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ADS922x Dual, Simultaneous-Sampling, 16-Bit, 20MSPS SAR ADCs With Fully Differential ADC Input Driver
SBASAG2C
December 2023 – March 2025
ADS9227
,
ADS9228
,
ADS9229
PRODUCTION DATA
CONTENTS
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ADS922x Dual, Simultaneous-Sampling, 16-Bit, 20MSPS SAR ADCs With Fully Differential ADC Input Driver
1
1
Features
2
Applications
3
Description
4
Device Comparison Table
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Thermal Information
6.4
Recommended Operating Conditions
6.5
Electrical Characteristics
6.6
Timing Requirements
6.7
Switching Characteristics
6.8
Timing Diagrams
6.9
Typical Characteristics: All Devices
6.10
Typical Characteristics: ADS9229
6.11
Typical Characteristics: ADS9228
6.12
Typical Characteristics: ADS9227
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Analog Inputs
7.3.2
Analog Input Bandwidth
7.3.3
ADC Transfer Function
7.3.4
Reference
7.3.4.1
Internal Reference Voltage
7.3.4.2
External Reference Voltage
7.3.5
Temperature Sensor
7.3.6
Data Averaging
7.3.7
Digital Down Converter
7.3.8
Data Interface
7.3.8.1
Data Frame Width
7.3.8.2
ADC Output Data Randomizer
7.3.8.3
Synchronizing Multiple ADCs
7.3.9
Test Patterns for Data Interface
7.3.9.1
Fixed Pattern
7.3.9.2
Digital Ramp
7.3.9.3
Alternating Test Pattern
7.3.10
ADC Sampling Clock Input
7.4
Device Functional Modes
7.4.1
Reset
7.4.2
Power-Down Options
7.4.3
Normal Operation
7.4.4
Initialization Sequence
7.5
Programming
7.5.1
Register Write
7.5.2
Register Read
7.5.3
Multiple Devices: Daisy-Chain Topology for SPI Configuration
7.5.3.1
Register Write With Daisy-Chain
7.5.3.2
Register Read With Daisy-Chain
8
Register Map
8.1
Register Bank 0
8.2
Register Bank 1
8.3
Register Bank 2
9
Application and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
Data Acquisition (DAQ) Circuit for ≤20kHz Input Signal Bandwidth
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.3
Application Curves
9.2.2
Data Acquisition (DAQ) Circuit for ≤100kHz Input Signal Bandwidth
9.2.2.1
Design Requirements
9.2.2.2
Application Curves
9.2.3
Data Acquisition (DAQ) Circuit for ≤1MHz Input Signal Bandwidth
9.2.3.1
Design Requirements
9.2.3.2
Application Curves
9.3
Power Supply Recommendations
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
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RHA|40
MPQF135D
Thermal pad, mechanical data (Package|Pins)
RHA|40
QFND114P
Orderable Information
sbasag2c_oa
sbasag2c_pm
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ADS922x Dual, Simultaneous-Sampling, 16-Bit, 20MSPS SAR ADCs With Fully Differential ADC Input Driver