ADS131M08IRSNR - 24-Bit 32kSPS 8-Ch Delta-Sigma ADC | TI
부품 번호: ADS131M08IRSNR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $6.67 | $6.67 |
| 10 | $6 | $60.00 |
| 100 | $5.34 | $534.00 |
| 500 | $4.81 | $2,405.00 |
| 1,000 | $4.33 | $4,330.00 |
ADS131M08IRSNR 개요
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 the device family a key element of the broader signal chain hierarchy: delta-sigma ADC -> data converter -> mixed-signal IC -> semiconductor. Because the channels are sampled simultaneously, phase relationships between all inputs are preserved - critical for multi-phase power measurement.
Key features include 24-bit resolution across all eight simultaneous channels, a programmable output data rate up to 32 kSPS, energy-measurement-specific features such as a built-in phase calibration and a wide dynamic range optimized for current transformers, shunts, and Rogowski coils. The inputs can interface directly to resistor-divider networks or power-line monitoring circuitry, and the device communicates over a SPI-compatible serial interface.
Architecturally, each channel uses its own delta-sigma modulator with a shared digital filter stage, guaranteeing inherent simultaneous sampling without channel-to-channel skew. TI specifically designed the ADS131M08 for energy metering, power metrology, and circuit breaker applications, where wide dynamic range and channel-to-phase accuracy translate directly into metering class compliance.
Typical applications include polyphase smart energy meters, solar string inverters and power quality analyzers, plus power metrology in motor control and circuit breaker protection where multiple voltage and current channels must be digitized with zero sample skew.
A key design consideration is that the ADC inputs can be driven directly from resistor dividers, but anti-aliasing filter design and reference stability directly determine achievable ENOB - verify the manufacturer datasheet guidance before finalizing the analog front end.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
드롭인 대체품: ADS131M08IRSNR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ADS131M08IRSNR (동일 폼 팩터 및 풋프린트) — 차이점: Interface, Number of Channels, Package, Power Consumption, Sampling Rate.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ADS131M06IRSNT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ADS131M04IRSNT
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
ADS131M02IRSNT
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
ADS131M08QPBSRQ1
✅ 드롭인✓ 재고 있음
가격 문의
데이터시트 보기 →ADS131M08IRSNR 최대 정격 & 전기적 특성
| 분해능 | 24 bit |
| Number of Channels | 8 (simultaneous sampling) |
| Converter Type | Delta-Sigma (ΔΣ) |
| 샘플링 속도 | up to 32 kSPS per channel |
| Number of Inputs | 8 |
| 인터페이스 | SPI (serial) |
| 패키지 | 32-QFN (4x4 mm) |
| 실장 유형 | Surface Mount |
| 동작 온도 | -40C to +125C (I grade) |
| Typical Applications | Energy metering, power metrology, circuit breakers |
| Input Interfacing | Direct resistor-divider or transformer interface |
| Dynamic Range | Wide dynamic range (energy-measurement optimized) |
| Power Consumption | Low power (per datasheet) |
| RoHS 상태 | Compliant (standard TI offering) |
ADS131M08IRSNR 32-qfn (4x4 mm) 핀 구성 가이드
ADS131M08IRSNR(32-qfn (4x4 mm) 패키지)의 핀 구성입니다. 이 아날로그 부품에는 입력, 출력, 전원 공급 핀이 있습니다. 오프셋 널, 보상, 인에이블 핀 구성은 제조사 데이터시트를 참조하십시오. 신호 컨디셔닝 및 증폭기 회로에 이상적입니다.
다음에 대한 상세 핀아웃 데이터 없음: ADS131M08IRSNR.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
ADS131M08IRSNR 적합 용도: 6 애플리케이션s: Polyphase Smart Energy Meters, Solar String Inverters, Circuit Breakers and Protection Relays, Power Quality Analyzers, Motor Control and Drive Metrology, Bidirectional DC-DC Converter Control.
Polyphase Smart Energy Meters
The ADS131M08's eight simultaneously-sampling 24-bit channels are purpose-built for polyphase metering: three phase voltages, three phase currents, neutral current, and one spare channel all digitize with zero inter-channel skew, which is mandatory for accurate active/reactive power calculation across phases. The wide dynamic range supports direct connection to resistor-divider voltage sensing and CT or shunt current sensing without external gain stages. Its energy-measurement-specific features, such as phase calibration, help designers meet metering accuracy class requirements, while the low-power operation suits communication-enabled smart meter endpoints.
추천
Solar String Inverters
In grid-tied solar string inverters, the ADS131M08 digitizes DC string voltages/currents plus AC grid side voltage and current channels simultaneously, enabling accurate power, energy, and power-factor computation for grid compliance and MPPT control. The 32-kSPS per-channel rate provides ample bandwidth for 50/60 Hz metrology with margin for harmonics analysis, and the 24-bit resolution resolves low-current night-time consumption for anti-islanding and standby-power monitoring. Simultaneous sampling preserves phase alignment between grid voltage and inverter output current - critical for accurate feed-in billing and reactive power control.
