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Texas Instruments ADS131B04QPWRQ1
- Part No.:
- ADS131B04QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS131B04QPWRQ1.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:796
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Product details
Overview
ADS131B04QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, 4-channel, simultaneous-sampling, 24-bit delta-sigma ADC with programmable gain up to 128, 32-kSPS maximum data rate, and integrated 1.2-V low-drift reference-designed for high-accuracy current-shunt and voltage measurements in battery management systems.
For engineers reviewing the ADS131B04QPWRQ1 datasheet, ADS131B04QPWRQ1 pinout, ADS131B04QPWRQ1 application, or ADS131B04QPWRQ1 equivalent, key selection criteria include simultaneous sampling integrity, global-chop offset drift suppression, crosstalk < –120 dB, input-referred noise of 0.82 µVRMS at 1 kSPS/gain=8, and functional safety documentation support.
Technical Context
The ADS131B04QPWRQ1 implements four independent delta-sigma modulators with digital decimation filters per channel, enabling true simultaneous sampling across all four differential inputs (AIN0–AIN3). It supports three power-scaling modes-high-resolution (32 kSPS), low-power (16 kSPS), and very-low-power (8 kSPS)-each tied to distinct modulator clock frequencies (8.192 MHz / 4.096 MHz / 2.048 MHz).
Its analog front end integrates a high-impedance PGA (gain 1–128), global-chop mode for sub-μV offset drift control, and an integrated negative charge pump enabling input signals down to –0.3 V relative to AGND-critical for bidirectional shunt current sensing with unipolar supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit delta-sigma-enables >110-dB SNR and 15.4-bit effective resolution at OSR=1024/gain=8. |
| Sampling architecture | Simultaneous-sampling across all 4 differential channels-eliminates inter-channel phase skew for coherent BMS voltage/current analysis. |
| Data rate | Up to 32 kSPS in high-resolution mode-supports real-time cell monitoring at ≤31.25-µs sampling intervals. |
| Noise performance | 0.82 µVRMS at 1 kSPS/gain=8-enables ±0.005% full-scale accuracy for 1-mΩ shunt current measurement. |
| Crosstalk | –120 dB-prevents signal coupling between adjacent high-voltage battery string measurements. |
| Reference | Integrated 1.2-V low-drift reference (±0.5% accuracy, 13 ppm/°C drift)-reduces BOM count and PCB area vs. external references. |
| Power supply | 2.7 V to 3.6 V AVDD/DVDD-compatible with standard automotive 3.3-V domains; 5 mW total power at 3.3 V/32 kSPS. |
Pinout & Package
ADS131B04QPWRQ1 is housed in a 20-pin TSSOP package (6.50 mm × 4.40 mm), optimized for thermal performance (RθJA = 91.5°C/W) and automotive layout constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0P–AIN3N (Pins 3,4,5,6,7,8,9,10) | Differential analog inputs | Four fully independent differential input pairs-support direct connection to shunt resistors, resistor dividers, or thermistors without external signal conditioning. |
| AVDD, AGND (Pins 1,2) | Analog supply & ground | Separate analog domain with dedicated 1-µF bypass capacitor-minimizes noise coupling into sensitive ADC front end. |
| DVDD, DGND (Pins 20,19) | Digital I/O supply & ground | Isolated digital rail enables clean SPI communication and reduces digital switching noise impact on analog conversion. |
| SCLK, DIN, DOUT, CS (Pins 14,16,15,12) | SPI interface | Standard CPOL=0/CPHA=1 SPI-supports daisy-chain or multi-device configurations via discrete CS lines. |
| DRDY (Pin 13) | Data ready indicator | Active-low pulse synchronized to conversion completion-enables deterministic firmware timing for data capture. |
| SYNC/RESET (Pin 11) | System synchronization | Single-pin control for multi-device conversion alignment or hard reset-essential for synchronized BMS stack measurements. |
| CLKIN (Pin 17) | External clock input | Accepts 0.3–8.2 MHz clock-enables precise timing control or jitter reduction vs. internal oscillator (8.192 MHz ±0.5%). |
| CAP (Pin 18) | Negative charge pump output | Provides regulated negative bias for input stage-enables true bipolar input range (–0.3 V to AVDD + 0.3 V) with single 3.3-V supply. |
