ADS131M04
SBAS890C – MARCH 2019 – REVISEDAJADNSU1A3R1YM200241
SBAS890C – MARCH 2019 – REVISED JANUARY 2021
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ADS131M04 4-Channel, Simultaneously-Sampling, 24-Bit, Delta-Sigma ADC
1 Features
3 Description
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•
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4 simultaneously sampling differential inputs
Programmable data rate up to 32 kSPS
Programmable gain up to 128
The ADS131M04 is a four-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:
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•
– 330-kΩ input impedance for gains of
1, 2, and 4
– 1-MΩ input impedance for gains of
8, 16, 32, and 64
Programmable channel-to-channel phase delay
calibration:
– 244-ns resolution, 8.192-MHz fCLKIN
Current-detect mode allows for extremely low
power tamper detection
Fast startup: first data within 0.5 ms of supply
ramp
Integrated negative charge pump allows input
signals below ground
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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A low-drift, 1.2-V reference is integrated into the
device reducing printed circuit board (PCB) area.
Cyclic redundancy check (CRC) options can be
individually enabled on the data input, data output,
and register map to ensure communication integrity.
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•
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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: 3.3 mW at 3-V AVDD
and DVDD
The complete analog front-end (AFE) is offered in a
20-pin TSSOP or leadless 20-pin WQFN package and
is specified over the industrial temperature range of
–40°C to +125°C.
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Device Information (1)
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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Packages: 20-pin TSSOP or 20-pin WQFN
Operating temperature range: –40°C to +125°C
ADS131M04
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
2 Applications
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•
•
•
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Electricity meters: commercial and residential
Circuit breakers
Protection relays
Power quality meters
Battery test equipment
AVDD
DVDD
1.2-V
Reference
AIN0P
AIN0N
+
Phase Shift
Digital Filters
&
Gain
& Offset
Calibration
DS ADC
DS ADC
DS ADC
DS ADC
œ
SYNC / RESET
AIN1P
AIN1N
+
Phase Shift
Digital Filters
&
Gain & Offset
Calibration
CS
Battery management systems
œ
SCLK
Control &
Serial Interface
DIN
DOUT
DRDY
AIN2P
AIN2N
+
Phase Shift
Digital Filters
&
Gain & Offset
Calibration
œ
Clock
Generation
AIN3P
AIN3N
+
CLKIN
Phase Shift
Digital Filters
&
Gain &
Calibration
Offset
œ
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: ADS131M04
Copyright © 2021 Texas Instruments Incorporated
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