TEA7540 Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
TEA7540 Datasheet PDF : 12 Pages
| |||
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
PEAK DETECTOR
Rinpd Input impedance
Icr 2
Rise time current
NOISE MEMORIZATION
PIN17
V1 Max voltage drop on PIN 19
ATTENUATOR
Rina Input impedance
PIN25
ATR-
Attenuation= 20lg(Voutr/Vatte) Rpin24 = 11KΩ
Mode: Inactive RX, TX
Rpin24 = 15KΩ
Comp. Max Gain
ATR-active Mode: Active
ATR-IDLE Mode: Noise RX, TX Comp.
Max Gain
Rpin24 = 11KΩ
Rpin24 = 11KΩ
ATTENUATION CONTROL SECTION
VT IME
ITIME
VTIMR
ITIMR
ATRVOL
Tx Mode Att.Voltage
TX Mode Att.Current
RX Mode Att.Voltage
RX Mode Att.Current
Volume Control
MICROPHONE PREAMPLIFIER
Ramp
Gmic
G2off
Imput impedance
Vmic = Voute-Vamp in
Compressor Gain
Monitoring Mode
G2 = Vrecout/Vinr
PIN21
Vcs open
Rext between PINs 2 - 28
Rext = open
Rext = 40KΩ
TEA7540
Min. Typ. Max. Unit Fig.
7.5
10
14.5
KΩ
1
16
20
24
µA
7
33
36
45
mV
8
7.5
10
14.5
KΩ
1
46
dB
9
58
dB
0
1.5
3
dB
10
23
dB
11
190 250 325 mV
12
40
50
70
µA
12
-325 -250 -190 mV
13
40
50
70
µA
13
29
32
35
dB
14
35
50
70
KΩ
19
20
21
dB
36.5
dB
16
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)
7/12
Share Link: 