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ADS1213U - 22-Bit, 6.25 kSPS Delta-Sigma ADC | Texas Instruments
ADS1213U

ADS1213U - 22-Bit, 6.25 kSPS Delta-Sigma ADC | Texas Instruments

Texas Instruments ADS1213U is a 22-bit, 6.25 kSPS, 8-channel delta-sigma analog-to-digital converter with a programmable gain amplifier, internal reference, and SPI-compatible SSI interface, packaged in a 24-pin SOIC. The converter supports four differential or eight single-ended input channels through its integrated input multiplexer, making it suitable for precision industrial measurement systems that require multiple sensor inputs and high resolution. A delta-sigma ADC is a signal-conversion IC that uses oversampling, digital filtering, and noise shaping to exchange conversion speed for high resolution and noise performance. The ADS1213U belongs to the ADC/DAC category within the broader data-converter and signal-processing hierarchy. Its architecture is intended for low-bandwidth industrial signals where 22-bit nominal resolution can improve measurement fidelity without requiring a high-speed successive-approximation ADC. Key features include 22-bit conversion resolution, a maximum data rate of 6.25 kSPS, differential inputs, a programmable gain amplifier, an internal voltage reference, and a flexible synchronous serial interface. The verified data also identifies 20-bit effective resolution at 10 Hz and 16-bit effective resolution at 1000 Hz. Operation from a single +5 V supply and a stated low-power figure of 1.4 mW align the device with embedded measurement systems that must balance precision, conversion speed, and energy use. The integrated four-channel input multiplexer supports analog-front-end designs that would otherwise require external analog switching. The programmable gain stage can condition low-level sensor outputs before conversion, while the delta-sigma conversion path suppresses out-of-band noise. The SPI-compatible SSI interface and two-wire control mode described by Texas Instruments simplify host communication and can reduce isolated-system implementation complexity when appropriately designed. Typical uses include pressure and temperature transmitters, industrial process monitoring, strain-gauge and bridge-sensor acquisition, laboratory instrumentation, and low-speed data loggers. Its 6.25 kSPS maximum rate favors continuous sensor monitoring rather than waveform capture or high-speed motor-control feedback. Systems requiring several channels can also multiplex analog inputs around the converter while retaining programmable gain and synchronized serial output. Designers should account for the conversion-time penalty associated with delta-sigma filtering, verify the input common-mode range at every programmable-gain setting, and follow the manufacturer’s reference layout and decoupling recommendations. The integrated reference and programmable gain simplify the analog front end, but sensor excitation, protection, grounding, and digital-interface isolation still require careful implementation. This page consolidates verified manufacturer and distributor details, practical application guidance, parameter comparisons, and drop-in replacement information. It also distinguishes the verified ADS1213U from ordering-code or package variants that are not confirmed as pin-compatible substitutes.

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ADS1217 - 8-Channel 24-Bit Delta-Sigma ADC | Texas Instruments
ADS1217

ADS1217 - 8-Channel 24-Bit Delta-Sigma ADC | Texas Instruments

The ADS1217 is a precision, wide dynamic range, delta-sigma analog-to-digital converter (ADC) with 24-bit resolution, designed for high-resolution measurement applications. It operates from a 2.7V to 5.25V supply and provides up to 24 bits of no missing code performance with an effective resolution of 22 bits. The device features eight multiplexed input channels, an internal programmable gain amplifier (PGA) with gains from 1 to 128, and a flexible serial interface. It is available in a 48-pin TQFP package (PFB) and is manufactured by Texas Instruments. A delta-sigma ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution. It is part of the ADC family, which converts analog signals into digital data for processing by microcontrollers or DSPs. Delta-sigma ADCs are known for their excellent linearity and low noise, making them ideal for precision measurement applications where accuracy is critical. Key features of the ADS1217 include 24-bit no missing codes, INL of 0.0012% of FSR (max), full-scale input of ±2VREF, and a PGA with gains from 1 to 128. It offers 22 bits of effective resolution at PGA=1 and 19 bits at PGA=128. The device supports single-cycle settling mode and programmable data output rates up to 1kHz. It also includes an on-chip 1.25V/2.5V reference, reducing external component count. Technically, the ADS1217 uses a delta-sigma modulator followed by a digital filter, achieving high resolution through oversampling. The multiplexed inputs allow multiple sensors to be connected, and the PGA amplifies small signals before conversion, improving dynamic range. The device includes an internal buffer that can be selected to provide high input impedance, simplifying sensor interfacing. Typical applications include smart transmitters, industrial process control, weigh scales, chromatography, and portable instrumentation. Its high resolution and low noise make it suitable for precision measurement systems where accuracy is paramount. The wide input range and programmable gain allow it to handle a variety of sensor outputs. When designing with the ADS1217, ensure proper decoupling of the analog and digital supplies and use a clean reference voltage. The PGA gain setting should be chosen to maximize dynamic range while avoiding saturation. The serial interface allows easy connection to microcontrollers, and the single-cycle settling mode is useful for multiplexed applications.

