SBOS818B December   2016  – November 2018 INA1650 , INA1651

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
    1.     INA165x Simplified Internal Schematic
  3. 3 Description
    1.     CMRR Histogram (5746 Channels)
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
    2.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics:
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Audio Signal Path
      2. 7.3.2 Supply Divider
      3. 7.3.3 Electrical Overstress
      4. 7.3.4 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Single-Supply Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Input Common-Mode Range
      2. 8.1.2 Common-Mode Input Impedance
      3. 8.1.3 Start-Up Time in Single-Supply Applications
      4. 8.1.4 Input AC Coupling
      5. 8.1.5 Supply Divider Capacitive Loading
    2. 8.2 Typical Applications
      1. 8.2.1 Line Receiver for Differential Audio Signals in a Split-Supply System
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Differential Line Receiver for Single-Supply Applications
      3. 8.2.3 Floating Single-Ended Input Line Receiver for Ground Loop Noise Reduction
      4. 8.2.4 Floating Single-Ended Input Line Receiver With Differential Outputs
      5. 8.2.5 TRS Audio Interface in Single-Supply Applications
      6. 8.2.6 Differential Line Driver With Single-Ended Input
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
  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 Receiving Notification of Documentation Updates
    5. 11.5 Community Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.1.3 Application Curves

Figure 52 through Figure 57 illustrate the measured performance of the line receiver circuit. Figure 52 shows the measured frequency response. The gain of the circuit is 0 dB as expected with 0.1-dB magnitude variation at 10 Hz. The measured CMRR of the circuit (Figure 53) at 1 kHz equals 94 dB without any source impedance mismatch. Adding a 10-Ω source impedance mismatch degrades the CMRR at 1 kHz to 92 dB. The high-frequency degradation of CMRR shown in Figure 53 for the 10-Ω source impedance mismatch cases is due to the capacitance of the cables used for the measurement. The total harmonic distortion plus noise (THD+N) is plotted over frequency in Figure 54. For a 4-dBu (1.23 VRMS) input signal level, the THD+N remains flat at –101.6 dB (0.0008%) over the measured frequency range. Increasing the signal level to 22 dBu further decreases the THD+N to –115.2 dB (0.00017%) at 1 kHz, but the THD+N rises above 7 kHz. Measuring the THD+N vs Output Amplitude (Figure 55) at 1 kHz shows a constant downward slope until the noise floor of the audio analyzer is reached at 5 VRMS. The constant downward slope indicates that noise from the device dominates THD+N at this frequency instead of distortion harmonics. Figure 56 and Figure 57 confirm this conclusion. For a 4–dBu signal level, the second harmonic is barely visible above the noise floor at –140 dBu. Increasing the signal level to 22 dBu produces distortion harmonics above the noise floor. The largest harmonic in this case is the second at
–111.2 dBu, or –133.2 dB relative to the fundamental.

INA1650 INA1651 ai_C015_SBOS818.png
Figure 52. Frequency Response
INA1650 INA1651 ai_C002_SBOS818.png
1.
90-kHz Measurement Bandwidth
Figure 54. THD+N vs Frequency
INA1650 INA1651 ai_C004_SBOS818.png
1.
4–dBu Output Amplitude
Figure 56. Output Spectrum
INA1650 INA1651 ai_C001_SBOS818.png
1-VRMS Common-Mode Signal
Figure 53. Common-Mode Rejection Ratio vs Frequency
INA1650 INA1651 ai_C014_SBOS818.png
1.
22-kHz Measurement Bandwidth
Figure 55. THD+N vs Amplitude
INA1650 INA1651 ai_C005_SBOS818.png
1.
22–dBu Output Amplitude
Figure 57. Output Spectrum