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TDA7420 Datasheet(PDF) 6 Page - STMicroelectronics

Part # TDA7420
Description  MULTIFUNCTIONAUDIO PROCESSOR
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7420 Datasheet(HTML) 6 Page - STMicroelectronics

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PREAMPLIFIER (VS = 8.5V; Tamb =25
°C; RIN = 600Ω; unless otherwise specified (see test circuit)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
RI
Input Resistance
100
K
Ω
Vout DC
Output Voltage DC (pin 40, 50)
3.2
3.5
3.9
V
RO
Output Resistance (pins 40, 50)
100
200
300
Ω
II
Input Bias Current
10
µA
GVO
Open Loop Gain
f = 400Hz
110
dB
GV
Closed Loop Gain
NAB short
31
32.5
34
dB
RN
Resistance Normal Position
50
250
500
Ω
RMLR
Resistance Metal Position
(left ,right)
2.85
3.8
4.75
K
Ω
RMR
Step Resolution (versus RM)5
%
RMmax
Maximum Value for RM
3.42
4.56
5.7
K
Ω
RMmin
Minimum Value for RM
2.28
3.04
3.8
K
Ω
Dolby Level Control
Control Range
5.5
6.0
6.5
dB
Step Resolution
0.25
0.5
0.75
dB
SR
Slew Rate
NAB Short
1
V/
µs
eN
Total Input Noise
RIN=600
Ω; unweighted
0.8
µV
RIN=600
Ω; CCIR warn
0.5
µV
RIN=0
; unweighted
0.45
µV
Output Attenuation Control
D1, D0 = 00
-0.75
0
0.75
dB
D1, D0 = 01
-20
dB
D1, D0 = 10
-23
dB
D1, D0 = 11
-80
dB
THD
Total Harmonic Distortion
VO = 1V; f = 1KHz metal
0.02
%
VO = 1V; f = 1KHz normal
0.02
0.1
%
VO = 1V; f = 10KHz metal
0.05
%
VO = 1V; f = 10KHz normal
0.04
%
VO = 2V; f = 1KHz
%
SVR1
Ripple Rejection
75
dB
CS
Channel Separation (L to R)
45
60
dB
CCT
Channel Cross talk (F to R)
60
80
dB
S/N
Signal to Noise
VO = 388mV; metal; CCIR arm
65
dB
AUDIO MUSIC SENSOR
IAMSOUT
AMS Output Current
5
mA
VAMSOUT
AMS Output Low Level
IAMOUT = 2mA
500
800
mV
Ri -29
Input Resistance AMS Gain
(pin 23)
75
100
125
K
Ω
VTH1
Interprogram Threshold Voltage
1.2
1.45
1.7
V
VTH2
Interspace Threshold Voltage
4.8
5.2
5.6
V
AMSth
AMS Threshold Level
2.0
2.8
3.6
V
VINTP
INTP Output Voltage
IOUT = 2mA
0.2
0.8
mV
VINTS
INTS Output Voltage
IOUT = 2mA
0.2
0.8
mV
INTP Charge Current
50
70
150
µA
INTS Charge Current
50
70
150
µA
SG
Gain Sensitivity
min Gain V30 vs V29
11
dB
max Gain V30 vs V29
42
dB
Ri-30
AMS Gain Resistance
D6, D5 = 00
13
17.5
22
K
Ω
D6, D5 = 01
16.5
22
27.5
K
Ω
D6, D5 = 11
75
100
125
K
Ω
TDA7420
6/29



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