TDA7512 데이터 시트보기 (PDF) - STMicroelectronics
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TDA7512 Datasheet PDF : 42 Pages
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TDA7512
Table 3. ELECTRICAL CHARACTERISTICS (continued)
Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCIF1=8.5V, fRF = 98MHz, dev. = 40kHz,
fMOD = 1kHz, fIF1 = 10.7MHz, fIF2 = 450KHz, fXtal = 10.25MHz, in application circuit, unless otherwise
specified.
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
V60 Lower threshold start with KAGC KAGC = max, V7-9 = 0mVRMS,
∆fIF=300KHz
V35 Startpoint KAGC
KAGC = max, V7-9 = 0mVRMS,
∆fIF=300KHz
fIF1 generate FSW level at V35
∆
Control range KAGC
∆V35= +0.4V
RIN Input resistance
CIN Input capacitance
AGC Time Constant Output
98
dBµV
3.6
V
16
dB
10
kΩ
2.5
pF
V10 Max. AGC output voltage
V10 Min. AGC output voltage
I10 Min. AGC charge current
I10 Max. AGC discharge current
AGC PIN Diode Driver Output
I6
AGC OUT, current min.
I6
AGC OUT, current max.
I/Q Mixer1 (10.7MHz)
V7-9 = 0mVRMS
V7-9 = 50mVRMS
V7-9 = 0mVRMS,V10 = 2.5V
V7-9 = 50mVRMS,V10 = 2.5V
V7-9 = 0mVRMS, V6 = 2.5V
V7-9 = 50 mVRMS, V6 = 2.5V
VREF1
V
+VBE
0.5
V
-12.5
µA
1.25
mA
50
µA
-20
mA
RIN Input resistance
CIN Input capacitance
ROUT Output resistance
V7,9 Input dc bias
gm Conversion transconductance
F
Noise figure
CP1dB 1dB compression point
IIP3 3rd order intermodulation
differential
differential
differential
400Ω generator resistance
referred to diff. mixer input
10
4
100
3.2
17
3
100
122
kΩ
pF
kΩ
V
mS
dB
dBµV
dBµV
IQG I/Q gain adjust
G
-1
+1
%
IQP I/Q phase adjust
PH
-7
+8 DEG
IRR Image rejection ratio
ratio wanted/image
30
40
dB
IRR Image rejection ratio
with gain and phase adjust
40
46
dB
7/42
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