SBAS569B
May 2013 – February 2019
ADS8860
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
No Separate LDO Required for the ADC Supply
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Requirements: 3-Wire Operation
7.7
Timing Requirements: 4-Wire Operation
7.8
Timing Requirements: Daisy-Chain
7.9
Typical Characteristics
8
Parameter Measurement Information
8.1
Equivalent Circuits
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Analog Input
9.3.2
Reference
9.3.3
Clock
9.3.4
ADC Transfer Function
9.4
Device Functional Modes
9.4.1
CS Mode
9.4.1.1
3-Wire CS Mode Without a Busy Indicator
9.4.1.2
3-Wire CS Mode With a Busy Indicator
9.4.1.3
4-Wire CS Mode Without a Busy Indicator
9.4.1.4
4-Wire CS Mode With a Busy Indicator
9.4.2
Daisy-Chain Mode
9.4.2.1
Daisy-Chain Mode Without a Busy Indicator
9.4.2.2
Daisy-Chain Mode With a Busy Indicator
10
Application and Implementation
10.1
Application Information
10.1.1
ADC Reference Driver
10.1.2
ADC Input Driver
10.1.2.1
Input Amplifier Selection
10.1.2.2
Charge-Kickback Filter
10.2
Typical Applications
10.2.1
DAQ Circuit for a 1-µs, Full-Scale Step Response
10.2.1.1
Design Requirements
10.2.1.2
Detailed Design Procedure
10.2.2
DAQ Circuit for Lowest Distortion and Noise Performance at 1 MSPS
10.2.2.1
Design Requirements
10.2.2.2
Detailed Design Procedure
10.2.3
Ultralow-Power DAQ Circuit at 10 kSPS
10.2.3.1
Design Requirements
10.2.3.2
Detailed Design Procedure
11
Power Supply Recommendations
11.1
Power-Supply Decoupling
11.2
Power Saving
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
Receiving Notification of Documentation Updates
13.3
Community Resources
13.4
Trademarks
13.5
Electrostatic Discharge Caution
13.6
Glossary
14
Mechanical, Packaging, and Orderable Information
7.9
Typical Characteristics
at T
A
= 25°C, AVDD = 3 V, DVDD = 3 V, V
REF
= 5 V, and f
SAMPLE
=
1 MSPS
(unless otherwise noted)
Figure 4.
Typical INL (V
REF
= 2.5 V)
Figure 6.
Typical INL (V
REF
= 5 V)
Figure 8.
INL vs Temperature
Figure 10.
INL vs Reference Voltage
Figure 12.
DC Input Histogram (V
REF
= 2.5 V)
Figure 14.
Typical FFT (V
REF
= 2.5 V)
Figure 16.
SNR vs Reference Voltage
Figure 18.
ENOB vs Reference Voltage
Figure 20.
SFDR vs Reference Voltage
Figure 22.
SINAD vs Temperature
Figure 24.
THD vs Temperature
Figure 26.
SNR vs Input Frequency
Figure 28.
ENOB vs Input Frequency
Figure 30.
SFDR vs Input Frequency
Figure 32.
Power Consumption vs Temperature
Figure 34.
Power Consumption vs Throughput
Figure 36.
Offset vs Temperature
Figure 38.
Typical Distribution of Gain Error
Figure 40.
Typical Distribution of Differential Nonlinearity (Minimum and Maximum)
Figure 5.
Typical DNL (V
REF
= 2.5 V)
Figure 7.
Typical DNL (V
REF
= 5 V)
Figure 9.
DNL vs Temperature
Figure 11.
DNL vs Reference Voltage
Figure 13.
DC Input Histogram (V
REF
= 5 V)
Figure 15.
Typical FFT (V
REF
= 5 V)
Figure 17.
SINAD vs Reference Voltage
Figure 19.
THD vs Reference Voltage
Figure 21.
SNR vs Temperature
Figure 23.
ENOB vs Temperature
Figure 25.
SFDR vs Temperature
Figure 27.
SINAD vs Input Frequency
Figure 29.
THD vs Input Frequency
Figure 31.
Supply Current vs Temperature
Figure 33.
Supply Current vs Throughput
Figure 35.
Power-Down Current vs Temperature
Figure 37.
Gain Error vs Temperature
Figure 39.
Typical Distribution of Offset Error
Figure 41.
Typical Distribution of Integral
Nonlinearity (Minimum and Maximum)