JAJSI70C May   2008  – November 2019 DAC9881

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      ブロック図
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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: AVDD = 5 V
    6. 7.6  Electrical Characteristics: AVDD = 2.7 V
    7. 7.7  Timing Requirements—Standalone Operation Without SDO
    8. 7.8  Timing Requirements—Standalone Operation With SDO and Daisy-Chain Mode
    9. 7.9  Typical Characteristics: AVDD = 5 V
    10. 7.10 Typical Characteristics: AVDD = 2.7 V
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Analog Output
      2. 8.3.2  Reference Inputs
      3. 8.3.3  Output Range
      4. 8.3.4  Input Data Format
      5. 8.3.5  Hardware Reset
      6. 8.3.6  Power-On Reset
        1. 8.3.6.1 Program Reset Value
      7. 8.3.7  Power Down
      8. 8.3.8  Double-Buffered Interface
        1. 8.3.8.1 Load DAC Pin (LDAC)
          1. 8.3.8.1.1 Synchronous Mode
          2. 8.3.8.1.2 Asynchronous Mode
      9. 8.3.9  1.8-V to 5-V Logic Interface
      10. 8.3.10 Power-Supply Sequence
    4. 8.4 Device Functional Modes
      1. 8.4.1 Serial Interface
        1. 8.4.1.1 Input Shift Register
          1. 8.4.1.1.1 Stand-Alone Mode
          2. 8.4.1.1.2 Daisy-Chain Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Bipolar Operation Using the DAC9881
    2. 9.2 Typical Application
      1. 9.2.1 DAC9881 Sample-and-Hold Circuit
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
    3. 9.3 System Example
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 ドキュメントのサポート
      1. 12.1.1 関連資料
    2. 12.2 ドキュメントの更新通知を受け取る方法
    3. 12.3 サポート・リソース
    4. 12.4 商標
    5. 12.5 静電気放電に関する注意事項
    6. 12.6 Glossary
  13. 13メカニカル、パッケージ、および注文情報

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

9.1.1 Bipolar Operation Using the DAC9881

The DAC9881 is designed for single-supply operation; however, a bipolar output is also possible using the circuit shown in Figure 70. This circuit gives a bipolar output voltage of VOUT. When GAIN = 1, VOUT can be calculated using Equation 2:

DAC9881 Bipolar_Output_Range.gif
Some pins are omitted for clarity.
Figure 70. Bipolar Output Range
Equation 2. DAC9881 EQ1_VOUT_CODE.gif

where

  • VOUT(CODE) = output voltage vs code
  • CODE = 0 to 262143. This is the digital code loaded to the DAC
  • VREF = reference voltage applied to the DAC9881

As an example, a ±8-V output span can be achieved by using values of 5 V, 6.25 kΩ, 16.67 kΩ, and 10 kΩ for Vref, R1, R2, and R3 respectively.