SBASA74
January 2023
ADS9218
ADVANCE INFORMATION
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
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: ADS9218
6.10
Typical Characteristics: ADS9217
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
Data Interface
7.3.5.1
Data Frame Width
7.3.5.2
Test Patterns for Data Interface
7.3.5.2.1
User-Defined Test Pattern
7.3.5.2.2
User-Defined Alternating Test Pattern
7.3.5.2.3
Ramp Test Pattern
7.3.6
ADC Sampling Clock Input
7.4
Device Functional Modes
7.4.1
Normal Operation
7.4.2
Power-Down Options
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
7.6
Register Map
7.6.1
Register Bank 0
7.6.2
Register Bank 1
7.6.3
Register Bank 2
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Data Acquisition (DAQ) Circuit for ≤20-kHz Input Signal Bandwidth
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.3
Application Curves
8.2.2
Data Acquisition (DAQ) Circuit for ≤100-kHz Input Signal Bandwidth
8.2.2.1
Design Requirements
8.2.2.2
Application Curves
8.2.3
Data Acquisition (DAQ) Circuit for ≤1-MHz Input Signal Bandwidth
8.2.3.1
Design Requirements
8.2.3.2
Application Curves
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Documentation Support
9.1.1
Related Documentation
9.2
Receiving Notification of Documentation Updates
9.3
Support Resources
9.4
Trademarks
9.5
Electrostatic Discharge Caution
9.6
Glossary
10
Mechanical, Packaging, and Orderable Information
10.1
Mechanical Data
Package Options
Mechanical Data (Package|Pins)
RHA|40
MPQF135D
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sbasa74_oa
1
Features
High-speed, 10-MSPS/ch sampling rate
ADS9218
:
10 MSPS/ch
ADS9217
:
5 MSPS/ch
2-channel, simultaneous sampling
Feature integration:
Integrated ADC driver
Integrated precision reference
Common-mode voltage output buffer
High-performance
18-bit
no missing codes
INL:
±1 LSB
, DNL:
±0.75 LSB
SNR:
95 dB
, THD:
–115 dB
at f
IN
= 2 kHz
Wide input bandwidth:
ADS9218
: 90 MHz (–3 dB)
ADS9217
: 45 MHz (–3 dB)
Low-power
180 mW/ch
at
10 MSPS/ch
Serial LVDS interface:
SDR and DDR output modes
Synchronous clock and data output
Extended operating range: –40°C to +125°C
6-mm × 6-mm
VQFN
package