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ADS131B2X-C-EXAMPLE-CODE — ADS131B2x example C code
Expedite your ADS131B2x firmware development with this example C code from Texas Instruments
ADS131B26-Q1
Automotive high-voltage battery-pack monitor with six ADC channels for current and voltage sensing
Data sheet
ADS131B26-Q1
- AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to +125°C, TA
- Functional Safety-Compliant targeted
- Developed for functional safety applications
- Documentation to aid ISO 26262 system design will be available upon production release
- Systematic capability up to ASIL D targeted
- Hardware capability up to ASIL D targeted
- Two simultaneous-sampling, 24-bit ADCs (ADC1A, ADC1B) for current shunt measurement
- Programmable data rate: 500 SPS to 64 kSPS
- Programmable full-scale range: ±39 mV to ±312.5 mV
- Offset error (global-chop mode): 2 µV (max)
- Gain drift: 15 ppm/°C (max)
- Digital overcurrent comparator with programmable thresholds and deglitch times per ADC
- Two simultaneous-sampling, 24-bit ADCs (ADC3A, ADC3B) for voltage measurement
- Programmable data rate: 500 SPS to 64 kSPS
- Programmable full-scale range: ±312.5 mV to ±1.25 V
- Two multiplexed, 16-bit ADCs (ADC2A, ADC2B) for voltage and temperature measurement
- Eight input channels per ADC
- Programmable full-scale range: ±312.5 mV to ±1.25 V
- Channel autosequencer
The ADS131B26-Q1 is a complete analog front-end (AFE) for automotive electrical vehicle (EV) battery management systems (BMS) that 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 overcurrent detection comparators work in parallel to the two ADCs for fast overcurrent detection.
Another set of two simultaneous-sampling, 24-bit ADCs (ADC3A, ADC3B) is integrated to measure battery pack voltage using external high-voltage resistor dividers synchronously to the battery current for accurate state-of-charge and state-of-health battery calculations.
Additional two, multiplexed, 16-bit ADC channels (ADC2A, ADC2B) are available to measure shunt temperature using external temperature sensors, such as thermistors or analog output temperature sensors, as well as other voltages in the system.
A multitude of monitoring and diagnostic features are integrated in the device to mitigate and detect random hardware faults to aid in the development of functional safe BMS.
The ADS131B26-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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Technical documentation
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View all 3 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | ADS131B26-Q1 Current, Voltage, and Temperature Measurement Automotive Analog Front-End for Battery Management Systems datasheet | PDF | HTML | 21 Sep 2022 |
| Certificate | ADS131B26Q1EVM-PDK EU RoHS Declaration of Conformity (DoC) | 29 Sep 2022 | ||
| Technical article | Leverage coherent sampling and FFT windows when evaluating SAR ADCs (Part 1) | 13 Mar 2015 |
Design & development
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Evaluation board
ADS131B26Q1EVM-PDK — ADS131B26 performance demonstration kit for six-ADC-channel high-voltage SPI battery-pack monitor
The ADS131B26-Q1 evaluation module (EVM) performance demonstration kit (PDK) is a complete evaluation and demonstration platform that combines the ADS131B26Q1EVM and a precision host interface (PHI) controller board. The PHI controller board allows the ADS131B26Q1EVM to connect to a computer via a (...)
Calculation tool
ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and (...)
Calculation tool
ANALOG-ENGINEER-CALC — Analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool
TINA-TI — SPICE-based analog simulation program
TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
| Package | Pins | Download |
|---|---|---|
| HTQFP (PHP) | 48 | View options |
Ordering & quality
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