Build with ADS131M02 — Datasheet Specs & AI Design Help

00 — Overview

What the ADS131M02 does

The ADS131M02 is a two-channel, synchronous-sampling, 24-bit delta-sigma analog-to-digital converter designed for high dynamic range and low power consumption. It supports a programmable data rate up to 64kSPS and a programmable gain up to 128, achieving 102dB dynamic range at low speeds. The device features high-impedance inputs for direct sensor connection, integrated channel-to-channel calibration, and a low-drift 1.2V reference. Typically used in energy meters, protection relays, and power quality monitors, it operates on 2.7V to 3.6V supplies with industrial temperature range. Available in 20-pin TSSOP or WQFN packages, it simplifies PCB design by integrating the analog front end.

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Start building with ADS131M02 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for ADS131M02
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	—	1.8 mA	2.15 mA	High-resolution mode; iavdd; POWER SUPPLY	TI datasheet, p. 7 — 6.5 Electrical Characteristics (continued)
supply voltage range	2.7 V	—	3.6 V	AVDD to AGND, normal operating modes	TI datasheet, p. 5 — over operating ambient temperature range (unless otherwise noted)
input offset voltage drift	—	300 nV/°C	—	ADC PERFORMANCE	TI datasheet, p. 6 — 6.5 Electrical Characteristics
cmrr	—	100 dB	—	At dc; cmrr; ADC PERFORMANCE	TI datasheet, p. 6 — 6.5 Electrical Characteristics
operating temperature	-40 °C	—	125 °C	TEMPERATURE RANGE	TI datasheet, p. 5 — over operating ambient temperature range (unless otherwise noted)
clock frequency	300 kHz	8.19 MHz	8.4 MHz	EXTERNAL CLOCK SOURCE	TI datasheet, p. 5 — over operating ambient temperature range (unless otherwise noted)
power dissipation	—	6.2 mW	—	High-resolution mode; pd; POWER SUPPLY	TI datasheet, p. 7 — 6.5 Electrical Characteristics (continued)
input bias current	—	600 nA	—	Gain = 1, 2, or 4, VINP = VINN = 0 V, IB = (IBP+ IBN) / 2; ib; ANALOG INPUTS	TI datasheet, p. 6 — 6.5 Electrical Characteristics
psrr	—	75 dB	—	AVDD at dc; psrr; ADC PERFORMANCE	TI datasheet, p. 6 — 6.5 Electrical Characteristics
adc resolution	—	24 bit	—		TI datasheet, p. 6 — 6.5 Electrical Characteristics
operate time	—	250 µs	—	Measured from supplies at 90% to first\overline{DRDY}rising edge; tpor; 1.65 V ≤ DVDD ≤ 2.0 V	TI datasheet, p. 8 — over operating ambient temperature range, DOUT load: 20 pF \|\| 100 kΩ (unle…
sample rate	250 Hz	—	64 kHz	High-resolution mode, fCLKIN = 8.192 MHz; fdata; ADC CHARACTERISTICS	TI datasheet, p. 6 — 6.5 Electrical Characteristics
dynamic range	99 dB	102 dB	—	Gain = 1; ADC PERFORMANCE	TI datasheet, p. 6 — 6.5 Electrical Characteristics
settling time	—	323 µs	—	tSETTLE1, fast-settling filter, fCLKIN = 8.192 MHz	TI datasheet, p. 30 — 8.4.2 Fast Startup Behavior
channel count	—	2	—		TI datasheet, p. 1

02 — Alternatives

Closest matches to ADS131M02

ADS131M02IPWR similar adc resolution, similar clock frequency, similar cmrr

ADS1255 6.1× higher power dissipation, 3.0× lower input offset voltage drift, 1.9× lower operating temperature

ADS1220 16.1× lower sample rate, 15.5× lower power dissipation, 2.0× lower clock frequency

HX711 1.9× lower operating temperature, 1.4× higher clock frequency, 1.3× higher psrr

ADS1246 16.1× lower sample rate, 4.6× lower settling time, 3.0× lower clock frequency

CS5530-IS 8.4× lower sample rate, 3.3× higher quiescent current, 1.9× lower operating temperature

ES8388 1.9× lower operating temperature, 1.6× higher sample rate, 1.2× higher clock frequency

MCP3421 11.6× lower quiescent current, 6.0× lower input offset voltage drift, 1.9× lower operating temperature

03 — FAQ

Frequently asked questions

What is the ADC resolution of the ADS131M02?

The ADC resolution is 24 bit.

How many channels does the ADS131M02 have?

The ADS131M02 has a channel count of 2.

What is the maximum clock frequency when using an external clock source?

The maximum clock frequency with an external clock source is 8.19 MHz.

What is the CMRR at DC for ADC performance?

The CMRR is 100 dB at DC for ADC performance.

What is the dynamic range when the gain is set to 1?

The dynamic range is 102 dB under ADC PERFORMANCE conditions with Gain = 1.

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

The input bias current is 600 nA.

What is the input offset voltage drift under ADC PERFORMANCE conditions?

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

What is the operate time (tpor) measured from supplies at 90% to the first DRDY rising edge when 1.65 V ≤ DVDD ≤ 2.0 V?

The operate time is 250 µs.

What is the maximum operating temperature for the ADS131M02?

The maximum operating temperature is 125 °C under the TEMPERATURE RANGE condition.

What is the power dissipation in High-resolution mode with pd; POWER SUPPLY?

The power dissipation is 6.2 mW.

What is the PSRR when AVDD is at DC?

The PSRR is 75 dB when AVDD is at DC.

What is the quiescent current in High-resolution mode for iavdd?

The quiescent current is 1.8 mA.