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Texas Instruments ADS131M02QPWRQ1
- Part No.:
- ADS131M02QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS131M02QPWRQ1.pdf
- Description:
- AUTOMOTIVE, TWO-CHANNEL, 24-BIT,
- Quantity:
- Payment:
- Shipping:
Inventory:1,089
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Product details
Overview
ADS131M02QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) automotive-qualified, 2-channel, simultaneous-sampling, 24-bit delta-sigma ADC with programmable gain up to 128, 102-dB dynamic range at 4 kSPS/gain=1, 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 ADS131M02QPWRQ1 datasheet, ADS131M02QPWRQ1 pinout, ADS131M02QPWRQ1 application, or ADS131M02QPWRQ1 equivalent, key selection considerations include simultaneous differential sampling integrity, channel-to-channel phase calibration resolution (244 ns), input impedance ≥1 MΩ at gains ≥8, integrated negative charge pump for sub-ground inputs, and CRC-protected SPI interface for functional safety–capable designs.
Technical Context
The ADS131M02QPWRQ1 implements dual independent ΔΣ modulators with digital decimation filters per channel, enabling true simultaneous sampling without inter-channel skew. Each channel features a programmable gain amplifier (PGA) with eight selectable gains (1–128), global-chop mode for offset drift reduction, and configurable phase delay calibration to compensate for sensor-induced timing mismatches.
It integrates a 1.2-V internal reference (±0.1% initial accuracy, 7.5 ppm/°C drift), analog and digital supplies (2.7–3.6 V AVDD/DVDD), and a negative charge pump allowing absolute input voltages down to AGND –1.3 V. Communication uses SPI (CPOL = 0, CPHA = 1) with DRDY-driven data-ready signaling and optional CRC on register access and data transfers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit delta-sigma - delivers 113 dB dynamic range (20.3 ENOB) at 0.25 kSPS/gain=1, enabling precise detection of microvolt-level shunt voltage variations. |
| Data Rate | Up to 64 kSPS (high-resolution mode, fCLKIN = 8.192 MHz) - supports real-time monitoring of fast transients in EV battery pack cell balancing and DC e-metering. |
| Input Impedance | ≥1 MΩ at gains 8–128 - permits direct connection to high-impedance thermistors or analog temperature sensors without external buffering. |
| Crosstalk | –120 dB - ensures isolation between channels during simultaneous measurement of battery current (AIN0) and pack voltage (AIN1), critical for BMS fault detection. |
| Startup Time | 0.5 ms from supply ramp - enables rapid system wake-up in vehicle power-on sequences and supports low-duty-cycle monitoring modes. |
| Power Consumption | 2.3 mW at 3-V AVDD/DVDD (high-res mode) - reduces thermal load in densely packed automotive ECUs while maintaining 102-dB SNR. |
| ESD Rating | HBM ±2000 V, CDM ±750 V (corner pins) - meets AEC-Q100 stress requirements for under-hood automotive environments. |
Pinout & Package
Package: 20-pin TSSOP (6.50 mm × 4.40 mm), RoHS-compliant, specified for –40°C to +125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0P / AIN0N | Differential analog input channel 0 | Accepts bidirectional shunt current signals; supports ±VREF/gain full-scale range with integrated charge pump enabling sub-ground sensing. |
| AIN1P / AIN1N | Differential analog input channel 1 | Configurable independently for high-voltage resistor-divider networks or thermistor interfaces; phase delay calibration aligns sampling with channel 0. |
| AVDD / AGND | Analog power supply pair | 2.7–3.6 V operation; requires local 1-µF bypass capacitor; AGND must be isolated from DGND (max ±0.3 V difference). |
| DVDD / DGND | Digital I/O power supply pair | Supports 1.8 V (LDO-bypassed) or 3.3 V operation; DVDD shorted to CAP enables internal LDO for noise-sensitive SPI timing. |
| SCLK / DIN / DOUT / CS | SPI serial interface | CPOL=0, CPHA=1 timing; DRDY indicates valid conversion data; CS falling edge initiates frame; CRC optional on all register/data transactions. |
| CLKIN | External master clock input | Accepts 0.3–8.192 MHz (HR mode); determines data rate and OSR; jitter tolerance supports crystal or oscillator sources. |
| SYNC/RESET | Multi-function digital control | Pulse low to reset device or synchronize conversions across multiple ADS131M02QPWRQ1 units in stacked BMS architectures. |
