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Texas Instruments ADS131M06QPBSRQ1
- Part No.:
- ADS131M06QPBSRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-TQFP
- Datasheet:
-
ADS131M06QPBSRQ1.pdf
- Description:
- AUTOMOTIVE, SIX-CHANNEL, 24-BIT,
- Quantity:
- Payment:
- Shipping:
Inventory:934
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Product details
Overview
ADS131M06QPBSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade, 6-channel, 24-bit delta-sigma ADC with simultaneous sampling, 32-kSPS maximum data rate, programmable gain up to 128, and integrated 1.2-V low-drift reference-designed for high-accuracy current, voltage, and temperature sensing in battery management systems.
For engineers reviewing the ADS131M06QPBSRQ1 datasheet, ADS131M06QPBSRQ1 pinout, ADS131M06QPBSRQ1 application, or ADS131M06QPBSRQ1 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, automotive-grade functional safety support, and two confirmed alternative parts for BMS and e-metering designs.
Technical Context
The ADS131M06QPBSRQ1 implements six independent delta-sigma modulators with synchronized sampling clocks and per-channel digital decimation filters, enabling true simultaneous acquisition across all six differential inputs. Its architecture includes a programmable gain amplifier (PGA) with eight discrete gain settings (1–128), channel-to-channel phase delay calibration (244-ns resolution), and integrated negative charge pump supporting input signals down to AGND –1.3 V.
It features CRC protection on SPI communications and register map, global-chop mode for offset drift reduction, and three scalable power modes (high-resolution, low-power, very-low-power) that maintain identical noise performance at matched OSR/gain settings while scaling data rate and supply current. The device operates from 2.7–3.6 V AVDD and 1.65–3.6 V DVDD, with analog/digital ground isolation specified to ±0.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit delta-sigma output - delivers 102-dB dynamic range at gain=1/4-kSPS, enabling 16.5+ effective bits for precision shunt-current measurement. |
| Data Rate | Up to 32 kSPS per channel in high-resolution mode - supports real-time cell-voltage monitoring in fast-charging EV BMS with <100-µs inter-sample jitter. |
| Input Impedance | ≥1-MΩ at gains ≥8 - allows direct connection to thermistors and analog-output temperature sensors without external buffering. |
| Crosstalk | –120 dB between channels - ensures accurate multi-cell voltage measurements in stacked battery packs without signal coupling errors. |
| Power Consumption | 4.9 mW total at 3-V supplies and 32-kSPS - enables thermally constrained placement near battery cells in compact BMS modules. |
| Reference | Integrated 1.2-V low-drift reference (8 ppm/°C) - eliminates external reference IC and associated PCB area, reducing BOM count and layout complexity. |
| Startup Time | 0.5 ms from supply ramp to first DRDY - meets automotive fast-wake requirements for pre-charge and fault-detection sequences. |
Pinout & Package
ADS131M06QPBSRQ1 is housed in a 32-pin TQFP package (5.00 mm × 5.00 mm body size) with exposed thermal pad, rated for –40°C to +125°C ambient operation and qualified to AEC-Q100 Grade 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0P–AIN5P / AIN0N–AIN5N | Differential analog inputs (6 channels) | Accept bidirectional shunt-current signals or resistor-divider–scaled high-voltage battery strings; support ±1.3-V common-mode range below AGND via integrated charge pump. |
| AVDD, AGND, DVDD, DGND | Analog/digital power and ground rails | Separate analog/digital domains with ≤0.3-V ground offset tolerance - critical for noise isolation in mixed-signal BMS PCB layouts. |
| SCLK, DIN, DOUT, CS, DRDY | SPI interface signals | CPOL=0/CPHA=1 timing compliant; DRDY active-low pulse indicates valid conversion data ready for readout - enables deterministic firmware synchronization. |
| SYNC/RESET | Global synchronization or hard reset | Configurable as synchronization trigger (1–2047×CLKIN pulse width) or system reset (≥2048×CLKIN) - supports time-aligned sampling across multiple ADCs in distributed BMS. |
| XTAL1/CLKIN, XTAL2 | Master clock input/output | Accepts 2.048–8.192 MHz external crystal or CMOS clock; XTAL2 provides oscillator excitation - enables precise timing control for phase-calibrated sampling. |
| REFIN | External reference input | Accepts 1.1–1.3 V external reference; bypass capacitor prohibited in current-detect mode - preserves accuracy when using internal 1.2-V reference. |
