ZHCS294G June 2011 – May 2024 TPA6211A1-Q1
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Pin Configuration and Functions
- 5 Specifications
- 6 Detailed Description
-
7 Application and Implementation
- 7.1 Application Information
- 7.2
Typical Applications
- 7.2.1
Typical Differential Input Application
- 7.2.1.1 Design Requirements
- 7.2.1.2 Detailed Design Procedure
- 7.2.1.3 Application Curves
- 7.2.2 Other Application Circuits
- 7.2.1
Typical Differential Input Application
- 7.3 Power Supply Recommendations
- 7.4 Layout
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
7.2.1.2.1 Resistors (RI)
The input resistor (RI) can be selected to set the gain of the amplifier according to Equation 19.
Equation 19. 
The internal feedback resistors (RF) are trimmed to 40 k?.
Resistor matching is very important in fully differential amplifiers. The balance of the output on the reference voltage depends on matched ratios of the resistors. CMRR, PSRR, and the cancellation of the second harmonic distortion diminishes if resistor mismatch occurs. Therefore, TI recommends 1%-tolerance resistors or better to optimize performance.