U3550BM Datasheet, PDF (10/25 Pages) TEMIC Semiconductors – Low-Power FM Transmitter / Synthesizer System 26 to 50 MHz

U3550BM
Parameters
Spurious at RFO output
(delta versus carrier)
VTX output capability
VTX output leakage current
PLLs
Charge-pump output voltage
Precharge voltage at the loop
filter
Charge-pump output current in
speed-up mode
Charge-pump output current
Charge-pump leakage current
VCO1 gain
Receiver input mixer (Mixer 1)
Input frequency range
Output frequency
Input resistance
Input capacitor
Output impedance
Voltage gain on MIXO
Noise figure
Input compression point
Test Conditions / Pins
a/ Fb6: f_RFO = 26.375 MHz
b/ US1h9:_DFf_{R=FO±2=.54k9H.9z9} MHz (3)
Df = ±12.5 kHz
Df = ±557.5 kHz
Df =
Df
±1/2 f_mod
= ± f_mod
for V_S = 3.1 to 5.2 V
DV
I_LOAD = 3 mA
with and without
load
ETXO = 0; current to GND
V_S = 3.1 to 5.2 V
EVCO1 =1, output high
EVCO3 = 1
EVCO1 = 0
EVCO1 = 1
V_MLF = 1.25 V, output high
V_MLF = 1.25 V, output low
V_MLF = 1.25 V, output high
V_MLF = 1.25 V, output tristate
V_MLF = 0 V, then 2.5 V
EVCO3 = 1
M1CP = 0
M1CP = 1
M1CP = 0
M1CP = 1
for:
Fb8: f_LO = 30.7 MHz
FRF11 = 20 MHz
UDM1 = 1
Fb8: f_LO = 30.7 MHz
FRF21 = 41.4 MHz
UDM1 = 0
US1h10: f_LO = 57.67 MHz
FRF31 = 46.97 MHz
UDM1 = 1
for V_S = 3.1 to 5.2 V
BW = 1 MHz
50-W input impedance
M1CP = 0
M1CP = 1
50-W input impedance
Symbol
Min.
Typ.
Max.
Unit
60
dBc
0.5
V
1
mA
2.38
2.5
2.63
V
1.15
1.4
1.65
V
–400
–300
–200
mA
4.3
6.2
8
mA
–8
–6.2
–4.3
mA
–100
+100
nA
121
140
156
kHz/V
20
50
MHz
10.7
MHz
2.4
3.0
3.6
kW
3
3.5
4
pF
210
330
390
W
50
80
110
W
9.5
12.5
15.5
dB
14
17
20
dB
14
18
dB
–19
–17.7
dBm
–16
–14.3
dBm
10 (25)
Preliminary Information
Rev. A2, 10-Sep-98