ADS131B24-Q1 Series

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

Catalog

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

Part	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Applications	Supplier Device Package	Mounting Type	Grade	Current - Supply	Qualification	Voltage - Supply [Max]	Voltage - Supply [Min]
Texas Instruments ADS131B24QPHPRQ1	48-PowerTQFP	-40 °C	125 °C	Battery Management	48-HTQFP (7x7)	Surface Mount	Automotive	5.3 mA	AEC-Q100	16 V	2.9 V

Catalog

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

Key Features

• AEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +125°C, TAFunctional Safety-CompliantDeveloped for functional safety applicationsDocumentation available to aid ISO 26262 functional safety system design up to ASIL DSystematic capability up to ASIL DHardware capability up to ASIL DTwo simultaneous-sampling, 24-bit ADCs (ADC1A, ADC1B) for current-shunt measurements:Programmable full-scale range:±39mV to ±312.5mVSupports a wide range of shunt resistor values and current-measurement rangesAchieve high-accuracy current-shunt measurements with:Offset error: ±1.5µV (max)Gain drift: 20ppm/°C (max)Programmable data rate: 500SPS to 64kSPSDigital overcurrent comparator per ADC with programmable thresholds for fast overcurrent detectionTwo multiplexed, 16-bit ADCs (ADC2A, ADC2B) for voltage and temperature measurements:8 analog inputs per ADCProgrammable full-scale range:±312.5mV to ±1.25VChannel sequencerMonitoring and diagnostic features to mitigate and detect random hardware faultsSupply-voltage range: 2.9V to 16VSPI-compatible interface9 GPIOs with PWM capabilityAEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +125°C, TAFunctional Safety-CompliantDeveloped for functional safety applicationsDocumentation available to aid ISO 26262 functional safety system design up to ASIL DSystematic capability up to ASIL DHardware capability up to ASIL DTwo simultaneous-sampling, 24-bit ADCs (ADC1A, ADC1B) for current-shunt measurements:Programmable full-scale range:±39mV to ±312.5mVSupports a wide range of shunt resistor values and current-measurement rangesAchieve high-accuracy current-shunt measurements with:Offset error: ±1.5µV (max)Gain drift: 20ppm/°C (max)Programmable data rate: 500SPS to 64kSPSDigital overcurrent comparator per ADC with programmable thresholds for fast overcurrent detectionTwo multiplexed, 16-bit ADCs (ADC2A, ADC2B) for voltage and temperature measurements:8 analog inputs per ADCProgrammable full-scale range:±312.5mV to ±1.25VChannel sequencerMonitoring and diagnostic features to mitigate and detect random hardware faultsSupply-voltage range: 2.9V to 16VSPI-compatible interface9 GPIOs with PWM capability

Description

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 16V 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 16V 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.