ADS131M08IPBSR - 24-Bit 8-Ch 32kSPS Delta-Sigma ADC | TI
MPN： ADS131M08IPBSR ✓ 啟用中ADS131M08IPBSR 概覽
A simultaneous-sampling delta-sigma ADC is a precision data-converter architecture in which every channel is digitized at the same instant by its own ΔΣ modulator, eliminating the skew and phase error inherent to multiplexed ADCs. Within the signal-chain hierarchy (sensor front end -> precision ADC -> digital controller), simultaneous sampling is essential for power metrology, where voltage and current channels must be phase-aligned to compute real power, power factor, and harmonic content accurately.
Key features include full 24-bit resolution, per-channel oversampling with programmable data rates up to 32 kSPS, wide dynamic range, and low power operation. TI designed the family with energy-measurement-specific features such as a dedicated CRC on the serial interface for communication integrity, direct interfacing to resistor-divider networks and current transformers or Rogowski-coil front ends, and synchronized clocking across multiple devices for polyphase metering.
Architecturally, each of the eight channels integrates its own ΔΣ modulator and digital decimation filter, allowing all eight inputs to be sampled at exactly the same moment. This removes interchannel phase mismatch, a critical requirement for three-phase energy metering where per-phase voltage-current pairing must remain phase-accurate across the entire measurement bandwidth.
Typical applications include single- and polyphase electricity meters, power-quality analyzers, circuit breakers and protective relays, solar string inverters, and precision power metrology in industrial instrumentation. The wide dynamic range supports shunt- and CT-based current sensing without front-end gain stages.
When designing with the ADS131M08IPBSR, provide a clean analog supply, synchronize the SPI host clocking to the ADC frame timing, and account for anti-alias filtering ahead of the modulator inputs at the selected OSR and data rate.
This page synthesizes distributor pricing, drop-in alternatives within the ADS131M family, application guidance, and design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 ADS131M08IPBSR — 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： ADS131M08IPBSR （相同外形與佔位） — 差異在於 Interface, Package, Number of Channels, Sampling Rate, Architecture.
ADS131M08QPBSRQ1
✅ 直接替換聯絡詢價
查看資料表 →ADS131M06IPBSR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADS131M04IPBSR
✅ 直接替換📋 參考替代品（不在目錄中）
ADS131M08IPBSR 最大額定值與電氣特性
| 解析度 | 24 bit |
| Number of Channels | 8 |
| 取樣率 | 32 kSPS |
| Architecture | Delta-Sigma (ΔΣ), simultaneous sampling |
| 介面 | SPI (serial) |
| 封裝 | 32-TQFP (PBS), 5x5 mm |
| 工作溫度範圍 | -40C to +125C |
| 安裝類型 | Surface Mount |
| MSL 等級 | 2 (260C, 1 year) |
| RoHS 狀態 | Compliant |
| Packaging | Tape & Reel (R suffix) |
| 類別 | Analog to Digital Converters - ADC |
| REACH Status | unknown |
ADS131M08IPBSR 32-tqfp (pbs), 5x5 mm 腳位配置指南
ADS131M08IPBSR（32-tqfp (pbs), 5x5 mm 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： ADS131M08IPBSR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADS131M08IPBSR 適用於 6 應用s: Polyphase Energy Metering, Circuit Breakers and Protective Relays, Solar String Inverters and PV Monitoring, Power Quality Analyzers, Motor Drive and Servo Current Sensing, Battery Management and EV Charging Stations.
Polyphase Energy Metering
The ADS131M08IPBSR was purpose-built by TI for energy metering, and its eight simultaneous 24-bit channels map directly onto a three-phase meter: three voltage channels via resistor dividers, three current channels via CTs or shunts, plus neutral current and an auxiliary input. Because all eight channels are digitized by independent ΔΣ modulators at the same instant, interchannel phase error is eliminated - essential for accurate real and reactive power computation across 50/60 Hz fundamentals and their harmonics. The 32-kSPS maximum data rate provides ample oversampling margin, and the CRC-protected SPI link safeguards revenue-grade data integrity in the final meter product.
推薦
Circuit Breakers and Protective Relays
In circuit-breaker and protective-relay electronics, current and voltage channels must be sampled simultaneously so that protection algorithms (overcurrent, differential, power-direction detection) can act on phase-accurate data. The ADS131M08IPBSR provides eight simultaneous 24-bit channels at up to 32 kSPS, giving relay firmware high-resolution waveforms with no channel-to-channel skew. Its wide dynamic range accommodates both the small quiescent-signal regime and the large fault transients typical of breaker sensing, and the CRC on the serial interface adds a communication integrity check consistent with protection-equipment reliability expectations. The -40C to +125C operating range supports harsh substation and panel environments.