| CAP | LDO regulator output | 220-nF capacitor to DGND required when DVDD is tied to CAP; provides clean 1.8-V supply for digital core when bypassing external DVDD. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling with phase calibration | 244-ns resolution channel-to-channel phase adjustment compensates for PCB trace length mismatches or sensor response delays in multi-sensor BMS stacks. |
| Integrated negative charge pump | Enables differential input signals extending 1.3 V below AGND - eliminates need for dual-supply op-amps when measuring bidirectional shunt currents referenced to ground. |
| Programmable gain amplifier (PGA) | Eight discrete gains (1–128) with ≥1-MΩ input impedance at gains ≥8 - supports direct interfacing to both milliohm shunts and high-Z temperature sensors on same device. |
| CRC protection on SPI interface | Configurable CRC-8 on register writes/reads and data output frames - satisfies ASIL-B functional safety requirements for communication integrity in ISO 26262-compliant BMS designs. |
| Low-drift 1.2-V internal reference | ±0.1% initial accuracy, 7.5 ppm/°C drift, and <4 µV time drift over 1000 hours - reduces calibration frequency and improves long-term measurement stability in ESS deployments. |
Applications
| Automotive Battery Management System (BMS) | EV DC Fast-Charging Station Metering |
|---|---|
|
Use Scenario: Real-time monitoring of cell-string current and pack voltage in 400-V/800-V traction battery packs. IC Role / Device Role / Timing Role: Simultaneously samples shunt-based current (AIN0) and resistor-divider voltage (AIN1) with <244-ns phase alignment to compute instantaneous power and state-of-charge. Use Value: Enables accurate Coulomb counting and thermal runaway prediction via correlated current/voltage transients without inter-channel latency artifacts. |
Use Scenario: Precision energy metering of DC output in CCS/GB/T-compliant EV charging stations. IC Role / Device Role / Timing Role: Digitizes isolated current and voltage sensor outputs with 102-dB DR and <100-ppm gain error to meet IEC 62053-22 Class 0.2 accuracy requirements. Use Value: Eliminates external reference and PGA components, reducing bill-of-materials cost while maintaining metrology-grade linearity over –40°C to +85°C operating range. |
| Energy Storage System (ESS) Rack Monitoring | Onboard Charger (OBC) Current Sensing |
|
Use Scenario: Multi-point voltage and temperature acquisition across lithium-iron-phosphate (LFP) battery racks in grid-scale storage. IC Role / Device Role / Timing Role: Interfaces directly to thermistors (AIN1) and shunt resistors (AIN0) using high-Z inputs and programmable gain, with global-chop mode suppressing thermal drift. Use Value: Achieves <±175 µV offset error and 300 nV/°C drift - extends recalibration intervals to >12 months in uncooled outdoor enclosures. |
Use Scenario: Bidirectional AC/DC current measurement in silicon-carbide (SiC) based onboard chargers during regenerative braking and grid charging. IC Role / Device Role / Timing Role: Samples differential shunt signals with sub-ground capability (via charge pump) and 64-kSPS data rate to capture high-frequency switching ripple. Use Value: Supports closed-loop current control bandwidths >10 kHz without aliasing, improving OBC efficiency and reducing EMI filter size. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, automotive-grade, multi-channel delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS131B02QPWRQ1 | Lower power (1.4 mW), fixed gain=1 only, no PGA, 100-dB DR at 4 kSPS, no phase calibration | Targeted at cost-optimized BMS where only basic current sensing is required; lacks flexibility for mixed-signal (current + voltage + temp) acquisition | Select when system uses external amplification and does not require channel synchronization or gain flexibility. |
| AD7779ACPZ | 4-channel, 24-bit, 128-kSPS, ±2.5-V input range, external reference required, no integrated charge pump | Designed for industrial PLCs and medical imaging; lacks AEC-Q100 qualification and automotive temperature range | Consider only for non-automotive applications requiring higher channel count and wider input voltage range, with external reference budget available. |
Compared with ADS131B02QPWRQ1, the ADS131M02QPWRQ1 adds PGA flexibility, phase calibration, and sub-ground sensing - essential for integrated BMS signal chains. Versus AD7779ACPZ, it trades channel count for AEC-Q100 compliance, lower power, and self-contained analog front-end - simplifying design validation for automotive OEMs.
