JAJS760E August   2000  – February 2024 LMC6081 , LMC6082 , LMC6084

PRODUCTION DATA  

  1.   1
  2. 1特長
  3. 2アプリケーション
  4. 3概要
  5. 4Pin Configuration and Functions
  6. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information LMC6081
    5. 5.5 Thermal Information LMC6082
    6. 5.6 Thermal Information LMC6084
    7. 5.7 Electrical Characteristics
    8. 5.8 Typical Characteristics
  7. 6Application and Implementation
    1. 6.1 Application Information
      1. 6.1.1 Amplifier Topology
      2. 6.1.2 Compensating for Input Capacitance
      3. 6.1.3 Capacitive Load Tolerance
      4. 6.1.4 Latch-Up
    2. 6.2 Typical Applications
      1. 6.2.1 Typical Single-Supply Applications
      2. 6.2.2 Instrumentation Amplifier
    3. 6.3 Layout
      1. 6.3.1 Layout Guidelines
        1. 6.3.1.1 Printed Circuit Board Layout for High-Impedance Work
  8. 7Device and Documentation Support
    1. 7.1 ドキュメントの更新通知を受け取る方法
    2. 7.2 サポート・リソース
    3. 7.3 Trademarks
    4. 7.4 静電気放電に関する注意事項
    5. 7.5 用語集
  9. 8Revision History
  10. 9Mechanical, 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

6.2.2 Instrumentation Amplifier

The measurement of differential signals is quite common across many applications and are especially prevalent in biopotential sensors, for example electrocardiograms. Biopotential sensors can often be high impedance and require low input bias and current noise. Instrumentation amplifiers, introduced in the previous section, are commonly used to condition differential signals from biopotential sensors The LMC608x are a great choice in particular due to the extremely low input bias current and current noise, high common-mode rejection ratio (CMRR) and low power. A high performance instrumentation amplifier can be achieved by using the LMC608x and a pair of RES11A matched resistors.

GUID-20240112-SS0I-7P2G-SLVC-RSCN5ZW6J41S-low.svg Figure 6-7 Instrumentation Amplifier With the RES11A

Figure 6-7 shows an instrumentation amplifier design with a gain of 10V/V. The first RES11A is used to set the gain of the amplifier. In this case, a ratio of 1:9 is used to create a gain of 10V/V, but many different gain configurations are possible. The second RES11A is used to build a high CMRR, low drift, unity gain difference amplifier. This design provides a precision, differential-to-single ended amplifier with very high input impedance. A smaller, lower power design, a two op amp instrumentation amplifier, is possible using the dual channel LMC6082 and only one RES11A matched pair at the expense of higher CMRR.