SBAS528C June   2013  – January 2018 DAC7760 , DAC8760

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics
    6. 7.6  Electrical Characteristics: AC
    7. 7.7  Timing Requirements: Write Mode
    8. 7.8  Timing Requirements: Readback Mode
    9. 7.9  Timing Requirements: Daisy-Chain Mode
    10. 7.10 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  DAC Architecture
      2. 8.3.2  Voltage Output Stage
      3. 8.3.3  Current Output Stage
      4. 8.3.4  Internal Reference
      5. 8.3.5  Digital Power Supply
      6. 8.3.6  DAC Clear
      7. 8.3.7  Power-Supply Sequence
      8. 8.3.8  Power-On Reset
      9. 8.3.9  Alarm Detection
      10. 8.3.10 Watchdog Timer
        1. 8.3.10.1 The DACx760 Shares the SPI Bus With Other Devices (Non-DACx760)
      11. 8.3.11 Frame Error Checking
        1. 8.3.11.1 The DACx760 Shares the SPI Bus With Other Devices (Non-DACx760)
      12. 8.3.12 User Calibration
      13. 8.3.13 Programmable Slew Rate
    4. 8.4 Device Functional Modes
      1. 8.4.1 Setting Voltage and Current Output Ranges
      2. 8.4.2 Boost Configuration for IOUT
      3. 8.4.3 Filtering the Current Output (only on the VQFN package)
      4. 8.4.4 HART Interface
        1. 8.4.4.1 For 4-mA to 20-mA Mode
        2. 8.4.4.2 For All Current Output Modes
    5. 8.5 Programming
      1. 8.5.1 Serial Peripheral Interface (SPI)
        1. 8.5.1.1 SPI Shift Register
        2. 8.5.1.2 Write Operation
        3. 8.5.1.3 Read Operation
        4. 8.5.1.4 Stand-Alone Operation
        5. 8.5.1.5 Daisy-Chain Operation
    6. 8.6 Register Maps
      1. 8.6.1 DACx760 Commands and Register Map
        1. 8.6.1.1 DACx760 Register Descriptions
          1. 8.6.1.1.1 Control Register
          2. 8.6.1.1.2 Configuration Register
          3. 8.6.1.1.3 DAC Registers
          4. 8.6.1.1.4 Reset Register
          5. 8.6.1.1.5 Status Register
  9. Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Controlling the VOUT and IOUT Pins
        1. 9.1.1.1 VOUT and IOUT Pins are Independent Outputs, Never Simultaneously Enabled
        2. 9.1.1.2 VOUT and IOUT Pins are Independent Outputs, Simultaneously Enabled
        3. 9.1.1.3 VOUT and IOUT Pins are Tied Together, Never Simultaneously Enabled
      2. 9.1.2 Implementing HART in All Current Output Modes
        1. 9.1.2.1 Using CAP2 Pin on VQFN Package
        2. 9.1.2.2 Using the ISET-R Pin
      3. 9.1.3 Short-Circuit Current Limiting
    2. 9.2 Typical Application
      1. 9.2.1 Voltage and Current Output Driver for Factory Automation and Control, EMC and EMI Protected
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resource
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Features

  • Current Output: 4 mA to 20 mA;
    0 mA to 20 mA; 0 mA to 24 mA
  • Voltage Output:
    • 0 V to 5 V; 0 V to 10 V; ±5 V; ±10 V
    • 0 V to 5.5 V; 0 V to 11 V; ±5.5 V; ±11 V
      (10% Over Range)
  • ±0.1% FSR Total Unadjusted Error (TUE) Maximum
  • DNL: ±1 LSB Maximum
  • Simultaneous Voltage and Current Output
  • Internal 5-V Reference (10 ppm/°C, Maximum)
  • Internal 4.6-V Power-Supply Output
  • Reliability Features:
    • CRC Check and Watchdog Timer
    • Thermal Alarm
    • Open Alarm, Short Current Limit
  • Wide Temperature Range: –40°C to 125°C
  • 6-mm × 6-mm 40-Pin VQFN and 24-Pin HTSSOP Packages

Applications

  • 4-mA to 20-mA Current Loops
  • Analog Output Modules
  • Building Automation
  • Environment Monitoring
  • Programmable Logic Controllers (PLCs)
  • Field Sensors and Process Transmitters

Description

The DAC7760 and DAC8760 are low-cost, precision, fully-integrated, 12-bit and 16-bit digital-to-analog converters (DACs) designed to meet the requirements of industrial process-control applications. These devices can be programmed as a current output with a range of 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA; or as a voltage output with a range of 0 V to 5 V, 0 V to 10 V, ±5 V, or
±10 V with a 10% overrange (0 V to 5.5 V, 0 V to
11 V, ±5.5 V, or ±11 V). Both current and voltage outputs can be simultaneously enabled while being controlled by a single data register.

These devices include a power-on-reset function to ensure powering up in a known state (both IOUT and VOUT are disabled and in a Hi-Z state). The CLR and CLR-SEL pins set the voltage outputs to zero-scale or midscale, and the current output to the low end of the range, if the output is enabled. Zero and gain registers can be programmed to digitally calibrate the device in the end system. The output slew rate is also programmable by register. These devices can superimpose an external HART® signal on the current output and can operate with either a single 10-V to 36-V supply, or dual supplies of up to ±18 V. All versions are available in both 6-mm ×
6-mm 40-pin VQFN and 24-pin HTSSOP packages.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
DACx760 HTSSOP (24) 7.80 mm × 4.40 mm
VQFN (40) 6.00 mm × 6.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Block Diagram

DAC7760 DAC8760 fbd_bas528.gif