JAJSMG1 September   2024 TRF1305B1

ADVMIX  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  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 ドキュメントの更新通知を受け取る方法
    3. 9.3 サポート・リソース
    4. 9.4 Trademarks
    5. 9.5 静電気放電に関する注意事項
    6. 9.6 用語集
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

7.4.1 MODE Pin

The TRF1305x1 have additional useful features that can be configured using the MODE pin. To select the device mode, either connect a ±2% maximum tolerance pullup resistor between the MODE pin and VS+, or force a voltage on the MODE pin. Internally, the MODE pin is referenced to VS– through a 3kΩ resistor (see Section 7.2).

Table 7-2 provides the value of the pullup resistor for each mode, the expected voltage, VMODE, at the MODE pin when the pullup resistor is used or the necessary VMODE voltage to set the device mode, and the mode configurations. The VMODE voltage thresholds are approximately midway between the adjacent modes typical VMODE voltage. If the mode functionality is used, use a decoupling capacitor on the MODE pin.

Table 7-2 MODE Pin Configuration
MODE NUMBER PULLUP RESISTOR TO VS+
(±2% MAXIMUM TOLERANCE)		 MODE PIN VOLTAGE, VMODE (V) VICM RANGE EXTENSION(1)
0 OPEN VS– Default VICM range
1 25.6kΩ VS– + 0.5V Low side, extends VICM range closer to VS–
2 12.8kΩ VS– + 0.95V High side, extends VICM range closer to VS+
N/A Do not use pullup resistor < 10kΩ or set VMODE > VS– + 1.15V
(1) Only available in D2D configuration.

To switch the mode without turning the supplies off, use a switch or MUX connected between the pullup resistor options and VS+, or force a mode-appropriate VMODE voltage. However, powering down the device using the power-down feature between mode changes is preferred. The low-side and high-side VICM range extension modes source and sink currents, respectively (see also Section 7.4.1.1). Ensure that the external circuitry is ready to sink or source these currents before the device is put in the active mode from the powered-down state.