ADS131B23 Series

3 ADC channel, SPI, high-voltage battery pack monitor for current and voltage sensing

Catalog

3 ADC channel, SPI, high-voltage battery pack monitor for current and voltage sensing

Part	Number of Bits	Supplier Device Package	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]	Architecture	Mounting Type	Sampling Rate (Per Second)	Reference Type	Input Type	Features	Operating Temperature [Min]	Operating Temperature [Max]	Configuration	Ratio - S/H:ADC	Number of Inputs	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Package / Case	Data Interface
Texas Instruments ADS131B23PHPR	24	48-HTQFP (7x7)	2.9 V 4 V	5.5 V 16 V	Sigma-Delta	Surface Mount	64k	Internal	Pseudo-Differential Single Ended	Internal Oscillator PGA Simultaneous Sampling	-40 °C	125 °C	MUX-PGA-ADC	0:3	8	2.9 V 4 V	3.6 V 16 V	48-TQFP Exposed Pad	SPI

Catalog

3 ADC channel, SPI, high-voltage battery pack monitor for current and voltage sensing

Key Features

• Two simultaneous-sampling, 24-bit ADCs (ADC1A, ADC1B) for current-shunt measurementsProgrammable 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 detectionOne multiplexed, 16-bit ADC (ADC2A) for voltage and temperature measurements:8 analog inputsProgrammable 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 capabilityTwo simultaneous-sampling, 24-bit ADCs (ADC1A, ADC1B) for current-shunt measurementsProgrammable 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 detectionOne multiplexed, 16-bit ADC (ADC2A) for voltage and temperature measurements:8 analog inputsProgrammable 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 ADS131B23 is a fully integrated, high-voltage, battery-pack monitor for industrial battery management systems (BMS). The ADS131B23 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. An additional multiplexed, 16-bit ADC (ADC2A) is 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. ADC2A 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 ADS131B23 is offered in a 48-pin HTQFP package and is specified over the automotive temperature range of –40°C to +105°C. The ADS131B23 is a fully integrated, high-voltage, battery-pack monitor for industrial battery management systems (BMS). The ADS131B23 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. An additional multiplexed, 16-bit ADC (ADC2A) is 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. ADC2A 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 ADS131B23 is offered in a 48-pin HTQFP package and is specified over the automotive temperature range of –40°C to +105°C.