Key Features
| Feature | Design Value |
|---|---|
| Global-chop mode | Reduces offset drift to ≤15 nV/°C (channel 2) and ≤30 nV/°C (other channels)-enables stable µV-level DC measurements over –40°C to +125°C. |
| Integrated negative charge pump | Generates internal negative bias-allows measurement of signals below AGND (down to –0.3 V) without external level-shifting circuitry. |
| CRC protection | Configurable CRC on SPI data frames and register map-detects bit errors in command writes or data reads, supporting ASIL-B functional safety compliance. |
| High-impedance analog inputs | 25 MΩ (chop disabled) to 300 MΩ (chop enabled) differential input impedance-minimizes loading error on high-impedance sensor sources like thermistors. |
| Programmable gain amplifier | 8 selectable gains (1–128)-optimizes dynamic range for diverse inputs: millivolt-level shunt voltages (gain=128) or high-voltage divider outputs (gain=1). |
Applications
| Automotive Battery Management System (BMS) | EV DC Charging Station Metering |
|---|---|
Use Scenario: Real-time monitoring of 48-cell lithium-ion battery pack with simultaneous voltage, current, and temperature acquisition. IC Role / Device Role / Timing Role: Primary analog front-end ADC performing synchronized 24-bit sampling of shunt-based current, resistor-divider voltage, and thermistor temperature channels. Use Value: Simultaneous sampling eliminates inter-channel phase error; global-chop ensures <±4 µV offset stability over temperature-critical for SoC estimation accuracy. | Use Scenario: Precision DC energy metering in EV charging infrastructure requiring Class 0.5 accuracy per IEC 62053-21. IC Role / Device Role / Timing Role: High-accuracy current and voltage digitization engine for revenue-grade e-metering ASICs or microcontroller-based meters. Use Value: 0.82 µVRMS noise and 110-dB SNR enable 0.05% full-scale measurement linearity; CRC-protected SPI ensures data integrity in noisy industrial environments. |
| Energy Storage System (ESS) Monitoring | Automotive Onboard Charger (OBC) Sensing |
Use Scenario: Multi-string grid-scale ESS with distributed voltage/current sensing across parallel battery modules. IC Role / Device Role / Timing Role: Channel-isolated ADC providing galvanically referenced measurements per module, synchronized via SYNC/RESET pin. Use Value: –120 dB crosstalk prevents interference between high-voltage strings; TSSOP package supports compact, thermally robust PCB layouts in confined enclosures. | Use Scenario: Bidirectional current sensing in dual-mode OBC during AC/DC and DC/AC conversion phases. IC Role / Device Role / Timing Role: Dual-role ADC measuring both input AC line current (via current transformer) and output DC battery current (via shunt) with precise time alignment. Use Value: Integrated negative charge pump enables accurate zero-crossing detection and bidirectional current polarity resolution without split supplies-reducing system cost and complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 24-bit simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS131M04-Q1 | Lower power (3.5 mW), no global-chop, higher noise (1.29 µVRMS), same pinout and SPI interface. | Targeted at cost-sensitive BMS where ultra-low offset drift is not required. | Select when power budget is tighter than offset stability requirements; verify long-term drift tolerance in SoC algorithms. |
| AD7799 | 24-bit sigma-delta ADC with 4-channel multiplexed (not simultaneous) sampling, 4.17 Hz max output rate, no automotive qualification. | Suitable for industrial sensor nodes-not for automotive BMS or EV charging where simultaneity and AEC-Q100 are mandatory. | Only consider for non-automotive, low-speed precision applications; lacks simultaneous sampling, functional safety support, and temperature grade. |
Compared with ADS131M04-Q1, ADS131B04QPWRQ1 delivers superior offset stability (<±0.4 µV vs. ±200 µV) and lower noise, justifying its use in high-accuracy SoC estimation; versus AD7799, it provides true simultaneity, automotive qualification, and 7600× faster data rate-making it unsuitable as a drop-in replacement.
