U3550BM Datasheet, PDF (11/25 Pages) TEMIC Semiconductors – Low-Power FM Transmitter / Synthesizer System 26 to 50 MHz

U3550BM
Parameters
Third order input intercept point
Image-frequency rejection
Test Conditions / Pins
M1CP = 0
W ^{M1CP = 1}
50- input impedance
FRF1 = 41.4 MHz
FRF2 = 41.4125 MHz
Input level 1 = –30 dBm
Input level 2 = –30 dBm
Fb8: f_LO = 30.7 MHz
UDM1 = 0
FRF11 = 41.4 MHz
FRF12 = 20 MHz (image)
Symbol
Min.
Typ.
Max.
Unit
–7
–5
dBm
–4
–2
dBm
20
dB
Fb8: f_LO = 30.7 MHz
UDM1 = 0
FRF21 = 20 MHz
FRF22 = 41.4 MHz (image)
LO to RF MIXIN input isolation
LO to IF MIXO output isolation
Isolation transmit path to receive
path (crosstalk)
Logical part
Inputs: C, D
Low-voltage input
High-voltage input
Inputs: C, D, MCKA
Input leakage current
(0 < VI < VCC)
Input leakage current Pin XCK
(0 < VI < VCC)
Output impedance at MCKO
Serial bus (figure 8)
Data set-up rime
Data hold time
Clock low time
Clock high time
Hold time before transfer
condition
Data low pulse on transfer
condition
Data high pulse on transfer
condition
Fb8: f_LO = 57.67 MHz
UDM1 = 1
FRF31 = 46.97 MHz
FRF32 = 68.37
Fb8: measuring, f_LO = 30.7 MHz
Fb8: measuring, f_LO = 30.7 MHz
Synthesizer programming
as ‘Taiwan channel 5’ (see page 21),
Dtransmitter modulation (Pin 25) for
f = 3 kHz, f_mod = 300 to 3400 kHz,
M1CP = 1,
W ^{fRF (Pin 10) = 45.35 or 48.35 MHz}
unmodulated, –25 dBm (50 ) measuring
frequency modulation of the 10.7 MHz
signal at MIXO (Pin 12)
(1) I_S = I_VBAT + I_VCC + I_MIXVB + I_RFOVB
(3)
+ O_DELVB + I1OSCVDD
(4)
(2) 1-measure 11.15 MHz at MCKO pin
2-measure FRFO at RFO pin
0.2
mV_rms
1.2
mV_rms
28
dB
V_il
V_ih
0.8 V_CC
V_i
–1
–5
0.5
t_sud
0.1
t_hd
0
t_cl
2
t_ch
2
t_eon
0.1
t_eh
0.2
t_eoff
0.2
0.2 V_CC
1
mA
5
mA
1.0
kW
mmmmmsssss
ms
ms
See country channels
Ratio between demodulated audio level with and
without 1-kHz modulation
Rev. A2, 10-Sep-98
Preliminary Information
11 (25)