SBASAA3
September 2021
ADS131B02-Q1
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
Internal Test Signals
8.3.6
Clocking
8.3.6.1
External Clock Using CLKIN Pin
8.3.6.2
Internal Oscillator
8.3.7
ΔΣ Modulator
8.3.8
Digital Filter
8.3.8.1
Digital Filter Implementation
8.3.8.1.1
Fast-Settling Filter
8.3.8.1.2
SINC3 and SINC3 + SINC1 Filter
8.3.8.2
Digital Filter Characteristic
8.3.9
Calibration Registers
8.3.10
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 Start-Up 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
Synchronization
8.5
Programming
8.5.1
Serial 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
SPI Communication Frames
8.5.1.7
SPI Communication Words
8.5.1.8
Short SPI Frames
8.5.1.9
Communication Cyclic Redundancy Check (CRC)
8.5.1.10
SPI Timeout
8.5.2
ADC Conversion Data Format
8.5.3
Commands
8.5.3.1
NULL (0000 0000 0000 0000)
8.5.3.2
RESET (0000 0000 0001 0001)
8.5.3.3
STANDBY (0000 0000 0010 0010)
8.5.3.4
WAKEUP (0000 0000 0011 0011)
8.5.3.5
LOCK (0000 0101 0101 0101)
8.5.3.6
UNLOCK (0000 0110 0110 0110)
8.5.3.7
RREG (101a aaaa annn nnnn)
8.5.3.7.1
Reading a Single Register
8.5.3.7.2
Reading Multiple Registers
8.5.3.8
WREG (011a aaaa annn nnnn)
8.5.4
Collecting Data for the First Time or After a Pause in Data Collection
8.6
Register Map
9
Application and Implementation
9.1
Application Information
9.1.1
Troubleshooting
9.1.2
Unused Inputs and Outputs
9.1.3
Antialias Filter
9.1.4
Minimum Interface Connections
9.1.5
Multiple Device Configuration
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Current Shunt Measurement
9.2.2.2
Battery Pack Voltage Measurement
9.2.3
Application Curves
10
Power Supply Recommendations
10.1
CAP Pin Capacitor Requirement
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
Receiving Notification of Documentation Updates
12.2
Support Resources
12.3
Trademarks
12.4
Electrostatic Discharge Caution
12.5
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
PW|20
MPDS362A
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sbasaa3_oa
sbasaa3_pm
1
Features
AEC-Q100 qualified for automotive applications:
Temperature grade 1: –40°C to +125°C, T
A
Functional Safety-Capable
Documentation available to aid functional safety system design
2
simultaneous-sampling, differential input ADCs
Programmable data rate: Up to 32 kSPS
Programmable gain: Up to 128
Noise performance:
0.82 μV
RMS
at 1 kSPS, gain = 8
Global-chop mode to remove offset drift over temperature and time
High-impedance analog inputs for direct sensor connection
Integrated negative charge pump allows input signal measurements below ground
Crosstalk between channels: –120 dB
Low-drift internal reference: 1.2 V
Precision internal oscillator
CRC on communications and register map
Analog and digital supplies: 2.7 V to 3.6 V
Low power consumption: 3 mW at 3.3-V AVDD and DVDD