SBOS196H December   2001  – September 2015 OPA656

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Related Operational Amplifier Products
  6. Pin Configuration and Functions
  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
    6. 7.6 Electrical Characteristics: VS = ±5 V: High Grade DC Specifications
    7. 7.7 Typical Characteristics: VS = ±5 V
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Feature Description
      1. 8.2.1 Input and ESD Protection
    3. 8.3 Device Functional Modes
      1. 8.3.1 Split-Supply Operation (±4 V to ±6 V)
      2. 8.3.2 Single-Supply Operation (8 V to 12 V)
  9. Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Wideband, Noninverting Operation
      2. 9.1.2 Wideband, Inverting Gain Operation
      3. 9.1.3 Operating Suggestions
        1. 9.1.3.1 Setting Resistor Values to Minimize Noise
        2. 9.1.3.2 Frequency Response Control
        3. 9.1.3.3 Driving Capacitive Loads
        4. 9.1.3.4 Distortion Performance
        5. 9.1.3.5 DC Accuracy and Offset Control
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Demonstration Fixtures
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • 500 MHz Unity-gain Bandwidth
  • Low Input Bias Current: 2 pA
  • Low Offset And Drift: ±250 µV, ±2 μV/°C
  • Low Distortion: 74-dB SFDR at 5 MHz
  • High-Output Current: 70 mA
  • Low Input Voltage Noise: 7 nV/√Hz

2 Applications

  • Wideband Photodiode Amplifiers
  • Sample-and-Hold Buffers
  • CCD Output Buffers
  • ADC Input Buffers
  • Wideband Precision Amplifiers
  • Test and Measurement Front Ends

3 Description

The OPA656 device combines a very wideband, unity-gain stable, voltage-feedback operational amplifier with a FET-input stage to offer an ultra high dynamic-range amplifier for Analog-to-Digital Converter (ADC) buffering and transimpedance applications. Extremely low DC errors give good precision in optical applications.

The high unity-gain stable bandwidth and JFET input allows exceptional performance in high-speed, low-noise integrators.

The high input impedance and low bias current provided by the FET input is supported by the ultra-low 7-nV/√Hz input voltage noise to achieve a very low integrated noise in wideband photodiode transimpedance applications.

Broad transimpedance bandwidths are achievable given the OPA656 device’s high 230-MHz gain bandwidth product. As shown below, a –3-dB bandwidth of 1 MHz is provided even for a high 1-MΩ transimpedance gain from a 47-pF source capacitance.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
OPA656 SOIC (8) 2.90 mm × 1.60 mm
SOT-23 (5) 4.90 mm × 3.91 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

1-MΩ Transimpedance Bandwidth

OPA656 fp_transimpedance_bw_sbos196.gif

Wideband Photodiode Transimpedance Amplifier

OPA656 fp_wideband_photodiode_t_a_sbos196.gif