SBOSA17 September   2024 TRF1305B1

ADVMIX  

  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 - TRF1305B1
    6. 6.6 Typical Characteristics - TRF1305B1
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Fully Differential RF Amplifier
      2. 7.3.2 Output Common-Mode Control
      3. 7.3.3 Internal Resistor Configuration
    4. 7.4 Device Functional Modes
      1. 7.4.1 MODE Pin
        1. 7.4.1.1 Input Common-Mode Extension
      2. 7.4.2 Power-Down Mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Input and Output Interface Considerations
        1. 8.1.1.1 Single-Ended Input
        2. 8.1.1.2 Differential Input
        3. 8.1.1.3 DC Coupling Considerations
      2. 8.1.2 Gain Adjustment With External Resistors in a Differential Input Configuration
    2. 8.2 Typical Application
      1. 8.2.1 TRF1305x1 as ADC Driver in a Zero-IF Receiver
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Supply Voltages
      2. 8.3.2 Single-Supply Operation
      3. 8.3.3 Split-Supply Operation
      4. 8.3.4 Supply Decoupling
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Thermal Considerations
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    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

7.4.1.1 Input Common-Mode Extension

The TRF1305x1 supports a VICM voltage closer to either VS+ or VS– voltage than the default specified input common-mode range in the Electrical Characteristics, when configured in one of the VICM extension modes. The VICM extension mode can only be used in D2D configuration.

When configured in the low-side VICM extension mode, TRF1305B1 supports a 450mV lower input common-mode voltage than the default option. For example, the lower limit of VICM voltage range extends from a default value of VS– + 1.5V to VS– + 1.05V for the TRF1305B1 variant, and the higher limit also shifts lower from a default value of VS– + 3.5V to VS– + 3.05V. At the lowest VICM voltage, approximately 15mA current must be sunk by the external circuitry connected to the INP and INM pins.

When configured in the high-side VICM extension mode, TRF1305B1 supports a 450mV higher input common-mode voltage than the default option. For example, the higher limit of VICM voltage range extends from a default value of VS– + 3.5V to VS– + 3.95V for the TRF1305B1 variant, and the lower limit also shifts up from a default of VS– + 1.5V to VS– + 1.95V. At the highest VICM voltage, approximately 15mA current must be sourced by the external circuitry connected to the INP and INM pins.

Either resistors connected to supplies or external current sources can be used to sink or source the currents flowing out or into to the INP and INM pins during the low-side or high-side VICM extension modes, respectively.