ADS131M08QPBSRQ1 - 24-Bit 32-kSPS 8-Ch ADC | Texas Instruments
料号： ADS131M08QPBSRQ1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ADS131M08QPBSRQ1 概述
A delta-sigma ADC is a type of analog-to-digital converter that oversamples the input signal and applies noise shaping to achieve very high resolution, typically 16 to 24 bits, making it the dominant architecture for precision measurement in the data-converter hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. Simultaneous sampling means all eight channels are digitized at the same instant, which is essential when measuring phase relationships, such as voltage and current waveforms in power metrology.
Key features include 8 simultaneously sampling differential inputs, 24-bit resolution at up to 32 kSPS per channel, AEC-Q100 qualification for automotive applications, and Functional Safety-Capable status with documentation available to support functional-safety system design. Low power consumption of 6.0 mW at 3 V keeps self-heating and channel-to-channel crosstalk effects minimal in compact layouts.
According to the TI product page, the ADC inputs can be directly interfaced to shunt resistors for bidirectional battery-current measurements and to resistor-divider networks for high-voltage sensing, which is why the ADS131M08-Q1 family is targeted at automotive battery management systems (BMS). The industrial-grade ADS131M08 shares the same core for energy metering, power metrology, and circuit-breaker applications.
The device communicates over an SPI-compatible serial interface with daisy-chain support, allowing multiple ADCs to share one microcontroller SPI port, a common requirement in BMS slave boards.
When designing with the ADS131M08QPBSRQ1, plan the OSR and clocking scheme first, since output data rate and effective resolution trade off directly; also provide a low-noise analog supply and clean reference path to realize the full 24-bit dynamic range.
This page synthesizes distributor pricing and availability, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.
直接替换替代料： ADS131M08QPBSRQ1 ——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： ADS131M08QPBSRQ1 （相同外形与封装尺寸） ——差异在于 Number of Channels, Package, Interface, Sampling Rate, Application Focus.
快速对比工具——选择替代料号进行并排对比：
ADS131M08IPBS
✅ 直接替换✓ 有现货
$3.85 / 个
查看数据手册 →ADS131M08IPBSR
✅ 直接替换✓ 有现货
$6.6 / 个
查看数据手册 →ADS131M06QPBSRQ1
✅ 直接替换📋 参考替代料（不在目录中）
ADS131M06IPBS
✅ 直接替换📋 参考替代料（不在目录中）
ADS131M04QPBSRQ1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADS131B04QPBSRQ1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADS131M08QPBSRQ1 最大额定值与电气特性
| 分辨率 | 24 bit |
| Number of Channels | 8 (simultaneous sampling, differential) |
| 采样率 | 32 kSPS |
| ADC Architecture | Delta-Sigma |
| Input Type | Differential |
| 接口 | SPI (serial, daisy-chain capable) |
| Power Consumption | 6.0 mW at 3 V |
| 工作温度范围 | -40C to +125C (AEC-Q100 temperature grade 1) |
| Qualification | AEC-Q100 qualified (automotive) |
| Functional Safety | Functional Safety-Capable (documentation available) |
| 封装 | 32-TQFP (5x5 mm), PBS suffix |
| 安装类型 | Surface Mount |
| Application Focus | Automotive BMS, energy metering, power metrology |
ADS131M08QPBSRQ1 32-tqfp (5x5 mm), pbs suffix 引脚配置指南
ADS131M08QPBSRQ1（32-tqfp (5x5 mm), pbs suffix 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： ADS131M08QPBSRQ1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADS131M08QPBSRQ1 适用于 6 应用s: Automotive Battery Management Systems (BMS), Energy Metering and Power Metrology, Circuit Breakers and Protection Relays, Shunt-Based Current Measurement Modules, High-Voltage Sensing via Resistor Dividers, Multi-Channel Industrial Data Acquisition.
Automotive Battery Management Systems (BMS)
The ADS131M08QPBSRQ1 was purpose-built for automotive BMS per the TI product page. Its eight simultaneous-sampling 24-bit channels let one device digitize multiple cell voltages plus a shunt-based pack-current measurement at the same instant, which is critical for accurate state-of-charge and state-of-health calculations where phase alignment matters. The differential inputs connect directly to shunt resistors for bidirectional current sensing and to resistor-divider networks for high-voltage monitoring, eliminating extra signal-conditioning stages. AEC-Q100 grade 1 operation (-40C to +125C) and Functional Safety-Capable documentation support ASIL-oriented system designs in EV battery packs.
推荐
Energy Metering and Power Metrology
The industrial ADS131M08 family is explicitly positioned by TI for energy metering and power metrology, and the Q1 variant serves the same function in automotive and grid-edge hardware. Simultaneous sampling of voltage and current channels enables accurate real power, reactive power, and RMS calculations across a wide dynamic range; the 24-bit resolution supports high-accuracy class metering without additional gain stages. Direct interfacing to resistor dividers and shunts simplifies the analog front end. The 32-kSPS output rate is ample for 50/60 Hz waveform capture with significant oversampling margin for harmonic analysis in circuit-breaker and submetering products.
推荐
Circuit Breakers and Protection Relays
TI lists circuit-breaker applications as a target for the ADS131M08 platform. Protection devices require simultaneous capture of multiple phase currents and voltages so that trip decisions can be based on accurately time-aligned waveforms; the eight simultaneous 24-bit channels of this ADC provide exactly that alignment with high overload headroom via external dividers. The wide dynamic range lets one device cover both precision load monitoring and fault-transient capture at 32 kSPS. Low 6.0 mW consumption at 3 V suits always-on auxiliary-power-limited protection electronics, and the SPI daisy-chain mode supports multi-breaker architectures sharing a single controller.
