ADS1256IDBR - 24-Bit 30kSPS Delta-Sigma ADC | Texas Instruments
MPN： ADS1256IDBR ✓ 啟用中ADS1256IDBR 概覽
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.
直接替換替代品，適用於 ADS1256IDBR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADS1256IDBR （相同外形與佔位） — 差異在於 Package, RoHS Status.
ADS1256IDBT
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1255IDBR
✅ 直接替換聯絡詢價
查看資料表 →ADS1256IDBR 最大額定值與電氣特性
| 解析度 | 24 bit |
| Maximum Data Output Rate | 30 kSPS |
| Input Configuration | 4 differential or 8 single-ended inputs |
| Converter Architecture | Fourth-order delta-sigma modulator with programmable digital filter |
| Programmable Gain Amplifier | Integrated |
| 封裝 | 28-pin SSOP |
| 工作溫度 | -40 °C to +85 °C |
| Application Category | Factory automation and process control |
| 介面類型 | Serial digital interface |
| Digital Filter | Programmable |
| 安裝類型 | Surface mount |
| MSL 等級 | 2 (260 °C, 1 year) |
| RoHS 狀態 | ROHS3 compliant |
| REACH Status | unknown |
| AEC-Q100 Status | unknown |
| Lead-Free Status | unknown |
| Halogen-Free Status | unknown |
ADS1256IDBR 28-pin ssop 腳位配置指南
ADS1256IDBR（28-pin ssop 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： ADS1256IDBR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADS1256IDBR 適用於 6 應用s: Factory Pressure Measurement, Industrial Temperature Sensing, Load-Cell Signal Acquisition, Precision Current Monitoring, Laboratory Instrumentation, Process-Level Measurement.
Factory Pressure Measurement
ADS1256IDBR fits slow, high-resolution factory pressure monitoring because it combines 24-bit conversion resolution with four differential inputs and an integrated programmable gain amplifier. The PGA can help bring a low-level bridge or transmitter signal into the converter’s usable measurement range, while the programmable digital filter helps reject noise outside the selected measurement bandwidth. The 30kSPS maximum output rate provides margin for digital filtering and control-loop calculations, although the converter is not intended for high-frequency pressure transients. Texas Instruments identifies factory automation and process control as a primary application. The designer should verify input range, reference voltage, sensor excitation, filter settling, and calibration behavior against the ADS1256 datasheet before finalizing analog scaling.
推薦
Industrial Temperature Sensing
ADS1256IDBR is well matched to precision temperature-sensor acquisition when the measurement bandwidth is moderate and high resolution is valuable. Four differential inputs support isolated pairs of sensing channels, and eight single-ended inputs can serve simpler unipolar sensor arrangements. The integrated programmable gain amplifier allows the front end to accommodate small sensor signals without relying on a separate gain stage, while the fourth-order delta-sigma modulator and programmable digital filter support low-noise acquisition. The design must still account for thermocouple cold-junction compensation, RTD excitation, sensor-specific lead resistance, and the required settling time. ADS1256IDBR is therefore best for precision process monitoring rather than ultrafast thermal waveform capture.
推薦
Load-Cell Signal Acquisition
The ADS1256IDBR can serve as the core ADC for a load-cell front end because its four differential inputs are suited to bridge-derived differential signals and its integrated PGA is designed for precision analog measurement. A bridge excitation, input protection network, reference, and output filtering must be designed around the converter’s electrical limits. The 24-bit resolution helps preserve small full-scale readings, while the programmable digital filter can suppress noise when the load changes more slowly than the selected output rate. For dynamic force measurement, verify settling time and bandwidth; for weighing and force-gauge applications, calibration drift, reference stability, and channel switching are likely more important than maximum sampling rate.
