SBASAM0B
March 2024 – November 2024
ADS127L18
PRODMIX
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Timing Requirements
5.7
Switching Characteristics
5.8
Timing Diagrams
5.9
Typical Characteristics
6
Parameter Measurement Information
6.1
Offset Error Measurement
6.2
Offset Drift Measurement
6.3
Gain Error Measurement
6.4
Gain Drift Measurement
6.5
NMRR Measurement
6.6
CMRR Measurement
6.7
PSRR Measurement
6.8
SNR Measurement
6.9
INL Error Measurement
6.10
THD Measurement
6.11
IMD Measurement
6.12
SFDR Measurement
6.13
Noise Performance
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Analog Inputs (AINP, AINN)
7.3.1.1
Input Range
7.3.2
Reference Voltage (REFP, REFN)
7.3.2.1
Reference Voltage Range
7.3.3
Clock Operation
7.3.3.1
Clock Dividers
7.3.3.2
Internal Oscillator
7.3.3.3
External Clock
7.3.4
Power-On Reset (POR)
7.3.5
VCM Output Voltage
7.3.6
GPIO
7.3.7
Modulator
7.3.8
Digital Filter
7.3.8.1
Wideband Filter
7.3.8.2
Low-Latency Filter (Sinc)
7.3.8.2.1
Sinc4 Filter
7.3.8.2.2
Sinc4 + Sinc1 Cascade Filter
7.3.8.2.3
Sinc3 Filter
7.3.8.2.4
Sinc3 + Sinc1 Filter
7.4
Device Functional Modes
7.4.1
Reset
7.4.1.1
RESET Pin
7.4.1.2
Reset by SPI Register
7.4.1.3
Reset by SPI Input Pattern
7.4.2
Idle and Standby Modes
7.4.3
Power-Down
7.4.4
Speed Modes
7.4.5
Synchronization
7.4.5.1
Synchronized Control Mode
7.4.5.2
Start/Stop Control Mode
7.4.6
Conversion-Start Delay Time
7.4.7
Calibration
7.4.7.1
Offset Calibration Registers
7.4.7.2
Gain Calibration Registers
7.4.7.3
Calibration Procedure
7.4.8
Data Averaging
7.4.9
Diagnostics
7.4.9.1
ERROR Pin and ERR_FLAG Bit
7.4.9.2
SPI CRC
7.4.9.3
Register Map CRC
7.4.9.4
ADC Error
7.4.9.5
SPI Address Range
7.4.9.6
SCLK Counter
7.4.9.7
Clock Counter
7.4.9.8
Frame-Sync CRC
7.4.9.9
Self Test
7.4.10
Frame-Sync Data Port
7.4.10.1
Data Packet
7.4.10.2
Data Format
7.4.10.3
STATUS_DP Header Byte
7.4.10.4
FSYNC Pin
7.4.10.5
DCLK Pin
7.4.10.6
DOUTx Pins
7.4.10.7
DINx Pins
7.4.10.8
Time Division Multiplexing
7.4.10.9
Daisy Chain
7.4.10.10
DOUTx Timing
7.5
Programming
7.5.1
Hardware Programming
7.5.2
SPI Programming
7.5.2.1
Chip Select (CS)
7.5.2.2
Serial Clock (SCLK)
7.5.2.3
Serial Data Input (SDI)
7.5.2.4
Serial Data Output (SDO)
7.5.3
SPI Frame
7.5.4
Commands
7.5.4.1
Write Register Command
7.5.4.2
Read Register Command
7.5.5
SPI Daisy-Chain
8
Register Map
9
Application and Implementation
9.1
Application Information
9.1.1
Input Driver
9.1.2
Antialias Filter
9.1.3
Reference Voltage
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.3
Application Curves
9.3
Power Supply Recommendations
9.3.1
AVDD1 and AVSS
9.3.2
AVDD2
9.3.3
IOVDD
9.3.4
CAPA and CAPD
9.4
Layout
9.4.1
Layout Guidelines
9.4.2
Layout Example
10
Device and Documentation Support
10.1
Documentation Support
10.1.1
Related Documentation
10.2
Receiving Notification of Documentation Updates
10.3
Support Resources
10.4
Trademarks
10.5
Electrostatic Discharge Caution
10.6
Glossary
11
Revision History
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RSH|56
MPQF191C
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sbasam0b_oa
sbasam0b_pm
Data Sheet
ADS127L1x 512kSPS, Quad and Octal, Simultaneous-Sampling, 24-Bit ADCs