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ADS1220 - 24-Bit Low-Power ADC with PGA | Texas Instruments
ADS1220

ADS1220 - 24-Bit Low-Power ADC with PGA | Texas Instruments

The ADS1220 is a precision, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) from Texas Instruments, designed for low-power, high-resolution measurement of small sensor signals. It integrates a programmable gain amplifier (PGA), a voltage reference, two programmable current sources, and a temperature sensor, significantly reducing system cost and component count. The device operates from a 2.3 V to 5.5 V supply and consumes as low as 120 μA in duty-cycle mode, making it ideal for battery-powered and loop-powered applications. It is available in a leadless VQFN-16 or a TSSOP-16 package and is specified over a temperature range of -40°C to +125°C. An analog-to-digital converter (ADC) is an electronic component that converts continuous analog signals into discrete digital values, enabling microcontrollers and digital processors to interpret real-world physical quantities such as temperature, pressure, and strain. The ADS1220 belongs to the family of delta-sigma ADCs, which use oversampling and noise shaping to achieve high resolution (24 bits) and excellent noise performance. Within the signal chain hierarchy, the ADS1220 sits between the sensor and the digital host, often following a signal conditioning stage and preceding a microcontroller or DSP. Its integrated PGA and reference eliminate the need for external precision components, simplifying the design and improving overall accuracy. Key features of the ADS1220 include a programmable gain from 1 V/V to 128 V/V, programmable data rates up to 2 kSPS, and up to 20 bits of effective resolution. It supports two differential or four single-ended inputs, and includes a 2.048 V reference with low drift. The device also provides simultaneous 50-Hz and 60-Hz rejection, which is critical for industrial applications where power-line noise is prevalent. The integrated temperature sensor and current sources enable direct RTD and thermocouple measurements without additional circuitry. Technically, the ADS1220 uses a delta-sigma modulator followed by a digital filter, achieving high accuracy with minimal external components. The PGA allows small sensor signals to be amplified before conversion, improving signal-to-noise ratio. The device communicates via a 4-wire SPI interface, and includes a data-ready (DRDY) pin for synchronization. The low-power architecture, combined with a wide supply range, makes it versatile for both portable and industrial designs. Typical applications include temperature measurement with RTDs and thermocouples, pressure and load-cell sensing, 4-20 mA loop-powered transmitters, and portable instrumentation. The ADS1220's low power consumption and integrated features make it particularly well-suited for field transmitters and battery-operated devices where power efficiency is critical. When designing with the ADS1220, ensure proper decoupling of the AVDD and DVDD supplies, and place the reference bypass capacitor close to the REFP/REFN pins. The PGA gain and data rate settings should be chosen to balance resolution and speed for the specific sensor bandwidth. For best noise performance, use a low-noise reference and minimize digital switching noise near the analog inputs.

