ADC/DAC
Produtos (2518)
ADS1220IRVAR - 24-Bit 2kSPS Delta-Sigma ADC with PGA | Texas Instruments
The Texas Instruments ADS1220IRVAR is a 24-bit, 2-kSPS, four-channel, low-power delta-sigma analog-to-digital converter with integrated programmable gain amplifier (PGA), internal 2.048 V voltage reference, two matched programmable excitation current sources (IDACs), and an SPI-compatible serial interface, housed in a 16-pin VQFN (3.5 mm x 3.5 mm) package with exposed thermal pad. A delta-sigma ADC is a type of analog-to-digital converter that oversamples the input signal far above Nyquist and applies digital filtering to push quantization noise out of band, achieving very high resolution. It is the dominant architecture for precision sensor measurement (ADC -> data converter -> mixed-signal front end -> semiconductor). The ADS1220 sits in TI's precision ADC portfolio alongside the ADS1120 (lower channel count, similar feature set) and the ADS131M family (higher speed, simultaneous-sampling focus). Key features include a flexible input multiplexer supporting two differential or four single-ended inputs, a low-noise chopper-stabilized PGA with gains of 1, 2, 4, 8, 16, 32, 64, and 128, two matched programmable excitation current sources up to 1.5 mA for ratiometric RTD and thermistor measurements, a burnout current source for open-wire sensor detection, and a 2.048 V integrated reference with 10 ppm/C typical drift. The digital filter provides simultaneous 50 Hz and 60 Hz line-noise rejection at 20 SPS. Technically, the ADS1220 achieves up to 20 bits effective resolution at the maximum 2 kSPS data rate and up to 29.5 bits noise-free resolution at 20 SPS, using a third-order delta-sigma modulator followed by a configurable SINC digital filter. The SPI interface supports clock speeds up to 4.5 MHz with optional CRC packet checking for robust communication in electrically noisy industrial environments. Typical applications include RTD and thermocouple temperature measurement, bridge sensor (load cell, strain gauge) signal digitization, battery cell voltage monitoring, and portable instrumentation such as handheld multimeters, where its low quiescent current and high channel integration reduce both system size and energy budget. Design consideration: for ratiometric RTD designs, route the IDAC excitation current through the reference resistor so reference and ADC share the same supply drift; keep AVDD between 2.3 V and 5.5 V, decouple both AVDD and DVDD with 1 uF X7R ceramics placed within 5 mm of the pins, and ground the exposed thermal pad directly to the analog ground plane. This page synthesizes distributor pricing, drop-in alternative analysis, and practical design notes not found on the manufacturer datasheet, helping engineers select, source, and qualify the ADS1220IRVAR for production.
ADS122C04IRTER - 24-bit 2kSPS 4-ch Delta-Sigma ADC | Texas Instruments
The Texas Instruments ADS122C04IRTER is a precision 24-bit, 2-kSPS, 4-channel, low-power delta-sigma analog-to-digital converter housed in a 16-pin WQFN (3x3 mm) package. It integrates a low-noise programmable gain amplifier (PGA) with gains from 1 to 128, a low-drift internal voltage reference, two programmable excitation current sources (IDACs), an input multiplexer supporting two differential or four single-ended inputs, and an I2C-compatible interface capable of up to 1 Mbps. The device operates from a wide 2.3 V to 5.5 V supply and consumes only 315 uA (typical) in normal conversion mode. What is a delta-sigma ADC? A delta-sigma (sigma-delta) analog-to-digital converter is a type of data converter that uses a modulator loop and digital filtering to achieve very high resolution at lower sample rates, making it the dominant architecture for precision measurement of slowly varying sensor signals. Within the ADC taxonomy, it sits at: ADC > delta-sigma ADC > precision ADC > data converter > signal chain IC > semiconductor. The ADS122C04 specifically belongs to TI's precision, low-power ADC portfolio targeting bridge sensors, thermocouples, RTDs, and thermistors. Key differentiating features include 20 bits of effective resolution (noise-free bits depend on data rate and gain), simultaneous 50-Hz and 60-Hz line-cycle rejection, a 2.3-V to 5.6-V analog and digital supply range, and an extended -40C to +125C operating temperature range. The integrated IDACs simplify ratiometric measurements and can supply bias to resistive bridge sensors directly, eliminating external excitation circuitry. The device uses a switched-capacitor modulator with a digital SINC filter that delivers low total unadjusted error and excellent linearity, while two IDAC outputs are user-programmable from 10 uA to 1.5 mA. Two address pins allow up to 16 unique I2C addresses on a single bus, simplifying multi-channel PCB designs. Typical applications include weigh scales, strain-gauge sensor signal conditioning, industrial process control, temperature measurement with thermocouples or RTDs, and portable instrumentation. The integrated PGA and reference make the ADS122C04IRTER particularly well suited to direct bridge-sensor connection without front-end op-amps. Design consideration: the device's input multiplexer supports both bipolar (differential) and unipolar inputs; for thermocouples use the internal cold-junction compensation path and a separate dedicated temperature sensor. This page synthesizes distributor pricing from October 2026, parametric cross-reference data, and practical design notes that are not found in the standalone manufacturer datasheet.
ADS1245IDGSR - 24-Bit Delta-Sigma ADC, MSOP-10 | Texas Instruments
The Texas Instruments ADS1245IDGSR is a 24-bit, ultra-low-power delta-sigma analog-to-digital converter (ADC) with a high-impedance buffered input, housed in a 10-pin MSOP (DGS) package. Its buffered input presents 3 GΩ of input impedance, minimizing measurement errors when paired with high-impedance signal sources. The device operates from analog supplies of 2.5 V to 5.25 V and digital supplies of 1.8 V to 3.6 V, consuming only a few milliwatts in active conversion. What is a delta-sigma ADC? A delta-sigma (ΣΔ) ADC is a converter architecture that uses oversampling and noise-shaping to deliver very high effective resolution at low-to-moderate sampling rates. It belongs to the broader class of ADCs (SAR, pipeline, dual-slope, ΣΔ) used wherever precision DC measurements are required. Within the power-management and signal-chain hierarchy, the ADS1245IDGSR sits between a low-impedance analog sensor bridge and a microcontroller's serial interface, providing digital-free-of-low-frequency-noise conversion. Key features include 20-bit effective resolution, ±2.5 V differential input range, simultaneous 50 Hz and 60 Hz line-noise rejection, simple two-wire serial interface, and pin-compatibility with the ADS1244. The ADS1245 offers 0.0006% (typical) and 0.0015% (maximum) integral nonlinearity (INL), supporting demanding measurement accuracy requirements. The architecture is built around a third-order delta-sigma modulator followed by a digital filter that performs simultaneous 50 Hz/60 Hz mains rejection at the appropriate output data rates. The buffered input simplifies front-end signal conditioning by eliminating the need for external op-amps when interfacing directly to high-impedance sensors such as strain gauges, thermocouples, or electrochemical cells. Typical applications include precision temperature and pressure measurement, portable industrial weighing scales, weighing scales and load-cell conditioning, and process control instrumentation. The wide supply range also supports battery-powered handheld meters and 4-20 mA loop-powered industrial transmitters. When designing with this device, place the input bypass capacitors as close to the AVDD/DVDD pins as possible and avoid routing the analog signals near the digital serial clock lines, because even high-PSRR ADCs can couple switching transients into the analog front-end. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers select and qualify the part rapidly.
