SNOS966Q May 2001  – September 2014 LMH6642 , LMH6643 , LMH6644

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (continued)
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2Handling Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5 3V Electrical Characteristics
    6. 7.6 5V Electrical Characteristics
    7. 7.7 ±5V Electrical Characteristics
    8. 7.8Typical Performance Characteristics
  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 Application
      1. 9.2.1Design Requirements
        1. 9.2.1.1Input and Output Topology
        2. 9.2.1.2Single Supply, Low Power Photodiode Amplifier
      2. 9.2.2Detailed Design Procedure
      3. 9.2.3Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
  12. 12Device and Documentation Support
    1. 12.1Related Links
    2. 12.2Trademarks
    3. 12.3Electrostatic Discharge Caution
    4. 12.4Glossary
  13. 13Mechanical, Packaging, and Orderable Information

1 Features

    (VS = ±5 V, TA = 25°C, RL = 2 kΩ, AV = +1. Typical Values Unless Specified).

  • −3 dB BW (AV = +1) 130 MHz
  • Supply Voltage Range 2.7 V to 12.8 V
  • Slew Rate, (AV = −1) 130V/µs(1)
  • Supply Current (no load) 2.7 mA/amp 
  • Output Short Circuit Current +115 mA to 145 mA
  • Linear Output Current ±75 mA
  • Input Common Mode Volt. 0.5 V Beyond V, 1 V from V+
  • Output Voltage Swing 40 mV from Rails 
  • Input Voltage Noise (100 kHz) 17nV/√Hz
  • Input Current Noise (100 kHz) 0.9pA/√Hz
  • THD (5MHz, RL = 2kΩ, VO = 2VPP, AV = +2) −62 dBc
  • Settling Time 68 ns
  • Fully Characterized for 3 V, 5 V, and ±5 V
  • Overdrive Recovery 100 ns
  • Output Short Circuit Protected(2)
  • No Output Phase Reversal with CMVR Exceeded
  • (1) Slew rate is the average of the rising and falling slew rates
    (2) Output short circuit duration is infinite for VS < 6 V at room temperature and below. For VS > 6 V, allowable short circuit duration is 1.5 ms.

2 Applications

  • Active Filters
  • CD/DVD ROM
  • ADC Buffer Amp
  • Portable Video
  • Current Sense Buffer

3 Description

The LMH664X family true single supply voltage feedback amplifiers offer high speed (130 MHz), low distortion (−62 dBc), and exceptionally high output current (approximately 75 mA) at low cost and with reduced power consumption when compared against existing devices with similar performance.

Input common mode voltage range extends to 0.5 V below V and 1 V from V+. Output voltage range extends to within 40 mV of either supply rail, allowing wide dynamic range especially desirable in low voltage applications. The output stage is capable of approximately 75 mA in order to drive heavy loads. Fast output Slew Rate (130 V/µs) ensures large peak-to-peak output swings can be maintained even at higher speeds, resulting in exceptional full power bandwidth of 40 MHz with a 3 V supply. These characteristics, along with low cost, are ideal features for a multitude of industrial and commercial applications.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
LMH6642SOT-23 (5)2.90 mm × 1.60 mm
SOIC (8)4.90 mm × 3.91 mm
LMH6643SOIC (8)3.00 mm × 3.00 mm
VSSOP (8)
LMH6644SOIC (14)8.64 mm × 3.91 mm
TSSOP (14)5.00 mm × 4.40 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Closed Loop Gain vs. Frequency
for Various Supplies

First_page_plot_freq_vs_gain.gif

4 Revision History

Changes from P Revision (March 2013) to Q Revision

  • Added, revised, or updated the following sections: Device Information Table, Application and Implementation; Power Supply Recommendations; Device and Documentation Support; Mechanical, Packaging, and Ordering Information Go
  • Changed "Junction Temperature Range" to "Operating Temperature Range"Go
  • Deleted TJ = 25°C for Electrical Characteristics tables.Go
  • Changed from "RL " to "Rf"Go
  • Deleted TJ = 25°C for Typical Performance CharacteristicsGo

Changes from O Revision (March 2013) to P Revision

  • Changed layout of National Data Sheet to TI formatGo