推荐
Shunt-Based Current Measurement Modules
The ADS131M08-Q1 datasheet states the ADC inputs can be directly interfaced to shunt resistors for bidirectional battery-current measurements. With 24-bit resolution and simultaneous sampling, a low-value shunt can be read directly without a dedicated programmable-gain front end for moderate current ranges, while an INA223-class amplifier can extend the range for high-current automotive loads. The differential inputs reject common-mode noise in the noisy electromagnetic environment near contactors and inverters. Functional Safety-Capable documentation further supports current-monitoring functions used in ASIL-rated torque-limiting and overcurrent-protection paths.
推荐
High-Voltage Sensing via Resistor Dividers
Per the TI product page, the ADC inputs interface directly to resistor-divider networks for high-voltage measurements such as DC-link and isolation-monitoring voltages in EV systems. The 24-bit delta-sigma core provides enough resolution to read a divided-down 800 V bus with fine granularity for leakage and isolation-resistance estimation. Simultaneous sampling with the current channels allows synchronized power calculations. Designers should size divider impedance against the ADC input characteristics and sample time specified in the datasheet to balance accuracy, drift, and settling, and use the low-power operating point to minimize divider self-heating effects.
推荐
Multi-Channel Industrial Data Acquisition
Beyond metering, the eight-channel simultaneous-sampling 24-bit architecture fits general precision DAQ front ends: vibration, strain-gauge bridge, and multi-sensor test stands all benefit from channel-to-channel phase alignment and 32-kSPS bandwidth. The SPI daisy-chain interface lets multiple ADS131M08 devices share one controller SPI port, scaling to 16, 24, or more synchronized channels without extra glue logic. Industrial designs can use the pin-identical ADS131M08IPBS to cut cost, keeping the QPBSRQ1 for any channel feeding automotive or safety-rated subsystems. The 6.0 mW operating point also suits battery-powered portable analyzers.
推荐
推荐产品汇总
工程参考数据： ADS131M08QPBSRQ1 ——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 | ADS131M08IPBS | ADS131M08IPBSR | ADS131M06QPBSRQ1 | ADS131M04QPBSRQ1 |
|---|---|---|---|---|---|
| Package | 32-TQFP (5x5 mm), PBS | 32-TQFP (5x5 mm) - same footprint | 32-TQFP (5x5 mm) - same footprint | 32-TQFP (5x5 mm) - same footprint | 32-TQFP (5x5 mm) - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Sample Rate | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS |
| Channels | 8 simultaneous differential | 8 simultaneous differential | 8 simultaneous differential | 6 simultaneous differential | 4 simultaneous differential |
| Qualification | AEC-Q100 grade 1 (automotive) | Industrial (not AEC-Q100) | Industrial (not AEC-Q100) | AEC-Q100 grade 1 (automotive) | AEC-Q100 grade 1 (automotive) |
关键差异点
- Automotive AEC-Q100 grade 1 qualification with Functional Safety-Capable documentation （对比 ADS131M08IPBS)
- Eight simultaneous sampling channels in one package （对比 ADS131M06QPBSRQ1)
- Low 6.0 mW power at 3 V （对比 ADS131M04QPBSRQ1)
设计说明
Because all eight channels sample simultaneously, channel-to-channel matching depends heavily on symmetric layout: route the differential input pairs of each channel with matched lengths and keep them away from the SPI clock lines. Place anti-aliasing RC filters (typical first-order differential RC per datasheet typical-application circuits) directly at each AINx pin. Ground returns for each shunt/divider should be Kelvin-connected to the ADC ground reference to preserve the 24-bit resolution the converter is capable of delivering.
The 32-TQFP (5x5 mm) package has a 0.8 mm lead pitch; design the land pattern per the TI datasheet mechanical section and keep the analog supply and reference decoupling capacitors within a few millimeters of the corresponding pins. Separate the analog ground region under the ADC from the digital SPI routing area, joining at a single point near the supply. For automotive boards, provide series termination on SPI clock lines to control ringing in the noisy in-vehicle environment.
Estimated: at 6.0 mW dissipation (3 V supply, per verified data), junction rise is negligible (on the order of 1-2 C for typical theta_JA of a 32-TQFP), so no heatsinking is required; thermal design effort should instead focus on the shunt resistor and divider networks in the measurement path. Apply clean, low-noise analog AVDD and a stable reference; power-supply noise directly limits achievable effective resolution, so consider an LC filter or LDO feeding the ADC supply rail in BMS environments with switching regulators.
Do not confuse ordering codes: only the QPBSRQ1 (ADS131M08-Q1 family) carries AEC-Q100 grade 1 and Functional Safety-Capable documentation; the IPBS industrial part is electrically similar but is not automotive qualified. Also verify channel count before BOM substitution - ADS131M06/M04 variants share the package but provide fewer channels, which will silently drop measurement points. When using daisy-chain SPI mode, confirm frame-sync timing against the datasheet serial timing table with the full chain length.
合规信息
AEC-Q100 qualified for automotive applications, temperature grade 1: -40C to +125C (TA), per TI datasheet summary. Functional Safety-Capable with documentation available. RoHS/REACH/lead-free status not stated in verified data - confirm on TI product page quality section.
