JAJSFE9J August   2018  – February 2024 TLV9051 , TLV9052 , TLV9054

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 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 for Single Channel
    5. 6.5 Thermal Information for Dual Channel
    6. 6.6 Thermal Information for Quad Channel
    7. 6.7 Electrical Characteristics: VS (Total Supply Voltage) = (V+) – (V–) = 1.8 V to 5.5 V
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Operating Voltage
      2. 7.3.2 Rail-to-Rail Input
      3. 7.3.3 Rail-to-Rail Output
      4. 7.3.4 EMI Rejection
      5. 7.3.5 Overload Recovery
      6. 7.3.6 Packages With an Exposed Thermal Pad
      7. 7.3.7 Electrical Overstress
      8. 7.3.8 Input Protection
      9. 7.3.9 Shutdown Function
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Low-Side Current Sense Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      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 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

7.3.9 Shutdown Function

The TLV905xS devices feature SHDN pins that disable the op amp, placing the device into a low-power standby mode. In this mode, the op amp consumes 1µA of maximum quiescent current, referred to as IQSD. The SHDN pins are active low, meaning that shutdown mode is enabled when the input to the SHDN pin is a valid logic low.

The SHDN pins are referenced to the negative supply voltage of the op amp. The threshold of the shutdown feature lies around 800mV (typical) and does not change with respect to the supply voltage. Hysteresis has been included in the switching threshold for smooth switching characteristics. For shutdown behavior, the SHDN pins should be driven with valid logic signals. A valid logic low is defined as a voltage between V– and V– + 0.4V. A valid logic high is defined as a voltage between V– + 1.2V and V+. The shutdown pin circuitry includes a pull-up resistor, which will inherently pull the voltage of the pin to the positive supply rail if not driven. Thus, to enable the amplifier, the SHDN pins must either be left floating or driven to a valid logic high. To disable the amplifier, the SHDN pins must be driven to a valid logic low .While TI highly recommends that the shutdown pin be connected to a valid high or a low voltage or driven, TI has included a pull-up resistor connected to VCC. The maximum voltage allowed at the SHDN pins is (V+) + 0.5V. Exceeding this voltage level will damage the device.

The SHDN pins are high-impedance CMOS inputs. Dual op amp versions are independently controlled and quad op amp versions are controlled in pairs with logic inputs. For battery-operated applications, this feature may be used to greatly reduce the average current and extend battery life. The enable time is 35 µs for full shutdown of all channels; disable time is 6 µs. When disabled, the output assumes a high-impedance state. This architecture allows the TLV905xS to be operated as a gated amplifier (or to have the device output multiplexed onto a common analog output bus). Shutdown time (tOFF) depends on loading conditions and increases as load resistance increases. For shutdown (disable) within a specific shutdown time, the specified 10kΩ load to midsupply (VS / 2) is required. If using the TLV905xS without a load, the resulting turnoff time is significantly increased.