Automotive, two-channel, 24-bit, 64-kSPS simultaneous-sampling delta-sigma ADC

The ADS131M02-Q1 is a two-channel, simultaneously sampling, 24-bit, delta-sigma

(ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range and low

power, making the device designed for automotive battery management systems (BMS).

The ADC inputs can be directly interfaced to shunt resistors for bidirectional

battery-current measurements, to resistor-divider networks for high-voltage

measurements, or to temperature sensors (such as thermistors or analog output

temperature sensors).

The individual ADC channels can be

independently configured depending on the sensor input. A low-noise, programmable

gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level

signals. Additionally, this device integrates channel-to-channel phase calibration

and offset and gain calibration registers to help remove signal-chain errors.

A low-drift, 1.2-V reference is

integrated into the device, reducing printed circuit board (PCB) area. Optional

cyclic redundancy checks (CRCs) on the data input, data output, and register map

maintain communication integrity.

The complete analog front-end (AFE) is

offered in a 20-pin TSSOP package and is specified over the automotive temperature

range of –40°C to +125°C.