JAJSDR4C August   2017  – May 2019 INA1650-Q1 , INA1651-Q1

PRODUCTION DATA.  

  1. 特長
  2. アプリケーション
    1.     簡略化された内部回路図
  3. 概要
    1.     CMRRヒストグラム(5746チャネル)
  4. 改訂履歴
  5. Pin Configuration and Functions
    1.     Pin Functions: INA1650-Q1
    2.     Pin Functions: INA1651-Q1
  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. 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 EMI Rejection
      4. 7.3.4 Electrical Overstress
      5. 7.3.5 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Single-Supply Operation
  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 Two-Channel Microphone Input for Automotive Infotainment Systems
      3. 8.2.3 TRS Audio Interface in Single-Supply Applications
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 デバイス・サポート
      1. 11.1.1 開発サポート
        1. 11.1.1.1 TINA-TI(無料のダウンロード・ソフトウェア)
        2. 11.1.1.2 TI Precision Designs
    2. 11.2 ドキュメントのサポート
      1. 11.2.1 関連資料
    3. 11.3 ドキュメントの更新通知を受け取る方法
    4. 11.4 コミュニティ・リソース
    5. 11.5 商標
    6. 11.6 静電気放電に関する注意事項
    7. 11.7 Glossary
  12. 12メカニカル、パッケージ、および注文情報

Application Curves

Figure 54 through Figure 59 illustrate the measured performance of the line receiver circuit. Figure 54 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 55) 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 55 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 56. 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 20 dBu further decreases the THD+N to –113.2 dB (0.00022%) at 1 kHz, but the THD+N rises to greater than 7 kHz. Measuring the THD+N vs output amplitude (Figure 57) 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 58 and Figure 59 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 20 dBu produces distortion harmonics above the noise floor. The largest harmonic in this case is the second at
–111.2 dBu, or –131.2 dB relative to the fundamental.

INA1650-Q1 INA1651-Q1 ai_C015_SBOS818.png
Figure 54. Frequency Response
INA1650-Q1 INA1651-Q1 new_ai_C002_SBOS772.png
90-kHz Measurement Bandwidth
Figure 56. THD+N vs Frequency
INA1650-Q1 INA1651-Q1 ai_C004_SBOS818.png
4–dBu Output Amplitude
Figure 58. Output Spectrum
INA1650-Q1 INA1651-Q1 ai_C001_SBOS818.png
1-VRMS Common-Mode Signal
Figure 55. Common-Mode Rejection Ratio vs Frequency
INA1650-Q1 INA1651-Q1 new_ai_C014_SBOS772.png
22-kHz Measurement Bandwidth
Figure 57. THD+N vs Amplitude
INA1650-Q1 INA1651-Q1 new_ai_C005_SBOS772.png
20–dBu Output Amplitude
Figure 59. Output Spectrum