推薦
Solar String Inverters and PV Monitoring
Grid-tied solar inverters require phase-aligned sampling of PV-side and grid-side voltages and currents to implement MPPT, anti-islanding, and grid power-quality compliance. The ADS131M08IPBSR's eight simultaneous channels capture DC input, AC output voltage, and output current waveforms without multiplexer skew, while 24-bit resolution resolves the small ripple components used for MPPT decisions. The direct resistor-divider interface for voltage channels and CT/Rogowski support for current channels reduces front-end complexity and cost. The TI reference-design ecosystem also documents pairing this ADC with C2000 MCUs for precise bidirectional power-stage control in inverter topologies.
推薦
Power Quality Analyzers
Power-quality analyzers measure harmonics, flicker, sags, and swells, which demands simultaneous, high-resolution capture of all phases. The ADS131M08IPBSR samples eight channels at the same instant with 24-bit resolution and up to 32-kSPS output rate, providing the bandwidth to characterize harmonics well beyond the 40th order of a 50/60 Hz fundamental while maintaining channel phase alignment for direction and power-factor calculations. Its programmable oversampling lets the analyzer trade bandwidth against noise floor per IEC-style measurement profiles, and the energy-metering-specific feature set (CRC-checked SPI, direct divider interfacing) simplifies the signal chain in portable and panel-mounted PQ instruments.
推薦
Motor Drive and Servo Current Sensing
Precision motor-control systems benefit from simultaneously sampled phase currents, because torque calculations and field-oriented control assume instantaneous phase alignment. A TI reference design demonstrates exactly this topology: a C2000 MCU controlling a bidirectional interleaved buck power stage with the ADS131M08 providing precision current and voltage feedback. In a three-phase servo drive, three of the eight channels capture motor phase currents via shunts while others monitor DC bus voltage and temperature-derived signals, all sampled with zero skew. The 24-bit resolution enables low-shunt-value sensing with minimal power loss, improving drive efficiency without sacrificing control-loop accuracy.
推薦
Battery Management and EV Charging Stations
DC fast-charging stations and battery-test systems need accurate, phase-consistent measurement of voltage and current to compute delivered energy within billing-grade accuracy. The ADS131M08IPBSR digitizes up to eight sense points simultaneously at 24-bit resolution, letting one device cover multiple charging ports or a battery pack's current shunt, bus voltage, and auxiliary channels without multiplexing artifacts. Its -40C to +125C temperature range suits outdoor EVSE enclosures, and the CRC-protected SPI interface maintains data integrity across the isolation barrier when combined with a digital isolator. For automotive-qualified deployments, the pin-compatible ADS131M08QPBSRQ1 variant applies directly.
推薦
推薦產品摘要
工程參考資料，適用於 ADS131M08IPBSR — 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 | ADS131M08QPBSRQ1 | ADS131M06IPBSR | ADS131M04IPBSR | AD7768-4 |
|---|---|---|---|---|---|
| Package | 32-TQFP (PBS), 5x5 mm | 32-TQFP (PBS), 5x5 mm - same | 32-TQFP (PBS), 5x5 mm - same | 32-TQFP (PBS), 5x5 mm - same | Different package/pinout - not drop-in |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Channels | 8 simultaneous | 8 simultaneous | 6 simultaneous | 4 simultaneous | 4 simultaneous |
| Max Sample Rate | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS | 256 kSPS |
| Interface | SPI with CRC | SPI with CRC | SPI with CRC | SPI with CRC | SPI |
主要差異化特點
- Eight simultaneous channels in one package (對比ADS131M04IPBSR)
- Energy-metering-specific feature set (對比AD7768-4)
- Metrology bandwidth efficiency (對比AD7768-4)
設計說明
Provide clean, well-decoupled analog and digital supplies and a low-jitter master clock - delta-sigma noise performance depends directly on clock quality and supply ripple. Place 100 nF ceramic decoupling capacitors at each supply pin as close to the device as possible, with bulk capacitance nearby. Separate the analog ground region under the TQFP from the SPI digital return path, joining them at a single point to keep digital switching currents out of the analog front end.
Front-end conditioning determines achievable accuracy: use precision resistor dividers for voltage channels sized for power dissipation and ratio drift, and burden or sense networks matched per channel for CT inputs. Because channels sample simultaneously, mismatch between channel front ends shows up directly as gain/phase error in power calculations - use 0.1% or better resistors for metrology-grade accuracy. Anti-alias filtering ahead of the modulator inputs should be selected for the chosen oversampling ratio and data rate.
Frame timing on the SPI interface is fixed by the ADC: the host must read conversion data within the defined frame window or data is lost - do not assume arbitrary SPI transaction timing. When synchronizing multiple ADS131M08 devices for polyphase systems, route SYNC and clock lines with matched lengths. For handling, note MSL 2 rating (260C, 1 year floor-life) - reflow-baked or sealed storage is required if floor life is exceeded.
合規資訊
RoHS compliant per distributor compliance data (PartGenie: RoHS Compliant, MSL Level 2-260C-1 YEAR). Not AEC-Q100 qualified - use ADS131M08QPBSRQ1 for automotive. REACH and conflict-minerals status not stated in provided data.