ADS1255IDBR - 24-Bit 30kSPS Low-Noise ADC | Texas Instruments
The Texas Instruments ADS1255IDBR is a 24-bit, 30kSPS, very-low-noise delta-sigma analog-to-digital converter with two selectable inputs and a 20-SSOP package. It accepts differential or single-ended measurements through its flexible input multiplexer. The converter combines a fourth-order delta-sigma modulator with a programmable digital filter to support demanding precision instrumentation. A delta-sigma ADC is a voltage-regulating feedback modulator followed by digital filtering and decimation. It trades a relatively simple analog input stage for high resolution, strong noise suppression, and flexible conversion rates. The ADS1255 belongs to the ADC/DAC category within broader data-converter, signal-processing, and semiconductor hierarchies. Verified headline features include 24-bit resolution, no missing codes, a maximum output rate of 30kSPS, fast channel cycling, differential or single-ended input support, and programmable-gain operation. According to the Texas Instruments ADS1255 datasheet, every data-rate and PGA setting provides noise-free resolution to 23 bits. The published maximum nonlinearity is ±0.0010%. Technically, the fourth-order delta-sigma modulator shapes quantization noise away from the signal band, while the programmable digital filter removes that shaped noise and averages samples. A serial interface configures the converter and transfers conversion results. This architecture favors low-noise measurement rather than very high instantaneous throughput. Typical uses include precision pressure and load-cell front ends, industrial transmitters, laboratory instrumentation, temperature measurement, low-level sensor acquisition, and communication equipment. Differential input is valuable when sensor leads can pick up noise or when the source has meaningful common-mode variation. Design the analog front end around the selected PGA, reference voltage, input range, and desired data rate. Keep input and reference routing compact, decouple supply rails near the device, and provide a clean low-noise ground strategy. SSOP lead pitch also demands careful solderability and inspection planning. This page consolidates verified manufacturer information, distributor availability, procurement data, and engineering guidance. It also separates exact sourced facts from parameters requiring design confirmation instead of filling unsupported values with assumptions.
ADS1256IDBR - 24-Bit 30kSPS Delta-Sigma ADC | Texas Instruments
The Texas Instruments ADS1256IDBR is a 24-bit, 30kSPS, very-low-noise delta-sigma analog-to-digital converter with four differential and eight single-ended inputs, a programmable gain amplifier, and factory automation and process-control capability. It is supplied in a 28-pin SSOP package. The converter combines a fourth-order delta-sigma modulator with a programmable digital filter, enabling high-resolution measurement from low-frequency industrial sensors. A delta-sigma ADC is an analog-to-digital converter category that uses oversampling, noise shaping, and digital filtering to achieve high resolution. The ADS1256 belongs to the broader hierarchy of ADC, data-converter IC, signal-conditioning IC, and analog semiconductor devices. Its sigma-delta architecture is especially useful when high precision and noise performance matter more than very high bandwidth. The verified product information identifies a 24-bit conversion resolution, data rates up to 30kSPS, four differential or eight single-ended input choices, integrated PGA functionality, and a 28-SSOP package. These characteristics make the device suitable for precision current, voltage, resistance, and sensor measurements where the input bandwidth is limited. The manufacturer product page positions the device for factory automation and process control. The integrated PGA supports conditioning of low-level sensor outputs before conversion, while the programmable digital filter helps reject out-of-band noise. The four-wire serial interface supports digital control and data transfer, although signal timing, clocking, reference selection, and filter configuration must be implemented according to the manufacturer datasheet. The part is identified as a 28-SSOP device and is not a power semiconductor, so SOA data are not applicable. Typical applications include pressure and temperature measurement, industrial process monitoring, load-cell signal acquisition, laboratory instrumentation, and low-bandwidth sensor interfaces. The 30kSPS maximum data output rate is useful for many measurement loops, but it does not make the ADC suitable for high-frequency waveform acquisition. Input filtering, grounding, reference stability, and digital timing remain important for achieving predictable results. For PCB implementation, use a clean analog supply and ground structure, place input and reference components close to the converter, and keep digital communication traces away from sensitive analog nodes. Review the manufacturer datasheet for the exact pin names, recommended input network, reference requirements, and timing limits. This page combines the verified manufacturer and distributor information with application guidance and transparent data-gap markers. The main engineering tradeoff is that the ADS1256 prioritizes high-resolution, low-noise delta-sigma measurement over high-speed conversion. It is a strong fit for slow, precise industrial signals, but a different ADC architecture may be preferable when sampling many high-frequency points or handling substantially wider bandwidth.
ADS1258-EP - 16-Channel 24-Bit ADC | Texas Instruments
The ADS1258-EP is an enhanced product (EP) version of the ADS1258, a 16-channel (multiplexed), low-noise, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) from Texas Instruments. It provides single-cycle settled data at channel scan rates from 1.8k to 23.7k samples per second (SPS) per channel. The device operates from a unipolar 5-V or bipolar ±2.5-V analog supply and a digital supply compatible with interfaces ranging from 2.7 V to 5.25 V. It is available in QFN-48 and QFP-48 packages, specifically the 48-HTQFP (7x7) and 48-VQFN (7x7) variants. An analog-to-digital converter (ADC) is a device that converts continuous analog signals into discrete digital numbers. The ADS1258-EP is a high-resolution, multiplexed ADC designed for precision measurement applications. It belongs to the family of delta-sigma ADCs, which use oversampling and noise shaping to achieve high resolution. In the hierarchy of data converters, it sits under the category of analog-to-digital converters, which are essential in mixed-signal systems for interfacing real-world analog signals with digital processing. Key features of the ADS1258-EP include a flexible input multiplexer that accepts combinations of eight differential or 16 single-ended inputs, with a full-scale differential range of 5 V or true bipolar range of ±2.5 V. The device offers a 24-bit resolution with low noise, making it suitable for high-precision measurement. The enhanced product (EP) designation indicates a wider operating temperature range and higher reliability, as noted in TI's E2E forum. The ADS1258-EP is designed for applications requiring high accuracy and speed, such as industrial process control, medical instrumentation, and test and measurement equipment. Technically, the ADS1258-EP uses a delta-sigma modulator followed by a digital filter, achieving single-cycle settling, which is critical for multiplexed systems where each channel must be read quickly. The device includes an internal oscillator and a programmable gain amplifier (PGA) with gains of 1, 2, 4, 8, 16, 32, and 64, allowing direct connection to a variety of sensors. The digital interface is SPI-compatible, enabling easy integration with microcontrollers and DSPs. Typical applications include multi-channel data acquisition systems, industrial automation, medical monitoring, and precision instrumentation. The wide input range and high resolution make it ideal for measuring temperature, pressure, and strain gauge signals. The ADS1258-EP's enhanced temperature range (-55°C to +125°C) ensures reliable operation in harsh environments. When designing with the ADS1258-EP, ensure proper decoupling of the analog and digital supplies, and use a low-noise reference voltage. The multiplexer switching can cause settling issues; therefore, the single-cycle settling feature is essential. Also, consider the input impedance and use appropriate anti-aliasing filters to maintain accuracy.
