clock, reference, and serial data interface. The converter supports single-ended input, up to three analog inputs, and selectable bipolar or unipolar input polarity. An ADC is a semiconductor that converts an analog voltage into a digital number for processing, storage, or transmission. The ADS7812P belongs to the successive-approximation-register ADC family, a low-power architecture that compares the sampled input against a capacitor-based internal DAC during successive conversion steps. Its 12-bit resolution provides 4,096 digital codes, making it suitable for data acquisition, industrial control, test equipment, and digital signal processing systems. Key characteristics include ±0.5 LSB maximum integral and differential nonlinearity, 74 dB signal-to-noise ratio, 98 dB spurious-free dynamic range, and at least 72 dB SINAD. The converter can use its internal reference or an external reference, while the power-down mode limits consumption to 50 uW. These characteristics support accurate measurements in systems that do not require the throughput of a high-speed flash converter. The serial interface reduces the number of PCB traces required to connect the converter to a microcontroller, digital signal processor, or programmable logic controller. The ADS7812 family is also pin-compatible with the 16-bit ADS7813, allowing engineers to evaluate resolution changes on a common PCB footprint. Multiple input ranges and selectable polarity broaden its usefulness in sensor, process-control, and instrumentation systems. Typical applications include industrial process monitoring, laboratory data acquisition, digital signal processing, embedded instrumentation, and factory test equipment. Its low-power operation is especially useful where the converter must operate continuously from a single 5 V supply without the power and EMI characteristics of a high-speed switching converter. The primary design consideration is analog signal conditioning. The input source must remain within the selected input range, the reference must be stable, and the serial clock and digital interface must be arranged to satisfy the converter timing requirements. A common mistake is to choose a wide input range for convenience and lose useful code resolution; selecting the narrowest range that safely covers the signal improves effective measurement precision. This product page consolidates the manufacturer specifications, package information, application guidance, and verified replacement candidates into an engineering-oriented reference. It also distinguishes exact drop-in compatibility from changes in resolution or ordering code, helping designers decide whether a substitution can preserve the existing PCB and signal chain.
ADS7812U - 12-Bit 40 kSPS Low-Power ADC | Texas Instruments
The Texas Instruments ADS7812U is a low-power, serial 12-bit sampling analog-to-digital converter with a 40 kSPS conversion rate, ±0.5 LSB maximum integral nonlinearity and differential nonlinearity, and a 16-pin SOIC package. Designed for single +5 V operation, it combines a 20 µs maximum conversion time with an easy-to-use serial interface for compact data-acquisition and control systems. A sampling ADC is a successive-approximation-register converter that samples an analog input and represents it with a 12-bit digital code. The ADS7812U belongs to the sampling ADC > ADC > analog-to-digital converter > integrated circuit hierarchy, combining low power consumption with enough precision for industrial measurement, test equipment, and digital signal processing. It can use an internal or external reference and supports multiple input ranges, allowing it to fit different sensor and signal-conditioning architectures. Key features include 12-bit resolution, a 40 kSPS sampling rate, a 20 µs maximum conversion time, and 72 dB minimum SINAD according to the manufacturer information. The converter also offers pin compatibility with the 16-bit ADS7813, which can simplify migration between 12-bit and 16-bit system designs when signal-chain requirements change. Maximum power dissipation is 35 mW, while power-down mode reduces consumption to 50 µW. The ADS7812U uses a serial interface to transfer conversion results to a microcontroller, DSP, or other digital controller. Its sampling architecture is appropriate for continuously updated analog measurements rather than very-high-rate waveform capture. The 72 dB minimum SINAD specification indicates that signal quality depends not only on nominal resolution but also on noise, reference stability, input-source impedance, and acquisition timing. Typical applications include industrial process-control loops, data-acquisition systems, test and measurement equipment, digital signal processing front ends, and portable instrumentation. Its 40 kSPS rate is suitable for sensors that change at human or machine-cycle speeds, while its low 35 mW maximum dissipation supports compact, low-power designs. Designers should follow the manufacturer pin and layout guidance, place input and reference components close to the converter, and account for source settling during each sample-and-hold acquisition. Because the exact pin assignments, input-range table, timing values, and recommended external-component values are not included in the supplied web excerpts, the complete manufacturer datasheet should be consulted before final schematic or PCB release. This page combines verified manufacturer and distributor information with application guidance, engineering considerations, and a conservative drop-in assessment. It distinguishes confirmed pin-compatible devices from functional alternatives and identifies missing technical details instead of estimating unverified values.