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ADS1220IPWR - 24-Bit 2kSPS Delta-Sigma ADC | Texas Instruments
ADS1220IPWR

ADS1220IPWR - 24-Bit 2kSPS Delta-Sigma ADC | Texas Instruments

The Texas Instruments ADS1220IPWR is a 24-bit, 2-kSPS, four-channel, low-power delta-sigma analog-to-digital converter with an integrated programmable gain amplifier (PGA), voltage reference, SPI interface and two programmable excitation current sources (IDACs), housed in a 16-pin TSSOP package rated from -40C to +125C. A delta-sigma ADC is a type of analog-to-digital converter that oversamples the input signal and applies digital filtering to achieve very high resolution, making it the dominant architecture in the precision data-converter hierarchy (ADC -> precision ADC -> sigma-delta ADC -> data converter) for measuring small sensor signals. Where successive-approximation (SAR) ADCs favor speed, delta-sigma converters favor noise-free resolution, which is why they dominate sensor front ends. Key features of the ADS1220 include a flexible input multiplexer supporting two differential or four single-ended inputs, a low-noise PGA that reduces system component count, two integrated matched IDACs for ratiometric 3-wire and 4-wire RTD measurements, and an on-chip reference that eliminates external reference circuitry. The integration of PGA, VREF and IDACs in a small TSSOP-16 footprint is the part's central value proposition: TI positions it explicitly as a way to reduce system cost and bill-of-materials count in small-signal sensor applications. Architecturally, the device combines the delta-sigma modulator with a programmable digital filter, allowing trade-offs between output data rate (up to 2 kSPS) and noise performance. The SPI-compatible serial interface provides data reads, register configuration, and a DRDY output for deterministic cycle timing, simplifying interfacing with any MCU, including TI MSP430 and other low-power hosts. Typical applications include RTD and thermocouple temperature measurement, bridge sensors such as load cells and pressure sensors, battery monitoring, and portable industrial instrumentation where low power and small size matter. Design consideration: use the two IDACs with a precision reference resistor to build ratiometric RTD front ends; this cancels IDAC drift from the measurement, but budget the PGA headroom so IDAC compliance voltage plus sensor drop stays within the supply. This page synthesizes distributor pricing, drop-in alternatives, pinout, design notes and comparison data not consolidated in the manufacturer datasheet.

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ADS1220IRVAR - 24-Bit 2kSPS Delta-Sigma ADC with PGA | Texas Instruments
ADS1220IRVAR

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.

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ADS122C04IRTER - 24-bit 2kSPS 4-ch Delta-Sigma ADC | Texas Instruments
ADS122C04IRTER

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.

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ADS1240E - 24-Bit, 4-Channel Delta-Sigma ADC | TI
ADS1240E

ADS1240E - 24-Bit, 4-Channel Delta-Sigma ADC | TI

Texas Instruments ADS1240E is a 24-bit, four-channel delta-sigma analog-to-digital converter rated for 30 samples per second, operating from 2.7 V to 5.25 V in a 24-SSOP package. It combines a programmable-gain amplifier, four analog inputs, an SPI-compatible serial interface, and eight configurable GPIO pins for precision measurement systems. A delta-sigma ADC is a data-converter category that uses oversampling, noise shaping, and digital filtering to obtain high resolution from low-frequency or near-DC signals. The ADS1240E belongs to the broader ADC > delta-sigma ADC > precision data-converter hierarchy and is designed for sensors whose useful bandwidth is much lower than the converter's sampling capability. Its 24-bit no-missing-code operation and 21-bit effective resolution support accurate measurement of small signals from bridges, strain gauges, thermocouples, and industrial transducers. Key features include programmable PGA gains from 1 through 128, 0.0015% integral nonlinearity, and simultaneous 50 Hz and 60 Hz rejection of at least 90 dB. Single-cycle settling helps reduce the time required to establish each conversion result. The SPI-compatible serial interface and up to eight configurable I/O pins simplify connection to microcontrollers, programmable logic, and dedicated industrial controllers while supporting alarm, excitation, and digital control functions. The converter uses a delta-sigma architecture to trade conversion speed for resolution and noise performance. At a 30-SPS data rate, the architecture is appropriate for slow sensor signals rather than waveform sampling. The programmable PGA accepts low-level inputs while reducing the signal range that must be resolved by the converter. Select the gain, data rate, digital filter configuration, and input reference according to the sensor output range, common-mode voltage, required update rate, and rejection of line-frequency interference. Typical uses include smart transmitters, industrial process-control loops, electronic weight scales, chromatography systems, portable instrumentation, pressure measurement, and low-level bridge excitation. The four-input architecture allows multiple sensor channels to share the converter when each can meet the settling time, common-mode range, and filtering requirements of the selected configuration. For layout, keep analog input and reference traces short, place input filtering and decoupling capacitors close to their associated pins, and use a quiet ground return for the converter. A solid ground plane and separation from switching nodes reduce coupling into the high-resolution front end. Verify the reference voltage, common-mode limits, input filtering, and digital interface timing before committing the PCB layout. This product record combines manufacturer specifications with practical guidance for sensor measurement design, application selection, interface planning, and replacement evaluation. It also identifies same-footprint alternatives and clearly distinguishes drop-in options from devices that would require a different package or redesigned analog interface.

