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ADS131B24-Q1

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Automotive high-voltage battery-pack monitor with four ADC channels for current and voltage sensing

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Data sheet

ADS131B24-Q1

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 24 Sample rate (max) (ksps) 64 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Pseudo-Differential, Single-ended Multichannel configuration Simultaneous Sampling Rating Automotive TI functional safety category Functional Safety-Compliant Reference mode Internal Input voltage range (max) (V) 2.4 Input voltage range (min) (V) -0.3 Features Comparator, GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 37.5 Analog supply (min) (V) 2.9 Analog supply voltage (max) (V) 16 Digital supply (min) (V) 2.9 Digital supply (max) (V) 16
Resolution (Bits) 24 Sample rate (max) (ksps) 64 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Pseudo-Differential, Single-ended Multichannel configuration Simultaneous Sampling Rating Automotive TI functional safety category Functional Safety-Compliant Reference mode Internal Input voltage range (max) (V) 2.4 Input voltage range (min) (V) -0.3 Features Comparator, GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 37.5 Analog supply (min) (V) 2.9 Analog supply voltage (max) (V) 16 Digital supply (min) (V) 2.9 Digital supply (max) (V) 16
HTQFP (PHP) 48 81 mm² 9 x 9
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, T A
  • Functional Safety-Compliant
  • Two simultaneous-sampling, 24-bit ADCs (ADC1A, ADC1B) for current-shunt measurements:
    • Programmable full-scale range:
      • ±39 mV to ±312.5 mV
      • Supports a wide range of shunt resistor values and current-measurement ranges
    • Achieve high-accuracy current-shunt measurements with:
      • Offset error: ±1.5 µV (max)
      • Gain drift: 20 ppm/°C (max)
    • Programmable data rate: 500 SPS to 64 kSPS
    • Digital overcurrent comparator per ADC with programmable thresholds for fast overcurrent detection
  • Two multiplexed, 16-bit ADCs (ADC2A, ADC2B) for voltage and temperature measurements:
    • 8 analog inputs per ADC
    • Programmable full-scale range: ±312.5 mV to ±1.25 V
    • Channel sequencer
  • Monitoring and diagnostic features to mitigate and detect random hardware faults
  • Supply-voltage range: 2.9 V to 16 V
  • SPI-compatible interface
  • 9 GPIOs with PWM capability
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, T A
  • Functional Safety-Compliant
  • Two simultaneous-sampling, 24-bit ADCs (ADC1A, ADC1B) for current-shunt measurements:
    • Programmable full-scale range:
      • ±39 mV to ±312.5 mV
      • Supports a wide range of shunt resistor values and current-measurement ranges
    • Achieve high-accuracy current-shunt measurements with:
      • Offset error: ±1.5 µV (max)
      • Gain drift: 20 ppm/°C (max)
    • Programmable data rate: 500 SPS to 64 kSPS
    • Digital overcurrent comparator per ADC with programmable thresholds for fast overcurrent detection
  • Two multiplexed, 16-bit ADCs (ADC2A, ADC2B) for voltage and temperature measurements:
    • 8 analog inputs per ADC
    • Programmable full-scale range: ±312.5 mV to ±1.25 V
    • Channel sequencer
  • Monitoring and diagnostic features to mitigate and detect random hardware faults
  • Supply-voltage range: 2.9 V to 16 V
  • SPI-compatible interface
  • 9 GPIOs with PWM capability

The ADS131B24-Q1 is a fully integrated, high-voltage battery pack monitor for automotive electrical vehicle (EV) battery management systems (BMS).

The ADS131B24-Q1 integrates two simultaneous-sampling, high-precision, 24-bit ADC channels (ADC1A, ADC1B) to redundantly measure battery current with high resolution and accuracy using an external shunt resistor. Two independent digital comparators enable fast overcurrent detection in parallel with the two ADCs.

Additional two, multiplexed, 16-bit ADC channels (ADC2A, ADC2B) are available to measure shunt temperature and other voltages in the system, such as battery-pack voltage, using external high-voltage resistor dividers. Shunt temperature is measured using an external temperature sensor, such as a thermistor or an analog output temperature sensor. Each ADC is equipped with a channel sequencer that automatically steps through the configured multiplexer inputs to reduce communication on the SPI.

The device integrates many monitoring and diagnostic features to mitigate and detect random hardware faults to aid in the development of functionally safe BMS.

Internal linear regulators with input ranges up to 16 V support powering the device with unregulated DC/DC-converters.

The ADS131B24-Q1 is offered in a 48-pin HTQFP package and is specified over the automotive temperature range of –40°C to +105°C.

The ADS131B24-Q1 is a fully integrated, high-voltage battery pack monitor for automotive electrical vehicle (EV) battery management systems (BMS).

The ADS131B24-Q1 integrates two simultaneous-sampling, high-precision, 24-bit ADC channels (ADC1A, ADC1B) to redundantly measure battery current with high resolution and accuracy using an external shunt resistor. Two independent digital comparators enable fast overcurrent detection in parallel with the two ADCs.

Additional two, multiplexed, 16-bit ADC channels (ADC2A, ADC2B) are available to measure shunt temperature and other voltages in the system, such as battery-pack voltage, using external high-voltage resistor dividers. Shunt temperature is measured using an external temperature sensor, such as a thermistor or an analog output temperature sensor. Each ADC is equipped with a channel sequencer that automatically steps through the configured multiplexer inputs to reduce communication on the SPI.

The device integrates many monitoring and diagnostic features to mitigate and detect random hardware faults to aid in the development of functionally safe BMS.

Internal linear regulators with input ranges up to 16 V support powering the device with unregulated DC/DC-converters.

The ADS131B24-Q1 is offered in a 48-pin HTQFP package and is specified over the automotive temperature range of –40°C to +105°C.
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* Data sheet ADS131B24-Q1 Automotive, High-Voltage Battery Pack Monitor With SPI and4 ADC Channels for Voltage, Current, and Temperature Sensing datasheet PDF | HTML 27 Jul 2023
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 Mar 2023

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