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GMA7496LS20T bảng dữ liệu(PDF) 5 Page - Gamma Microelectronics Inc. |
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GMA7496LS20T bảng dữ liệu(HTML) 5 Page - Gamma Microelectronics Inc. |
5 / 12 page 5 GMA7496L 2W+2W AMPLIFIER WITH DC VOLUME CONTROL Electrical Characteristics (continued) Refer to the test circuit: VS = 14V, RL = 80Ω, Rg = 50 Ω, TA = 25ºC Parameter Symbol Test Condition Min Typ Max Unit MUTE STAND-BY & INPUT SELECTION FUNCTIONS Stand-by ON Threshold VST ON 3.5 V Stand-by OFF Threshold VST OFF 1.5 V Mute ON Threshold VM ON 3.5 V Mute OFF Threshold VM OFF 1.5 V Quiescent Current @ Stand-by IqST-BY 0.6 1 mA Mute Attenuation AMUTE 50 65 dB Stand by on VST-BY = 5V 80 Stand-by Bias Current IST-BYBIAS Play or Mute -20 -5 µA Mute 1 5 Mute Bias Current ImuteBIAS Play 0.2 2 µA Application Suggestions: The recommended values of the external components are those shown in the application circuit of figure 1. However, different values can be used from the following table of references for further helpr. Component Suggestion Value Purpose Larger than Suggestion Smaller than Suggestion R1 300K Volume control circuit Longer volume regulation time Shorter volume regulation time R2 10K Mute time constant Longer mute on/off time Shorter mute on/off time P1 50K Volume control circuit C1 1000 µF Supply voltage bypass Danger of oscillation C2 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff C3 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff C4 470 µF Ripple rejection Better SVR Worse SVR C5 100nF Volume control time constant Larger volume regulation time Smaller volume regulation time C6 1000 µF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff C7 1 µF Mute time constant Longer mute on/off time Shorter mute on/off time C8 1000 µF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff C9 100nF Supply voltage bypass Danger of oscillation |
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