The ADS131B23-Q1 is a fully integrated, high-voltage battery pack monitor for
automotive electrical vehicle (EV) battery management systems (BMS).
The ADS131B23-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.
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-Q1 is offered in a 48-pin HTQFP package and is specified over
the automotive temperature range of –40°C to +105°C.
The ADS131B23-Q1 is a fully integrated, high-voltage battery pack monitor for
automotive electrical vehicle (EV) battery management systems (BMS).
The ADS131B23-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.
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-Q1 is offered in a 48-pin HTQFP package and is specified over
the automotive temperature range of –40°C to +105°C.