JAJSKD0 December   2023 TRF1305B2

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Device Comparison
  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 - TRF1305B2
    6. 6.6 Typical Characteristics - TRF1305B2
  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 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 TRF1305x2 as ADC Driver in a Zero-IF Receiver
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
    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 ドキュメントの更新通知を受け取る方法
    2. 9.2 サポート・リソース
    3. 9.3 Trademarks
    4. 9.4 静電気放電に関する注意事項
    5. 9.5 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 TRF1305x2 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 VS2+, or force a voltage on the MODE pin. Internally, the MODE pin is referenced to VS– through a 3-kΩ resistor (see Section 7.2). The selected mode applies to both channels.

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 NUMBERTRF1305x2:
PULLUP RESISTOR TO VS2+
(±2% MAXIMUM TOLERANCE)		MODE PIN VOLTAGE, VMODE (V)VICM RANGE EXTENSION(1)
0OPENVS–Default VICM range
125.6 kΩVS– + 0.5 VLow side, extends VICM range closer to VS–
212.8 kΩVS– + 0.95 VHigh side, extends VICM range closer to VS+
N/ADo not use pullup resistor < 10 kΩ or set VMODE > VS– + 1.15 V

To switch the mode without turning the supplies off, use a switch or MUX connected between the pullup resistor options and VS2+, 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.

(1) Only available in D2D configuration. Non-default mode requires the ability to source or sink current at the inputs. See also Section 7.4.1.1.