SBOS791A June 2017  – November 2017 OPA1641-Q1 , OPA1642-Q1

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1Absolute Maximum Ratings
    2. 6.2ESD Ratings
    3. 6.3Recommended Operating Conditions
    4. 6.4Thermal Information
    5. 6.5Electrical Characteristics
    6. 6.6Typical Characteristics
  7. Detailed Description
    1. 7.1Overview
    2. 7.2Functional Block Diagram
    3. 7.3Feature Description
      1. 7.3.1Phase Reversal Protection
      2. 7.3.2Output Current Limit
      3. 7.3.3EMI Rejection Ratio (EMIRR)
        1. 7.3.3.1EMIRR IN+ Test Configuration
    4. 7.4Device Functional Modes
      1. 7.4.1Operating Voltage
  8. Application and Implementation
    1. 8.1Application Information
      1. 8.1.1Total Harmonic Distortion Measurements
      2. 8.1.2Source Impedance and Distortion
      3. 8.1.3Capacitive Load and Stability
      4. 8.1.4Power Dissipation and Thermal Protection
      5. 8.1.5Electrical Overstress
    2. 8.2Typical Application
      1. 8.2.1Single-Supply Electret Microphone Preamplifier for Speech
        1. 8.2.1.1Design Requirements
        2. 8.2.1.2Detailed Design Procedure
        3. 8.2.1.3Application Curve
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1Layout Guidelines
    2. 10.2Layout Example
  11. 11Device and Documentation Support
    1. 11.1Device Support
      1. 11.1.1Development Support
        1. 11.1.1.1TINA-TI (Free Software Download)
        2. 11.1.1.2TI Precision Designs
        3. 11.1.1.3WEBENCH® Filter Designer
    2. 11.2Documentation Support
      1. 11.2.1Related Documentation
    3. 11.3Related Links
    4. 11.4Receiving Notification of Documentation Updates
    5. 11.5Community Resources
    6. 11.6Trademarks
    7. 11.7Electrostatic Discharge Caution
    8. 11.8Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • Low Noise: 5.1 nV/√Hz at 1 kHz
  • Ultra-low Distortion: 0.00005% at 1 kHz
  • High Slew Rate: 20 V/μs
  • Unity Gain Stable
  • No Phase Reversal
  • Low Quiescent Current:
    1.8 mA per Channel
  • Rail-to-Rail Output
  • Wide Supply Range: ±2.25 V to ±18 V
  • Single, Dual, and Quad Versions Available

Applications

  • Automotive
  • HEV and EV Power Train
  • Advanced Driver Assist (ADAS)
  • Infotainment Systems
  • In-Cabin Microphones

Description

The OPA1641-Q1 (single) and OPA1642-Q1 (dual) series are JFET-input, ultra-low distortion, low-noise operational amplifiers (op amps) fully specified for audio applications.

The rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Features include 5.1-nV/√Hz noise, low total harmonic distortion + noise (THD+N) (0.00005%), a low input bias current of 2 pA, and low quiescent current of 1.8 mA per channel.

These devices operate over a very wide supply voltage range of ±2.25 V to ±18 V. The OPA164x-Q1 series of operational amplifiers are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions.

The dual version features completely independent circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
OPA1641-Q1SOIC (8)4.90 mm × 3.90 mm
VSSOP (8)3.00 mm × 3.00 mm
OPA1642-Q1SOIC (8)4.90 mm × 3.90 mm
VSSOP (8)3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

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Simplified Internal Schematic

OPA1641-Q1 OPA1642-Q1 pg1_fbd_bos791.gif

Extremely Stable Input Capacitance

OPA1641-Q1 OPA1642-Q1 C304_SBOS484.gif