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U3550BM-AFLG3 Datasheet(PDF) 10 Page - TEMIC Semiconductors

Part # U3550BM-AFLG3
Description  Low-Power FM Transmitter / Synthesizer System 26 to 50 MHz
Download  25 Pages
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Manufacturer  TEMIC [TEMIC Semiconductors]
Direct Link  http://www.temic.de
Logo TEMIC - TEMIC Semiconductors

U3550BM-AFLG3 Datasheet(HTML) 10 Page - TEMIC Semiconductors

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U3550BM
Rev. A2, 10-Sep-98
Preliminary Information
10 (25)
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Spurious at RFO output
(delta versus carrier)
a/ Fb6: fRFO = 26.375 MHz
b/ US1h9: FRFO = 49.99 MHz (3)
Df = ±2.5 kHz
Df = ±12.5 kHz
Df = ±557.5 kHz
Df = ±1/2 fmod
Df = ± fmod
for VS = 3.1 to 5.2 V
60
dBc
VTX output capability
ILOAD = 3 mA
DV with and without load
0.5
V
VTX output leakage current
ETXO = 0; current to GND
1
mA
PLLs
VS = 3.1 to 5.2 V
Charge-pump output voltage
EVCO1 =1, output high
2.38
2.5
2.63
V
Precharge voltage at the loop
filter
EVCO3 = 1
EVCO1 = 0
1.15
1.4
1.65
V
Charge-pump output current in
speed-up mode
EVCO1 = 1
VMLF = 1.25 V, output high
–400
–300
–200
mA
Charge-pump output current
VMLF = 1.25 V, output low
4.3
6.2
8
mA
gp
p
p
VMLF = 1.25 V, output high
–8
–6.2
–4.3
mA
Charge-pump leakage current
VMLF = 1.25 V, output tristate
–100
+100
nA
VCO1 gain
VMLF = 0 V, then 2.5 V
121
140
156
kHz/V
Receiver input mixer (Mixer 1)
Input frequency range
EVCO3 = 1
20
50
MHz
Output frequency
10.7
MHz
Input resistance
2.4
3.0
3.6
k
W
Input capacitor
3
3.5
4
pF
Output impedance
M1CP = 0
M1CP = 1
210
50
330
80
390
110
W
W
Voltage gain on MIXO
M1CP = 0
M1CP = 1
for:
Fb8: fLO = 30.7 MHz
FRF11 = 20 MHz
UDM1 = 1
Fb8: fLO = 30.7 MHz
FRF21 = 41.4 MHz
UDM1 = 0
US1h10: fLO = 57.67 MHz
FRF31 = 46.97 MHz
UDM1 = 1
for VS = 3.1 to 5.2 V
9.5
14
12.5
17
15.5
20
dB
dB
Noise figure
BW = 1 MHz
50-
W input impedance
14
18
dB
Input compression point
M1CP = 0
M1CP = 1
50-
W input impedance
–19
–16
–17.7
–14.3
dBm
dBm


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