JAJSQO0 june   2023 DAC539E4W

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  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 ドキュメントの更新通知を受け取る方法
    2. 9.2 サポート・リソース
    3. 9.3 Trademarks
    4. 9.4 静電気放電に関する注意事項
    5. 9.5 用語集
  11. 10Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

7.3.3 Look-Up Table (LUT)

The DAC539E4W provides a user-programmable look-up table that maps the comparator inputs to the GPOs. This LUT can be stored in the NVM for standalone operation. Table 8-36 and Table 7-2 show the user-programmable LUT with different settings of the CMP-x-INV-EN bit in the DAC-x-VOUT-CMP-CONFIG register. Table 7-3 shows the pin mapping between the programming and standalone modes.

Table 7-1 Comparator Input to GPO Map (CMP-x-INV-EN = 0, default)
COMPARATOR INPUTS USER-PROGRAMMABLE OUTPUTS
(DEFAULT VALUES)		 SRAM LOCATION NAME
AIN3 AIN2 AIN1 AIN0 GPO3 GPO2 GPO1 GPO0
0 0 0 0 1 1 1 1 0x25[3:0] LUT-0-DATA
0 0 0 1 1 1 1 0 0x26[3:0] LUT-1-DATA
0 0 1 0 1 1 0 1 0x27[3:0] LUT-2-DATA
0 0 1 1 1 1 0 0 0x28[3:0] LUT-3-DATA
0 1 0 0 1 0 1 1 0x29[3:0] LUT-4-DATA
0 1 0 1 1 0 1 0 0x2A[3:0] LUT-5-DATA
0 1 1 0 1 0 0 1 0x2B[3:0] LUT-6-DATA
0 1 1 1 1 0 0 0 0x2C[3:0] LUT-7-DATA
1 0 0 0 0 1 1 1 0x2D[3:0] LUT-8-DATA
1 0 0 1 0 1 1 0 0x2E[3:0] LUT-9-DATA
1 0 1 0 0 1 0 1 0x2F[3:0] LUT-10-DATA
1 0 1 1 0 1 0 0 0x30[3:0] LUT-11-DATA
1 1 0 0 0 0 1 1 0x31[3:0] LUT-12-DATA
1 1 0 1 0 0 1 0 0x32[3:0] LUT-13-DATA
1 1 1 0 0 0 0 1 0x33[3:0] LUT-14-DATA
1 1 1 1 0 0 0 0 0x34[3:0] LUT-15-DATA
Table 7-2 Comparator Input to GPO Map (CMP-x-INV-EN = 1)
COMPARATOR INPUTS USER-PROGRAMMABLE OUTPUTS
(DEFAULT VALUES)		 SRAM LOCATION NAME
AIN3 AIN2 AIN1 AIN0 GPO3 GPO2 GPO1 GPO0
0 0 0 0 0 0 0 0 0x25[3:0] LUT-0-DATA
0 0 0 1 0 0 0 1 0x26[3:0] LUT-1-DATA
0 0 1 0 0 0 1 0 0x27[3:0] LUT-2-DATA
0 0 1 1 0 0 1 1 0x28[3:0] LUT-3-DATA
0 1 0 0 0 1 0 0 0x29[3:0] LUT-4-DATA
0 1 0 1 0 1 0 1 0x2A[3:0] LUT-5-DATA
0 1 1 0 0 1 1 0 0x2B[3:0] LUT-6-DATA
0 1 1 1 0 1 1 1 0x2C[3:0] LUT-7-DATA
1 0 0 0 1 0 0 0 0x2D[3:0] LUT-8-DATA
1 0 0 1 1 0 0 1 0x2E[3:0] LUT-9-DATA
1 0 1 0 1 0 1 0 0x2F[3:0] LUT-10-DATA
1 0 1 1 1 0 1 1 0x30[3:0] LUT-11-DATA
1 1 0 0 1 1 0 0 0x31[3:0] LUT-12-DATA
1 1 0 1 1 1 0 1 0x32[3:0] LUT-13-DATA
1 1 1 0 1 1 1 0 0x33[3:0] LUT-14-DATA
1 1 1 1 1 1 1 1 0x34[3:0] LUT-15-DATA
Table 7-3 GPO Pin Mapping
STANDALONE MODE
(MODE PIN IS HIGH)		 PROGRAMMING MODE
(MODE PIN IS LOW)		 PIN NUMBER
GPO0 SDA/SCLK 8
GPO1 A0/SDI 7
GPO2 SCL/SYNC 6
GPO3 NC/SDO 5

The DAC539E4W provides a programmable delay between the comparator outputs and the GPOs to allow the analog inputs to settle the transitions. This delay is specified using the LOOP-REFRESH field in the LOOP-WAIT register. Equation 4 calculates the total delay in seconds using the decimal value of the LOOP-REFRESH field.

Equation 4. D E L A Y _ T I M E = 2 L O O P _ R E F R E S H + 1 25.6 × 10 6