ADS1262 - 32-Bit 38-kSPS Delta-Sigma ADC with PGA | TI
The Texas Instruments ADS1262 is a low-noise, low-drift, 38.4-kSPS, 32-bit delta-sigma analog-to-digital converter (ADC) with an integrated programmable gain amplifier (PGA), internal 2.5-V low-drift bandgap reference, and internal fault monitors, packaged in a 28-pin TSSOP and fully specified from -40C to +125C. A delta-sigma ADC is a type of ADC that uses oversampling and noise shaping to achieve very high resolution and low noise, making it the dominant architecture for precision sensor measurement. Within the signal-chain hierarchy, the ADS1262 functions as a complete analog front end (AFE): sensor -> PGA -> delta-sigma modulator -> digital filter -> SPI interface, replacing discrete amplifier-plus-ADC chains. Key features include 32-bit resolution, a maximum data rate of 38.4 kSPS, an integrated PGA with gains from 1 to 32, a 2.5-V internal reference with buffered output, and internal fault monitors for open and shorted sensor detection. A flexible input multiplexer supports 5 differential or 10 single-ended inputs, and the digital filter offers programmable data rates and filter modes for trading resolution against speed. A temperature sensor and GPIOs further reduce external component count and system cost. The device uses a chopper-stabilized delta-sigma modulator with a precision digital filter, delivering low drift and low offset without costly external auto-zero circuitry. Compared with the older ADS1256, the integrated reference removes the need for a precise external reference such as the REF5025, simplifying PCB layout. The integrated fault monitors continuously check sensor wiring, improving system reliability in industrial environments. Typical applications include weigh scales and load cells, RTD and thermocouple temperature measurement, and industrial process control front ends, where microvolt-level signals demand the ADS1262's resolution and noise performance. Price data from DigiKey and Mouser as of 2026-08-30. Design tip: power the analog supply from a clean 5-V LDO, bypass the reference with a 10-uF capacitor, and place decoupling close to the pins to realize the datasheet noise floor.
ADS1262IPWR - 32-Bit 38-kSPS Delta-Sigma ADC | Texas Instruments
The Texas Instruments ADS1262IPWR is a 32-bit, 38.4-kSPS, low-noise delta-sigma (Sigma-Delta) analog-to-digital converter with an integrated programmable gain amplifier (PGA), voltage reference, and internal fault monitors, housed in a 28-pin TSSOP (PW) package. A delta-sigma ADC is a type of analog-to-digital converter that oversamples the input signal and applies digital filtering to achieve extremely high resolution, typically in the 24-bit to 32-bit class. Within the signal-chain hierarchy, the delta-sigma ADC sits between the analog front end (sensors, bridges) and the digital controller, and in this device the category is pushed further toward single-chip integration because the PGA and reference are built in, replacing several external precision components. Key features include 32-bit resolution with noise performance specified down to the nanovolt level at low data rates, an integrated PGA that amplifies small bridge and thermocouple signals directly, an on-chip low-drift voltage reference, and internal fault monitors for sensor diagnostics. The device is fully specified over the -40C to +125C industrial temperature range. Architecturally, the ADS1262 combines the delta-sigma modulator with programmable digital filtering, allowing trade-offs between output data rate (up to 38.4 kSPS) and noise. According to the TI ADS126x datasheet, the ADS1262 and ADS1263 family adds an auxiliary 24-bit delta-sigma ADC in the ADS1263 variant for background measurements, while both parts are pin and functionally compatible. Typical applications include weigh scales and load-cell front ends, factory automation and process-control analog inputs, and precision sensor measurement such as thermocouples and RTDs, where high accuracy and one-chip integration reduce board area and calibration effort. Design consideration: at the lowest data rates the device achieves its best noise floor, so select the output data rate and PGA gain together to match sensor sensitivity rather than defaulting to maximum speed. This page synthesizes distributor availability, drop-in family alternatives, and practical design guidance not consolidated in the manufacturer datasheet.
ADS1263 - 32-Bit 38-kSPS Delta-Sigma ADC | Texas Instruments
The Texas Instruments ADS1263 is a low-noise, low-drift, 38.4-kSPS, 32-bit delta-sigma (ΔΣ) analog-to-digital converter with an integrated programmable gain amplifier (PGA) up to 32x, a 2.5V internal reference, and internal fault monitors. It is available in a 28-pin TSSOP package and is fully specified over the -40C to +125C temperature range. A key differentiator is its integrated auxiliary 24-bit ΔΣ ADC for background measurements, making it a complete, one-chip measurement solution for demanding sensor applications. A delta-sigma ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve very high resolution and excellent noise performance. Within the data converter hierarchy (ADC -> precision ADC -> delta-sigma ADC), the ADS1263 sits at the top precision tier, essential in data acquisition systems, sensor interfaces, and instrumentation. The integrated PGA and reference reduce external component count and simplify system design. Key features include 32-bit resolution, a maximum data rate of 38.4 kSPS, 5 differential or 10 single-ended input channels, PGA gains up to 32, and a 2.5V internal reference. The single-cycle settling digital filter provides 130-dB rejection of 50-Hz and 60-Hz line interference, ideal for weigh scales and load cells. The device also integrates IDAC excitation currents, an internal ADC test signal, and 8x multiplexed GPIO. Architecturally, the ADS1263 combines a delta-sigma modulator with a digital filter, delivering high resolution at low noise. The PGA connects directly to low-level sensor signals, while fault monitors (sensor burnout, supply, and reference monitoring) enhance system reliability. The auxiliary 24-bit ADC runs background measurements such as cold-junction temperature sensing without interrupting main conversions. Communication is via SPI in 4-wire or 3-wire modes. Typical applications include weigh scales, load cells, strain gauges, temperature sensing (RTD/thermocouple with IDACs), and precision industrial process control, where the low noise and integrated features reduce board space and design complexity. Design tip: decouple analog and digital supplies carefully, select PGA gain to match the sensor full-scale range to maximize dynamic range, and use the single-cycle settling filter for multiplexed channel scanning to eliminate filter settling wait states.
ADS1274IPAPT - 24-Bit 144kSPS Quad Delta-Sigma ADC | Texas Instruments
The Texas Instruments ADS1274IPAPT is a 24-bit, 4-channel, simultaneous-sampling delta-sigma analog-to-digital converter with data rates up to 144 kSPS per channel, housed in a 64-pin HTQFP (PAP) 10x10 mm package with exposed thermal pad. It delivers 111 dB SNR in high-resolution mode, -108 dB THD, and 62 kHz usable bandwidth, combining wideband audio performance with industrial-grade DC accuracy. The device features a chopper-stabilized modulator architecture that achieves very low offset drift of 0.8 uV/°C while maintaining flat passband response. A delta-sigma ADC is a type of oversampling converter that uses a high-frequency modulator followed by digital filtering to achieve very high resolution. The ADS1274 belongs to the wider category of precision ADCs, which sit in the signal chain hierarchy of analog front end -> analog-to-digital conversion -> digital processing. It is specifically optimized for applications that demand both wide bandwidth and excellent DC stability, two characteristics that are traditionally mutually exclusive in sigma-delta designs. Key features include four simultaneously-sampled differential inputs, selectable operating modes (High-Resolution, Low-Power, High-Speed, and Audio), a flexible serial interface (SPI-compatible or frame-sync), and an internal PLL for clock generation from an external reference. The wideband digital filter delivers low passband droop, eliminating the need for post-equalization in frequency-sensitive applications such as vibration analysis. Architecturally, the ADS1274 employs a 4th-order chopper-stabilized modulator per channel with proprietary decimation filtering. This design eliminates the traditional trade-off between DC precision (low drift, high DC CMRR) and AC performance (wide bandwidth, flat passband), making the part suitable for multisensor systems where each channel must accurately capture both static and dynamic signals without per-channel calibration. Typical applications include industrial vibration monitoring, condition monitoring of rotating machinery, seismic data acquisition, multi-channel data loggers, audio test equipment, and power-quality analyzers. The simultaneous sampling architecture preserves phase relationships between channels, which is critical for modal analysis in structural health monitoring. When designing with the ADS1274IPAPT, pay attention to PCB layout: the exposed thermal pad must be soldered to a ground plane with multiple thermal vias to dissipate heat from the digital core, and the analog supply (AVDD) should be heavily decoupled with separate 10 uF bulk and 100 nF ceramic capacitors close to the pin. Use a low-jitter master clock for best noise performance at maximum data rate. This page synthesizes distributor pricing, parametric comparison tables, drop-in alternatives, and practical design notes not found on the standalone TI datasheet, helping engineers shorten the selection and qualification cycle for high-channel-count precision acquisition systems.
