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TDA7420 数据表(PDF) 4 Page - STMicroelectronics |
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TDA7420 数据表(HTML) 4 Page - STMicroelectronics |
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4 / 29 page ![]() ELECTRICAL CHARACTERISTICS (VS = 8.5V; Tamb =25 °C; RL = 10KΩ; all gains = 0dB; f = 1KHz; unless otherwise specified, refer to the Test Circuit.) Symbol Parameter Test Condition Min. Typ. Max. Unit INPUT SECTION Differential Input Pins 52, 53, 54, 55 RI Input Resistance 37 50 63 K Ω VCL Clipping Level THD = 0.3% 2.0 2.5 Vrms CMRR Common Mode Rejection Ratio 45 55 dB GDIFF Differential Gain -1 0 1 dB Stereo Input Pins 56, 57 RI Input Resistance 75 100 125 K Ω VCL Clipping Level 2.0 2.5 Vrms Quasi Differential Input Pins 58, 59,60 RI Input Resistance 18 25 32 K Ω VCL Clipping Level 2.0 2.5 Vrms Composite Input Pin 61 RI Input Resistance 18 25 32 K Ω VCL Clipping Level 2.0 2.5 Vrms MULTIPLEXER RO Output Resistance (pin 2,3) 100 200 300 Ω GIMIN Minimum Gain -1 0 1 dB GIMAX Maximum Gain 14 15 16 dB GSTEP Step Resolution 0.5 1 1.5 dB VDC Dc Steps Adjacent Gain Step -5 1 5 mV GMIN to GMAX 2mV VOLUME CONTROL RI Input Resistance (1, 64) 24 33 42 K Ω CMAX Max Gain 15 16 17 dB AMAX Max Attenuation 63 dB ASTEPC Step Resolution Coarse Attenuation AV = 16 to -40dB 0.5 1.0 1.5 dB EA Attenuation Set Error G =16 to -40dB -1.5 0 1.5 dB ET Tracking Error 2dB VDC DC Steps Adjacent Attenuation Steps -3 0.1 3 mV from 0dB to AMAX 0.5 5 mV SOFT MUTE AMUTE Mute Attenuation 40 50 dB tD Delay Time CEXT = 22nF; I = IMAX 0 to -20dB; I = IMIN 1.0 ms 23 ms BASS CONTROL CRANGE Control Range +15 +18 +20 dB ASTEP Step Resolution 0.5 1 1.5 dB RB Internal Feedback Resistance 48 65 82 K Ω TDA7420 4/29 |
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