SLVSBY7
February 2017
DAC8775
PRODUCTION DATA.
1
Features
2
Applications
3
Description
4
Revision History
5
Device Comparison Table
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: Write and Readback Mode
7.7
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Current Output Stage
8.3.2
Voltage Output Stage
8.3.3
Buck-Boost Converter
8.3.3.1
Buck-Boost Converters Outputs
8.3.3.2
Selecting and Enabling Buck-Boost Converters
8.3.3.3
Configurable Clamp Feature and Current Output Settling Time
8.3.3.3.1
Default Mode - CCLP[1:0] = "00" - Current Output Only
8.3.3.3.2
Fixed Clamp Mode - CCLP[1:0] = "01" - Current and Voltage Output
8.3.3.3.3
Auto Learn Mode - CCLP[1:0] = "10" - Current Output Only
8.3.3.3.4
High Side Clamp (HSCLMP)
8.3.3.4
Buck-Boost Converters and Open Circuit Current Output
8.3.4
Analog Power Supply
8.3.5
Digital Power Supply
8.3.6
Internal Reference
8.3.7
Power-On-Reset
8.3.8
ALARM Pin
8.3.9
Power GOOD Bits
8.3.10
Status Register
8.3.11
Status Mask
8.3.12
Alarm Action
8.3.13
Watchdog Timer
8.3.14
Programmable Slew Rate
8.3.15
HART Interface
8.4
Device Functional Modes
8.4.1
Serial Peripheral Interface (SPI)
8.4.1.1
Stand-Alone Operation
8.4.1.2
Daisy-Chain Operation
8.4.2
SPI Shift Register
8.4.3
Write Operation
8.4.4
Read Operation
8.4.5
Updating the DAC Outputs and LDAC Pin
8.4.5.1
Asynchronous Mode
8.4.5.2
Synchronous Mode
8.4.6
Hardware RESET Pin
8.4.7
Hardware CLR Pin
8.4.8
Frame Error Checking
8.4.9
DAC Data Calibration
8.4.9.1
DAC Data Gain and Offset Calibration Registers
8.5
Register Maps
8.5.1
DAC8775 Commands
8.5.2
Register Maps and Bit Functions
8.5.2.1
No Operation Register (address = 0x00) [reset = 0x0000]
8.5.2.2
Reset Register (address = 0x01) [reset = 0x0000]
8.5.2.3
Reset Config Register (address = 0x02) [reset = 0x0000]
8.5.2.4
Select DAC Register (address = 0x03) [reset = 0x0000]
8.5.2.5
Configuration DAC Register (address = 0x04) [reset = 0x0000]
8.5.2.6
DAC Data Register (address = 0x05) [reset = 0x0000]
8.5.2.7
Select Buck-Boost Converter Register (address = 0x06) [reset = 0x0000]
8.5.2.8
Configuration Buck-Boost Register (address = 0x07) [reset = 0x0000]
8.5.2.9
DAC Channel Calibration Enable Register (address = 0x08) [reset = 0x0000]
8.5.2.10
DAC Channel Gain Calibration Register (address = 0x09) [reset = 0x0000]
8.5.2.11
DAC Channel Offset Calibration Register (address = 0x0A) [reset = 0x0000]
8.5.2.12
Status Register (address = 0x0B) [reset = 0x1000]
8.5.2.13
Status Mask Register (address = 0x0C) [reset = 0x0000]
8.5.2.14
Alarm Action Register (address = 0x0D) [reset = 0x0000]
8.5.2.15
User Alarm Code Register (address = 0x0E) [reset = 0x0000]
8.5.2.16
Reserved Register (address = 0x0F) [reset = N/A]
8.5.2.17
Write Watchdog Timer Register (address = 0x10) [reset = 0x0000]
8.5.2.18
Device ID Register (address = 0x11) [reset = 0x0000]
8.5.2.19
Reserved Register (address 0x12 - 0xFF) [reset = N/A]
9
Application and Implementation
9.1
Application Information
9.1.1
Buck-Boost Converter External Component Selection
9.1.2
Voltage and Current Ouputs on a Shared Terminal
9.1.3
Optimizing Current Output Settling time with Auto learn Mode
9.1.4
Protection for Industrial Transients
9.1.5
Implementing HART with DAC8775
9.2
Typical Application
9.2.1
1W Power Dissipation, Quad Channel, EMC and EMI Protected Analog Output Module with Adaptive Power Management
9.2.2
Design Requirements
9.2.3
Detailed Design Procedure
9.2.4
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Documentation Support
12.1.1
Related Documentation
12.2
Receiving Notification of Documentation Updates
12.3
Community Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RWF|72
MPQF421
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slvsby7_oa
slvsby7_pm
5
Device Comparison Table
PRODUCT
RESOLUTION
DIFFERENTIAL
NONLINEARITY (LSB)
DAC8775
16
±1