SBOS512E March   2010  – November 2020 OPA2365-Q1 , OPA365-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Operating Characteristics
      2. 7.3.2 Basic Amplifier Configurations
      3. 7.3.3 Input and ESD Protection
      4. 7.3.4 Rail-to-Rail Input
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Capacitive Loads
      2. 8.1.2 Achieving an Output Level of Zero Volts (0 V)
      3. 8.1.3 Active Filtering
      4. 8.1.4 Driving an ADS7822-Q1 Analog-to-Digital Converter
      5. 8.1.5 Driving ADS1115-Q1 Analog-to-Digital Converter
    2. 8.2 Typical Application
      1. 8.2.1 Fast Settling Peak Detector
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Bandpass Filter 1.5 kHz to 160 kHz and 40-db Flat Gain
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.2.2.2 Detailed Design Procedure

Some applications need bandpass filter–that is, radar or audio signal precessing. The cross over frequencies and flat gain can be adjusted by changing the resistors and capacitors value according to applications.

The circuit is designed for 5-V supply and 20-mV input signal. With a flat gain of 100 dB or 40 dB, the peak output signal is 2 V. The reference signal is at half way of 5 V, which is 2.5 V.

Equation 1. GUID-B5394F4B-9A3C-4CFE-9EA2-B70FC8D0B9BA-low.gif
Equation 2. GUID-219A1D3A-2D25-48DD-866C-9A01E5770916-low.gif
Equation 3. GUID-32DF021E-050C-48D9-961C-44A217132DA5-low.gif
Equation 4. GUID-2C9A5C5F-259F-4172-9F02-1C0AD2E00EC5-low.gif
Equation 5. Flat Gain of 100 or 40 dB between 1.54 kHz and 156 kHz
Equation 6. 20 db/decade below 1.54 KHz
Equation 7. –20 dB/decade above 156 kHz
Equation 8. Bandpass between 1.54 kHz and 156 kHz