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ADS131M04 Datasheet Preview

ADS131M04 Datasheet

24-Bit Delta-Sigma ADC

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ADS131M04
SBAS890A – MARCH 2019 – REVISED JULY 2019
ADS131M04 4-Channel, Simultaneously-Sampling, 24-Bit, Delta-Sigma ADC
1 Features
1 4 simultaneously sampling differential inputs
• Programmable data rate up to 32 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:
– 300-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 super low power
tamper detection
• Fast startup: 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
• 2.7-V to 3.6-V analog and digital supplies
• Low power consumption: 3.3 mW at 3-V AVDD
and DVDD
• Package: 20-pin TSSOP or 20-pin WQFN
• Operating temperature range: –40°C to +125°C
2 Applications
• Electricity meters: commercial and residential
• Circuit breakers
• Battery test equipment
• Battery management systems
3 Description
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 excellent 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 or a
Rogowski coil to measure current.
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.
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.
The complete analog front-end (AFE) solution 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADS131M04
TSSOP (20)
WQFN (20)
6.50 mm × 4.40 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Block Diagram
AVDD
DVDD
1.2-V
Reference
AIN0P
AIN0N
+
±
AIN1P
AIN1N
+
±
AIN2P
AIN2N
+
±
'6 ADC
Phase Shift &
Digital Filters
Gain & Offset
Calibration
'6 ADC
Phase Shift &
Digital Filters
Gain & Offset
Calibration
'6 ADC
Phase Shift &
Digital Filters
Gain & Offset
Calibration
Control &
Serial Interface
SYNC / RESET
CS
SCLK
DIN
DOUT
DRDY
AIN3P
AIN3N
+
±
'6 ADC
Phase Shift &
Digital Filters
Gain & Offset
Calibration
Clock
Generation
CLKIN
AGND
DGND
1
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.




etcTI

ADS131M04 Datasheet Preview

ADS131M04 Datasheet

24-Bit Delta-Sigma ADC

No Preview Available !

ADS131M04
SBAS890A – MARCH 2019 – REVISED JULY 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 6
6.6 Timing Requirements ................................................ 7
6.7 Switching Characteristics .......................................... 8
6.8 Typical Characteristics ............................................ 10
7 Parameter Measurement Information ................ 14
7.1 Noise Measurements .............................................. 14
8 Detailed Description ............................................ 14
8.1 Overview ................................................................. 14
8.2 Functional Block Diagram ....................................... 15
8.3 Feature Description................................................. 16
8.4 Device Functional Modes........................................ 29
8.5 Programming........................................................... 33
8.6 ADS131M04 Registers............................................ 43
9 Application and Implementation ........................ 79
9.1 Application Information............................................ 79
9.2 Typical Application .................................................. 87
10 Power Supply Recommendations ................... 101
10.1 CAP Pin............................................................... 101
10.2 Power-Supply Sequencing.................................. 101
10.3 Power-Supply Decoupling................................... 101
11 Layout................................................................. 101
11.1 Layout Guidelines ............................................... 101
11.2 Layout Example .................................................. 101
12 Device and Documentation Support ............... 103
12.1 Receiving Notification of Documentation
Updates.................................................................. 103
12.2 Community Resources........................................ 103
12.3 Trademarks ......................................................... 103
12.4 Electrostatic Discharge Caution .......................... 103
12.5 Glossary .............................................................. 103
13 Mechanical, Packaging, and Orderable
Information ......................................................... 103
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (March 2019) to Revision A
Page
• Changed document status from APL to Production Data ..................................................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: ADS131M04
Copyright © 2019, Texas Instruments Incorporated


Part Number ADS131M04
Description 24-Bit Delta-Sigma ADC
Maker etcTI
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