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DAC161S997 16-Bit SPI-Programmable DAC for 4-20 mA Loops
SNAS621A
JUNE 2013 – December 2014
DAC161S997
PRODUCTION DATA.
CONTENTS
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DAC161S997 16-Bit SPI-Programmable DAC for 4-20 mA Loops
1
Features
2
Applications
3
Description
4
Simplified Schematic
5
Revision History
6
Pin Configuration and 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
7.7
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Error Detection And Reporting
8.3.1.1
Loop Error
8.3.1.2
SPI Timeout Error (Channel Error)
8.3.1.3
Frame Error
8.3.1.4
Alarm Current
8.4
Device Functional Modes
8.4.1
Serial Interface
8.4.1.1
SPI Write
8.4.1.2
SPI Read
8.4.1.3
Optional Protected SPI Writes
8.4.1.3.1
SPI Write Error Correction
8.5
Register Maps
9
Application and Implementation
9.1
Application Information
9.1.1
16-bit Dac And Loop Drive
9.1.1.1
DC Characteristics
9.1.1.2
DC Input-Output Transfer Function
9.1.1.3
Loop Interface
9.1.1.4
Loop Compliance
9.1.1.5
AC Characteristics
9.1.1.5.1
Step Response
9.1.1.5.2
Output Impedance
9.1.1.5.3
PSRR
9.1.1.5.4
Stability
9.1.1.5.5
Noise and Ripple
9.1.1.5.6
Digital Feedthrough
9.1.1.5.7
HART Signal Injection
9.1.1.5.8
RC Filter Limitation
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Reasons for Choosing a 3.9-V Zener Diode
9.2.2.2
Loop Compliance Voltage
9.2.2.3
Selection of External BJT
9.2.3
Application Curve
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Trademarks
12.2
Electrostatic Discharge Caution
12.3
Glossary
13
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RGH|16
MPQF182B
Thermal pad, mechanical data (Package|Pins)
RGH|16
QFND440A
Orderable Information
snas621a_oa
snas621a_pm
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