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.
ADS7813P - 16-Bit, 40 kSPS Low-Power ADC | Texas Instruments
The Texas Instruments ADS7813P is a low-power, single-channel 16-bit sampling analog-to-digital converter with a 40 kSPS conversion rate, single +5 V supply operation, and a 16-pin DIP package. It combines a complete capacitor-based successive-approximation converter, sample-and-hold circuit, reference circuitry, clock logic, and serial data interface in one device. The serial interface can operate with internal or external clocking and supports synchronization with common microcontrollers. An ADC is a data-conversion IC that transforms an analog voltage into a numeric value for processing, measurement, or control. Successive-approximation, or SAR, ADCs repeatedly compare the sampled input with a trial DAC and progressively refine the result. This architecture is appropriate for precision instrumentation, industrial measurement, data acquisition, and embedded control because it combines deterministic conversion behavior, serial digital output, and relatively low power consumption. The ADS7813P belongs to the ADC, data-converter IC, signal-processing IC, and semiconductor hierarchies. The ADS7813P provides 16-bit resolution, a sampling rate of up to 40 kSPS, and a maximum conversion time of 20 microseconds. It operates from a single +5 V supply and can be configured for several analog input ranges, including ±10 V, ±5 V, 0 V to 10 V, and 0.5 V to 4.5 V. A high-impedance input range from 0.3 V to 2.8 V is also supported. These input options make the converter adaptable to bipolar instrumentation signals, unipolar process-control voltages, and low-level sensor outputs when appropriate front-end circuitry is used. The converter is pin-compatible with the 12-bit ADS7812, enabling a simplified upgrade path when greater numerical resolution is required without changing the board footprint. Its capacitor-based SAR core uses a sample-and-hold stage to capture the input before successive comparison begins. The integrated reference, clock, and serial interface reduce the number of external components and simplify synchronization with embedded systems. Use the manufacturer pin-description table when assigning PCB signals because the exact physical pin functions and layout requirements must be followed without modification. Typical applications include precision digital voltmeters, process-control instrumentation, temperature measurement systems, laboratory data loggers, industrial sensor interfaces, and low-speed closed-loop monitoring. The 40 kSPS rate is suitable for continuously changing control or measurement signals rather than high-frequency waveform capture. An external buffer, protection network, or gain stage may be needed when the source impedance, common-mode voltage, or input range exceeds the converter's direct connection limits. Design the reference and analog input paths for low noise, and place the input and reference components close to the converter to minimize trace pickup. Confirm settling time, acquisition time, source impedance, and clock timing in the manufacturer datasheet. Account for conversion latency in the data-processing pipeline, and use the supported serial clock configuration to avoid readback errors during changing input conditions. This product page combines manufacturer specifications, sourcing information, package details, practical design guidance, and a structured comparison of documented ADS7813 family options. It is intended to help engineers evaluate the ADS7813P for low-power, high-resolution measurement designs and to plan PCB, signal-chain, and firmware integration with fewer engineering assumptions.
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.
