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Texas Instruments ADS131B23QPHPRQ1
- Part No.:
- ADS131B23QPHPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 48-PowerTQFP
- Datasheet:
-
ADS131B23QPHPRQ1.pdf
- Description:
- AUTOMOTIVE, 24-BIT, 64-KSPS, THR
- Quantity:
- Payment:
- Shipping:
Inventory:1,875
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Product details
Overview
ADS131B23QPHPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) automotive battery pack monitor IC with two simultaneous-sampling 24-bit current-measurement ADCs (ADC1A/ADC1B), one 16-bit multiplexed voltage/temperature ADC (ADC2A), SPI interface, and 9 GPIOs with PWM capability - designed for high-voltage EV BMS current-shunt, pack-voltage, and thermistor-based temperature sensing.
For engineers reviewing the ADS131B23QPHPRQ1 datasheet, ADS131B23QPHPRQ1 pinout, ADS131B23QPHPRQ1 application, or ADS131B23QPHPRQ1 equivalent, this page delivers verified functional safety features (ASIL D hardware/systematic capability), real-time overcurrent detection via dual digital comparators, precision reference outputs (1.25 V ±0.05%), and diagnostic coverage including clock, supply, and open-wire monitoring - all critical for ISO 26262-compliant BMS design.
Technical Context
The ADS131B23QPHPRQ1 integrates two independent, simultaneous-sampling 24-bit delta-sigma ADCs (ADC1A/ADC1B) with programmable gain (4–32×) and full-scale ranges from ±39 mV to ±312.5 mV for shunt-based current measurement, plus a third 16-bit multiplexed ADC (ADC2A) supporting 8 analog inputs with programmable gain (1–4×) and ±312.5 mV to ±1.25 V full-scale range for voltage and temperature sensing.
It implements dual independent digital overcurrent comparators with programmable thresholds, internal 8.192 MHz main and diagnostic oscillators (±2.5% accuracy), redundant clock monitoring (MCLK/OSCD fault detection), and comprehensive supply/temperature/oscillation fault detection with sub-µs to 300 µs response times - all validated for ASIL D system-level compliance per ISO 26262.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 24-bit (ADC1A/ADC1B), 16-bit (ADC2A) - enables <1 µV input-referred offset error and <0.65 µVRMS noise at 1 kSPS for high-accuracy shunt current measurement. |
| Data Rate Range | 500 SPS to 64 kSPS - supports both slow thermal monitoring and fast transient overcurrent detection in same device. |
| Reference Voltage | 1.25 V ±0.05% (REFA/REFB) - provides stable, low-drift scaling for all ADC channels and comparators without external reference. |
| Supply Range | APWR/DPWR: 2.9 V to 16 V - allows direct connection to unregulated HV battery rails or DC/DC outputs in EV BMS. |
| Functional Safety | ASIL D hardware & systematic capability per ISO 26262 - includes memory CRC, clock watchdogs, supply monitors, and fault pin with <4 µs response for critical failures. |
| Operating Temperature | –40°C to +105°C ambient - qualified per AEC-Q100 Grade 1, enabling placement in high-heat zones near battery cells or power electronics. |
| Digital Interface | SPI with active-low CSn, DRDYn interrupt, and 8.192 MHz clock support - ensures deterministic timing for synchronized multi-device sampling in distributed BMS architectures. |
Pinout & Package
ADS131B23QPHPRQ1 is housed in a 48-pin HTQFP (PHP) package measuring 9 mm × 9 mm with exposed thermal pad connected to AGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CPA / CPB | ADC1A/ADC1B positive analog input | High-impedance differential inputs for shunt voltage sensing; support ±39 mV to ±312.5 mV full-scale with 1.8 MΩ input impedance. |
| CNA / CNB | ADC1A/ADC1B negative analog input | Matched to CPA/CPB for common-mode rejection >113 dB (with chop enabled); referenced to AGNDA/AGNDB. |
| V0A–V7A | ADC2A analog input channels | 8-channel multiplexer inputs for voltage divider outputs or thermistor nodes; configurable gain (1/2/4×) and sequencer-controlled scanning. |
| GPIO0A–GPIO4/OCCB | General-purpose I/O with PWM/fault output | 9 total GPIOs; GPIO3/OCCA and GPIO4/OCCB provide push-pull overcurrent comparator outputs with <4 µs latency. |
| DRDYn | Data-ready interrupt output | Active-low signal indicating new conversion data ready on SPI bus; synchronizes host MCU read operations. |
| CSn / SCLK / SDI / SDO | SPI interface signals | Standard 4-wire SPI with IOVDD-referenced logic levels; supports daisy-chain configuration for multi-IC BMS stacks. |
