1 Features
• AEC-Q100 qualified for automotive applications:
– Temperature grade 1: –40°C to +125°C, TA
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• 2 simultaneously sampling differential inputs
• Programmable data rate up to 64 kSPS
• Programmable gain up to 128
• Noise performance:
– 102-dB dynamic range at gain = 1, 4 kSPS
– 80-dB dynamic range at gain = 64, 4 kSPS
• Total harmonic distortion: –100 dB
• High-impedance inputs for direct sensor
connection:
– 330-kΩ input impedance for gains of
1, 2, and 4
– ≥1-MΩ input impedance for gains of
8, 16, 32, 64, and 128
• Programmable channel-to-channel phase delay
calibration:
– Resolution = 244 ns, fCLKIN = 8.192 MHz
• Fast start-up: First data within 0.5 ms of supply
ramp
• Integrated negative charge pump allows input
signals below ground
• Crosstalk between channels: –120 dB
• Low-drift internal voltage reference
• Cyclic redundancy check (CRC) on
communications and register map
• Analog and digital supplies: 2.7 V to 3.6 V
• Low-power consumption: 2.3 mW at 3-V AVDD
and DVDD
• Package: 20-pin TSSOP

2 Applications
• Automotive battery management systems (BMS):
– Current-shunt measurements
– Voltage measurements using external resistor
dividers
– Temperature measurements using thermistors
or analog output temperature sensors
• EV charging stations:
– DC e-metering
– AC e-metering
• Energy storage systems (ESS)

3 Description
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 highvoltage
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 lownoise,
programmable gain amplifier (PGA) provides
gains ranging from 1 to 128 to amplify low-level
signals. Additionally, this device integrates channelto-
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.