JAJSDR5A August   2017  – January 2018 INA828

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      INA828の簡略化された内部回路図
      2.      入力オフセット電圧ドリフトの代表的な分布
  4. 4 改訂履歴
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Setting the Gain
        1. 7.3.1.1 Gain Drift
      2. 7.3.2 EMI Rejection
        1. Table 2. INA828 EMIRR for Frequencies of Interest
      3. 7.3.3 Input Common-Mode Range
      4. 7.3.4 Input Protection
      5. 7.3.5 Operating Voltage
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Reference Terminal
    2. 8.2 Input Bias Current Return Path
    3. 8.3 PCB Assembly Effects on Precision
    4. 8.4 Typical Application
      1. 8.4.1 Design Requirements
      2. 8.4.2 Detailed Design Procedure
      3. 8.4.3 Application Curves
    5. 8.5 Other Application Examples
      1. 8.5.1 Resistance Temperature Detector Interface
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 ドキュメントのサポート
      1. 11.1.1 関連資料
    2. 11.2 ドキュメントの更新通知を受け取る方法
    3. 11.3 コミュニティ・リソース
    4. 11.4 商標
    5. 11.5 静電気放電に関する注意事項
    6. 11.6 Glossary
  12. 12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

7.3.1 Setting the Gain

Figure 52 shows that the gain of the INA828 is set by a single external resistor, RG, connected between the RG pins (pins 1 and 8).

INA828 FBD_01_SBOS792.gifFigure 52. Simplified Diagram of the INA828 With Gain and Output Equations

The value of RG is selected according to:

Equation 1. INA828 ai_eq001_SBOS792.gif

Table 1 lists several commonly-used gains and resistor values. The 50-kΩ term in Equation 1 comes from the sum of the two internal 25-kΩ feedback resistors. These on-chip resistors are laser-trimmed to accurate absolute values. The accuracy and temperature coefficients of these resistors are included in the gain accuracy and drift specifications of the INA828.

Table 1. Commonly-Used Gains and Resistor Values

DESIRED GAIN RG (Ω) NEAREST 1% RG (Ω)
1 NC NC
2 50 k 49.9 k
5 12.5 k 12.4 k
10 5.556 k 5.49 k
20 2.632 k 2.61 k
50 1.02 k 1.02 k
100 505.1 511
200 251.3 249
500 100.2 100
1000 50.05 49.9