| CAP | Digital LDO output | Provides regulated 1.8-V supply for DVDD when CAP tied to DVDD; requires 220-nF capacitor to DGND - simplifies dual-supply generation in 3.3-V systems. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling | Eliminates inter-channel skew in multi-cell voltage monitoring - essential for accurate state-of-charge (SoC) and state-of-health (SoH) calculation in series-connected battery stacks. |
| Programmable channel phase delay | 244-ns resolution calibration compensates for sensor cable length mismatches or external filter group delay - improves end-to-end timing fidelity in distributed sensing nodes. |
| Cyclic redundancy check (CRC) | Protects SPI command writes, register reads, and conversion data payloads - satisfies ASIL-B functional safety requirements for communication integrity in automotive BMS. |
| High-impedance PGA inputs | Enables direct thermistor connection without op-amp buffer stages - reduces component count, board area, and thermal drift sources in temperature-sensing paths. |
| Integrated negative charge pump | Supports input signals extending 1.3 V below AGND - allows single-supply measurement of bipolar shunt voltages (e.g., ±200 mV) without level-shifting circuitry. |
Applications
| Automotive Battery Management System (BMS) | EV DC E-Metering |
|---|---|
|
Use Scenario: Monitoring individual cell voltages, pack current via shunt, and module temperatures in 400–800-V traction battery packs. IC Role / Device Role / Timing Role: Simultaneous-sampling 24-bit ADC acquiring six differential inputs per conversion cycle with <100-ns inter-channel skew. Use Value: Enables real-time SoC estimation with <0.1% full-scale error across –40°C to +125°C, meeting ISO 26262 ASIL-C diagnostic coverage targets. |
Use Scenario: High-accuracy energy measurement in DC fast-charging stations using shunt-based current sensing and voltage dividers. IC Role / Device Role / Timing Role: Primary metrology ADC capturing synchronized voltage and current waveforms at 32 kSPS for harmonic analysis up to 50th order. Use Value: Achieves Class 0.2 metering accuracy per IEC 62053-22 with 102-dB dynamic range and –100 dB THD, eliminating need for external calibration components. |
| Energy Storage System (ESS) Rack Monitoring | Automotive Onboard Charger (OBC) Sensing |
|
Use Scenario: Multi-rack ESS with centralized controller acquiring voltage, current, and temperature from parallel battery strings. IC Role / Device Role / Timing Role: Six-channel simultaneous ADC deployed per rack, synchronized via SYNC/RESET to enable time-aligned cross-rack diagnostics. Use Value: Reduces system-level sampling latency by 6× versus multiplexed ADCs - critical for rapid fault isolation during grid-frequency disturbances. |
Use Scenario: Bidirectional current and DC-link voltage sensing in silicon-carbide (SiC) based OBCs operating at >100 kHz switching frequencies. IC Role / Device Role / Timing Role: High-speed metrology front-end providing isolated analog inputs to MCU's closed-loop control algorithm with <0.5-ms startup. Use Value: Supports adaptive dead-time compensation and real-time overcurrent protection with sub-microsecond response latency from fault detection to shutdown. |
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 |
|---|---|---|---|
| ADS131M04QPBSRQ1 | 4-channel variant, identical architecture, same 32-kSPS max rate and 102-dB dynamic range, but lacks two analog input pairs and associated digital resources. | Suitable for cost-optimized 4-cell BMS modules or space-constrained OBC designs where only four sensing channels are required. | Select when channel count can be reduced without compromising functional safety decomposition or diagnostic coverage. |
| AD7779ACPZ | 8-channel, 24-bit, simultaneous-sampling ADC with lower power (3.5 mW), no integrated charge pump, and external reference only - requires additional LDO and reference ICs. | Better suited for industrial ESS or test equipment where extended common-mode range is not needed and board area is less constrained. | Choose when higher channel density is prioritized over single-supply bipolar input capability and BOM simplification. |
Compared with ADS131M06QPBSRQ1, the ADS131M04QPBSRQ1 reduces channel count and PCB footprint while retaining identical automotive qualification and metrology performance per channel; the AD7779ACPZ offers more channels but increases system complexity with external reference and power conditioning requirements.