추천
Circuit Breakers and Protection Relays
The ADS131M08 fits circuit breaker and protection applications because it continuously samples multiple current channels with wide dynamic range, capturing both normal load currents and short-circuit fault transients without range switching. The simultaneous sampling of all eight channels means phase comparison and residual (sum-of-currents) earth-fault detection remain phase-accurate. Its energy-measurement heritage provides precise RMS computation from the digitized streams, letting protection algorithms trip on accurate thresholds, while SPI CRC error checking ensures data integrity in the electrically noisy switchgear environment.
추천
Power Quality Analyzers
Power quality analyzers must measure voltage sags, swells, harmonics, and unbalance across all three phases at once. The ADS131M08's eight simultaneous 24-bit channels capture all phase voltages and currents coherently, and its 32-kSPS maximum data rate resolves harmonic content well beyond the 50th harmonic order per IEC-type measurement practice. The wide dynamic range accommodates both high load currents and small leakage/standby currents in a single range, and per-channel delta-sigma modulators eliminate multiplexer settling artifacts that plague scanned-input ADCs in power quality instruments.
추천
Motor Control and Drive Metrology
In motor drives, the ADS131M08 provides simultaneous digitization of three phase currents plus DC bus voltage and current, giving the control loop phase-accurate feedback for field-oriented control and precise power metering of the drive. The 32-kSPS rate comfortably exceeds typical PWM control-loop update rates, and the delta-sigma architecture provides inherent anti-aliasing that suppresses switching-frequency noise from the inverter stage. Its low latency filter modes support fast overcurrent detection, while the 24-bit resolution enables high-accuracy torque ripple and efficiency analysis in lab and production test systems.
추천
Bidirectional DC-DC Converter Control
TI's reference design for precisely controlling the current and voltage of a bidirectional interleaved buck-converter power stage pairs a C2000 MCU with the ADS131M08 precision ADC. The ADC's simultaneous multi-channel sampling captures inductor currents and bus voltages without skew, enabling accurate current sharing between interleaved phases and fast transient response in battery charge/discharge and energy-storage converters. The 24-bit resolution supports coulomb-counting-level current accuracy, while the SPI interface with CRC gives the digital controller clean, trustworthy feedback data in high dV/dt power conversion environments.
추천
추천 제품 요약
엔지니어링 참조 데이터: ADS131M08IRSNR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ADS131M06IRSNT | ADS131M04IRSNT | ADS131M02IRSNT | ADS131M08QPBSRQ1 |
|---|---|---|---|---|---|
| Package | QFN-32 (4x4 mm) | QFN-32 (4x4 mm) - same | QFN-32 (4x4 mm) - same | QFN-32 (4x4 mm) - same | VQFN-64 - different footprint (Q1 variant) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Channel Count | 8 (simultaneous) | 6 | 4 | 2 | 8 |
| Max Sampling Rate | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS |
| Sampling Architecture | Simultaneous sampling | Simultaneous sampling | Simultaneous sampling | Simultaneous sampling | Simultaneous sampling |
| Interface | SPI (serial) | SPI (serial) | SPI (serial) | SPI (serial) | SPI (serial) |
주요 차별점
- Full 8-channel simultaneous sampling in a compact 4x4 mm footprint (vs ADS131M06IRSNT)
- Energy-measurement-specific feature set (vs AD7768)
- Cost optimization path within the same footprint (vs ADS131M04IRSNT)
설계 노트
Keep the analog front-end routing for the eight input channels symmetric and away from the SPI clock lines to prevent digital coupling into the delta-sigma inputs. Place a solid ground plane under the QFN-32 (4x4 mm) and use a low-ESR 100 nF decoupling capacitor at each supply pin plus bulk capacitance near the device. Route voltage-channel resistor dividers with short, matched traces so per-channel parasitics remain consistent across phases - mismatch here directly appears as phase error in metering calculations.
Because each of the eight channels has its own modulator, simultaneous sampling is inherent - but the accuracy of phase relationships depends on a clean master clock. Use a crystal or low-jitter oscillator for the ADC clock rather than an MCU-generated GPIO clock, and follow the TI datasheet SPI timing requirements (setup/hold) to avoid read errors at high SCLK rates. Enable the optional CRC data-word check when operating in electrically noisy switchgear or inverter environments.
Do not assume the ADS131M08QPBSRQ1 automotive variant is pin-compatible on your board - it comes in a larger VQFN-64 package, so switching grades mid-design requires PCB rework. Also, performance metrics such as SNR and ENOB are characterized differently between vendors; per the TI E2E forum discussion on ADS131M08 vs Microchip MCP3914A1, a direct datasheet-to-datasheet comparison of SINAD/SFDR between manufacturers is not valid. Always compare against TI's own characterization conditions stated in the ADS131M08 datasheet.
규정 준수 정보
RoHS status per standard TI offering (IRSNR suffix, Tape & Reel). Not AEC-Q100 qualified - use ADS131M08QPBSRQ1 for automotive. Detailed REACH/halogen status: verify on TI.com product page.
