SBOS772A August 2017  – October 2017 INA1650-Q1


  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. 7.3.1Audio Signal Path
      2. 7.3.2Supply Divider
      3. 7.3.3 EMI Rejection
      4. 7.3.4Electrical Overstress
      5. 7.3.5Thermal Shutdown
    4. 7.4Device Functional Modes
      1. 7.4.1Single-Supply Operation
  8. Application and Implementation
    1. 8.1Application Information
      1. 8.1.1Input Common-Mode Range
      2. 8.1.2Common-Mode Input Impedance
      3. 8.1.3Start-Up Time in Single-Supply Applications
      4. 8.1.4Input AC Coupling
      5. 8.1.5Supply Divider Capacitive Loading
    2. 8.2Typical Application
      1. 8.2.1Design Requirements
      2. 8.2.2Detailed Design Procedure
      3. 8.2.3Application Curves
    3. 8.3Other Applications
      1. 8.3.1Two-Channel Microphone Input for Automotive Infotainment Systems
      2. 8.3.2Differential Line Receiver for Single-Supply Applications
      3. 8.3.3Floating Single-Ended Input Line Receiver for Ground Loop Noise Reduction
      4. 8.3.4Floating Single-Ended Input Line Receiver With Differential Outputs
      5. 8.3.5TRS Audio Interface in Single-Supply Applications
      6. 8.3.6Differential Line Driver With Single-Ended Input
  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. (Free Software Download)
        2. Precision Designs
    2. 11.2Documentation Support
      1. 11.2.1Related Documentation
    3. 11.3Receiving Notification of Documentation Updates
    4. 11.4Community Resources
    5. 11.5Trademarks
    6. 11.6Electrostatic Discharge Caution
    7. 11.7Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Orderable Information


  • 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: 2
    • Device CDM ESD Classification: C5
  • High Common-Mode Rejection: 91 dB (Typical)
  • High Input Impedance: 1 MΩ Differential
  • Ultra-Low Noise: –104.7 dBu, unweighted
  • Ultra-Low Total Harmonic Distortion + Noise:
    –119 dB THD+N (20 dBu, 22-kHz Bandwidth)
  • Short-Circuit Protection
  • Integrated EMI Filters
  • Wide Supply Range: ±2.25 V to ±12 V
  • Available in Small 14-Pin TSSOP Package


  • Cabin Microphone Preamplifiers
  • Infotainment Systems
  • Audio Input Circuitry
  • Line Drivers
  • External Audio Power Amplifiers


The INA1650-Q1 SoundPlus™ audio line receiver achieves an extremely high common-mode rejection ratio (CMRR) of 91 dB while maintaining ultra-low THD+N of –119 dB at 1 kHz for 20-dBu signal levels. Unlike other line receiver products, the INA1650-Q1 CMRR is characterized over temperature and tested in production to deliver consistent performance in a wide variety of applications.

The INA1650-Q1 operates over a very-wide-supply range of ±2.25 V to ±12 V, on 10.5 mA of supply current. In addition to the two line-receiver channels, a buffered midsupply reference output is included to allow the INA1650-Q1 to be configured for dual- or single-supply applications. The mid-supply output can be used as a bias voltage for other analog circuitry in the signal chain.

The INA1650-Q1 features a unique internal layout for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded. This device is specified from –40°C to +125°C.

Device Information(1)

INA1650-Q1TSSOP (14) 5.00 mm × 4.40 mm
  1. For all available packages, see the package option addendum at the end of the data sheet.

INA1650-Q1 Simplified Internal Schematic

INA1650-Q1 FBD_01_S001.gif

CMRR Histogram (5746 Channels)

INA1650-Q1 C108_SBOS818.png