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ADS1241E - 24-Bit 30-SPS 8-Channel ADC | Texas Instruments
ADS1241E

ADS1241E - 24-Bit 30-SPS 8-Channel ADC | Texas Instruments

Texas Instruments ADS1241E is a 24-bit, 30-SPS, 8-channel delta-sigma analog-to-digital converter with a programmable gain amplifier in a 28-pin SSOP package. It combines high-resolution conversion, multiple analog inputs, and an SPI-compatible serial interface for precision measurement systems. The manufacturer identifies the ADS1241 and ADS1241E for smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation. A delta-sigma ADC is a type of analog-to-digital converter that uses oversampling and digital filtering to convert continuously varying analog voltages into high-resolution digital codes. Within the broader semiconductor hierarchy, the ADS1241E is an ADC, then a data-converter IC, then an integrated circuit used for precision signal acquisition. Its 24-bit resolution and 30-SPS conversion rate target applications that need accurate measurement without exceptionally high sample throughput. The ADS1241E provides eight analog input channels, a programmable gain amplifier, and an SPI-compatible serial interface. The PGA supports conditioning of low-level sensor signals before conversion, while the 24-bit converter architecture is intended to preserve fine measurement detail. According to the Texas Instruments product page, up to eight bits of data I/O can also be supplied for input or output, expanding its usefulness for hardware control functions beyond primary data acquisition. The 28-pin SSOP package suits compact industrial and instrumentation boards where analog input density matters more than the footprint of a high-lead-count package. The verified distributor listing identifies the ADC as a 24-bit, eight-input, single sigma-delta converter, while the manufacturer describes the family as a 24-bit, 30-SPS, eight-channel device with a PGA. The operating temperature range reported by the LCSC listing is -40°C to +85°C. Typical implementation places the ADS1241E between sensors or conditioning networks and a digital controller. Suitable systems include smart transmitters, process-control instrumentation, precision weighing equipment, chromatography data acquisition, and portable measurement products. SPI-compatible communication allows the converter to connect to a microcontroller while keeping the analog front end isolated from the digital control section. Designers should verify the complete electrical limits, pin functions, recommended application circuit, reference requirements, and digital-interface timing in the manufacturer datasheet before layout. Component placement, analog grounding, reference-voltage stability, and filtering directly affect a precision ADC, so the verified 24-bit resolution should not be treated as useful system accuracy without a complete error budget. This page distinguishes documented capabilities from parameters that still require detailed datasheet review.

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ADS1245IDGSR - 24-Bit Delta-Sigma ADC, MSOP-10 | Texas Instruments
ADS1245IDGSR

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.

