U3500BM Просмотр технического описания (PDF) - Temic Semiconductors
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U3500BM Datasheet PDF : 17 Pages
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U3500BM
Parameters
RF demodulator
BSCR EDEE
1
0
Recovered audio
Test Conditions / Pins
Symbol Min. Typ.
fIF = 450 kHz, fMOD = 1 kHz, VIF = 500 mVrms
GRX0
GRX1
GRX2
GRX3
ERX1
1
1
1
GDEM = 0, DfFM = 2.5 kHz
GDEM = 1, DfFM = 5.0 kHz
0
1
0.4 0.8
0.4 0.8
Recovered audio output
VBatt = 3.1 to 5.2 V
–1
voltage drop
AM rejection ratio
30% AM
30
35
RX audio
Change of RX0 signal
deemphasis bypass
EDEE = 0
–0.5 0
Gain adjust range
12
15
Gain adjust step
0.8
1
Output signal vs. frequency
relative to 1 kHz (0 dB)
deemphasis bypassed
100 Hz
300 Hz
1800 Hz
3200 Hz
4100 Hz
–7.5 –6.5
–2.0 –1.0
–1.3 –0.3
–0.8 0.2
Output signal vs. frequency
relative to 1 kHz (0 dB)
deemphasis enable
EDEE = 1
Total harmonic distortion
Audio mute
100 Hz
300 Hz
1800 Hz
3200 Hz
4100 Hz
DFM = 250 Hz
DFM = 2.50 kHz
DFM = 2.5 kHz, ERXO = 0
ERX1 = 0, ERX2 = 0
–0.7 0.3
3.7 4.7
–5.7 –4.7
–10 –9.0
65
Output impedance
Expander
EEA
GEA0
GEA1
GEA2
GEA3
1
0
0
0
1
Gain reference level
Change of gain when
expander is bypassed
VEXIN = –10 dBVrms
BCOMP = 1
GOREC 11
13
–0.5
Gain tracking
Input impedance
VEXIN = –20 dBVrms
VEXIN = –30 dBVrms
VEXIN = –35 dBVrms
VEXIN = –40 dBVrms
–21
–41
–53 –50
–60
9.5
Gain change vs. supply
VBatt = 3.1 to 5.2 V
–0.5
voltage
Attack time
³ VEXIN = step
–20 dBVrms –14 dBVrms,
tf
16
measure time after step, when
output voltage has 0.75 times
the final value
Release time
³ VEXIN = step
14 dBVrms –20 dBVrms,
tf
16
measure time after step, when
output voltage has 1.5 times of
the final value
Max. Unit Fig.
ERXO
1
1.6
1.6
+1
ERX2
1
Vpp
Vpp
6
dB 6
dB 6
0.5
dB
6
17 dB 6
1.2 dB 6
–5.5
0
0.7 dB 6
1.2
–60
1.3
5.7
–3.7 dB 6
–8.0
–66
3.5
3.5
%
%
6
dB 6
100 W
GEA4
1
15 dB 7
0.5
dB
7
–19
–39
–47
dB
7
14.5 kW 7
0.5
dB
7
ms
7
ms
7
Rev. A3, 20-May-98
5 (17)
Preliminary Information
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