ADS1262 - 32-Bit 38-kSPS Delta-Sigma ADC with PGA | TI
부품 번호: ADS1262 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 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 개요
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.
드롭인 대체품: ADS1262 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ADS1262 (동일 폼 팩터 및 풋프린트) — 차이점: Interface, Internal Reference.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ADS1263IPW
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ADS1262 최대 정격 & 전기적 특성
| 분해능 | 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 |
| 인터페이스 | SPI |
| Fault Monitors | Internal (sensor open/short detection) |
| 동작 온도 | -40C to +125C |
| 패키지 | 28-TSSOP |
| 실장 유형 | Surface Mount |
| 브랜드 | Texas Instruments |
| Auxiliary ADC (ADS1263 only) | Not present (ADS1263 has 24-bit auxiliary ADC) |
| Pin Compatibility | Pin and functional compatible with ADS1263 |
ADS1262 핀 구성
| 핀 1 | AVDD — Analog power supply |
| 핀 2 | AVSS — Analog ground |
| 핀 3 | AIN0 — Analog input 0 (positive differential) |
| 핀 4 | AIN1 — Analog input 1 |
| 핀 5 | AIN2 — Analog input 2 |
| 핀 6 | AIN3 — Analog input 3 |
| 핀 7 | AIN4 — Analog input 4 |
| 핀 8 | AINCOM — Common analog input |
| 핀 9 | REFP0 — Positive reference input |
| 핀 10 | REFN0 — Negative reference input |
| 핀 11 | SCLK — SPI serial clock input |
| 핀 12 | DIN — SPI data input |
| 핀 13 | DOUT/DRDY — SPI data output / data ready (multiplexed) |
| 핀 14 | CS — SPI chip select |
| 핀 15 | START — Conversion start control |
| 핀 16 | RESET — Device reset |
일반적인 애플리케이션
ADS1262 적합 용도: 6 애플리케이션s: 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.
추천
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.
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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.
추천
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.
추천
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.
추천
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.
추천
추천 제품 요약
엔지니어링 참조 데이터: ADS1262 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | 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 |
주요 차별점
- Highest integration in TI precision ADC family (vs ADS1256)
- 32-bit resolution vs lower-resolution alternatives (vs ADS1261)
- Drop-in upgrade path with auxiliary ADC (vs ADS1263IPW)
설계 노트
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.
규정 준수 정보
Compliance status not stated in provided verified data; confirm on TI product page for ADS1262IPW.
