SBOS110B May   1998  – June 2015 OPA2227 , OPA2228 , OPA227 , OPA228 , OPA4227 , OPA4228

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information: OPA227U/UA and OPA228U/UA
    5. 6.5 Thermal Information: OPA227P/PA and OPA228P/PA
    6. 6.6 Electrical Characteristics: OPAx227 Series (VS = ±5 V to ±15 V)
    7. 6.7 Electrical Characteristics: OPAx228 Series (VS = ±5 V to ±15 V)
    8. 6.8 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Offset Voltage and Drift
      2. 7.3.2 Operating Voltage
      3. 7.3.3 Offset Voltage Adjustment
      4. 7.3.4 Input Protection
      5. 7.3.5 Input Bias Current Cancellation
      6. 7.3.6 Noise Performance
      7. 7.3.7 Basic Noise Calculations
      8. 7.3.8 EMI Rejection Ratio (EMIRR)
        1. 7.3.8.1 EMIRR IN+ Test Configuration
    4. 7.4 Device Functional Modes
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Three-Pole, 20 kHz Low Pass, 0.5-dB Chebyshev Filter
      2. 8.1.2 Long-Wavelength Infrared Detector Amplifier
      3. 8.1.3 High Performance Synchronous Demodulator
      4. 8.1.4 Headphone Amplifier
      5. 8.1.5 Three-Band Active Tone Control (Bass, Midrange, and Treble)
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Using the OPAx228 in Low Gains
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 TINA-TI (Free Software Download)
        2. 11.1.1.2 TI Precision Designs
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Low Noise: 3nV/√Hz
  • Wide Bandwidth:
    • OPA227: 8 MHz, 2.3 V/μs
    • OPA228: 33 MHz, 10 V/μs
  • Settling Time: 5 μs
    (Significant Improvement Over OP-27)
  • High CMRR: 138 dB
  • High Open-loop Gain: 160 dB
  • Low Input Bias Current: 10 nA Maximum
  • Low Offset Voltage: 75 µV Maximum
  • Wide Supply Range: ±2.5 V to ±18 V
  • OPA227 Replaces OP-27, LT1007, MAX427
  • OPA228 Replaces OP-37, LT1037, MAX437
  • Single, Dual, and Quad Versions

2 Applications

  • Data Acquisition
  • Telecom Equipment
  • Geophysical Analysis
  • Vibration Analysis
  • Spectral Analysis
  • Professional Audio Equipment
  • Active Filters
  • Power Supply Controls

Input Referred Noise

OPA227 OPA2227 OPA4227 OPA228 OPA2228 OPA4228 typ_perf_curv_04_ivacnsd_v_f_sbos110.gif

3 Description

The OPAx22x series operational amplifiers combine low noise and wide bandwidth with high precision to make them the ideal choice for applications requiring both AC and precision DC performance.

The OPAx227 is unity-gain stable and features high slew rate (2.3V/µs) and wide bandwidth (8MHz). The OPAx228 is optimized for closed-loop gains of 5 or greater, and offers higher speed with a slew rate of 10V/µs and a bandwidth of 33MHz.

The OPAx227 and OPAx228 series operational amplifiers are ideal for professional audio equipment. In addition, low quiescent current and low cost make them ideal for portable applications requiring high precision.

The OPAx227 and OPAx228 series operational amplifiers are pin-for-pin replacements for the industry standard OP-27 and OP-37 with substantial improvements across the board. The dual and quad versions are available for space savings and per channel cost reduction.

The OPAx227, OPAx228, are available in DIP-8 and SO-8 packages. The OPA4227 and OPA4228 are available in DIP-14 and SO-14 packages with standard pin configurations. Operation is specified from –40°C to 85°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
OPA227
OPA228
PDIP (8) 9.81 mm × 6.35 mm
SOIC (8) 4.90 mm × 3.91 mm
OPA2227
OPA2228
PDIP (8) 9.81 mm × 6.35 mm
SOIC (8) 4.90 mm × 3.91 mm
OPA4227
OPA4228
PDIP (14) 19.30 mm × 6.35 mm
SOIC (14) 8.65 mm × 3.91 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

4 Revision History

Changes from A Revision (January 2005) to B Revision

  • Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo