SBOS867 August 2017 OPA838

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  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: VS = 5 V
    6. 7.6Electrical Characteristics: VS = 3 V
    7. 7.7Typical Characteristics: VS = 5 V
    8. 7.8Typical Characteristics: VS = 3 V
    9. 7.9Typical Characteristics: Over Supply Range
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1Input Common-Mode Voltage Range
      2. 8.3.2Output Voltage Range
      3. 8.3.3Power-Down Operation
      4. 8.3.4Trade-offs in Selecting The Feedback Resistor Value
      5. 8.3.5Driving Capacitive Loads
    4. 8.4Device Functional Modes
      1. 8.4.1Split-Supply Operation (±1.35 V to ±2.7 V)
      2. 8.4.2Single-Supply Operation (2.7 V to 5.4 V)
    5. 8.5Power Shutdown Operation
  9. Application and Implementation
    1. 9.1Application Information
      1. 9.1.1Noninverting Amplifier
      2. 9.1.2Inverting Amplifier
      3. 9.1.3Output DC Error Calculations
      4. 9.1.4Output Noise Calculations
      5. 9.1.5High-Gain Differential I/O Designs
        1. 9.1.5.1Differential I/O Design Requirements
        2. 9.1.5.2Detailed Design Procedure
      6. 9.1.6Transimpedance Amplifiers
      7. 9.1.7Design Requirements
        1. 9.1.7.1Detailed Design Procedure
  10. 10Power Supply Recommendations and Thermal Notes
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
  12. 12Device and Documentation Support
    1. 12.1Device Support
      1. 12.1.1Device Support
        1. 12.1.1.1TINA-TI Simulation Model Features
    2. 12.2Documentation Support
      1. 12.2.1Related Documentation
      2. 12.2.2Receiving Notification of Documentation Updates
      3. 12.2.3Community Resources
    3. 12.3Trademarks
    4. 12.4Electrostatic Discharge Caution
    5. 12.5Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Features

  • Gain Bandwidth Product: 300 MHz
  • Very-Low (Trimmed) Supply Current: 950 µA
  • Bandwidth: 90 MHz (AV = 6 V/V)
  • High Full-Power Bandwidth: 45 MHz, 4 VPP
  • Negative Rail Input, Rail-to-Rail Output
  • Single-Supply Operating Range: 2.7 V to 5.4 V
  • 25°C Input Offset: ±125 µV (Maximum)
  • Input Offset Voltage Drift: < ±1.6 µV/°C (Maximum)
  • Input Voltage Noise: 1.8 nV/√Hz (> 200 Hz)
  • Input Current Noise: 1 pA/√Hz (> 2000 Hz)
  • < 5-µA Shutdown Current for Power Savings

Applications

  • Low-Power Transimpedance Amplifiers
  • Low-Noise High-Gain Stages
  • 12-Bit to 16-Bit Low-Power SAR ADC Drivers
  • High-Gain Active Filter Designs
  • Ultrasonic Flow Meters

Description

The OPA838 decompensated voltage feedback operational amplifier provides a high 300-MHz gain bandwidth product with 1.8-nV/√Hz input noise voltage, requiring only a trimmed 0.95-mA supply current. These features combine to provide an extremely power-efficient solution for photodiode transimpedance designs and high-voltage gain stages, which require the lowest input voltage noise in signal receiver applications.

Operating at the minimum recommended noninverting gain of 6 V/V results in a 90-MHz, –3-dB bandwidth. Extremely low input noise and offset voltage make the OPA838 particularly suitable for high gains. Even at a DC-coupled gain of 1000 V/V, a 300-kHz signal bandwidth is available with a maximum output offset voltage of ±125 mV.

The single-channel OPA838 is available in a 6-pin SOT-23 package, 6-pin SC70 package (that includes a power shutdown feature) and 5-pin SC70 package.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
OPA838SOT-23 (6)2.90 mm × 1.60 mm
SC70 (5)2.00 mm × 1.25 mm
SC70 (6)2.00 mm × 1.25 mm
  1. For all available packages, see the package option addendum at the end of the data sheet.

SPACE

SPACE

Single 3-V Supply, < 3-mW Photodiode Amplifier With < 1.1-pA/√Hz Total Input-Referred Current Noise and 100-kΩ Gain With Overall 1-MHz SSBW

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