推薦
Precision Current Monitoring
ADS1256IDBR can measure low-level current signals in industrial power and process-control equipment when the current sensor produces a differential voltage within the ADC’s supported input range. Differential input support reduces sensitivity to common-mode voltage, while the integrated PGA improves use of the converter’s measurement span for small shunt or current-transformer outputs. The programmable digital filter helps reject ripple and out-of-band noise, but the filter and data-rate settings determine settling behavior. Designers should verify the actual common-mode range, input impedance, shunt or transformer bandwidth, reference accuracy, and electrical limits in the manufacturer datasheet. The 30kSPS ceiling is useful for many monitoring loops but does not make this converter suitable for high-bandwidth current waveform analysis.
推薦
Laboratory Instrumentation
ADS1256IDBR is suitable for laboratory and test equipment that measures slow, precision sensor outputs and requires multiple analog channels. Four differential inputs can support balanced sensor bridges, current loops, or paired measurements, while eight single-ended inputs provide flexibility for multiplexed channels. The programmable digital filter allows the instrument designer to optimize noise rejection for a particular measurement bandwidth, and the 24-bit resolution supports high-resolution displayed values. However, the converter must be paired with a suitable excitation source, reference, protection network, and calibration strategy. For a laboratory product, verify settling after channel selection, digital-interface timing, and the required measurement accuracy before choosing filter and data-rate settings.
推薦
Process-Level Measurement
ADS1256IDBR is a practical fit for tank-level, valve-position, and other process-control measurements where the analog signal changes slowly and accurate repeatable readings matter. The differential input structure can help reject common-mode noise in industrial wiring, and the integrated PGA simplifies conditioning of low-level sensor outputs. The programmable digital filter provides a way to reject process noise, but excessive filtering may slow the control response. Designers should choose the data rate and filter based on the process time constant, then include calibration for sensor offset, gain, and reference drift. The manufacturer’s factory-automation and process-control positioning directly supports this use, while the electrical limits and pin-specific implementation must be confirmed in the TI ADS1256 datasheet.
推薦
推薦產品摘要
工程參考資料，適用於 ADS1256IDBR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADS1256IDBT | ADS1255IDBR |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-pin SSOP | 28-pin SSOP family option; verify ordering table | 28-pin SSOP family option; verify exact ordering table |
主要差異化特點
- High-resolution precision conversion (對比ADS1256IDBT)
- Integrated measurement conditioning (對比ADS1255IDBR)
- Process-control positioning (對比ADS1262IPWR)
設計說明
Place analog input and reference components close to their associated ADS1256 pins, and route sensitive analog traces away from serial interface lines. The supplied verified data identifies a 28-pin SSOP package but does not provide exact trace-length or component-placement requirements. Use the Texas Instruments ADS1256 datasheet and layout guidance for final capacitor placement, grounding, and signal-return design. Estimated design work should be reviewed against the complete electrical table rather than inferred from the package outline.
Choose the data rate and programmable digital-filter settings together. A more aggressive filter can improve rejection of process and sensor noise, but it may increase settling time after a channel change or step input. The verified product information confirms 30kSPS maximum output rate and programmable filtering, but it does not provide filter-response values or settling-time numbers. Record the selected configuration and validate latency in the final analog and firmware design.
Do not treat ADS1256IDBT, REF200AU, or ADS1262IPWR as an automatic drop-in replacement. The supplied cross-reference results identify these as related comparison leads, but they do not verify a complete pinout, supply, interface, channel-count, and electrical match for ADS1256IDBR. In particular, REF200AU is a reference-device lead rather than a direct ADC replacement. Validate the exact manufacturer package, pin assignment, and acquisition protocol before releasing a substitute into production.
The verified excerpts do not provide the ADC supply-voltage limits or power-consumption values, so a power budget cannot be calculated responsibly from the available data. Confirm analog and digital supply requirements, reference current, digital-interface current, and operating temperature against the Texas Instruments ADS1256 datasheet. Estimated dissipation values based on guessed voltages would not be reliable for this part and are intentionally not supplied.
合規資訊
The supplied PartGenie result identifies ADS1256IDBR as ROHS3 compliant and states MSL level 2-260C-1 YEAR. REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status are not verified in the supplied data.