| RCAPA / RCAPB | Reference voltage outputs | 1.25 V buffered REFA/REFB outputs; require 1 µF decoupling to AGNDA/AGNDB for stability and low-noise operation. |
| APWR / DPWR | Analog/digital power supplies | Independent 2.9–16 V inputs; APWR powers analog section and AVDD LDO (3.3 V), DPWR powers digital section and IOVDD LDO (3.3 V). |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous 24-bit current ADCs | Enables redundant, time-aligned current measurement across parallel battery strings or dual-shunt configurations for fault-tolerant BMS. |
| Programmable digital overcurrent comparators | Per-ADC fast detection (<4 µs response) with independent threshold registers - eliminates need for external comparators or FPGA logic. |
| Integrated 16-bit multiplexed voltage/temperature ADC | Reduces external component count by consolidating up to 8 cell voltage or NTC thermistor measurements into single IC with automatic channel sequencing. |
| ASIL D–compliant diagnostics | Includes clock frequency watchdogs (MCLK/OSCD), supply UV/OV/oscillation monitors, memory CRC, and open-GND detection - all with documented FMEDA coverage. |
| On-chip LDOs for AVDD and IOVDD | Eliminates need for external 3.3 V regulators; each supplies up to 20 mA with ±1 mV/mA load regulation for stable digital/analog domain separation. |
Applications
| EV Battery Current Monitoring | High-Voltage Pack Voltage Sensing |
|---|---|
|
Use Scenario: Real-time bidirectional current measurement across large-format Li-ion battery modules using precision shunt resistors. IC Role / Device Role / Timing Role: Primary current-sense front-end with simultaneous dual ADC sampling and hardware overcurrent flagging. Use Value: Achieves ±1.5 µV max offset error and 20 ppm/°C gain drift - enabling <0.1% full-scale current accuracy over automotive temperature range. |
Use Scenario: Measuring total pack voltage (up to 1000 V+) via high-ratio resistor dividers in traction battery systems. IC Role / Device Role / Timing Role: High-impedance (15–120 MΩ) ADC2A input with programmable gain for accurate scaled-down voltage acquisition. Use Value: Supports ±1.25 V full-scale range and 16-bit resolution - delivering ~19 µV LSB for precise SOC estimation and cell balancing control. |
| Cell-Level Temperature Monitoring | BMS Fault Detection & Diagnostics |
|
Use Scenario: Reading thermistor or analog-output temperature sensor outputs from individual battery cells or modules. IC Role / Device Role / Timing Role: ADC2A multiplexer with auto-sequencing across 8 inputs, reducing SPI traffic and host CPU overhead. Use Value: Enables concurrent temperature sampling across 8 locations with <30 nV/°C offset drift - critical for thermal runaway prevention. |
Use Scenario: Detecting supply rail faults, clock failures, memory corruption, or open-circuit connections in safety-critical BMS hardware. IC Role / Device Role / Timing Role: Integrated diagnostic engine with dedicated FAULT pin, sub-µs response times, and register-accessible status flags. Use Value: Provides hardware-enforced fault signaling compliant with ASIL D requirements - eliminating software-only monitoring bottlenecks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS131B26QPHPRQ1 | Same 48-pin HTQFP package and ASIL D qualification, but adds third 24-bit ADC channel (ADC1C) and extends ADC2A to 12 inputs. | Supports higher-channel-count BMS designs requiring triple-redundant current sensing or expanded voltage/temperature monitoring. | Select when needing ≥3 simultaneous current channels or >8 analog inputs; otherwise ADS131B23QPHPRQ1 offers optimal cost/performance for dual-shunt systems. |
| MAX17853GCB+T | 18-bit current/voltage ADC, no integrated overcurrent comparators, uses I²C not SPI, rated for –40°C to +105°C only (not Grade 1). | Limited to lower-precision BMS tiers; lacks ASIL D documentation, clock watchdogs, and fast hardware overcurrent detection. | Consider only for non-safety-critical auxiliary battery monitoring where SPI interface and ASIL D compliance are not required. |
Compared with ADS131B23QPHPRQ1, the ADS131B26QPHPRQ1 extends channel count while maintaining pin compatibility and ASIL D readiness, whereas the MAX17853GCB+T trades functional safety and performance for simpler interface and lower resolution - making ADS131B23QPHPRQ1 the balanced choice for mainstream ASIL D-compliant EV BMS front-ends.
