TDA7511 データシートの表示（PDF） - STMicroelectronics
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TDA7511 Datasheet PDF : 41 Pages
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TDA7511
ELECTRICAL CHARACTERISTCS (continued)
Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = 8.5V, fRF = 98MHz, dev. = 40kHz,
fMOD = 1kHz, fIF1 = 10.7MHz, fIF2 = 450KHz, fXtal = 10.25MHz, in test or application circuit, unless otherwise
specified.
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
DEVWTH Internal low threshold
DWTH
30
kHz
DEVWTH Internal high threshold
DWTH
75
kHz
RATIOmi Referred to threshold
DTH
1
n
RATIOm Referred to threshold
DTH
1.5
ax
Softmute
VANT Upper startpoint
SMTH, SMD, SLOPE = 0
16
dBµV
VANT lower startpoint
SMTH, SMD, SLOPE = 0
3
dBµV
aSMmin Min. softmute depth
SMD, SLOPE = 0, SMTHUpper
18
dB
aSMmax Max. softmute depth
SMD, SLOPE = 0, SMTHUpper
36
dB
aSMTHIS Mute depth threshold for ISS filter SMCTH
S
on
0.2
2
dB
VACTH Internal AC mute threshold
ACM
60
220 mV
aSMAC AC mute depth
6
dB
I42 Charge current
-47.5
µA
I42 Discharge current
2.5
µA
S/N Over All
S/N
VIN_min = 60dBµV,
66
dB
dev.= 40kHz,LP=15KHz
deemphasis t = 50µs
ELECTRICAL CHARACTERISTICS
Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCMIX2 = 8.5V, fRF = 1MHz, fMOD = 400Hz at 30%
AMfIF1 = 10.7MHz, fIF2 = 450kHz, fxtal = 10.25MHz, in test or application circuit, (unless otherwise noted, VinRF
antenna input).
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
AM SECTION
Global
VINRF Max. sensitivity
min
Ref.: VINRF = 74dBµV,
∆V37 = -10dB
19
dBµV
VINRF us Usable sensitivity
(S+N)/N = 20 dB
30
26
dBµV
∆VINRF AGC Range
Ref.: VINRF = 74dBµV,
51
dB
∆V37 = -10dB
(S+N)/N Signal to Noise Ratio
Ref.: VINRF = 74dBµV
49
56
dB
10/41
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