SLOSEB2 February   2026 VCA710

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Thermal Information
    4. 5.4 Recommended Operating Conditions
    5. 5.5 Electrical Characteristics for LNA
    6. 5.6 Electrical Characteristics for VGA
    7. 5.7 Typical Characteristics: Low-Noise Amplifier (LNA)
    8. 5.8 Typical Characteristics: Variable Gain Amplifier (VGA)
    9. 5.9 Typical Characteristics: Low-Noise Amplifier + Variable Gain Amplifier
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Typical Application
      1. 8.1.1 Ultrasound Flow Meter Front-End
      2. 8.1.2 Design Requirements
      3. 8.1.3 Detailed Design Procedure
      4. 8.1.4 Optical Receiver Front-end
    2. 8.2 Power Supply Recommendations
    3. 8.3 Layout
      1. 8.3.1 Layout Guidelines
      2. 8.3.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Tape and Reel Information
    2. 11.2 Mechanical Data

8.1.4 Optical Receiver Front-end

VCA710 can be used as a variable gain amplifier in the receive path of an optical signal chain. Since the VGA sub block of the VCA710 supports DC coupled connections the preceding TIA is directly connected to the non inverting input of the VGA. By shorting the EN_LNA to VEE_LNA, the LNA gets disabled thereby reducing overall power consumption. The VCA710 supports single ended DC input and translates the applied DC input to a differential output based on the applied GAIN_ADJ voltage. By applying an additional voltage on the VIM_VGA design for input common mode voltage to be within the tolerable input common mode voltage range.

VCA710 Optical receiver front end Figure 8-2 Optical receiver front end