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ADS1250U - 20-Bit, 25 kSPS Sigma-Delta ADC | Texas Instruments
ADS1250U

ADS1250U - 20-Bit, 25 kSPS Sigma-Delta ADC | Texas Instruments

Texas Instruments ADS1250U is a 20-bit, single-channel, delta-sigma analog-to-digital converter with a maximum data rate of 25 kSPS, an effective resolution of 18 bits, and a 16-pin SOIC (DW) package. It operates from a single +5 V supply and uses a serial interface for transferring converted data. An analog-to-digital converter converts an analog input voltage into a digital value suitable for measurement, control, and signal-processing systems. The ADS1250U belongs to the delta-sigma ADC hierarchy within data-converter ICs. Its delta-sigma architecture is intended for precision measurement applications requiring wide dynamic range, high resolution, and effective conversion rates up to 25 kSPS without missing output codes under the stated operating conditions. The primary performance features are 20-bit nominal resolution, 18-bit effective resolution, and 2.8 ppm RMS noise at conversion rates up to 25 kSPS. The device supports one analog input and provides a broad dynamic range for precision acquisition systems. Its single +5 V supply requirement simplifies system-level power planning compared with converters that require separate analog and digital rails. The converter combines an input stage, delta-sigma modulator, digital filter, and serial data interface within one integrated circuit. Digital filtering suppresses out-of-band noise and shapes the frequency response, while the serial interface reduces the number of signal connections required compared with a parallel ADC. Conversion rate, data readiness, and operating mode are managed through the device interface, allowing the acquisition system to balance measurement speed against resolution and filtering requirements. Typical uses include precision industrial instrumentation, pressure and load-cell measurement, low-level sensor acquisition, laboratory data logging, and embedded measurement systems. It is especially appropriate when 20-bit conversion resolution is useful but a high-speed SAR ADC is unnecessary. The 25 kSPS ceiling also allows the converter to handle slowly changing sensor outputs and multiplexed analog channels when the required settling time permits. A critical design consideration is analog signal conditioning. The ADC performance depends on a low-noise reference, properly decoupled supply rails, controlled grounding, and an input source capable of driving the selected conversion rate. Follow the pin-description and application-circuit tables in the manufacturer datasheet when assigning tracks, selecting bypass capacitors, and establishing the digital interface. This page combines the Texas Instruments product characteristics, package information, sourcing context, and practical selection guidance. It also distinguishes true same-footprint alternatives from broader ADC options so engineers can identify when a board-level replacement is technically defensible.

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ADS1251U - 24-Bit 20kHz Low-Power Delta-Sigma ADC | Texas Instruments
ADS1251U

ADS1251U - 24-Bit 20kHz Low-Power Delta-Sigma ADC | Texas Instruments

The Texas Instruments ADS1251U is a 24-bit, 20kHz low-power delta-sigma analog-to-digital converter with one differential input, 19-bit effective resolution, and a single +5V supply. The converter is housed in an 8-pin SOIC package and is designed for precision measurement systems requiring high resolution, wide dynamic range, and no missing-code performance. An analog-to-digital converter converts an analog input voltage into a digital value. Delta-sigma ADCs belong to the broader semiconductor and data-converter hierarchy, combining an analog input stage, sigma-delta modulator, digital filter, and serial interface. The ADS1251U adds differential input capability, which helps reject common-mode interference when measuring small sensor signals referenced to a shared analog ground. The device provides 24-bit resolution with no missing codes and achieves 19-bit effective resolution at conversion rates up to 20kHz. Its stated noise performance is 1.5ppm RMS, while the input nonlinearity is 15ppm maximum. An external 5V reference supports accurate ratio measurements, and a flexible two-wire synchronous serial interface is suitable for low-cost isolation and communication with microcontrollers. The delta-sigma architecture prioritizes resolution and noise performance over conversion latency. Filtering, decimation, and programmable data rates make the ADS1251U appropriate for precision instrumentation rather than high-bandwidth waveform capture. The SYNC and power-down functions provide additional control for synchronized acquisition and low-duty-cycle systems. Typical uses include industrial pressure and temperature acquisition, precision bridge measurement, low-frequency sensor interfaces, and isolated instrumentation. The differential input can be connected to the output of suitable bridge or sensor circuitry, while the digital interface communicates conversion results to an embedded controller. Designers should provide a stable 5V reference, verify the analog input range around the selected reference voltage, and account for digital-filter settling time after changing data rate or synchronization conditions. Reference and analog-ground layout should minimize thermal gradients and coupling from switching circuitry. This page combines the verified manufacturer and distributor specifications with pinout guidance, commercial availability information, compatible-family alternatives, and practical design notes. It is intended to help engineers identify the correct ADC, validate electrical compatibility, and plan a precise, low-noise measurement implementation.

