SGLS185F September 2003 – May 2016 INA139-Q1 , INA169-Q1
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1 Application Information
- 8.2 Typical Applications
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
10 Layout
10.1 Layout Guidelines
Figure 9 shows the basic connection of the INA1x9-Q1. Connect input pins VIN+ and VIN− as closely as possible to the shunt resistor to minimize any resistance in series with the shunt resistance. Output resistor RL is shown connected between the OUT pin and ground. Best accuracy is achieved with the output voltage measured directly across RL. Measuring directly across RL is especially important in high-current systems where load current could flow in the ground connections and affect measurement accuracy.
No power-supply bypass capacitors are required for stability of the INA1x9-Q1. However, applications with noisy or high-impedance power supplies may require decoupling capacitors to reject power-supply noise. Connect bypass capacitors close to the device pins.
10.2 Layout Example
Figure 19. Typical Layout Example