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TEA7540FP Fiches technique(PDF) 7 Page - STMicroelectronics |
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TEA7540FP Fiches technique(HTML) 7 Page - STMicroelectronics |
7 / 12 page ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition Min. Typ. Max. Unit Fig. PEAK DETECTOR Rinpd Input impedance PIN17 7.5 10 14.5 K Ω 1 Icr2 Rise time current 16 20 24 µA7 NOISE MEMORIZATION V1 Max voltage drop on PIN 19 33 36 45 mV 8 ATTENUATOR Rina Input impedance PIN25 7.5 10 14.5 K Ω 1 ATR- Attenuation= 20lg(Voutr/Vatte) Mode: Inactive RX, TX Comp. Max Gain Rpin24 = 11K Ω Rpin24 = 15K Ω 46 58 dB dB 9 ATR-active Mode: Active Rpin24 = 11K Ω 0 1.5 3 dB 10 ATR-IDLE Mode: Noise RX, TX Comp. Max Gain Rpin24 = 11K Ω 23 dB 11 ATTENUATION CONTROL SECTION VTIME Tx Mode Att.Voltage 190 250 325 mV 12 ITIME TX Mode Att.Current 40 50 70 µA12 VTIMR RX Mode Att.Voltage -325 -250 -190 mV 13 ITIMR RX Mode Att.Current 40 50 70 µA13 ATRVOL Volume Control 29 32 35 dB 14 MICROPHONE PREAMPLIFIER Ramp Imput impedance PIN21 35 50 70 K Ω Gmic Vmic = Voute-Vamp in Vcs open 19 20 21 dB G2off Compressor Gain Monitoring Mode G2 = Vrecout/Vinr Rext between PINs 2 - 28 Rext = open Rext = 40K Ω 36.5 16 dB dB Figure 1: Basic Configuration Figure 2: Test Configuration V + =3V pin 7 is forced to transmit mode pin 11 is forced to max gain Input signal on pin 13 VINE = 1.5mVpp output voltage VMICOUT measured on pin 12 G1max = 20log (VMICOUT / VINE) TEA7540 7/12 |
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Description similaire - TEA7540FP |
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