ADS127L11 - 24-Bit 400-kSPS Delta-Sigma ADC | Texas Instruments
The ADS127L11 is a 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) from Texas Instruments, offering data rates up to 400 kSPS with the wideband filter and up to 1067 kSPS with the low-latency filter. It combines excellent AC performance and DC precision with low power consumption of 18.6 mW in high-speed mode. The device integrates input and reference buffers to reduce signal loading and simplify front-end design. Available in a 20-pin TSSOP package (IPWR) and a 20-pin VQFN package (IRUKR), it operates over a wide supply range and is suitable for industrial, medical, and test and measurement applications. A delta-sigma ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution (typically 16 to 32 bits) with relatively low cost and power. It is part of the ADC family, which converts continuous analog signals into discrete digital values. Delta-sigma ADCs are widely used in precision measurement, audio, and industrial control where high resolution and low noise are critical. They differ from SAR ADCs in that they trade speed for resolution and often include digital filters for anti-aliasing. Key features of the ADS127L11 include a programmable digital filter (wideband or low-latency), a 24-bit resolution, and a maximum sample rate of 1067 kSPS. The device supports both SPI and frame-sync serial interfaces, and includes an internal reference buffer and input buffer. It offers a signal-to-noise ratio (SNR) of [DATA_NEEDED: SNR] dB and a total harmonic distortion (THD) of [DATA_NEEDED: THD] dB. The power consumption is 18.6 mW in high-speed mode, making it suitable for battery-powered and portable instruments. Technically, the ADS127L11 uses a fourth-order delta-sigma modulator with a digital decimation filter. The wideband filter provides a passband up to 0.45 × data rate, while the low-latency filter offers faster settling for multiplexed applications. The device includes a reference buffer that allows the use of external references with high impedance, and an input buffer that reduces the kickback from the switched-capacitor input stage. The ADC operates from a single 3.3V or 5V supply, with a digital I/O supply from 1.8V to 3.6V. Typical applications include vibration monitoring, industrial process control, medical instrumentation (e.g., EEG, ECG), and high-precision data acquisition systems. The high data rate and low latency make it ideal for closed-loop control and real-time monitoring. The integrated buffers simplify the analog front-end, reducing component count and board space. When designing with the ADS127L11, ensure proper decoupling of the AVDD and DVDD supplies, and use a low-noise reference. The input buffer requires a bias voltage, and the reference buffer should be bypassed with a capacitor. For best performance, keep the analog input traces short and shielded from digital noise.
ADS1286PAG4 - 12-bit 20kHz Micro Power SAR ADC | Texas Instruments
The Texas Instruments ADS1286PAG4 is a 12-bit, 20 kHz sampling analog-to-digital converter (ADC) with a differential input and integrated sample-and-hold amplifier that consumes only 250 µA of supply current. Housed in an 8-pin plastic DIP (PDIP-8) package, it operates from a single +5 V analog supply and communicates over an SPI/SSI-compatible two- or three-wire serial interface. The G4 designator indicates the device ships in tube packaging and is lead-free Pb-free, RoHS-compliant. An SAR (Successive Approximation Register) ADC is a type of Nyquist-rate data converter that uses a binary-weighted capacitor array and a comparator to converge on the analog input voltage in N clock cycles, where N is the resolution in bits. SAR ADCs occupy the middle ground between slow high-precision delta-sigma converters and flash ADCs; they deliver low latency (one conversion per cycle), deterministic throughput suitable for multiplexed acquisition, and modest power draw. The ADS1286PAG4 belongs to the broader hierarchy: ADC -> data converter -> data acquisition IC -> signal chain -> mixed-signal semiconductor. Key features include a guaranteed-no-missing-codes 12-bit transfer function, a 20 kHz maximum sampling rate, a 60 µs typical conversion time, only 250 µA of supply current during continuous conversion, and a low 0.0488 % linearity error (1 LSB). The differential input stage rejects common-mode noise on long analog runs, and the synchronous serial output minimizes MCU pin count. Operating temperature spans -40 °C to +85 °C, qualifying it for industrial-grade chassis-mount and remote-instrumentation designs. Architecturally, the ADS1286PAG4 combines a precision CMOS capacitor-DAC successive-approximation core with an on-chip clock and reference input path. Designers feed the reference from a stable 5 V rail (or an external low-drift reference) and digitize true-differential or single-ended bipolar signals up to ±VREF. The serial data frame is MSB-first, allowing direct hand-off to microcontrollers, FPGAs, or DSPs without glue logic. Typical applications include portable instrumentation, remote battery-powered data loggers, industrial process-control analog front ends, hand-held multimeters, and transducer/sensor signal conditioning where low power and small PCB area are required. Choose the ADS1286PAG4 when you need 12-bit precision at moderate speed from a single 5 V rail with deterministic conversion latency. Design tip: place the 0.1 µF supply bypass capacitor within 5 mm of the VDD pin and route the differential analog traces as a tightly-coupled pair to maximize common-mode rejection. The ADS1286PAG4 is pin-compatible with several 8-pin PDIP ADC descendants from the same TI family, simplifying PCB reuse across product variants.