Availability
ADS131B04QPWRQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, EV DC charging stations, and energy storage system monitoring requiring stable component supply, AEC-Q100 compliance, and functional safety documentation support.
Supply support for ADS131B04QPWRQ1 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 and embedded processing technologies, with deep expertise in automotive-grade signal chain solutions.
The ADS131B04QPWRQ1 belongs to TI's high-precision, automotive-qualified delta-sigma ADC product line-designed specifically for simultaneous, low-drift, high-SNR sensing in battery monitoring and energy metering applications.
FAQ
What is the maximum data rate supported by the ADS131B04QPWRQ1?
The ADS131B04QPWRQ1 supports up to 32 kSPS in high-resolution mode with an 8.192-MHz master clock. This rate applies per channel under simultaneous-sampling operation. Lower power modes reduce maximum data rates to 16 kSPS (low-power mode) and 8 kSPS (very-low-power mode), scaling linearly with modulator clock frequency.
Does the ADS131B04QPWRQ1 require an external reference voltage?
No, the ADS131B04QPWRQ1 integrates a precision 1.2-V low-drift internal reference with ±0.5% accuracy and 13 ppm/°C drift over –40°C to +125°C. External references are optional and only used if higher absolute accuracy or different reference voltage is required-no external reference is needed for standard automotive BMS operation.
How does the global-chop mode improve measurement stability in the ADS131B04QPWRQ1?
Global-chop mode in the ADS131B04QPWRQ1 actively cancels input-stage offset voltage drift, reducing temperature-dependent offset drift to ≤15 nV/°C (channel 2) and ≤30 nV/°C (channels 0/1/3). This enables stable µV-level DC measurements over the full automotive temperature range, critical for accurate battery state-of-charge calculation without frequent recalibration.
Can the ADS131B04QPWRQ1 measure signals below ground potential?
Yes-the ADS131B04QPWRQ1 integrates a negative charge pump that generates a regulated negative bias at the CAP pin, enabling analog input voltages as low as –0.3 V relative to AGND. This allows true bipolar input range (–0.3 V to AVDD + 0.3 V) using only a single 3.3-V supply-ideal for bidirectional current sensing across shunt resistors.
What functional safety documentation is available for the ADS131B04QPWRQ1?
Texas Instruments provides functional safety documentation for the ADS131B04QPWRQ1 including FMEDA reports, safety manuals, and diagnostic coverage analysis-supporting ISO 26262 ASIL-B development. These documents aid system-level safety case development but do not constitute full ASIL-B certification of the device itself; safety validation remains the responsibility of the end-system integrator.
ADS131B04QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 32k
- Number of Inputs:
- 4
- Input Type:
- Differential
- Data Interface:
- Serial, SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:4
- Number of A/D Converters:
- 4
- Architecture:
- Sigma-Delta
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- Internal Oscillator, PGA, Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS131B04QPWRQ1 FAQ
1.How can I place an order for ADS131B04QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS131B04QPWRQ1 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 ADS131B04QPWRQ1 reliable?
The price and inventory of ADS131B04QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS131B04QPWRQ1 is usually 5 days.
3.What payment methods are accepted for ADS131B04QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS131B04QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS131B04QPWRQ1?
ADS131B04QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS131B04QPWRQ1 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 ADS131B04QPWRQ1?
For technical support, including ADS131B04QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS131B04QPWRQ1 requirements.
6.How does Aetrix verify that ADS131B04QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS131B04QPWRQ1 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 ADS131B04QPWRQ1 meets industry standards.
7.What is the process for return or replacement of ADS131B04QPWRQ1?
All ADS131B04QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS131B04QPWRQ1, 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 ADS131B04QPWRQ1 part is unused and in its original packaging.
Return procedure for ADS131B04QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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