ZHCSLH7C June   2020  – June 2021 INA2290 , INA290 , INA4290

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Amplifier Input Common-Mode Range
      2. 7.3.2 Input-Signal Bandwidth
      3. 7.3.3 Low Input Bias Current
      4. 7.3.4 Low VSENSE Operation
      5. 7.3.5 Wide Fixed-Gain Output
      6. 7.3.6 Wide Supply Range
    4. 7.4 Device Functional Modes
      1. 7.4.1 Unidirectional Operation
      2. 7.4.2 High Signal Throughput
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 RSENSE and Device Gain Selection
      2. 8.1.2 Input Filtering
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Overload Recovery With Negative VSENSE
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 静电放电警告
    6. 11.6 术语表
  12. 12Mechanical, Packaging, and Orderable Information

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7.3.5 Wide Fixed-Gain Output

The INAx290 gain error is < 0.1% at room temperature for most gain options, with a maximum drift of 5 ppm/°C over the full temperature range of –40°C to +125°C. The INAx290 is available in multiple gain options of 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V, which is selected based on the desired signal-to-noise ratio and other system requirements of the design.

The INAx290 closed-loop gain is set by a precision, low-drift internal resistor network. The ratio of these resistors are excellently matched, although the absolute values can vary significantly. TI does not recommend adding additional resistance around the INAx290 to change the effective gain because of this variation. Table 7-1 describes the typical values of the internal gain resistors seen in the functional diagram above.

Table 7-1 Fixed Gain Resistor
GAINR1RL
20 (V/V)25 kΩ500 kΩ
50 (V/V)10 kΩ500 kΩ
100 (V/V)10 kΩ1000 kΩ
200 (V/V)5 kΩ1000 kΩ
500 (V/V)2 kΩ1000 kΩ