ADS1286U - 12-Bit 20kHz Micro Power ADC | Texas Instruments
The Texas Instruments ADS1286U is a 12-bit, 20 kHz micro-power sampling analog-to-digital converter (ADC) with a differential input, integrated sample-and-hold amplifier, and a high-speed SPI/SSI-compatible serial interface, housed in an 8-pin SOIC package. The device draws only 250 uA of supply current, operates from a single 4.5 V to 5.25 V supply, and guarantees no missing codes across the full temperature range. An analog-to-digital converter is a mixed-signal integrated circuit that converts a continuous-time, continuous-amplitude analog signal into a discrete digital code. The ADS1286 belongs to the successive-approximation-register (SAR) ADC product family within the broader signal-chain taxonomy that includes sigma-delta, pipeline, and flash converters. SAR ADCs are favored for low-power, single-shot, and multiplexed data-acquisition tasks because they offer deterministic latency, compact silicon area, and inherently low power consumption compared with higher-resolution delta-sigma parts. Key specifications of the ADS1286U include 12-bit resolution, a 20 kHz maximum sampling rate, an integral non-linearity of +/-1 LSB (max), and a SINAD of 72 dB. The differential input stage accepts a +/-Vref full-scale range (typically 0 V to 5 V single- or 5 V differentially) and is preceded by a sample-and-hold that eliminates the need for an external front-end amplifier in most applications. The serial interface is clock-synchronized and supports two- or three-wire operation with an external serial clock rate up to 4 MHz, easing isolation between the converter and the host microcontroller. Architecturally, the ADS1286 uses a charge-redistribution SAR core with a thin-film laser-trimmed input scaling network; this topology yields the very low 250 uA quiescent current while preserving 12-bit DC accuracy. The internal reference loop is designed for use with an external 2.5 V or 5 V reference, and the device does not include an on-chip reference. The wide-input-range CMOS input structure simplifies sensor-bridge and thermocouple front ends. Typical end-use applications for the ADS1286U include battery-powered instrumentation, remote data loggers, isolated industrial sensors, portable medical devices, and handheld meters. Its tiny 8-pin SOIC footprint and 250 uA supply current make it especially attractive for loop-powered 4-20 mA transmitters and other energy-harvested nodes where every microamp matters. A practical design consideration is the addition of an anti-aliasing RC filter ahead of the analog inputs: a 1 kohm/10 nF single-pole filter is sufficient for a 20 kHz Nyquist boundary. Decouple VDD with a 0.1 uF ceramic placed within 5 mm of the supply pin. This page synthesizes distributor pricing, verified drop-in alternatives, and practical layout notes not found on generic catalog summaries.
ADS1286U/2K5G4 - 12-Bit 20kHz Micropower SAR ADC | TI
The Texas Instruments ADS1286U/2K5G4 is a 12-bit, 20 kHz successive-approximation analog-to-digital converter (SAR ADC) with a differential input and integrated sample-and-hold amplifier, packaged in an 8-pin SOIC (0.154", 3.90 mm width) and consuming only 250 µA of supply current. It supports a single-ended or differential analog input over a 0 V to 5.3 V range and a 5 V nominal supply, providing SPI/SSI-compatible two- or three-wire serial communication for microcontroller, FPGA, or DSP hosts. This micropower combination of low supply current and a 20 kSPS sample rate makes it well suited to battery-powered and isolated data-acquisition front ends. A successive-approximation ADC (often abbreviated SAR ADC) is a type of data-conversion IC that walks an internal capacitive DAC from MSB to LSB each conversion cycle, producing a low-latency, deterministic sample output with no pipeline delay. SAR ADCs are widely used when a system needs a clean single-shot sample with simple control, low standby current, and modest resolution - they sit between slower sigma-delta ADCs (which trade latency for higher resolution) and flash ADCs (which trade power for speed). Within a system, the SAR ADC is positioned just after analog signal conditioning and ahead of a digital controller that consumes the conversion result. Key features include guaranteed no missing codes at 12 bits, 20 kHz maximum sampling rate, 250 µA typical supply current, an SPI/SSI-compatible serial interface, a single 5 V supply, and an industrial -40 °C to +85 °C operating temperature range. The 8-SOIC footprint and two-wire serial interface simplify board layout and reduce MCU pin overhead in space-constrained designs. The architecture combines an input sample-and-hold with a charge-redistribution SAR core and a precision internal reference path, giving deterministic latency of one conversion cycle and the absence of pipeline or integration delay. Because the digital interface is a simple shift-register readout, the part is straightforward to drive from virtually any microcontroller with an SPI peripheral. Typical applications include remote sensor data acquisition, isolated analog front ends, battery-powered instrumentation, industrial process-control transducers, and portable medical accessory boards. The DIP and SOIC footprints also support hand-soldered prototype or through-hole-style retrofit boards. When designing the analog front end, take care to bypass VDD with a 0.1 µF ceramic close to the pin and to keep the analog input traces short and guarded, since the 12-bit, 20 kSPS converter will expose any added noise or reference drift directly in the conversion result. This page consolidates distributor pricing, pin-compatible drop-in alternatives, and practical design guidance not found in the standalone manufacturer datasheet.
ADS1286UC/2K5 - 12-Bit 20kHz Micro-Power SAR ADC | Texas Instruments
The Texas Instruments ADS1286UC/2K5 is a 12-bit, 20 kHz successive-approximation analog-to-digital converter (SAR ADC) with a differential input and integrated sample-and-hold amplifier, supplied in an 8-pin SOIC package and tape-and-reel packaging. According to the TI ADS1286 datasheet, the device consumes only 250 µA of supply current, supports an SPI/SSI-compatible serial interface (two- or three-wire), and guarantees no missing codes across the full operating range. The differential input and 0-5 V analog input range make it well suited to bridge-sensor, transducer, and battery-monitoring front-ends where ground-loop rejection matters. An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that uses a binary search algorithm and an internal DAC to resolve an analog input one bit per clock cycle. SAR ADCs sit within the broader hierarchy: ADC → data converter → mixed-signal IC → semiconductor. Compared to delta-sigma ADCs, SAR converters offer deterministic latency, no pipeline delay, and lower power consumption at sample rates up to a few MSPS, which is why they remain the workhorse for multiplexed data-acquisition systems and motor-control current sensing. Key differentiating specifications include 12-bit resolution with no missing codes, 20 kHz maximum sample rate, 250 µA quiescent supply current, and a wide single-supply operating range (typically 4.5 V to 5.25 V). The integrated differential input eliminates the need for external instrumentation amplifiers in many sensor-conditioning paths, and the synchronous serial interface allows direct connection to microcontrollers and DSPs without glue logic. Architecture-wise, the ADS1286 combines a capacitive-charge-distribution DAC, a high-gain comparator, and an SAR control logic block. A single conversion cycle takes 16 internal clock periods, with the sample-and-hold acquiring on the falling edge of CS and conversion starting on the rising edge. The device requires an external reference voltage and an external serial clock, keeping the analog front-end compact and predictable. Typical applications include portable instrumentation, weigh scales, remote sensors, process-control loops, and battery-powered data loggers. Industrial-grade temperature range (-40 °C to +85 °C) and the small SOIC-8 footprint suit it to space-constrained embedded designs. A primary design consideration is the input common-mode range, which must stay within the supply rails; for true bipolar signals, consider a true bipolar-input ADC such as the ADS1287 family. The /CS pin doubles as the conversion-start trigger, so firmware timing must respect the 16-clock conversion window to avoid corrupted results. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ADS1286UK/2K5 - 12-Bit 20kHz Micro Power SAR ADC | Texas Instruments
The Texas Instruments ADS1286UK/2K5 is a 12-bit, 20 kHz successive-approximation-register (SAR) analog-to-digital converter with a differential input and on-chip sample-and-hold, supplied in an 8-pin SOIC (D) package. Operating from a single 4.5 V to 5.25 V analog supply, the device draws only 250 µA typical supply current, integrating low-power conversion with a synchronous serial (SPI/SSI-compatible) data interface. An SAR ADC is a precision converter that uses a binary-weighted capacitor array and a comparator to perform a bit-by-bit decision against the analog input during each conversion cycle. SAR converters sit in the data-converter IC family, which also includes delta-sigma, pipeline, and dual-slope architectures; SAR parts are valued for deterministic latency, single-shot accuracy, and low power, which makes them well suited to multiplexed sensor readout, industrial monitoring, and battery-powered instrumentation. Within TI's converter portfolio, the ADS1286 occupies the micropower SAR niche where sample rate and channel count are modest but quiescent current is critical. Key specifications include 12-bit no-missing-codes resolution, a 20 kHz maximum sample rate, differential analog input, an external reference (VREF), an integrated sample-and-hold amplifier, and SPI/SSI-compatible two- or three-wire serial output. The part is specified across the -40 °C to +85 °C industrial temperature range and supports an 8-SOIC footprint that is pin-compatible with several legacy and current TI 8-pin ADC and DAC devices, enabling board-level reuse. According to the Texas Instruments ADS1286 datasheet, the device includes an active-low CS (chip-select, falling-edge frame) and an SCLK-driven bit clock, with DOUT changing on the falling SCLK edge to simplify glueless MCU interfacing. Typical applications include portable and battery-powered sensor digitizers, transducer and bridge-sensor signal conditioning, industrial process-control analog front ends, isolated-data-acquisition modules, and replacement of legacy 12-bit ADC subsystems. The 250 µA supply current makes the part especially attractive for loop-powered 4-20 mA transmitters and remote data loggers where standby current dominates battery life. When designing, place the 0.1 µF VDD bypass capacitor as close as possible to pin 8 and keep the analog/digital ground return paths short; a clean external reference is mandatory for full 12-bit accuracy, and the SOIC-8 footprint allows standard reflow profiles.
