ADS131M02 — Datasheet Summary, Specs & Alternatives

01 — Overview

This Texas Instruments datasheet covers the ADS131M02, a 2-channel, simultaneously-sampling, 24-bit delta-sigma ADC designed for energy metering and power metrology. Key features include a dynamic range of 102 dB at 4 kSPS, programmable data rates up to 64 kSPS, and gains from 1 to 128. The device offers high-impedance inputs for direct sensor connection, integrated channel-to-channel phase calibration, and an internal 1.2-V reference. It supports current-detect mode for tamper detection and operates over an industrial temperature range of -40°C to +125°C in a 20-pin package.

02 — Key specifications

Datasheet parameters

Parameter	Min	Typ	Max	Conditions
quiescent current	—	1.8 mA	2.15 mA	High-resolution mode
supply voltage range	1.65 V	—	3.6 V
input offset voltage drift	—	300 nV/°C	—
cmrr	—	100 dB	—	At dc
operating temperature	-40 °C	—	125 °C
clock frequency	300 kHz	8.19 MHz	8.4 MHz	High-resolution mode
power dissipation	—	6.2 mW	—	High-resolution mode
input bias current	—	600 nA	—	Gain = 1, 2, or 4, VINP = VINN = 0 V, IB = (IBP+ IBN) / 2
propagation delay	—	—	50 ns
psrr	—	75 dB	—	AVDD at dc
adc resolution	—	24 bit	—
operate time	—	250 µs	—	Measured from supplies at 90% to first\overline{DRDY}rising edge
sample rate	250 Hz	—	64 kHz
settling time	—	323 µs	—
channel count	—	2	—

03 — Alternatives

Closest matches to ADS131M02

ADS131M02IPWR 3.6× lower settling time, 2.0× higher sample rate, 1.2× higher supply voltage range

ADS1255 6.1× higher power dissipation, 3.0× lower input offset voltage drift, 1.3× lower operating temperature

PCM1808 10.0× higher power dissipation, 4.8× higher quiescent current, 1.9× higher supply voltage range

AD7124-8BBCPZ 13.3× lower clock frequency, 6.6× lower supply voltage range, 1.7× lower sample rate

ADS1114 6.9× lower power dissipation, 3.6× higher settling time, 2.1× higher supply voltage range

AD7682BCBZ-RL7 15.5× higher settling time, 7.8× higher sample rate, 2.0× higher power dissipation

AD7190BRUZ 13.4× lower sample rate, 1.9× higher supply voltage range, 1.3× lower operating temperature

MCP3002 6.2× higher sample rate, 2.6× lower clock frequency, 2.4× lower adc resolution

04 — FAQ

Frequently asked questions

What is the ADC resolution of the ADS131M02?

The ADC resolution is 24 bit.

What is the channel count of the ADS131M02?

The channel count is 2.

What is the clock frequency in High-resolution mode?

The clock frequency is 8.19 MHz in High-resolution mode.

What is the CMRR of the ADS131M02 at dc?

The CMRR is 100 dB at dc.

What is the input bias current when the gain is 1, 2, or 4, VINP = VINN = 0 V, and IB = (IBP+ IBN) / 2?

The input bias current is 600 nA.

What is the input offset voltage drift of the ADS131M02?

The input offset voltage drift is 300 nV/°C.

What is the operate time of the ADS131M02?

The operate time is 250 µs, measured from supplies at 90% to first DRDY rising edge.

What is the maximum operating temperature for the ADS131M02?

The maximum operating temperature is 125 °C.