SNOSB30P October 2008  – January 2015 LMH6554

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Typical Application Schematic
  5. Revision History
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2ESD Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5Electrical Characteristics: +5 V
    6. 7.6Typical Performance Characteristics VS = ±2.5 V
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
    4. 8.4Device Functional Modes
  9. Application and Implementation
    1. 9.1Application Information
    2. 9.2Typical Applications
      1. 9.2.1Single-Ended Input to Differential Output Operation
        1. 9.2.1.1Design Requirements
        2. 9.2.1.2Detailed Design Procedure
          1. 9.2.1.2.1Enable / Disable Operation
          2. 9.2.1.2.2Single-Ended Input to Differential Output Operation
          3. 9.2.1.2.3Driving Capacitive Loads
        3. 9.2.1.3Application Curves
      2. 9.2.2Fully Differential Operation
      3. 9.2.3Single Supply Operation
      4. 9.2.4Driving Analog-to-Digital Converters
      5. 9.2.5Output Noise Performance and Measurement
      6. 9.2.6Balanced Cable Driver
  10. 10Power Supply Recommendations
    1. 10.1Power Supply Bypassing
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
    3. 11.3Power Dissipation
    4. 11.4ESD Protection
  12. 12Device and Documentation Support
    1. 12.1Device Support
      1. 12.1.1Third-Party Products Disclaimer
    2. 12.2Documentation Support
      1. 12.2.1Related Documentation
    3. 12.3Trademarks
    4. 12.4Electrostatic Discharge Caution
    5. 12.5Glossary
  13. 13Mechanical, Packaging, and Orderable Information

10 Power Supply Recommendations

The LMH6554 can be used with any combination of positive and negative power supplies as long as the combined supply voltage is between 4.7 V and 5.25 V. The LMH6554 will provide best performance when the output voltage is set at the mid supply voltage, and when the total supply voltage is set to 5 V.

Power supply bypassing as shown in Power Supply Bypassing is important and power supply regulation should be within 5% or better.

10.1 Power Supply Bypassing

The LMH6554 requires supply bypassing capacitors as shown in Figure 36 and Figure 37. The 0.01-μF and 0.1-μF capacitors should be leadless SMT ceramic capacitors and should be no more than 3 mm from the supply pins. These capacitors should be star routed with a dedicated ground return plane or trace for best harmonic distortion performance. Thin traces or small vias will reduce the effectiveness of bypass capacitors. Also shown in both figures is a capacitor from the VCM and VEN pins to ground. These inputs are high impedance and can provide a coupling path into the amplifier for external noise sources, possibly resulting in loss of dynamic range, degraded CMRR, degraded balance and higher distortion.

30073263.gifFigure 36. Split Supply Bypassing Capacitors
30073264.gifFigure 37. Single Supply Bypassing Capacitors