SBAS889A
January 2020 – April 2021
ADS131M03
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Timing Requirements
6.7
Switching Characteristics
6.8
Timing Diagrams
6.9
Typical Characteristics
7
Parameter Measurement Information
7.1
Noise Measurements
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Input ESD Protection Circuitry
8.3.2
Input Multiplexer
8.3.3
Programmable Gain Amplifier (PGA)
8.3.4
Voltage Reference
8.3.5
Clocking and Power Modes
8.3.6
ΔΣ Modulator
8.3.7
Digital Filter
8.3.7.1
Digital Filter Implementation
8.3.7.1.1
Fast-Settling Filter
8.3.7.1.2
SINC3 and SINC3 + SINC1 Filter
8.3.7.2
Digital Filter Characteristic
8.3.8
DC Block Filter
8.3.9
Internal Test Signals
8.3.10
Channel Phase Calibration
8.3.11
Calibration Registers
8.3.12
Communication Cyclic Redundancy Check (CRC)
8.3.13
Register Map CRC
8.4
Device Functional Modes
8.4.1
Power-Up and Reset
8.4.1.1
Power-On Reset
8.4.1.2
SYNC/RESET Pin
8.4.1.3
RESET Command
8.4.2
Fast Startup Behavior
8.4.3
Conversion Modes
8.4.3.1
Continuous-Conversion Mode
8.4.3.2
Global-Chop Mode
8.4.4
Power Modes
8.4.5
Standby Mode
8.4.6
Current-Detect Mode
8.5
Programming
8.5.1
Interface
8.5.1.1
Chip Select (CS)
8.5.1.2
Serial Data Clock (SCLK)
8.5.1.3
Serial Data Input (DIN)
8.5.1.4
Serial Data Output (DOUT)
8.5.1.5
Data Ready (DRDY)
8.5.1.6
Conversion Synchronization or System Reset (SYNC/RESET)
8.5.1.7
SPI Communication Frames
8.5.1.8
SPI Communication Words
8.5.1.9
ADC Conversion Data
8.5.1.9.1
Collecting Data for the First Time or After a Pause in Data Collection
8.5.1.10
Commands
8.5.1.10.1
NULL (0000 0000 0000 0000)
8.5.1.10.2
RESET (0000 0000 0001 0001)
8.5.1.10.3
STANDBY (0000 0000 0010 0010)
8.5.1.10.4
WAKEUP (0000 0000 0011 0011)
8.5.1.10.5
LOCK (0000 0101 0101 0101)
8.5.1.10.6
UNLOCK (0000 0110 0110 0110)
8.5.1.10.7
RREG (101a aaaa annn nnnn)
8.5.1.10.7.1
Reading a Single Register
8.5.1.10.7.2
Reading Multiple Registers
8.5.1.10.8
WREG (011a aaaa annn nnnn)
8.5.1.11
Short SPI Frames
8.5.2
Synchronization
8.6
ADS131M03 Registers
9
Application and Implementation
9.1
Application Information
9.1.1
Unused Inputs and Outputs
9.1.2
Antialiasing
9.1.3
Minimum Interface Connections
9.1.4
Multiple Device Configuration
9.1.5
Power Metrology Applications
9.1.6
Code Example
9.1.7
Troubleshooting
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Voltage Measurement Front-End
9.2.2.2
Current Measurement Front-End
9.2.2.3
ADC Setup
9.2.2.4
Calibration
9.2.2.5
Formulae
9.2.3
Application Curves
10
Power Supply Recommendations
10.1
CAP Pin Behavior
10.2
Power-Supply Sequencing
10.3
Power-Supply Decoupling
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Documentation Support
12.1.1
Related Documentation
12.2
Receiving Notification of Documentation Updates
12.3
Support Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
PW|20
MPDS362A
RUK|20
MPQF220D
Thermal pad, mechanical data (Package|Pins)
RUK|20
QFND191D
Orderable Information
sbas889a_oa
sbas889a_pm
12.1
Documentation Support