参数资料
型号: TDA7412
厂商: STMICROELECTRONICS
元件分类: 音频控制
英文描述: 1 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44
封装: 10 X 10 MM, 1.40 MM HEIGHT, TQFP-44
文件页数: 16/56页
文件大小: 716K
代理商: TDA7412
23/56
TDA7412
2.2 ELECTRICAL CHARACTERISTICS
VS = 9V, deemphasis time constant = 50s, MPX input voltage VMPX = 500mV (75kHz deviation), modulation
frequency = 1kHz, input gain = 6dB, Tamb = 27°C, unless otherwise specified.
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Vin
MPX Input Level
Input Gain = 3.5dB
0.5
1.25
Vrms
Rin
Input Resistance
70
100
130
k
Gmin
Min. Input Gain
1.5
3.5
4.5
dB
Gmax
Max. Input Gain
8.5
11
12.5
dB
Gstep
Step Resolution
1.75
2.5
3.25
dB
SVRR
Supply Voltage Ripple Rejection
Vripple = 100mV, f = 1kHz
55
dB
a
Max. Channel Separation
30
50
dB
THD
Total Harmonic Distortion
fin=1kHz, mono
0.02
0.3
%
Signal plus Noise to Noise Ratio
A-weighted, S = 2Vrms
80
91
dB
MONO/STEREO-SWITCH
VPTHST1 Pilot Threshold Voltage
for Stereo, PTH = 1
10
15
25
mV
VPTHST0 Pilot Threshold Voltage
for Stereo, PTH = 0
15
25
35
mV
VPTHMO1 Pilot Threshold Voltage
for Mono, PTH = 1
7
12
17
mV
VPTHMO0 Pilot Threshold Voltage
for Mono, PTH = 0
10
19
25
mV
PLL
f/f
Capture Range
0.5
%
DEEMPHASIS and HIGHCUT
τDeempFM Deemphasis Timeconstants FM
VLEVEL >> VHCH
25
50
75
s
VLEVEL >> VHCH
44
62.5
80
s
VLEVEL >> VHCH
50
75
100
s
VLEVEL >> VHCH
70
100
130
s
MFM
Highcut Timeconstant Multiplier FM VLEVEL << VHCL
3
τDeempAM Deemphasis Timeconstants AM
VLEVEL >> VHCH
37.5
s
VLEVEL >> VHCH
47
s
VLEVEL >> VHCH
56
s
VLEVEL >> VHCH
75
s
MAM
Highcut Timeconstant Multiplier AM VLEVEL << VHCL
3.7
REF5V
Internal Reference Voltage
4.7
5
5.3
V
N
S+N
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