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ADS1252U - 24-Bit 40kHz Sigma-Delta ADC | Texas Instruments
ADS1252U

ADS1252U - 24-Bit 40kHz Sigma-Delta ADC | Texas Instruments

Texas Instruments ADS1252U is a 24-bit, 40 kSPS sigma-delta analog-to-digital converter with one differential input, operated from a single +5 V supply and housed in an 8-pin SOIC package. The converter provides wide dynamic range and no-missing-code performance, with an effective resolution of 19 bits, equivalent to 2.5 ppm RMS noise, for conversion rates up to 40 kHz. Its precision architecture is intended for measurement systems that require high resolution without the complexity and switching noise of a high-speed SAR ADC. What is a sigma-delta ADC? A sigma-delta analog-to-digital converter uses a delta-sigma modulator and digital decimation filtering to oversample the analog input and shape quantization noise. The ADS1252U is therefore a precision ADC in the broader semiconductor hierarchy: data converter > analog-to-digital converter > sigma-delta ADC. Its 24-bit nominal resolution, 19-bit effective resolution and differential input support are useful for low-bandwidth industrial instrumentation where signal amplitude and resolution matter more than maximum sampling rate. Key features include 24-bit resolution, operation up to 40 kHz, one differential input and a single +5 V supply. The manufacturer describes the device as providing no missing codes across its 24-bit conversion range, while the 2.5 ppm RMS noise specification identifies it as a high-resolution measurement converter rather than a general-purpose flash or SAR ADC. The SPI-compatible serial interface and external clock arrangement provide a straightforward connection to microcontrollers, DSPs and programmable logic. The ADS1252U is suited to precision current sensing, pressure transducer acquisition, strain-gauge measurement, industrial process monitoring and low-frequency sensor instrumentation. Differential input handling helps reject common-mode noise when the measured source is balanced or when the analog front end uses a differential amplifier. The 40 kSPS maximum conversion rate is appropriate for many industrial control and monitoring loops, but it is not intended for high-frequency waveform capture. Designers should pay close attention to analog input common-mode range, reference voltage, input filtering, clock jitter and layout grounding. The analog and digital sections should be separated thoughtfully, and the datasheet reference and bypass connections should be placed according to the manufacturer layout guidance. External filtering can limit bandwidth and reduce out-of-band delta-sigma modulation noise before the digital decimation stage. This product page consolidates the verified manufacturer specifications, observed distributor pricing, sourcing information and practical design guidance. It also distinguishes the confirmed ADS1252U ordering information from broader functional alternatives, helping engineers avoid treating a merely similar ADC as a guaranteed pin-to-pin replacement.

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ADS1253E - 24-Bit 20-kSPS 4-Channel Delta-Sigma ADC | Texas Instruments
ADS1253E