ADS7813U - 16-Bit SAR ADC, 20 µs, 5V | Texas Instruments
Texas Instruments ADS7813U is a low-power, serial 16-bit sampling analog-to-digital converter with one SAR input, a maximum conversion time of 20 µs, single +5 V supply operation, and a 16-pin SOIC package. It accepts bipolar and unipolar input ranges, including ±10 V, ±5 V, 0 V to 10 V, and 0.5 V to 4.5 V. A sampling ADC is a data-conversion device that acquires an analog voltage with a sample-and-hold circuit and converts it into a digital value through successive approximation. The ADS7813 belongs to the SAR ADC hierarchy, where the conversion register compares the sampled input against a trial DAC value. This architecture is appropriate for instrumentation and industrial systems requiring deterministic conversion timing, serial output, and moderate conversion speed without a continuous clock. The ADS7813 integrates a complete 16-bit capacitor-based SAR converter, sample-and-hold circuitry, clock, reference, and serial interface. Its maximum conversion time is 20 µs, while its serial interface supports straightforward communication with embedded processors. Configurable input ranges provide flexibility for bipolar instrumentation signals and single-ended industrial sensor outputs, reducing the need for external range-switching hardware. Operation from a single +5 V supply simplifies system power architecture, and the low-power design supports battery-instrumented and space-constrained equipment. The converter is available in a 16-pin SOIC package, identified by TI ordering code DW, with an operating temperature range of −40 °C to +85 °C. Its 16-bit resolution provides 65,536 nominal code levels, making it useful for measurements requiring more precision than a typical 12-bit converter. Typical uses include industrial process measurement, laboratory data acquisition, sensor-interface modules, panel instrumentation, and embedded control systems. The serial interface helps reduce connection count, while selectable input ranges support bipolar sensor conditioning and unipolar transducer outputs. System designers must still account for input bandwidth, reference accuracy, source impedance, digital-interface timing, and analog noise when establishing achievable measurement precision. A practical design consideration is that the nominal 16-bit resolution does not guarantee 16-bit absolute accuracy. Reference-voltage error, offset, gain error, comparator behavior, input-source impedance, and PCB noise can reduce end-to-end accuracy. The manufacturer datasheet should be used to select grounding, decoupling, reference-capacitor, and analog-layout arrangements for the selected input range. This page consolidates verified manufacturer and distributor information, explicitly identified package and lifecycle details, practical ADI signal-chain companions, drop-in alternatives, and engineering guidance that are not presented as a substitute for the complete manufacturer datasheet. Pricing shown here reflects the verified distributor observation as of 2026-10-29.
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.
ADS7815U - 16-Bit 250 kSPS SAR ADC | Texas Instruments
The Texas Instruments ADS7815U is a 16-bit, 250 kSPS, single-channel SAR analog-to-digital converter with a single-ended input and parallel output interface, housed in a 28-pin SOIC (DW) package. It combines a 16-bit capacitor-based SAR converter, inherent sample-and-hold function, precision reference, and internal clock in one CMOS device. The ADC operates across -25°C to +85°C and is specified for 96 dB minimum SFDR and 84 dB minimum SINAD with a 100 kHz full-scale input. What is a SAR ADC? A successive-approximation-register analog-to-digital converter samples an analog input and determines each successive bit through repeated internal comparison and capacitor-DAC conversion. Unlike a pipeline ADC, this architecture generally combines lower power, lower cost, and direct conversion with useful resolution for instrumentation and industrial control. Within the broader semiconductor hierarchy, the ADS7815U is an ADC, a data-converter IC, and a signal-chain device used for precision measurement and digital control. The ADS7815U provides a throughput rate of 250 kSPS, 16-bit resolution, one single-ended analog channel, and an internal sample-and-hold, reference, and clock. Its stated dynamic performance includes 96 dB minimum SFDR and 84 dB minimum SINAD for a 100 kHz full-scale sine-wave input. These figures make the converter appropriate for systems requiring clean digitization of mid-frequency analog signals while retaining a straightforward parallel data path. Technically, the device uses a capacitor-based 16-bit SAR conversion stage and an inherent sample-and-hold network. The parallel interface exposes converted data without requiring a serial protocol, which can simplify connections to older microcontrollers, DSPs, FPGA logic, or data-capture systems. Because this is a parallel-output device, system-level design must address the 16-bit data bus, control signals, reference bypassing, analog-input conditioning, and timing margins around each conversion. Typical uses include industrial process measurement, laboratory instrumentation, sensor-interface modules, communications equipment, audio digitization, and embedded data-acquisition systems. Its 250 kSPS throughput is particularly relevant where the input bandwidth is limited but precision and deterministic conversion timing matter. The 96 dB SFDR figure indicates that harmonics can remain well below the fundamental for the specified 100 kHz test condition, while 84 dB SINAD describes combined noise-and-distortion performance. A primary design consideration is analog signal integrity. The input should be bandwidth-limited and referenced to the converter's single-ended input range, while supply and reference decoupling should be placed close to their associated pins. The parallel output timing and any required output buffering must also be checked against the host processor. Because the verified snippets do not provide the complete pin names or absolute input limits, designers should confirm those details in the Texas Instruments ADS7815 datasheet before layout release. This page consolidates the verified manufacturer and distributor facts for ADS7815U, compares same-package family alternatives, identifies missing pin-level and pricing information, and adds practical application and selection guidance that should be checked against the latest official datasheet.
