SBOSAI8A March   2025  – July 2025 INA630

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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
    6. 6.6 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 Setting the Gain
        1. 7.3.1.1 Gain Error and Drift
      2. 7.3.2 Linear Input Voltage Range
      3. 7.3.3 Input Protection
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Reference Pin
      2. 8.1.2 Input Bias Current Return Path
    2. 8.2 Typical Applications
      1. 8.2.1 Current Shunt Monitoring in Battery Testing Systems
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Examples
  10. 9 Device and Documentation Support
    1. 9.1 Third-Party Products Disclaimer
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.1 Setting the Gain

Figure 7-2 shows that the gain of the INA630 is set by a resistor divider (R1, R2) connected between the output, feedback, and reference pin.

INA630 Simplified Diagram of the INA630 With Gain EquationsFigure 7-2 Simplified Diagram of the INA630 With Gain Equations

The value of R1 and R2 is selected according to:

Equation 1. G = 1 + R 2 R 1

Table 7-1 lists several commonly used gains and feedback resistor values. The table also shows the theoretical gain error that is caused by the worst-case tolerance of available 0.05% resistors, which means that both resistors have the opposite absolute error.

Table 7-1 Examples for Feedback Resistor Values (0.05%) and Maximum Gain Error
DESIRED GAINR1 (Ω) (0.05%)R2 (Ω) (0.05%)GAIN ERROR (MAX) (%)
201k18.88k0.5
501k49.3k0.28
801k78.7k0.23
1001k98.81k0.09
1201k118.35k0.54
1501k148.6k0.24
2001k198.1k0.4
5001k498.8k0.01
10001k1M0.1