SBOS350B December   2006  – December 2024 OPA4830

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Related Products
  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 VS = ±5V
    6. 6.6  Electrical Characteristics VS = 5V
    7. 6.7  Electrical Characteristics VS = 3V
    8. 6.8  Typical Characteristics: VS = ±5V
    9. 6.9  Typical Characteristics: VS = ±5V, Differential Configuration
    10. 6.10 Typical Characteristics: VS = 5V
    11. 6.11 Typical Characteristics: VS = 5V, Differential Configuration
    12. 6.12 Typical Characteristics: VS = 3V
    13. 6.13 Typical Characteristics: VS = 3V, Differential Configuration
  8. 7 Parameter Measurement Information
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1  Wideband Voltage-Feedback Operation
      2. 8.1.2  DC Level-Shifting
      3. 8.1.3  AC-Coupled Output Video Line Driver
      4. 8.1.4  Noninverting Amplifier With Reduced Peaking
      5. 8.1.5  Single-Supply Active Filter
      6. 8.1.6  Differential Interface Applications
      7. 8.1.7  DC-Coupled Single-to-Differential Conversion
      8. 8.1.8  Low-Power, Differential I/O, 4th-Order Active Filter
      9. 8.1.9  Dual-Channel, Differential ADC Driver
      10. 8.1.10 Video Line Driving
      11. 8.1.11 4-Channel DAC Transimpedance Amplifier
      12. 8.1.12 Operating Suggestions: Optimizing Resistor Values
      13. 8.1.13 Bandwidth vs Gain: Noninverting Operation
      14. 8.1.14 Inverting Amplifier Operation
      15. 8.1.15 Output Current and Voltages
      16. 8.1.16 Driving Capacitive Loads
      17. 8.1.17 Distortion Performance
      18. 8.1.18 Noise Performance
      19. 8.1.19 DC Accuracy and Offset Control
    2. 8.2 Power Supply Recommendations
      1. 8.2.1 Thermal Analysis
    3. 8.3 Layout
      1. 8.3.1 Layout Guidelines
        1. 8.3.1.1 Input and ESD Protection
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Design-In Tools
        1. 9.1.1.1 Demonstration Fixtures
        2. 9.1.1.2 Macromodels and Applications Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • PW|14
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.1.8 Low-Power, Differential I/O, 4th-Order Active Filter

The OPA4830 can give a very capable gain block for active filters. The quad design lends a very well to differential active filters. Where the filter topology is looking for a simple gain function to implement the filter, the noninverting configuration is preferred to isolate the filter elements from the gain elements in the design. See Figure 8-12 for an example of a 10MHz, 4th-order Butterworth, low-pass Sallen-Key filter. The design places the higher Q stage first to allow the lower Q 2nd stage to roll off the peaked noise of the first stage. The resistor values have been adjusted slightly to account for the amplifier group delay.

OPA4830 Low-Power, Differential I/O, 4th-Order Butterworth Active Filter Figure 8-12 Low-Power, Differential I/O, 4th-Order Butterworth Active Filter

While this circuit is bipolar, using ±5V supplies, can easily be adapted to single-supply operation. This configuration adds two real zeroes in the response, transforming this circuit into a bandpass. The frequency response for the filter of Figure 8-12 is illustrated in Figure 8-13.

OPA4830 Differential 4th-Order, 10MHz Butterworth Filter Figure 8-13 Differential 4th-Order, 10MHz Butterworth Filter