Availability
ADS131M02QPWRQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, EV charging station metering, and energy storage system rack monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS131M02QPWRQ1 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 decades of automotive IC design expertise and rigorous AEC-Q100 qualification infrastructure.
The ADS131M02QPWRQ1 belongs to TI's precision delta-sigma ADC portfolio engineered specifically for functional safety–compliant, high-reliability automotive sensing - emphasizing simultaneous sampling integrity, low drift, and integrated signal conditioning for next-generation electric vehicle power systems.
FAQ
What is the maximum achievable data rate for ADS131M02QPWRQ1 in high-resolution mode?
The ADS131M02QPWRQ1 achieves up to 64 kSPS in high-resolution mode when configured with fCLKIN = 8.192 MHz. This rate applies to each of the two simultaneously sampled channels and maintains 24-bit resolution with 102-dB dynamic range at gain = 1 and 4 kSPS - scaling linearly with oversampling ratio adjustments for noise-performance trade-offs.
Does ADS131M02QPWRQ1 support direct connection to thermistors without external amplification?
Yes, ADS131M02QPWRQ1 supports direct thermistor interfacing via its high-input-impedance PGA: at gains ≥8, input impedance exceeds 1 MΩ, minimizing loading errors on high-Z NTC/PTC elements. Its 1.2-V internal reference and programmable gain allow full-scale optimization for typical thermistor voltage divider outputs across –40°C to +125°C.
How does the integrated negative charge pump in ADS131M02QPWRQ1 benefit BMS current sensing?
The integrated negative charge pump in ADS131M02QPWRQ1 enables differential input voltages extending 1.3 V below AGND, allowing direct measurement of bidirectional shunt currents using a single 3.3-V supply - eliminating external level-shifting circuitry, reducing component count, and improving noise immunity in compact automotive BMS modules.
Is ADS131M02QPWRQ1 compatible with functional safety standards such as ISO 26262?
Yes, ADS131M02QPWRQ1 is functional safety-capable with documentation available for ASIL-B system integration. Key enablers include CRC-protected SPI, DRDY-monitored data validity, global-chop mode for drift mitigation, and AEC-Q100 Grade 1 qualification - supporting systematic fault coverage analysis in ISO 26262-compliant BMS hardware architectures.
What package type and thermal performance does ADS131M02QPWRQ1 use?
ADS131M02QPWRQ1 uses a 20-pin TSSOP package (6.50 mm × 4.40 mm) with RθJA = 94.9°C/W. Its thermal design supports operation at +125°C ambient in automotive under-hood locations, validated by junction-to-board (RθJB = 46.4°C/W) and junction-to-case (RθJC(top) = 34.9°C/W) metrics - enabling reliable deployment without forced airflow in sealed ECU enclosures.
ADS131M02QPWRQ1 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):
- 64k
- Number of Inputs:
- 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 2
- Architecture:
- Sigma-Delta
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2.4V ~ 3.6V, 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 1.65V ~ 2V, 2.7V ~ 3.6V
- Features:
- Internal Oscillator, PGA, Simultaneous Sampling, Temperature Sensor
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS131M02QPWRQ1 FAQ
1.How can I place an order for ADS131M02QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS131M02QPWRQ1 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 ADS131M02QPWRQ1 reliable?
The price and inventory of ADS131M02QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS131M02QPWRQ1 is usually 5 days.
3.What payment methods are accepted for ADS131M02QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS131M02QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS131M02QPWRQ1?
ADS131M02QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS131M02QPWRQ1 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 ADS131M02QPWRQ1?
For technical support, including ADS131M02QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS131M02QPWRQ1 requirements.
6.How does Aetrix verify that ADS131M02QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS131M02QPWRQ1 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 ADS131M02QPWRQ1 meets industry standards.
7.What is the process for return or replacement of ADS131M02QPWRQ1?
All ADS131M02QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS131M02QPWRQ1, 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 ADS131M02QPWRQ1 part is unused and in its original packaging.
Return procedure for ADS131M02QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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