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参数资料
| 型号： | TDA7420 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | 14 X 14 MM, TQFP-64 |
| 文件页数： | 26/29页 |
| 文件大小： | 230K |
| 代理商： | TDA7420 |
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PREAMPLIFIER (VS = 8.5V; Tamb =25
°C; RIN = 600; unless otherwise specified (see test circuit)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
RI
Input Resistance
100
K
Vout DC
Output Voltage DC (pin 40, 50)
3.2
3.5
3.9
V
RO
Output Resistance (pins 40, 50)
100
200
300
II
Input Bias Current
10
A
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
RMLR
Resistance Metal Position
(left ,right)
2.85
3.8
4.75
K
RMR
Step Resolution (versus RM)5
%
RMmax
Maximum Value for RM
3.42
4.56
5.7
K
RMmin
Minimum Value for RM
2.28
3.04
3.8
K
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/
s
eN
Total Input Noise
RIN=600
; unweighted
0.8
V
RIN=600
; CCIR warn
0.5
V
RIN=0
; unweighted
0.45
V
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
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
A
INTS Charge Current
50
70
150
A
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
D6, D5 = 01
16.5
22
27.5
K
D6, D5 = 11
75
100
125
K
TDA7420
6/29
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