Support software
ADS131B2X-C-EXAMPLE-CODE — ADS131B2x example C code
Expedite your ADS131B2x firmware development with this example C code from Texas Instruments
ADS131B23
3 ADC channel, SPI, high-voltage battery pack monitor for current and voltage sensing
Data sheet
ADS131B23
- 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: 25 ppm/°C (max)
- Programmable data rate: 500 SPS to 64 kSPS
- Digital overcurrent comparator per ADC with programmable thresholds for fast overcurrent detection
- Programmable full-scale range:
- One multiplexed, 16-bit ADC (ADC2A) for voltage and temperature measurements:
- 8 analog inputs
- 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 ADS131B23 is a complete analog front-end (AFE) for industrial battery management systems (BMS). The device 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 functional safe BMS.
Internal linear regulators with input ranges up to 16 V support powering the device with unregulated DC/DC-converters.
The ADS131B23 is offered in a 48-pin HTQFP package and is specified over the industrial temperature range of –40°C to +105°C.
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Technical documentation
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View all 2 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | ADS131B23 Current, Voltage, and Temperature Measurement Analog Front-End for Industrial Battery Management Systems datasheet | PDF | HTML | 23 Dec 2022 |
| Technical article | Leverage coherent sampling and FFT windows when evaluating SAR ADCs (Part 1) | 13 Mar 2015 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
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Simulation tool
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Simulation tool
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User guide: PDF
| Package | Pins | Download |
|---|---|---|
| HTQFP (PHP) | 48 | View options |
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