SBAS363E
December 2009 – August 2016
ADS8331
,
ADS8332
PRODUCTION DATA.
1
Features
2
Applications
3
Description
4
Revision History
5
Companion Products
6
Device Comparison
7
Pin Configuration and Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
ESD Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Electrical Characteristics: VA = 2.7 V
8.6
Electrical Characteristics: VA = 5 V
8.7
Timing Requirements: VA = 2.7 V
8.8
Timing Characteristics: VA = 5 V
8.9
Typical Characteristics: DC Performance
8.10
Typical Characteristics: AC Performance
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Signal Conditioning
9.3.2
Analog Input
9.3.2.1
Driver Amplifier Choice
9.3.2.2
Bipolar to Unipolar Driver
9.4
Device Functional Modes
9.4.1
Reference
9.4.2
Converter Operation
9.4.2.1
Manual Channel Select Mode
9.4.2.2
Auto Channel Select Mode
9.4.2.3
Start of a Conversion
9.4.2.4
Status Output Pin (EOC/INT)
9.4.2.5
Power-Down Modes and Acquisition Time
9.5
Programming
9.5.1
Digital Interface
9.5.1.1
Internal Register
9.5.2
Writing to the Converter
9.5.2.1
Configuring the Converter and Default Mode
9.5.3
Reading the Configuration Register
9.5.4
Reading the Conversion Result
9.5.4.1
TAG Mode
9.5.4.2
Daisy-Chain Mode
9.5.5
Reset Function
10
Application and Implementation
10.1
Application Information
10.1.1
ADC Reference Driver
10.1.1.1
Reference Driver Circuit for VREF = 4.096 V
10.1.1.2
Reference Driver Circuit for VREF=2.5 V, VA=2.7 V
10.1.2
ADC Input Driver
10.1.2.1
Input Amplifier Selection
10.1.2.2
ADC Input RC Filter
10.2
Typical Applications
10.2.1
DAQ Circuit for Low Noise and Distortion Performance for a 10-kHz Input Signal at 500 kSPS
10.2.1.1
Design Requirements
10.2.1.2
Detailed Design Procedure
10.2.1.3
Application Curve
10.2.2
Ultra Low-Power DAQ Circuit for DC Input Signals at 10 kSPS per Channel
10.2.2.1
Design Requirements
10.2.2.2
Detailed Design Procedure
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
Device and Documentation Support
13.1
Documentation Support
13.1.1
Related Documentation
13.2
Related Links
13.3
Receiving Notification of Documentation Updates
13.4
Community Resources
13.5
Trademarks
13.6
Electrostatic Discharge Caution
13.7
Glossary
14
Mechanical, Packaging, and Orderable Information
6 Device Comparison
RESOLUTION
CHANNELS
f
S
≤ 250 kSPS
250 kSPS < f
S
≤ 500 kSPS
500 kSPS < f
S
≤ 1 MSPS
18 bits
8
—
ADS8698
—
4
—
ADS8694
—
16 bits
8
ADS8344
ADS8688
—
ADS8345
ADS8688A
4
ADS8341
ADS8684
—
ADS8342
ADS8684A
ADS8343
14 bits
8
TLC3548
ADS8678
—
TLC3578
4
TLC3544
ADS8674
ADS7263
TLC3574