ADS1262 - 32-Bit 38-kSPS Delta-Sigma ADC with PGA | TI
料号： ADS1262 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.5 | $9.50 |
| 10 | $8.6 | $86.00 |
| 100 | $7.7 | $770.00 |
| 500 | $7 | $3,500.00 |
| 1,000 | $6.4 | $6,400.00 |
ADS1262 概述
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.
直接替换替代料： ADS1262 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADS1262 （相同外形与封装尺寸） ——差异在于 Interface, Internal Reference.
快速对比工具——选择替代料号进行并排对比：
ADS1263IPW
✅ 直接替换📋 参考替代料（不在目录中）
ADS1262 最大额定值与电气特性
| 分辨率 | 32 bit |
| Maximum Sample Rate | 38.4 kSPS |
| Architecture | Delta-Sigma (ΔΣ) |
| Number of Inputs | 5 differential / 10 single-ended |
| Input Type | Differential / Single-Ended |
| Integrated PGA | Yes, gain 1 to 32 |
| Internal Reference | 2.5 V low-drift bandgap |
| 接口 | SPI |
| Fault Monitors | Internal (sensor open/short detection) |
| 工作温度 | -40C to +125C |
| 封装 | 28-TSSOP |
| 安装类型 | Surface Mount |
| 品牌 | Texas Instruments |
| Auxiliary ADC (ADS1263 only) | Not present (ADS1263 has 24-bit auxiliary ADC) |
| Pin Compatibility | Pin and functional compatible with ADS1263 |
ADS1262 引脚配置
| 引脚 1 | AVDD — Analog power supply |
| 引脚 2 | AVSS — Analog ground |
| 引脚 3 | AIN0 — Analog input 0 (positive differential) |
| 引脚 4 | AIN1 — Analog input 1 |
| 引脚 5 | AIN2 — Analog input 2 |
| 引脚 6 | AIN3 — Analog input 3 |
| 引脚 7 | AIN4 — Analog input 4 |
| 引脚 8 | AINCOM — Common analog input |
| 引脚 9 | REFP0 — Positive reference input |
| 引脚 10 | REFN0 — Negative reference input |
| 引脚 11 | SCLK — SPI serial clock input |
| 引脚 12 | DIN — SPI data input |
| 引脚 13 | DOUT/DRDY — SPI data output / data ready (multiplexed) |
| 引脚 14 | CS — SPI chip select |
| 引脚 15 | START — Conversion start control |
| 引脚 16 | RESET — Device reset |
典型应用
ADS1262 适用于 6 应用s: Weigh Scales and Load Cells, RTD Temperature Measurement, Thermocouple Acquisition, Industrial Process Control Front Ends, Precision Data Acquisition Systems, Battery-Powered and Portable Instrumentation.
Weigh Scales and Load Cells
The ADS1262 fits weigh scales because its 32-bit resolution and integrated PGA (gain up to 32) resolve microvolt-level load cell bridge outputs without a separate instrumentation amplifier. Ratiometric wiring between the bridge excitation and the 2.5-V reference cancels excitation drift, while internal fault monitors detect open or shorted load cell wiring continuously. Placed directly after the bridge with a simple RC anti-alias filter, it delivers laboratory-grade accuracy in a single 28-TSSOP chip.
推荐
RTD Temperature Measurement
For high-accuracy RTD measurement, the ADS1262's PGA gain of 32 amplifies the small 3-wire or 4-wire RTD voltage, and the 2.5-V low-drift reference enables ratiometric excitation that cancels reference drift from the error budget. The 32-bit noise floor resolves sub-0.01C changes, and internal fault monitors flag open RTD leads for system diagnostics in industrial installations. A single device replaces a discrete amplifier, reference, and ADC chain.
推荐
Thermocouple Acquisition
The ADS1262 measures thermocouples directly thanks to its low input noise at PGA gain 32, resolving microvolt-level Seebeck signals. An on-chip temperature sensor provides cold-junction compensation without an extra device, and the flexible digital filter allows slower, higher-resolution readings typical of thermal applications. Fault monitors detect open thermocouple wiring, a mandatory diagnostic in process control, while the SPI interface streams data to the host MCU.
推荐
Industrial Process Control Front Ends
In 4-20 mA and industrial transmitters, the ADS1262 provides a complete AFE: 10 single-ended or 5 differential inputs multiplex multiple sensors into one converter, and fault monitors support HART-era diagnostics for sensor wiring. The -40C to +125C rating suits outdoor and cabinet installations, and the chopper-stabilized delta-sigma architecture keeps offset drift negligible over temperature, maintaining calibration intervals in long-life field instruments.
推荐
Precision Data Acquisition Systems
For multichannel DAQ, the ADS1262 replaces a discrete amplifier-plus-ADC chain with one SPI-controlled chip. Programmable data rates up to 38.4 kSPS and selectable filter modes let designers trade speed against resolution per channel, while GPIOs control external multiplexers or relays. The buffered 2.5-V reference output can bias signal conditioning stages, and the 28-TSSOP package eases layout in dense acquisition cards.
推荐
Battery-Powered and Portable Instrumentation
Portable instruments benefit from the ADS1262's integration: one chip provides PGA, reference, temperature sensor, and GPIOs, reducing quiescent budget versus multi-chip chains. Power-down modes between conversions extend battery life in handheld meters and environmental loggers, and the delta-sigma converter's inherent linearity eliminates calibration firmware complexity. A clean low-current LDO supply preserves the noise floor in battery designs.
推荐
推荐产品汇总
工程参考数据： ADS1262 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADS1263IPW | ADS1261 | ADS1256 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Integrated PGA | Yes, gain 1-32 | Yes, gain 1-32 | Yes | Yes, gain 1-64 |
| Internal Reference | Yes, 2.5 V | Yes, 2.5 V | Yes | No - external required |
| Auxiliary ADC | No | Yes (24-bit) | No | No |
| Pin Compatibility | Compatible with ADS1263 | Pin-to-pin drop-in | Not pin-compatible | Not pin-compatible |
关键差异点
- Highest integration in TI precision ADC family （对比 ADS1256)
- 32-bit resolution vs lower-resolution alternatives （对比 ADS1261)
- Drop-in upgrade path with auxiliary ADC （对比 ADS1263IPW)
设计说明
Power the analog supply from a clean 5-V LDO; switching regulator ripple at the PGA input degrades the 32-bit noise floor. Bypass AVDD with 100-nF ceramics plus 10-uF bulk close to the pins, and bypass the 2.5-V internal reference output similarly - the reference bypass capacitor value affects reference-noise filtering and startup.
Keep the analog input routing short and symmetric for differential channels, and guard the reference inputs (REFP0/REFN0) from digital SPI traces. Use a solid analog ground under the ADS1262 and return SPI ground currents separately to avoid modulating the input multiplexer ground reference.
Use the DOUT/DRDY multiplexed line correctly: DRDY falling edges signal conversion readiness, and reading without waiting for DRDY yields stale or corrupted data. Ensure CS frames entire SPI commands, and observe the START pin state - conversions do not begin while START is low unless command-based sync is used.
Self-heating of the die shifts the internal reference and temperature sensor readings. Minimize PGA gain-related dissipation with low source impedance sensors, allow thermal settling after power-up, and avoid placing the ADC near power devices; at -40C to +125C ambient, budget self-heating in the accuracy error budget.
合规信息
Compliance status not stated in provided verified data; confirm on TI product page for ADS1262IPW.