ADS1292RIPBS - 2-Ch 24-Bit AFE Biopotential ECG | Texas Instruments
The Texas Instruments ADS1292RIPBS is a 2-channel, 24-bit, simultaneous-sampling analog front-end (AFE) for biopotential measurements, integrating a low-noise programmable gain amplifier (PGA), a delta-sigma analog-to-digital converter (ADC), an internal reference, and an onboard oscillator in a 32-pin TQFP (PBS) 5x5 mm package. The 'R' suffix indicates the integrated respiration impedance measurement function alongside the two ECG/EMG channels, and the part is rated for 740 uW typical power consumption at 1 kSPS. An analog front-end (AFE) is a mixed-signal subsystem that conditions low-amplitude physiological signals (typically 1 uV to 5 mV) and digitizes them so a host processor can run diagnostic algorithms. In the hierarchy of medical electronics, AFEs sit between the electrode/sensor interface and the digital signal controller (DSC) or microcontroller, replacing the discrete instrumentation amplifier plus separate 16-/24-bit ADC approach with a single qualified, low-power IC. The ADS1292 family is optimized for electrocardiogram (ECG), electromyography (EMG), and electroencephalography (EEG) front-end designs where low input-referred noise and high common-mode rejection are mandatory for diagnostic accuracy. Key features include 2 high-resolution 24-bit delta-sigma ADCs with simultaneous sampling up to 8 kSPS per channel, integrated PGA gains from 1 to 12, an integrated respiration modulation/demodulation circuit, a 2.7 V to 5.25 V analog supply range, a 1.8 V to 3.6 V digital I/O supply, and a flexible SPI-compatible serial interface. The device provides right-leg drive (RLD) signal generation hardware, lead-off detection comparators, and an internal oscillator that eliminates the external crystal requirement in cost-sensitive wearable designs. Architecturally, the ADS1292 uses a chopper-stabilized input front-end combined with a 4th-order delta-sigma modulator and a multi-bit digital decimation filter to achieve input-referred noise in the microvolt range while drawing sub-milliwatt quiescent current. The integrated respiration channel uses a high-frequency AC excitation source and synchronous demodulator to extract breathing impedance without an external analog multiplier IC. Typical applications include wearable fitness and heart-rate monitors, single-lead and multi-lead ECG patches, patient-side telemetry modules, sports and EMG rehabilitation devices, and bioimpedance-based sleep monitors. The wide supply range supports both single-cell Li-ion battery designs (3.7 V nominal) and USB-powered diagnostic instruments (5 V bus). When designing with this device, ensure the analog and digital ground planes are joined at a single point under the IC exposed pad, place the 1 uF, 0.1 uF, and 10 uF decoupling capacitors as close as possible to AVDD and DVDD pins, and route the right-leg drive (RLD) amplifier output through a feedback network sized for the patient-electrode return path to maximize common-mode rejection at 50/60 Hz mains frequencies.
ADS1298CZXGT - 8-Ch 24-Bit ECG AFE, 64-NFBGA | Texas Instruments
The Texas Instruments ADS1298CZXGT is a low-power, 8-channel, 24-bit analog front-end (AFE) for biopotential measurements, integrating eight simultaneously-sampling delta-sigma analog-to-digital converters (ADCs) with built-in programmable gain amplifiers (PGAs), reference voltage, and an on-board oscillator in a 64-pin NFBGA (ZXG) 8x8 mm package. The device delivers 14.1 mW total power dissipation while providing 24-bit resolution across all eight channels, with a maximum data rate of 32 kSPS per channel and 8 kSPS in high-resolution mode, optimized for clinical electrocardiogram (ECG), electromyography (EMG), and electroencephalography (EEG) acquisition systems. An analog front-end (AFE) for biopotential measurements is a highly integrated signal-chain block that combines low-noise amplification (typically via a PGA), anti-alias filtering, and high-resolution sigma-delta conversion directly at the sensor interface. AFEs sit above general-purpose ADCs in the signal-chain hierarchy - they replace the traditional discrete chain of instrumentation amplifier + filter + ADC with a single IC, reducing board area, noise, and design complexity. The ADS1298 family in particular adds integrated right-leg drive (RLD) amplifiers, lead-off detection, Wilson central terminal (WCT) generation, and pace detection, making it a complete biopotential AFE rather than a generic ADC. Key features include eight simultaneously-sampling 24-bit sigma-delta ADCs, integrated PGA gains from 1 to 12 V/V, a low input-referred noise of approximately 4 uVPP at 150 Hz BW (gain = 6), selectable data rates from 500 SPS to 32 kSPS, built-in right-leg drive amplifier, lead-off detection, and a flexible SPI-compatible serial interface. The on-chip 2.5 V reference and internal oscillator reduce external component count, while the integrated pace-detection circuitry supports three-channel pace pulse detection for Holter and patient-monitoring equipment. The device uses a switched-capacitor delta-sigma modulator architecture per channel, followed by a digital decimation filter, achieving high common-mode rejection (>100 dB at 50/60 Hz) and excellent dynamic range for small biopotential signals (typically 1-5 mV ECG amplitude). The digital filter chain supports simultaneous 50 Hz / 60 Hz line rejection, simplifying international product compliance. The 64-ball NFBGA package has a thermal resistance of approximately 32 C/W and supports the commercial 0 C to +70 C operating range specified for the CZXGT suffix. Typical applications include 12-lead clinical ECG monitors, portable patient telemetry, Holter recorders, brain-computer interfaces (EEG), sports and fitness ECG wearables, and instrumentation-grade EMG systems. The eight-channel density also suits multi-modal acquisition boards combining ECG, respiration (impedance pneumography), and pulse oximetry front-end channels on a single chip. When designing with this AFE, pay close attention to PCB layout: keep the analog input traces short and guarded, place the 2.2 uF decoupling capacitors immediately adjacent to each AVDD pin, and avoid routing digital SPI traces near the analog inputs to preserve the >100 dB CMRR. Use the integrated right-leg-drive amplifier to reduce common-mode pickup rather than relying on external instrumentation amplifiers. This page synthesizes XAIPART distributor pricing, drop-in same-package alternatives from TI's ADS129x family, and practical layout notes for medical biopotential designs that the manufacturer datasheet alone does not provide.
