參數(shù)資料
型號(hào)： TDA7540N
廠商： STMICROELECTRONICS
元件分類： 調(diào)諧器
英文描述： 2-BAND, AUDIO TUNER, PQFP80
封裝： 14 X 14 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-80
文件頁(yè)數(shù)： 16/76頁(yè)
文件大小： 1225K
代理商： TDA7540N
TDA7540N
Electrical specifications
GAMdelay
AM delay filter attenuation
f = 2.2kHz
2.0
dB
Multipath detector
fCMP
Center frequency of multipath-
bandpass
stereo decoder locked on pilot
tone
19
kHz
GBPMP
Min. band pass gain
MPBPG
4
6
8
dB
GBPMP
Max. band pass gain
MPBPG
10
12
14
dB
GRECTMP
Min. rectifier gain
MPRG
-1
0
1
dB
GRECTMP
Max. rectifier gain
MPRG
4.5
7.6
9.5
dB
ICHMP
Rectifier charge current
MPCC = 0
0.5
0.8
1.2
μA
ICHMP
Rectifier charge current
MPCC = 1
0.2
0.4
0.6
μA
IDISMP
Rectifier discharge current
0.3
0.6
0.8
mA
Quality detector
a
Min. MP influence factor
QDC
0.5
0.6
0.7
aMax. MP influence factor
QDC
0.9
1.05
1.2
A
Min. noise influence factor
QNG
6
dB
A
Max. noise influence factor
QNG
15
dB
1.
Intermodulation Suppression
a2 = VO(signal,@1KHz) / VO(spurious, @1KHz) ; fs = (2x10KHz) - 19KHz
a3 = VO(signal,@1KHz) / VO(spurious, @1KHz) ; fs = (3x13KHz) - 38KHz
measured with: 91% stereo signal; 9% pilot signal; fm = 10kHz or 13kHz.
2.
Traffic Radio (V.F.) Suppression
a57(V,W,F) = VO(signal,@1KHz) / VO(spurious, @1KHz+/-23KHz)
measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% sub carrier (f=57kHz, fm=23Hz AM, m=60%)
3.
SCA ( Subsidiary Communications Authorization )
a67 = VO(signal,@1KHz) / VO(spurious, @9KHz) ; fs = (2x38KHz) - 67KHz
measured with: 81% mono signal; 9% pilot signal; fm=1kHz; 10%SCA – sub carrier ( fS = 67kHz, unmodulated ).
4.
ACI (Adjacent Channel Interference )
a114 = VO(signal,@1KHz) / VO(spurious, @4KHz) ; fs = 110KHz - (3x38KHz)
a190 = VO(signal,@1KHz) / VO(spurious, @4KHz) ; fs = 186KHz - (5x38KHz)
measured with: 90% mono signal; 9% pilot signal; fm=1kHz; 1% spurious signal ( fS = 110kHz or 186kHz, unmodulated).
5.
All thresholds are measured inTestmode at the quality output. The thresholds are calculated by
VNBTH - VPEAK
VPEAK is adjusted by applying a 150kHz sinewave at MPXIN.
Table 8.
Stereodecoder electrical characteristics (continued)
(Tamb = 25°C, VCC1 = VCC2 = VCC3 = VCCST= VCCVCO = VCCMIX1 = VCCMIX2 = VCCIF1 = 8.5V,
VMPX = 500mVrms mono, f = 1kHz, deemphasis = 50s, fXtal = 10.25MHz, in application
circuit, unless otherwise specified).
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
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