ADS131M02
ADS131M02
www.ti.com
SBAS853A – JANUARY 2020 – REVISED APRIL 2021
SBAS853A – JANUARY 2020 – REVISED APRIL 2021
ADS131M02 2-Channel, Simultaneously-Sampling, 24-Bit, Delta-Sigma ADC
1 Features
3 Description
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2 simultaneously sampling differential inputs
Programmable data rate up to 64 kSPS
Programmable gain up to 128
The ADS131M02 is a two-channel, simultaneously-
sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital
converter (ADC) that offers wide dynamic range, low
power, and energy-measurement-specific features,
making the device an excellent fit for energy metering,
power metrology, and circuit breaker applications. The
ADC inputs can be directly interfaced to a resistor-
divider network or a power transformer to measure
voltage or to a current transformer, shunt, or a
Rogowski coil to measure current.
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:
– Input impedance of 330 kΩ for gains of
1, 2, and 4
– Input impedance of ≥1 MΩ for gains of
8, 16, 32, 64, and 128
Programmable channel-to-channel phase delay
calibration:
– 244-ns resolution, 8.192-MHz fCLKIN
Current-detect mode allows for extremely low
power tamper detection
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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.
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Integrated negative charge pump allows input
signals below ground
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.
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Crosstalk between channels: –120 dB
Low-drift internal voltage reference
Cyclic redundancy check (CRC) on
communications and register map
2.7-V to 3.6-V analog and digital supplies
Low power consumption: 2.3 mW at 3-V AVDD
and DVDD
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The complete analog front-end (AFE) is offered
in a 20-pin TSSOP package or a leadless 20-pin
WQFN package and is specified over the industrial
temperature range of –40°C to +125°C.
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Packages: 20-pin TSSOP or 20-pin WQFN
Operating temperature range: –40°C to +125°C
Device Information(1)
2 Applications
PART NUMBER
PACKAGE
TSSOP (20)
WQFN (20)
BODY SIZE (NOM)
6.50 mm × 4.40 mm
3.00 mm × 3.00 mm
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Electricity meters: commercial and residential
Circuit breakers
Protection relays
Power quality meters
Battery test equipment
ADS131M02
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Battery management systems
AVDD
DVDD
1.2-V
Reference
SYNC / RESET
AIN0P
AIN0N
+
Phase Shift &
Digital Filter
Gain & Offset
Calibration
DS ADC
CS
œ
SCLK
Control &
Serial Interface
DIN
DOUT
DRDY
AIN1P
AIN1N
+
Phase Shift &
Digital Filter
Gain & Offset
Calibration
DS ADC
œ
Clock
Generation
CLKIN
AGND
DGND
Simplified Block Diagram
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Product Folder Links: ADS131M02
Copyright © 2021 Texas Instruments Incorporated
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