SBOS427 June 2017 OPA145

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: OPA145
    5. 7.5Thermal Information: OPA2145
    6. 7.6Thermal Information: OPA4145
    7. 7.7Electrical Characteristics: VS = 4.5 V to 36 V; ±2.25 V to ±18 V
    8. 7.8Typical Characteristics
    9. 7.9Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1Operating Voltage
      2. 8.3.2Capacitive Load and Stability
      3. 8.3.3Output Current Limit
      4. 8.3.4Noise Performance
      5. 8.3.5Basic Noise Calculations
      6. 8.3.6Phase-Reversal Protection
      7. 8.3.7Electrical Overstress
      8. 8.3.8EMI Rejection
      9. 8.3.9EMIRR +IN Test Configuration
    4. 8.4Device Functional Modes
  9. Application and Implementation
    1. 9.1Application Information
    2. 9.2Typical Application
      1. 9.2.1Design Requirements
      2. 9.2.2Detailed Design Procedure
      3. 9.2.3Application Curve
  10. 10System Examples
    1. 10.116-bit, 100-kSPS, Fully Differential Transimpedance Imaging and Measurement
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1Layout Guidelines
    2. 12.2Layout Example
  13. 13Device and Documentation Support
    1. 13.1Device Support
      1. 13.1.1Development Support
        1. 13.1.1.1TINA-TI (Free Software Download)
        2. 13.1.1.2WEBENCH Filter Designer Tool
        3. 13.1.1.3TI Precision Designs
    2. 13.2Documentation Support
      1. 13.2.1Related Documentation
    3. 13.3Related Links
    4. 13.4Receiving Notification of Documentation Updates
    5. 13.5Community Resources
    6. 13.6Trademarks
    7. 13.7Electrostatic Discharge Caution
    8. 13.8Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Features

  • Best Bandwidth and Slew-Rate-to-Power Ratio:
    • Gain-Bandwidth Product: 5.5 MHz
    • Slew Rate: 20 V/μs
    • Low Supply Current: 475 µA (maximum)
  • High Precision:
    • Very Low Offset: 150 μV (maximum)
    • Very Low Offset Drift: 1 μV/°C (maximum)
  • Low Input Bias Current: 2 pA
  • Excellent Noise Performance:
    • Very Low Voltage Noise: 7 nV/√Hz
    • Very Low Current Noise: 0.8 fA/√Hz
  • Input-Voltage Range Includes V– Supply
  • Single-Supply Operation: 4.5 V to 36 V
  • Dual-Supply Operation: ±2.25 V to ±18 V

Applications

  • Analog I/O Modules
  • Battery-Powered Instruments
  • Industrial Controls
  • Medical Instrumentation
  • Photodiode Amplifiers
  • Active Filters
  • Data Acquisition Systems
  • Automatic Test Systems

Description

The OPA145, OPA2145, and OPA4145 operational amplifier (op amp) family is a series of low-power JFET input amplifiers that feature excellent drift, low current noise, and pico-ampere input bias current, making these devices a suitable choice for amplifying small signals from high-impedance sensors. The rail-to-rail output swing interfaces to modern, single-supply, precision analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). In addition, the input range that includes V– allows designers to simplify power management and take advantage of the single-supply, low-noise JFET architecture.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
OPA145SOIC (8)4.90 mm × 3.91 mm
VSSOP (8)3.00 mm × 3.00 mm
SOT-23 (5)2.90 mm × 1.60 mm
WSON (8)3.00 mm × 3.00 mm
OPA2145SOIC (8)4.90 mm × 3.91 mm
VSSOP (8)3.00 mm × 3.00 mm
WSON (8)3.00 mm × 3.00 mm
OPA4145TSSOP (14)5.00 mm × 4.40 mm
SOIC (14)8.65 mm × 3.91 mm
QFN (16)4.00 mm × 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

OPA145 Excels in 16-bit, 100-kSPS Fully Differential Transimpedance Imaging Application

OPA145 OPA2145 OPA4145 S001_SBOS427.gif

OPA145 Precision JFET Technology Offers Excellent Linear Input Impedance

OPA145 OPA2145 OPA4145 C013_SBOS427.png