SLASF63 june   2023 DAC539E4W

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics: Threshold DAC
    6. 6.6  Electrical Characteristics: Comparator
    7. 6.7  Electrical Characteristics: General
    8. 6.8  Timing Requirements: I2C Standard Mode
    9. 6.9  Timing Requirements: I2C Fast Mode
    10. 6.10 Timing Requirements: I2C Fast Mode Plus
    11. 6.11 Timing Requirements: SPI Write Operation
    12. 6.12 Timing Requirements: SPI Read and Daisy Chain Operation (FSDO = 0)
    13. 6.13 Timing Requirements: SPI Read and Daisy Chain Operation (FSDO = 1)
    14. 6.14 Timing Diagrams
    15. 6.15 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Smart Digital-to-Analog Converter (DAC) Architecture
      2. 7.3.2 Threshold DAC
        1. 7.3.2.1 Voltage Reference and DAC Transfer Function
          1. 7.3.2.1.1 Power-Supply as Reference
          2. 7.3.2.1.2 Internal Reference
          3. 7.3.2.1.3 External Reference
      3. 7.3.3 Look-Up Table (LUT)
      4. 7.3.4 Programming Interface
      5. 7.3.5 Nonvolatile Memory (NVM)
        1. 7.3.5.1 NVM Cyclic Redundancy Check (CRC)
          1. 7.3.5.1.1 NVM-CRC-FAIL-USER Bit
          2. 7.3.5.1.2 NVM-CRC-FAIL-INT Bit
      6. 7.3.6 Power-On Reset (POR)
      7. 7.3.7 External Reset
      8. 7.3.8 Register-Map Lock
    4. 7.4 Device Functional Modes
      1. 7.4.1 Comparator Mode
        1. 7.4.1.1 Programmable Hysteresis Comparator
      2. 7.4.2 Power-Down Mode
    5. 7.5 Programming
      1. 7.5.1 SPI Programming Mode
      2. 7.5.2 I2C Programming Mode
        1. 7.5.2.1 F/S Mode Protocol
        2. 7.5.2.2 I2C Update Sequence
          1. 7.5.2.2.1 Address Byte
          2. 7.5.2.2.2 Command Byte
        3. 7.5.2.3 I2C Read Sequence
    6. 7.6 Register Maps
      1. 7.6.1  NOP Register (address = 00h) [reset = 0000h]
      2. 7.6.2  DAC-x-MARGIN-HIGH Register (address = 01h, 07h, 0Dh, 13h) [reset = 0000h]
      3. 7.6.3  DAC-x-MARGIN-LOW Register (address = 02h, 08h, 0Eh, 14h) [reset = 0000h]
      4. 7.6.4  DAC-x-VOUT-CMP-CONFIG Register (address = 03h, 09h, 0Fh, 15h) [reset = 0401h]
      5. 7.6.5  DAC-x-CMP-MODE-CONFIG Register (address = 05h, 0Bh, 11h, 17h) [reset = 0000h]
      6. 7.6.6  COMMON-CONFIG Register (address = 1Fh) [reset = 1249h]
      7. 7.6.7  COMMON-TRIGGER Register (address = 20h) [reset = 0000h]
      8. 7.6.8  COMMON-DAC-TRIG Register (address = 21h) [reset = 0000h]
      9. 7.6.9  GENERAL-STATUS Register (address = 22h) [reset = 00h, DEVICE-ID, VERSION-ID]
      10. 7.6.10 CMP-STATUS Register (address = 23h) [reset = 0000h]
      11. 7.6.11 DEVICE-MODE-CONFIG Register (address = 25h) [reset = 8040h]
      12. 7.6.12 INTERFACE-CONFIG Register (address = 26h) [reset = 0000h]
      13. 7.6.13 STATE-MACHINE-CONFIG0 Register (address = 27h) [reset = 0003h]
      14. 7.6.14 SRAM-CONFIG Register (address = 2Bh) [reset = 0000h]
      15. 7.6.15 SRAM-DATA Register (address = 2Ch) [reset = 0000h]
      16. 7.6.16 DAC-x-DATA Register (SRAM address = 21h, 22h, 23h, 24h) [reset = 8000h]
      17. 7.6.17 LUT-x-DATA Register (SRAM address = 25h through 34h) [reset = (see register description)]
      18. 7.6.18 LOOP-WAIT Register (SRAM address = 35h) [reset = 0000h]
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • YBH|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.4.1 Comparator Mode

To enable the comparator for a channel, write 1 to the CMP-x-EN and the CMP-x-OUT-EN bits in the respective DAC-x-VOUT-CMP-CONFIG register. The comparator output can be configured as push-pull or open-drain using the CMP-x-OD-EN bit. To invert the comparator output, write 1 to the CMP-x-INV-EN bit. The AINx pin has a finite impedance. To disable high-impedance on the AINx pin, write 1 to the CMP-x-HIZ-IN-DIS bit. Table 7-4 shows the comparator output at the pin for different bit settings. Table 7-5 shows the full scale analog input settings for the comparator. Any higher input voltage is clipped.

Table 7-4 Comparator Output Configuration
CMP-x-EN CMP-x-OUT-EN CMP-x-OD-EN CMP-x-INV-EN OUTx PIN(1)
0 X X X Comparator not enabled.
1 0 X X Hi-Z output.
1 1 0 0 Push-pull output.
1 1 0 1 Push-pull and inverted output.
1 1 1 0 Open-drain output.
1 1 1 1 Open-drain and inverted output.
(1) When the comparator is enabled, the comparator output value is accessible to the LUT irrespective of the output pin (OUTx) setting.
Table 7-5 Full Scale Analog Input (VFS)
REFERENCE (VREF) GAIN VFS (Hi-Z INPUT MODE) VFS (FINITE IMPEDANCE INPUT MODE)
Power supply 1 × VDD / 3 VDD
External 1 × VREF / 3 VREF
Internal 1.5 × (VREF × GAIN) / 3 VREF × GAIN
2 × (VREF × GAIN) / 3 VREF × GAIN
3 × (VREF × GAIN) / 6 (VREF × GAIN) / 2
4 × (VREF × GAIN) / 6 (VREF × GAIN) / 2

Individual comparator channels can be configured in no-hysteresis, with-hysteresis, or latching-comparator mode using the CMP-x-MODE field in the respective DAC-x-CMP-MODE-CONFIG register.

Note: Only the no-hysteresis mode is supported in the NVM. The hysteresis or latching comparator modes can be operated from the register map only.

Figure 7-4 shows the interface circuit for the comparators. The programmable comparator operation is as shown in Figure 7-5. Individual comparator channels can be configured in no-hysteresis or with-hysteresis mode using the CMP-x-MODE bit in the respective DAC-x-CMP-MODE-CONFIG register, as shown in Table 7-6.

GUID-20230629-SS0I-QVSZ-MPLR-L5NLK7KHFTP5-low.svg Figure 7-4 Comparator Interface
GUID-20230629-SS0I-6WQZ-NGW8-VHDZKTK5TGB6-low.svg Figure 7-5 Programmable Comparator Operation
Table 7-6 Comparator Mode Selection
CMP-x-MODE BIT FIELD COMPARATOR CONFIGURATION
00 Normal comparator mode. No hysteresis operation.
01 Hysteresis comparator mode (not supported in NVM). DAC-x-MARGIN-HIGH and DAC-x-MARGIN-LOW registers set the hysteresis.
10 Invalid setting.
11 Invalid setting.