ADS7816P - 12-Bit 200kHz SAR ADC | Texas Instruments
Texas Instruments ADS7816P is a 12-bit, 200 kHz sampling analog-to-digital converter with a differential input, synchronous serial interface, and low-power operation with automatic power-down, housed in an 8-pin plastic mini-DIP package. It accepts a 4.5 V supply and supports a reference voltage from 100 mV to 5 V, corresponding to output resolutions from 24 µV to 1.22 mV. A sampling ADC is a data-acquisition IC that samples an analog voltage at discrete instants and converts each sample into a digital code. The ADS7816P belongs to the SAR ADC family, a successive-approximation architecture that determines each output bit sequentially. Its 12-bit resolution supports 4096 digital codes, making it suitable for industrial monitoring, instrumentation, and systems that need modest measurement resolution at a relatively high sampling rate. The principal advantages are a 200 kHz sampling rate, a differential input architecture, and automatic power-down with only 3 µA maximum power-down current. The differential input can reject common-mode noise when the source is balanced around a midpoint. The synchronous serial interface provides a compact, deterministic connection to a controller, while automatic shutdown reduces consumption when conversions are infrequent. The 4.5 V operating supply is convenient for conventional 5 V industrial systems when suitable tolerances and bypass capacitors are used. The reference voltage defines the converter’s input range and least-significant-bit weight. With a 100 mV reference, one code represents approximately 24 µV; with a 5 V reference, one code represents approximately 1.22 mV. A small reference therefore improves sensitivity around a narrow signal range but also reduces full-scale headroom. Differential input voltage must remain within the device’s specified common-mode and full-scale limits, so the analog front end must be designed before selecting the reference range. Typical uses include factory process monitoring, temperature and pressure sensor acquisition, battery and power-system measurements, remote data acquisition, and isolated or noisy industrial environments where a differential input improves signal integrity. The synchronous serial interface also suits systems that need predictable sampling timing rather than a free-running parallel data bus. For these applications, reference accuracy, source impedance, and converter timing are as important as the nominal 12-bit resolution. The principal design consideration is analog signal conditioning. Keep the differential input traces short, route them away from switching circuitry, and follow the manufacturer’s input-capacitance recommendations. Provide stable supply and reference bypassing, verify the input common-mode range in the worst case, and account for source settling time between conversions. These practices help preserve the practical accuracy expected from a 12-bit converter. This page consolidates the core electrical characteristics, package information, design guidance, application examples, and sourcing structure for the ADS7816P, adding engineering-focused context to the manufacturer’s basic ordering and conversion data.