Availability
ADS131M06QPBSRQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, EV DC charging infrastructure, and energy storage system monitoring requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for ADS131M06QPBSRQ1 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 connectivity technologies, with deep expertise in automotive electronics and functional safety design.
The ADS131M06QPBSRQ1 belongs to TI's automotive-qualified precision ADC portfolio, engineered specifically for high-reliability, low-power, simultaneous-sampling metrology in battery electric vehicle (BEV) and hybrid electric vehicle (HEV) powertrain systems.
FAQ
What is the maximum sampling rate supported by the ADS131M06QPBSRQ1?
The ADS131M06QPBSRQ1 supports a maximum data rate of 32 kSPS per channel in high-resolution mode with fCLKIN = 8.192 MHz. This rate is maintained across all six simultaneously sampled channels without multiplexing delay or inter-channel skew, making it suitable for real-time cell voltage monitoring in fast-charging EV battery packs where timing coherence is critical for SoC algorithms.
Does the ADS131M06QPBSRQ1 include an internal voltage reference?
Yes, the ADS131M06QPBSRQ1 integrates a low-drift 1.2-V reference with 8 ppm/°C temperature coefficient and ±0.1% accuracy at 25°C. This eliminates the need for an external reference IC in most BMS and e-metering applications, reducing BOM cost and PCB area. The REFIN pin remains available for optional external reference use, but capacitance must be omitted if current-detect mode is enabled.
How does the ADS131M06QPBSRQ1 support functional safety compliance in automotive systems?
The ADS131M06QPBSRQ1 is AEC-Q100 Grade 1 qualified and explicitly documented as functional safety-capable, with CRC protection on SPI commands, register maps, and conversion data; configurable global-chop mode for offset drift mitigation; and comprehensive diagnostic registers. TI provides FMEDA reports and safety manuals to support ISO 26262 ASIL-B and ASIL-C system-level certification efforts for battery monitoring applications.
Can the ADS131M06QPBSRQ1 measure signals below ground potential?
Yes, the ADS131M06QPBSRQ1 integrates a negative charge pump that enables absolute input voltages as low as AGND –1.3 V. This allows direct measurement of bidirectional shunt currents (e.g., ±200 mV) using a single 3.3-V supply without external level-shifting circuitry - a key enabler for compact, high-efficiency automotive BMS designs.
What package type and thermal characteristics does the ADS131M06QPBSRQ1 use?
The ADS131M06QPBSRQ1 uses a 32-pin TQFP package (PBS variant) with 5.00 mm × 5.00 mm body size and exposed thermal pad. Its junction-to-ambient thermal resistance (RθJA) is 81.9°C/W, and junction-to-board (RθJB) is 32.7°C/W - validated for operation across –40°C to +125°C ambient, supporting placement directly on battery-module PCBs with minimal heatsinking.
ADS131M06QPBSRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 32k
- Number of Inputs:
- 6
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 6
- Architecture:
- Sigma-Delta
- Reference Type:
- External, 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:
- 32-TQFP (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS131M06QPBSRQ1 FAQ
1.How can I place an order for ADS131M06QPBSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS131M06QPBSRQ1 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 ADS131M06QPBSRQ1 reliable?
The price and inventory of ADS131M06QPBSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS131M06QPBSRQ1 is usually 5 days.
3.What payment methods are accepted for ADS131M06QPBSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS131M06QPBSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS131M06QPBSRQ1?
ADS131M06QPBSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS131M06QPBSRQ1 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 ADS131M06QPBSRQ1?
For technical support, including ADS131M06QPBSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS131M06QPBSRQ1 requirements.
6.How does Aetrix verify that ADS131M06QPBSRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS131M06QPBSRQ1 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 ADS131M06QPBSRQ1 meets industry standards.
7.What is the process for return or replacement of ADS131M06QPBSRQ1?
All ADS131M06QPBSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS131M06QPBSRQ1, 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 ADS131M06QPBSRQ1 part is unused and in its original packaging.
Return procedure for ADS131M06QPBSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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