ADS1298IPAG - 8-Ch 24-Bit ECG AFE, 14.1mW | Texas Instruments
The Texas Instruments ADS1298IPAG is a low-power, 8-channel, 24-bit simultaneous-sampling delta-sigma analog-to-digital converter with integrated biopotential (ECG/EEG) front-end, packaged in a 64-pin TQFP (PAG, 10x10 mm). It integrates eight low-noise programmable gain amplifiers (PGAs), eight 24-bit ADCs, an internal reference, and an onboard oscillator, and dissipates 14.1 mW total (approximately 0.75 mW per channel) at full data rate. An analog front-end is the signal-conditioning and conversion stage placed between analog physiological sensors and a digital host processor. In the broader component taxonomy, the ADS1298IPAG is an AFE -> data converter (ADC) -> mixed-signal IC -> semiconductor. Delta-sigma ADCs use oversampling and noise shaping to achieve very high resolution (24-bit) at the cost of absolute input bandwidth, making them the standard choice for low-frequency, high-precision biopotential measurements where microvolt-level signals must be resolved in the presence of large DC offsets and 50/60 Hz line interference. Key features of the ADS1298IPAG include 4 uVPP input-referred noise (at 150 Hz bandwidth with gain = 6), 200 pA input bias current, built-in right-leg drive (RLD) amplifier, on-chip Wilson central terminal (WCT) generator for 12-lead ECG derivation, internal lead-off detection, and a flexible SPI-compatible serial interface. Eight channels are sampled simultaneously, eliminating skew between leads in multi-channel ECG/EMG recordings. The device operates from a unipolar analog supply of 2.7 V to 5.5 V (AVDD) and a digital I/O supply of 1.65 V to 3.6 V (DVDD). Its input common-mode range and high CMRR (typical > -100 dB) allow direct connection to skin electrodes without external instrumentation amplifiers. The integrated PGA offers gains from 1 to 12, supporting sensor signals ranging from sub-millivolt EEG to several-millivolt EMG. Typical applications include 12-lead clinical ECG monitors, portable patient telemetry, Holter recorders, EEG/EMG front-ends, evoked-potential biopotential acquisition, sleep-stage monitors, and bioimpedance research accessories. When using this device, ensure the unused channels are tied to AVDD (not GND) to prevent ESD paths from injecting noise; place AVSS and DGND ground returns as a star ground near the IC; and bypass AVDD/AVSS with 10 uF + 0.1 uF ceramic pairs within 5 mm of the pins.
ADS1299-6PAG - 6-Ch 24-Bit Low-Noise AFE for EEG/Biopotential | TI
The Texas Instruments ADS1299-6PAG is a 6-channel, 24-bit, low-noise, simultaneous-sampling delta-sigma analog-to-digital converter (ADC) with an integrated programmable gain amplifier (PGA), internal reference, and onboard oscillator, housed in a 64-pin TQFP (PAG) package measuring 10x10 mm. It is part of the ADS1299-x family of 4-, 6-, and 8-channel AFEs designed for high-resolution biopotential measurements and delivers input-referred noise of 1 uVPP at 70 Hz bandwidth, CMRR of -110 dB, and a data rate from 250 SPS to 16 kSPS. The integrated PGA offers programmable gains of 1, 2, 4, 6, 8, 12, and 24, allowing direct connection to low-amplitude electrodes without external instrumentation amplifiers. A biopotential analog front end (AFE) is a specialized mixed-signal IC that combines low-noise amplification, multi-pole analog filtering, and high-resolution digitization in a single chip, replacing the traditional discrete chain of instrumentation amp + anti-alias filter + ADC. In the broader system hierarchy, an AFE sits at the signal-chain boundary between the analog sensor domain (electrodes, transducers) and the digital processing domain (MCU/DSP/FPGA). The ADS1299-6 specifically addresses extracranial electroencephalogram (EEG), electrocardiogram (ECG), electromyography (EMG), and brain-computer interface (BCI) applications where the combination of sub-uV noise floor, high common-mode rejection, and simultaneous multi-channel sampling is mandatory. Key features include 1 uVPP input-referred noise at 70 Hz BW, -110 dB CMRR, programmable gain from 1 to 24 in 7 discrete steps, internal 4.033 V reference, internal oscillator, and daisy-chain capability for high channel-count systems. The device supports SPI-compatible serial communication and consumes approximately 33 mW total, with a flexible right-leg drive (RLD) loop per channel for bias electrode driving. The 64-TQFP package provides ample thermal headroom for portable multi-channel designs. Architecturally, the ADS1299-6 uses a third-order delta-sigma modulator per channel followed by a digital SINC filter chain, achieving simultaneous sampling by sharing a common DRDY signal. The integrated PGA front-end, matched with the modulator's low-noise input stage, allows the device to resolve signals in the sub-uV range critical for EEG micro-features. Internal calibration and self-test routines plus a dedicated bias amplifier streamline biopotential front-end designs. Typical applications include clinical-grade EEG headsets, research-grade BCI platforms, polysomnography, ECG/EMG patient monitors, evoked-potential instrumentation, and bioimpedance research front-ends. The simultaneous-sampling architecture preserves inter-channel phase relationships required for source localization and coherence analysis in neuroscience research. When designing with this part, careful PCB layout of the analog ground plane, dedicated low-noise LDO rails for AVDD/AVSS, and proper patient-electrode bias return are essential to realize the 1 uVPP noise specification. Use the daisy-chain interface when extending beyond 6 channels by stacking additional ADS1299-x devices on the same SPI bus. This page synthesizes distributor stock, drop-in cross-reference options, and practical biopotential design considerations not found in the manufacturer datasheet alone, accelerating your EEG/BCI/biomedical product development.
