ADS131B02QPWRQ1

Analog To Digital Converters (ADC) Overview

The ADS131B02-Q1 is an automotive-grade, two-channel, simultaneous-sampling, 24-bit delta-sigma analog-to-digital converter. It operates with analog and digital supplies ranging from 2.7 V to 3.6 V and supports data rates up to 32 kSPS in high-resolution mode. The device features a low-drift internal 1.2-V reference and a programmable gain amplifier (PGA) with gains from 1 to 128. Input-referred noise is specified at 5.42 μVRMS at Gain 1 and 1.29 μVRMS at Gain 8. It includes global-chop mode for offset drift removal, integrated offset and gain calibration registers, and cyclic redundancy checks (CRCs) for communication integrity.

Analog To Digital Converters (ADC) Feature Summary

• AEC-Q100 qualified for Grade 1 temperature range (-40°C to +125°C) and functional safety capable.
• Simultaneous sampling of two differential channels with high-impedance inputs and integrated negative charge pump for below-ground signal measurement.
• Global-chop mode eliminates offset drift over temperature and time, supported by precision internal oscillator and low-drift voltage reference.
• Programmable gain amplifier provides gains from 1 to 128, with independent channel configuration and CRC on communications.

Analog To Digital Converters (ADC) Applications

• EV charging stations for DC e-metering
• Automotive battery management systems (BMS) for current-shunt measurements
• Automotive BMS for voltage measurements using external resistor dividers
• Energy storage systems (ESS)

Analog To Digital Converters (ADC) Procurement Notes

Verify the component against the official Texas Instruments datasheet SBASAA3. Confirm the package type is TSSOP-20 and the operating temperature range covers -40°C to +125°C. Ensure the specific ordering suffix matches the required automotive qualification and pin configuration. Cross-reference the part number with authorized distributors to validate authenticity and supply chain integrity before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this ADC for applications requiring simultaneous sampling of two channels with high precision. It is suitable for bidirectional current sensing via shunt resistors or high-voltage monitoring through resistor dividers. Consider the PGA gain settings and data rate requirements to optimize power consumption versus noise performance. The integrated reference and oscillator reduce external component count, making it ideal for space-constrained automotive designs.

Analog To Digital Converters (ADC) Part Context

The ADS131B02-Q1 belongs to the ADS131B0x-Q1 family of automotive delta-sigma ADCs. It shares architectural similarities with the ADS131M04-Q1 and ADS131B04-Q1 but offers two channels instead of four. This family is designed for cost-sensitive, high-performance automotive applications, providing buffered analog inputs and low power consumption within a compact TSSOP package.

Analog To Digital Converters (ADC) Replacement Considerations

For single-channel requirements, consider the ADS131B02-Q1's non-automotive counterpart or other TI ADCs. For four-channel needs, the ADS131B04-Q1 is the direct family member. Verify pin compatibility and software register maps when substituting with other ADS131 series devices.