SBOS724 September 2015 OPA1688

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Device Family Comparison Table
  7. Pin Configuration and Functions
  8. Specifications
    1. 8.1Absolute Maximum Ratings
    2. 8.2ESD Ratings
    3. 8.3Recommended Operating Conditions
    4. 8.4Thermal Information: OPA1688
    5. 8.5Thermal Information: OPA1689
    6. 8.6Electrical Characteristics
    7. 8.7Typical Characteristics: Table of Graphs
    8. 8.8Typical Characteristics
  9. Detailed Description
    1. 9.1Overview
    2. 9.2Functional Block Diagram
    3. 9.3Feature Description
      1. 9.3.1EMI Rejection
      2. 9.3.2Phase-Reversal Protection
      3. 9.3.3Capacitive Load and Stability
    4. 9.4Device Functional Modes
      1. 9.4.1Common-Mode Voltage Range
      2. 9.4.2Electrical Overstress
      3. 9.4.3Overload Recovery
  10. 10Applications and Implementation
    1. 10.1Application Information
    2. 10.2Typical Application
      1. 10.2.1Design Requirements
      2. 10.2.2Detailed Design Procedure
      3. 10.2.3Application Curves
  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. 13.2Documentation Support
      1. 13.2.1Related Documentation
    3. 13.3Related Links
    4. 13.4Community Resources
    5. 13.5Trademarks
    6. 13.6Electrostatic Discharge Caution
    7. 13.7Glossary
  14. 14Mechanical, Packaging, and Orderable Information

1 Features

  • THD+N, 50 mW, 32 Ω, 1 kHz, –109 dB
  • Wide Supply Range:
    • 4.5 V to 36 V, ±2.25 V to ±18 V
  • Low Offset Voltage: ±0.25 mV
  • Low Offset Drift: ±0.5 µV/°C
  • Gain Bandwidth: 10 MHz
  • Low Input Bias Current: ±10 pA
  • Low Quiescent Current: 1.6 mA per Amplifier
  • Low Noise: 8 nV/√Hz
  • EMI- and RFI-Filtered Inputs
  • Input Range Includes Negative Supply
  • Input Range Operates to Positive Supply
  • Rail-to-Rail Output
  • High Common-Mode Rejection: 120 dB
  • Industry-Standard Packages:
    • SOIC-8 and SOIC-14
  • microPackages:
    • Dual in WSON-8, Quad in VQFN-16

2 Applications

  • Headphone Driver
  • Analog and Digital Mixers
  • Audio Effects Processors
  • Transducer Amplifiers
  • Musical Instruments
  • A/V Receivers
  • DVD and Blu-Ray™ Players
  • Car Audio Systems

3 Description

The OPA1688 and OPA1689 are a family of SoundPlus™ 36-V, single-supply, low-noise operational amplifiers capable of operating on supplies ranging from 4.5 V (±2.25 V) to 36 V (±18 V). This latest addition of high-voltage audio operational amplifiers, in conjunction with the OPA16xx devices provide a family of bandwidth, noise, and power options to meet the needs of a wide variety of applications. The OPA168x are available in micropackages, and offer low offset, drift, and quiescent current. These devices also offer wide bandwidth, fast slew rate, and high output current drive capability. The dual and quad versions all have identical specifications for maximum design flexibility.

Unlike most op amps that are specified at only one supply voltage, the OPA168x family is specified from 4.5 V to 36 V. Input signals beyond the supply rails do not cause phase reversal. The input can operate 100 mV below the negative rail and within 2 V of the top rail during normal operation. Note that these devices can operate with full rail-to-rail input 100 mV beyond the top rail, but with reduced performance within 2 V of the top rail.

The OPA168x series of op amps are specified from –40°C to 85°C.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
OPA1688SOIC (8)4.90 mm × 3.91 mm
WSON (8)3.00 mm × 3.00 mm
OPA1689(2)SOIC (14)8.65 mm × 3.91 mm
VQFN (16)3.50 mm × 3.50 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.
  2. Product-preview device.

Headphone Amplifier Circuit Configuration

OPA1688 OPA1689 ai_headphone_amp_sbos724.gif

Superior THD Performance
(f = 1 kHz, BW = 80 kHz, VS = ±5 V)

OPA1688 OPA1689 C029_SBOS724.png