ADS1253E - 24-Bit 20-kSPS 4-Channel Delta-Sigma ADC | Texas Instruments

Texas Instruments ADS1253E is a precision 24-bit delta-sigma analog-to-digital converter with four differential inputs, a maximum conversion rate of 20 kSPS, and a 16-SSOP package. It operates from a single +5 V supply and combines a wide input dynamic range with a no-missing-codes 24-bit conversion architecture. The device achieves 19-bit effective resolution at conversion rates up to 20 kSPS, corresponding to 1.8 ppm RMS input-referred noise. Its differential inputs support precise measurement of low-level sensor, bridge, and process-control signals while rejecting common-mode noise. A delta-sigma ADC is a category of data-converter IC that uses oversampling, digital filtering, and noise shaping to provide high resolution and excellent dynamic range. The ADS1253E belongs to the broader analog-to-digital converter, data-acquisition IC, and signal-chain semiconductor hierarchy. Compared with a SAR ADC operating at comparable conversion rates, this architecture favors precision measurement over very high throughput, making it appropriate for sensor instrumentation, industrial monitoring, and laboratory data acquisition. The ADS1253E provides 24-bit nominal resolution, 19-bit effective resolution at 20 kSPS, four differential input channels, and 1.8 ppm RMS noise. An integrated four-input multiplexer allows one converter core to service multiple analog sources. The device also includes an external reference input, power-down mode, and synchronization support. These features let a compact design acquire several low-level channels while controlling power and coordinating conversion timing with external equipment. Its delta-sigma conversion stage uses continuous-time sampling and digital filtering to trade conversion latency for noise performance and selectivity. A four-input differential multiplexer precedes the converter, allowing paired positive and negative analog inputs to be selected for conversion. The 20 kSPS rate is suitable for pressure, temperature, load-cell, chemical, and process-control signals that require high resolution but do not require megahertz sampling. The 1.8 ppm RMS noise specification supports stable measurements when the input-referred noise must remain well below the signal of interest. Typical applications include industrial pressure and flow measurement, strain-gauge and load-cell instrumentation, temperature sensing, laboratory measurement systems, and multichannel data-acquisition boards. The four differential inputs reduce the number of external converters needed when several sensors share a common reference. Synchronization support can also help align measurements across multiple converters when coordinated acquisition is required. Design the analog input network to preserve the converter’s differential performance. Keep input traces short, use a low-noise reference, provide local supply bypassing, and ensure source impedances are balanced across differential pairs. Confirm the required data rate, digital filter settling time, input range, and clock configuration with the manufacturer datasheet before fixing the system sampling schedule. External reference and input filtering components should be selected for the required bandwidth and noise target. This product record combines the ADS1253E conversion specifications, package details, application guidance, and replacement considerations into an engineering-oriented reference. It also distinguishes verified same-package family options from converters that require a different footprint, helping designers evaluate PCB reuse without confusing functional similarity with true drop-in compatibility.

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ADS1254E - 24-Bit 4-Channel 20-kSPS ADC | Texas Instruments
ADS1254E

ADS1254E - 24-Bit 4-Channel 20-kSPS ADC | Texas Instruments

Texas Instruments ADS1254E is a 24-bit, 20-kSPS, four-channel delta-sigma analog-to-digital converter with separate AVDD and DVDD supplies, supplied in a 20-pin SSOP (DBQ) package. It provides four differential inputs, 19-bit effective resolution at 20 kSPS, low noise of 1.8 ppm, and maximum integral nonlinearity of 15 ppm. The converter supports an external reference, power-down operation, synchronization, and a low-power 20-kSPS operating mode. A delta-sigma ADC is a type of analog-to-digital converter that uses oversampling, digital filtering, and noise shaping to achieve high resolution and wide dynamic range. The ADS1254E belongs to the precision ADC hierarchy and is intended for industrial measurement systems requiring accurate conversion of low-bandwidth analog signals. Its differential inputs are suited to bridge sensors, strain-gauge measurements, and instrumentation-amplifier outputs. The principal features include a 24-bit conversion word without missing codes, four selectable differential input channels, and a maximum data rate of 20 kSPS. Effective resolution reaches 19 bits at that rate, while 1.8-ppm noise and 15-ppm maximum INL support precision measurements. Separate analog and digital supply domains help isolate sensitive analog circuitry from digital switching and interface loads. Internally, the device combines a precision delta-sigma conversion stage with programmable digital filtering and a synchronous serial interface. Synchronization permits coordinated sampling when multiple converters must acquire related analog signals. Power-down mode reduces consumption when measurements are not continuously required, while the low-power mode retains the stated 20-kSPS conversion capability. Typical applications include precision pressure and force measurement, industrial process monitoring, low-frequency data acquisition, laboratory instrumentation, and strain-gauge sensor interfaces. Four differential channels reduce the need for separate converter packages when several sensor outputs must be measured under common control. PCB design should keep analog input routing short, provide local bypass capacitance at AVDD and DVDD, and use a clean grounding strategy that minimizes converter digital-return current beneath sensitive analog traces. The external reference and input network must also be checked for thermal drift, settling time, and overdrive before choosing component values. This product page consolidates the verified manufacturer and distributor information, separates confirmed specifications from unavailable parameters, and provides practical guidance for evaluating the ADS1254E and its same-family drop-in alternatives.

