SNOSB30P October   2008  – January 2015 LMH6554

PRODUCTION DATA.  

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

Package Options

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