SLOS681C January   2011  – August 2019 DRV632

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Diagram
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Operating Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Line Driver Amplifiers
      2. 9.3.2 Charge-Pump Flying Capacitor and PVSS Capacitor
      3. 9.3.3 Decoupling Capacitors
      4. 9.3.4 Gain-Setting Resistor Ranges
      5. 9.3.5 Input-Blocking Capacitors
      6. 9.3.6 DRV632 UVP Operation
      7. 9.3.7 External Undervoltage Detection
    4. 9.4 Device Functional Modes
      1. 9.4.1 Using the DRV632 as a Second-Order Filter
      2. 9.4.2 Mute Mode
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Charge-Pump Flying, PVSS and Decoupling Capacitors
        2. 10.2.2.2 Second-Order Active Low-Pass Filters
        3. 10.2.2.3 UVP Resistor Divider
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 Gain-Setting Resistors
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Development Support
    2. 13.2 Community Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

9.3.4 Gain-Setting Resistor Ranges

The gain-setting resistors, RIN and Rfb, must be chosen so that noise, stability, and input capacitor size of the DRV632 are kept within acceptable limits. Voltage gain is defined as Rfb divided by RIN.

Selecting values that are too low demands a large input ac-coupling capacitor, CIN. Selecting values that are too high increases the noise of the amplifier. Table 1 lists the recommended resistor values for different inverting-input gain settings.

Table 1. Recommended Resistor Values

GAIN INPUT RESISTOR VALUE, RIN FEEDBACK RESISTOR VALUE, Rfb
–1 V/V 10 kΩ 10 kΩ
–1.5 V/V 8.2 kΩ 12 kΩ
–2 V/V 15 kΩ 30 kΩ
–10 V/V 4.7 kΩ 47 kΩ