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ADS1255IDBR - 24-Bit 30kSPS Low-Noise ADC | Texas Instruments
ADS1255IDBR

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.

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ADS1256IDBR - 24-Bit 30kSPS Delta-Sigma ADC | Texas Instruments
ADS1256IDBR

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.

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ADS1258-EP - 16-Channel 24-Bit ADC | Texas Instruments
ADS1258-EP

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.

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ADS1262 - 32-Bit 38-kSPS Delta-Sigma ADC with PGA | TI
ADS1262

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.

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ADS1262IPWR - 32-Bit 38-kSPS Delta-Sigma ADC | Texas Instruments
ADS1262IPWR

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.

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ADS1263 - 32-Bit 38-kSPS Delta-Sigma ADC | Texas Instruments
ADS1263

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.

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ADS1274IPAPT - 24-Bit 144kSPS Quad Delta-Sigma ADC | Texas Instruments
ADS1274IPAPT

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.

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ADS127L11 - 24-Bit 400-kSPS Delta-Sigma ADC | Texas Instruments
ADS127L11

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.

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ADS1286P - 12-Bit 20kHz Micropower ADC | Texas Instruments
ADS1286P

ADS1286P - 12-Bit 20kHz Micropower ADC | Texas Instruments

Texas Instruments ADS1286P is a 12-bit, 20kHz micropower sampling analog-to-digital converter with a differential input, sample-and-hold amplifier, and 250 uA supply current. The device uses an SPI- or SSI-compatible serial interface over a two-wire or three-wire connection and is packaged in an 8-pin PDIP. It is intended for low-power signal acquisition where compact conversion, differential input handling, and low supply demand are important. A sampling ADC belongs to the analog-to-digital converter hierarchy, which converts continuous analog voltages into digital data for measurement, control, and communication systems. The ADS1286P combines a successive-approximation-style sampling architecture with an integrated sample-and-hold stage. Its differential input can measure the voltage difference between two analog nodes, which helps reject common-mode interference when paired with suitable input filtering and reference design. The 12-bit conversion resolution provides 4096 digital codes, while the 20kHz sampling rate supports acquisition of relatively high-frequency analog signals. Low 250 uA supply-current demand makes the converter appropriate for battery-operated instruments, portable monitoring equipment, and remote sensor nodes. Its serial interface reduces the number of signal lines required between the converter and a host controller. The internal sample-and-hold amplifier acquires the differential input before conversion, simplifying the front-end signal path. Because accuracy and noise performance depend on reference and input conditioning, designers should follow the manufacturer datasheet when selecting external resistance, capacitance, grounding, and digital-interface arrangements. The serial interface supports SPI-compatible and SSI-compatible communication, allowing the device to be connected to microcontrollers, serial peripherals, and embedded control systems. Typical applications include portable medical instruments, industrial pressure and temperature monitoring, low-power environmental sensors, battery-powered data loggers, and precision process-control nodes. Differential inputs are especially useful when the measured signal is small relative to environmental noise. System partitioning should preserve the converter's differential-input architecture rather than converting the signal into a single-ended path unnecessarily. PCB design should keep analog input traces short, place filtering components close to the converter, and maintain a quiet return path for the analog and digital grounds. The manufacturer datasheet should be used to assign every pin and to select bypass capacitors because the supplied technical summary does not reproduce the complete electrical-characteristics table or pin-description table. This page organizes the device's core function, verified operating characteristics, package details, applications, and design considerations into an engineering-focused reference. It also distinguishes true same-footprint alternatives from family members offered in different packages, helping designers avoid replacements that require PCB changes.

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ADS1286PAG4 - 12-bit 20kHz Micro Power SAR ADC | Texas Instruments
ADS1286PAG4

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.

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