ADS1299IPAGR - 8-Ch 24-Bit AFE for EEG/Biopotential | Texas Instruments
The Texas Instruments ADS1299IPAGR is a low-noise, 8-channel, 24-bit, simultaneous-sampling delta-sigma analog-to-digital converter (ADC) with a built-in programmable gain amplifier (PGA), internal reference, and onboard oscillator, packaged in a 64-pin TQFP (PAG, 10x10 mm). It offers 8 differential input channels, a maximum data rate of 16 kSPS per channel, and an input-referred noise of approximately 0.5 uVpp (gain = 24), making it the highest-performance member of the TI biopotential AFE family. An analog front end (AFE) is an integrated circuit that combines a low-noise analog signal chain (typically PGA, filters, and ADC reference) with the digitizing converter on a single die. The ADS1299 belongs to the broader hierarchy of mixed-signal data converters, then successive-approximation or delta-sigma ADCs, and finally precision measurement ICs that interface directly with low-amplitude physiological sensors. By integrating the biasing, lead-off detection, and right-leg drive drivers required for EEG/ECG/EMG, the AFE reduces the external component count compared to a discrete ADC-plus-op-amp solution. Key features include a PGA with gains from 1 to 24 in 7 steps, internal 4.5 V low-drift reference (30 ppm/C typical), internal oscillator, and selectable SPI-compatible serial interface. Input common-mode rejection exceeds 110 dB at 60 Hz, and the integrated bias amplifier supplies patient or subject bias in active electrode circuits. Power consumption is approximately 42 mW per channel with all channels active, while a flexible power-down mode reduces current to microamp levels for wearable battery-powered applications. Architecturally, the device uses a chopper-stabilized, multi-bit delta-sigma modulator per channel followed by a digital decimation filter. This topology achieves the very low input-referred noise necessary for sub-microvolt biopotential signals while suppressing 1/f and mains interference. The internal reference and oscillator eliminate two critical external components that typically drift across temperature in discrete designs. Typical applications include electroencephalography (EEG) headsets, polysomnography and sleep monitoring, electrocardiography (ECG/Holter) patient monitors, electromyography (EMG) prosthetics, brain-computer interfaces (BCI), and electrophysiology research instrumentation. In EEG systems the part's CMRR and noise floor allow detection of microvolt-scale cortical signals without complex shielding. When designing with the ADS1299, place the device on a four-layer PCB with a continuous analog ground plane, route the analog inputs as guarded differential pairs, and use a clean low-noise LDO such as the TPS7A4701 for AVDD to preserve noise performance. Always refer to the manufacturer datasheet and the ADS1299 evaluation module (ADS1299EEGFE-PDK) reference design for layout guidance.
ADS131E08SPAGR - 8-Ch 24-Bit 64-kSPS Delta-Sigma ADC | TI
The Texas Instruments ADS131E08SPAGR is a multichannel, simultaneous-sampling, 24-bit, delta-sigma analog-to-digital converter (ADC) delivering data rates up to 64 kSPS on eight channels, packaged in a 64-pin TQFP (PAG, 10x10 mm) and specified from -40C to +105C. Power consumption is a low 17.6 mW. An analog front-end (AFE) is a circuit block that conditions and digitizes analog signals before digital processing. Within the signal-chain hierarchy (delta-sigma ADC -> analog front-end -> data acquisition system -> signal chain), the ADS131E08S is a complete AFE that integrates eight delta-sigma converters, programmable gain amplifiers (PGAs), an internal voltage reference, and an internal oscillator in a single IC, drastically reducing the component count of multi-channel data acquisition systems. Key features include 24-bit resolution across eight simultaneous channels, a 64 kSPS maximum sample rate, differential or pseudo-differential inputs, an SPI serial interface, and a fast power-up/start-up time. Simultaneous sampling is essential for power monitoring because phase relationships between voltage and current channels must be preserved for accurate power calculations. Architecturally, each channel uses a delta-sigma modulator with an internal digital decimation filter, providing noise shaping and high resolution at moderate bandwidth. The fast start-up specification enables quick power-on to valid conversion data, which is critical for protection relays that must detect and respond to faults within milliseconds. The integrated PGA allows direct connection of sensors with varying output levels without external amplification. Typical applications include grid protection relays, power quality analyzers, energy metering, and industrial motor monitoring, where eight synchronized channels capture three-phase voltage and current waveforms. The 1.8V digital / 5V analog supply configuration fits standard industrial rails. Design consideration: decouple the analog and digital supplies independently and maintain a single, quiet ground plane; isolate the SPI bus when it crosses to noisy digital domains to preserve the specified noise floor. Price data as of 2026-08-30.
ADS131M08 - 8-Ch 24-Bit 32kSPS Delta-Sigma ADC | TI
The Texas Instruments ADS131M08 is an eight-channel, simultaneously-sampling, 24-bit delta-sigma (ΔΣ) analog-to-digital converter (ADC) offering wide dynamic range, low power, and energy-measurement-specific features. Housed in a 32-pin TQFP (PBS, 5x5 mm) package, it suits energy metering, power metrology, and circuit breaker applications. A delta-sigma ADC oversamples the input signal and applies digital filtering to achieve very high resolution, making this converter category the dominant choice for precision measurements such as power metering. Within the signal-chain hierarchy, the ADS131M08 sits between analog front-end conditioning (resistor dividers, current transformers, shunts) and the digital MCU that processes energy computations. Key features include eight simultaneously sampling differential inputs, programmable output data rate up to 32 kSPS, and programmable gain up to 128. Noise performance is 102-dB dynamic range at gain = 1 and 4 kSPS, and 80-dB dynamic range at gain = 64 and 4 kSPS. The device integrates a low-drift internal voltage reference, allowing ADC inputs to interface directly to resistor-divider networks or current-sensing elements without external precision references. The simultaneous-sampling architecture is critical for polyphase energy metering: all eight channels convert at the same instant, preserving phase relationships between voltage and current channels needed for accurate active, reactive, and apparent power calculations. The ADS131M08 is AEC-Q100 qualified (temperature grade 1, -40C to +125C ambient) and Functional Safety-Capable, with documentation available to support functional safety system design, enabling automotive and industrial metering use. Typical applications include three-phase smart energy meters, power quality analyzers, protective relay and circuit breaker monitoring, and solar inverter MPPT sensing. In a bidirectional interleaved buck-converter reference design, TI pairs the ADS131M08 with a C2000 MCU for precise current and voltage control. Design tip: at gain = 64 the input-referred noise rises, so size shunt resistance and gain together to balance dynamic range against full-scale headroom.
ADS131M08IPBS - 8-Ch 24-Bit 32kSPS Delta-Sigma ADC | TI
The Texas Instruments ADS131M08IPBS is an eight-channel, simultaneously-sampling, 24-bit delta-sigma (ΔΣ) analog-to-digital converter (ADC) with a programmable output data rate up to 32 kSPS and programmable gain up to 128, housed in a 32-pin TQFP (5x5 mm) package. A delta-sigma ADC oversamples the analog input and applies digital decimation filtering to reach very high resolution, which makes this converter family the dominant architecture for precision power and metrology sensing. Within the signal-chain hierarchy, the ADS131M08 sits between front-end conditioning (resistor dividers or current transformers, which its inputs can directly interface to) and a host MCU communicating over its serial interface. Key features include eight simultaneously sampling differential inputs, a programmable output data rate up to 32 kSPS, and a programmable gain amplifier with settings up to 128. Noise performance is 102-dB dynamic range at gain = 1 (4 kSPS) and 80-dB dynamic range at gain = 64 (4 kSPS), enabling direct connection to shunt resistors and current transformers without external amplification in many designs. Energy-measurement-specific features reduce external component count in metering front ends. The architecture uses a delta-sigma modulator per channel with digital filter and decimation stages, plus a serial interface with CRC options for robust communication. Because all eight channels sample at the same instant, phase relationships across channels are preserved - critical for three-phase power calculations. An automotive variant, the ADS131M08QPBSRQ1, is AEC-Q100 qualified for temperature grade 1 and functional-safety-capable with supporting documentation. Typical applications include three-phase energy meters, protective relays and circuit breakers, solar inverter and power metrology systems, and motor drive current/voltage sensing. In a bidirectional interleaved buck converter reference design, TI pairs the ADS131M08 with a C2000 MCU for precise power-stage control. Design tip: because all channels sample simultaneously, external network tolerances (divider ratio, shunt value) dominate inter-channel accuracy - budget external precision accordingly rather than relying on ADC matching alone. This page synthesizes distributor pricing, drop-in same-family alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet alone.