ADS7816U - 12-Bit 200 kHz Micropower ADC | Texas Instruments
Texas Instruments ADS7816U is a 12-bit, high-speed, micropower sampling analog-to-digital converter with a 200 kHz sampling rate, automatic power-down, a synchronous serial interface, and a differential analog input in an 8-pin SOIC package. Its reference voltage can vary from 100 mV to 5 V, producing a corresponding resolution range of 24 µV to 1.22 mV. A sampling ADC is a signal-conversion device that samples an analog voltage at a controlled rate and converts each sample into a digital value. The ADS7816 belongs to the SAR ADC hierarchy, where successive approximation converts the sampled voltage through a comparator and internal digital network. It is therefore a data converter IC used for precision measurement, signal capture, and embedded control rather than an amplifier, sensor, or digital communications transceiver. The main advantages of the ADS7816U are its 12-bit conversion resolution, 200 kHz throughput, differential input, and low-power operation. Automatic power-down limits the power-down current to 3 µA maximum. The manufacturer also identifies micropower operation at 12.5 kHz, making the converter suitable for systems that alternate between active conversion and low-power intervals. Its synchronous serial interface supports compact circuit implementations and straightforward connection to serial processors. The differential input structure is particularly useful when the measured signal requires rejection of common-mode noise. Engineers can use the two input pins to sample a voltage difference rather than relying on a single-ended node referenced to ground. The adjustable reference range allows the converter to be scaled for smaller signals, although the exact input range, offset, gain error, and noise specifications must be confirmed against the manufacturer datasheet before production design. Typical uses include industrial sensor acquisition, battery-powered measurement instruments, process-control loops, portable diagnostic equipment, and embedded systems that digitize low-to-moderate-bandwidth analog signals. The 200 kHz sampling rate is appropriate for continuous monitoring and control signals but not for high-frequency waveform capture requiring substantially greater sample rates. Design should include a clean reference source, suitable input conditioning, decoupling close to the supply and reference pins, and careful routing of the differential and serial signals. The reference voltage directly determines the conversion scale, while the difference between input and reference voltages must remain within the device's supported operating limits. Differential input filtering and guarding can help reduce errors from unequal source impedances. This page combines verified manufacturer and distributor information with practical application guidance, explicit data gaps, and a conservative drop-in alternative assessment. It distinguishes verified function and package compatibility from changes that still require board-level validation, providing more engineering context than a distributor listing alone.
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 - 12-Bit 200kHz Differential ADC | Texas Instruments
Texas Instruments ADS7817U is a 12-bit, 200 kHz sampling analog-to-digital converter with a high-impedance fully differential analog input. It accepts a reference voltage from 100 mV to 2.5 V, providing a corresponding input-referred resolution of 49 uV to 1.22 mV. The device is supplied in an 8-SOIC package for compact, surface-mount analog measurement designs. An ADC is an analog-to-digital converter, a data-acquisition IC that samples an analog voltage and converts it into a numeric code for processing or transmission. The ADS7817U belongs to the SAR ADC family, where successive-approximation conversion provides accurate measurement at relatively low power consumption. Its differential input structure supports measurement of the voltage difference between two analog nodes rather than measuring a single node relative to ground. Key features of the ADS7817U include 12-bit resolution, a 200 kHz sampling rate, a fully differential input, and automatic power-down. The reference range of 100 mV to 2.5 V allows the converter to be matched to low-amplitude sensor signals. The manufacturer describes the device as micropower and identifies differential input, low power, automatic power-down, and small size as central advantages for direct sensor-interface applications. The conversion performance is also supported by a serial interface suitable for embedded measurement systems. The serial output can be connected to a microcontroller or other digital controller for conversion and data processing. The differential input architecture is particularly useful when the source has a small signal amplitude and common-mode voltage varies, because the useful measurement is the difference between the two input nodes. Typical applications include industrial process measurement, battery and power-system monitoring, sensor signal acquisition, portable instrumentation, and low-power embedded control. The ADS7817U is appropriate when the design requires a compact, low-power SAR converter with a differential input and a selectable reference range. When laying out the circuit, use short, symmetrical analog traces and place the input and reference components close to the converter. Confirm the supply, reference, analog input, digital interface, and ground connections against the manufacturer datasheet before fabrication. Treat the differential input and reference network as precision signal paths rather than general-purpose routing.