U3500BM Datasheet PDF - TEMIC Semiconductors
Part Number | U3500BM | |
Description | Cordless Telephone Signal Processor | |
Manufacturers | TEMIC Semiconductors | |
Logo | ||
There is a preview and U3500BM download ( pdf file ) link at the bottom of this page. Total 17 Pages |
Preview 1 page No Preview Available ! Cordless Telephone Signal Processor
U3500BM
Description
The programmable cordless phone signal processor
includes all necessary low frequency parts such as
microphone- and earphone amplifier, compander, pre-
emphasis, deemphasis, scrambler, data management,
power-supply management, as well as RF receiving parts
such as IF converter, FM demodulator. RSSI and low
noise amplifier.
Several gains and mutes in transmit and receive direction
are controlled by serial bus while compander, pre- and
deemphasis and scrambler can be bypassed.
Features
RF Receiver Part
D Low-noise amplifier
D IF converter
D FM demodulator
D RSSI
Low Frequency Part
D Symmetrical input of microphone amplifier
D Symmetrical output of earpiece amplifier
Block Diagram
MIXO IFIN1 IFIN2
D Compander
D Pre- and deemphasis
D Scrambler
D Data management
D Power-supply management
D Serial bus
Application: CT0
DACO
MIXIN
MIXGND
LOIN
LNAIN
RGND
LNAO
VBATT
C
D
IFAMP
LOG
www.DataSheet4U.com
Demodulator
RGAIN
ADJ
LPF
Oscillator
11.15 MHz
LNA
Divider
D/A
LPF
Serial
Bus
Battery low
detector
LPF
Scrambler
frequency
LPF
TGAIN
ADJ.2
Limiter
LPF Deem
Scrambler
frequency
Expander
REC
MIC
Preem
TGAIN
ADJ.1
Compressor
RXO
ETC
EXIN
RECO2
RECO1
MIC1
MIC2
MICO
RXDAT
TXDAT
COIN
VCC TXO
Figure 1. Block diagram
GND
CTC 14678
Rev. A3, 20-May-98
Preliminary Information
1 (17)
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U3500BM
Parameters
RF demodulator
BSCR EDEE
10
Recovered audio
Test Conditions / Pins
Symbol Min. Typ.
fIF = 450 kHz, fMOD = 1 kHz, VIF = 500 m Vrms
GRX0
GRX1
GRX2
GRX3
ERX1
11101
GDEM = 0, D fFM = 2.5 kHz
GDEM = 1, D fFM = 5.0 kHz
0.4 0.8
0.4 0.8
Recovered audio output
voltage drop
VBatt = 3.1 to 5.2 V
–1
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
100 Hz
300 Hz
1800 Hz
3200 Hz
4100 Hz
–0.7 0.3
3.7 4.7
–5.7 –4.7
–10 –9.0
Total harmonic distortion
Audio mute
D FM = 250 Hz
D FM = 2.50 kHz
D FM = 2.5 kHz, ERXO = 0
ERX1 = 0, ERX2 = 0
65
Output impedance
Expander
EEA
GEA0
GEA1
GEA2
GEA3
10001
Gain reference level
Change of gain when
expander is bypassed
VEXIN = –10 dBVrms
BCOMP = 1
GOREC 11
–0.5
13
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
voltage
VBatt = 3.1 to 5.2 V
–0.5
Attack time
³VEXIN = step
–20 dBVrms –14 dBVrms,
measure time after step, when
output voltage has 0.75 times
the final value
tf
16
Release time
VEXIN = step
³14 dBVrms –20 dBVrms,
measure time after step, when
output voltage has 1.5 times of
the final value
tf
16
Max. Unit Fig.
ERXO
1
1.6
1.6
+1
ERX2
1
Vpp
Vpp
6
dB 6
dB 6
0.5 dB
17 dB
1.2 dB
–5.5
0
0.7 dB
1.2
–60
1.3
5.7
–3.7 dB
–8.0
–66
3.5 %
3.5 %
dB
100
GEA4
1
15
0.5
W
dB
dB
–19
–39 dB
–47
14.5 kW
0.5 dB
ms
6
6
6
6
6
6
6
7
7
7
7
7
7
ms
7
Rev. A3, 20-May-98
Preliminary Information
5 (17)
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for U3500BM electronic component. |
Information | Total 17 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ U3500BM.PDF Datasheet ] |
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