Availability
ADS131B23QPHPRQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, EV traction inverters, and high-voltage energy storage systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for ADS131B23QPHPRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive ICs, with decades of experience in high-reliability power management and signal chain solutions.
The ADS131B23QPHPRQ1 belongs to TI's automotive-grade battery monitor product line, engineered specifically for functional safety–compliant EV BMS applications demanding precision, redundancy, and diagnostic rigor in harsh high-voltage environments.
FAQ
What is the operating temperature range of the ADS131B23QPHPRQ1?
The ADS131B23QPHPRQ1 is qualified per AEC-Q100 Grade 1 with an operating ambient temperature range of –40°C to +125°C, and is specified over –40°C to +105°C. This extended range enables reliable deployment in under-hood or battery-pack-adjacent locations where thermal stress is highest. The device maintains full 24-bit ADC performance and ASIL D diagnostic coverage across this range.
Does the ADS131B23QPHPRQ1 support daisy-chained SPI communication?
Yes, the ADS131B23QPHPRQ1 supports daisy-chained SPI configuration using its SDO and SDI pins. In this mode, multiple ADS131B23QPHPRQ1 devices share a single CSn line and clock, with conversion data cascading serially - enabling scalable BMS architectures with minimal MCU GPIO usage and synchronized sampling across all devices.
How does the ADS131B23QPHPRQ1 implement functional safety for ASIL D compliance?
The ADS131B23QPHPRQ1 achieves ASIL D hardware and systematic capability through integrated diagnostics including dual clock monitoring (MCLK/OSCD watchdogs), supply rail monitors (UV/OV/oscillation detection), memory map and register CRC checks, open-GND detection, and fault pin assertion with guaranteed <4 µs response. All features are documented in TI's ISO 26262 safety manual for system-level integration.
What are the key differences between ADC1A/ADC1B and ADC2A on the ADS131B23QPHPRQ1?
ADC1A and ADC1B are simultaneous-sampling 24-bit delta-sigma converters optimized for high-precision current shunt measurement (±39 mV to ±312.5 mV FSR, 20 ppm/°C gain drift). ADC2A is a 16-bit multiplexed SAR-style converter with 8 inputs, programmable gain (1–4×), and ±312.5 mV to ±1.25 V FSR - designed for lower-bandwidth voltage and temperature sensing with automatic channel sequencing.
Can the ADS131B23QPHPRQ1 directly drive external MOSFETs or relays?
No, the ADS131B23QPHPRQ1 GPIOs are digital I/Os with push-pull outputs rated for ±1 mA (GPIO0A/GPIO1A/B) or ±1 mA (other GPIOs), insufficient for direct MOSFET/relay driving. However, GPIO3/OCCA and GPIO4/OCCB provide fast (<4 µs) overcurrent fault signals intended to trigger external protection circuitry or isolate switches - requiring external drivers or gate drivers for power-stage control.
ADS131B23QPHPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Battery Management
- Current - Supply:
- 4.8mA
- Voltage - Supply:
- 2.9V ~ 16V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-HTQFP (7x7)
ADS131B23QPHPRQ1 FAQ
1.How can I place an order for ADS131B23QPHPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS131B23QPHPRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS131B23QPHPRQ1 reliable?
The price and inventory of ADS131B23QPHPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS131B23QPHPRQ1 is usually 5 days.
3.What payment methods are accepted for ADS131B23QPHPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS131B23QPHPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS131B23QPHPRQ1?
ADS131B23QPHPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS131B23QPHPRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS131B23QPHPRQ1?
For technical support, including ADS131B23QPHPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS131B23QPHPRQ1 requirements.
6.How does Aetrix verify that ADS131B23QPHPRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS131B23QPHPRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS131B23QPHPRQ1 meets industry standards.
7.What is the process for return or replacement of ADS131B23QPHPRQ1?
All ADS131B23QPHPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS131B23QPHPRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS131B23QPHPRQ1 part is unused and in its original packaging.
Return procedure for ADS131B23QPHPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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