U3500BM Datasheet, PDF (7/17 Pages) TEMIC Semiconductors – Cordless Telephone Signal Processor

U3500BM
Parameters
Test Conditions / Pins
Limiter
Output voltage
Increase VCOIN until d = 5%
at TX0 then measure VTX0
Mute
ETX = 0, VCOIN = –l0 dBV
attenuation at TX0 output
Output impedance TXO
Compressor
BSCR EPREE G2TX0 G2TX1
1
0
0
1
G2TX2
0
G2TX3
1
Input impedance
BCOMP = 1
Gain reference level G0TX
Gain change when
compressor is bypassed
VCOIN = –10 dBV_rms
VCOIN = –10 dBV_rms
BCOMP = 1
Gain tracking
Attack time
VCOIN = –30 dBV_rms
VCOIN = –50 dBV_rms
VCOIN = –60 dBV_rms
VCOIN = –70 dBV_rms
³ ^{VCOIN= step}
–30 dBV_rms –18 dBV_rms
measure time after step when
output voltage has 1.5 times
the final value
Release time
³ ^{VCOIN= step}
–18 dBV_rms –30 dBV_rms
measure time after step when
output voltage has 0.75 times
the final value
Scrambler
EPREE BSCR
0
0
BCOMP
1
Conversion gain versus
frequency FIN (1 kHz)
reference level 0 dB
FIN=1kHz, FOUT=3.1kHz
FIN=0.1kHz, FOUT=4.0kHz
FIN=0.3kHz, FOUT=3.8kHz
FIN=0.7kHz, FOUT=3.4kHz
FIN=1.8kHz, FOUT=2.3kHz
FIN=2.6kHz, FOUT=1.5kHz
FIN=3.2kHz, FOUT=0.9kHz
FIN=3.4kHz, FOUT=0.7kHz
Carrier break through
Descrambler
EDEE BSCR
0
0
BCOMP
1
Conversion gain vs.
frequency
FIN=4kHz, FOUT=0.1kHz
FIN=3.8kHz, FOUT=0.3kHz
FIN=3.4kHz, FOUT=0.7kHz
FIN=2.3kHz, FOUT=1.8kHz
FIN=l.5kHz, FOUT=2.6kHz
FIN=0.9kHz, FOUT=3.2kHz
FIN=0.7kHz, FOUT=3.4kHz
Carrier break through
Measure FOUT = 4.099 kHz
Symbol Min.
1.05
56
7
EIX
1
G_0TX
GlTX0
0
9
1
0.5
–11
–21
–22
t_f
t_f
–1.0
–4.4
–2.1
–0.8
–1.1
–1.1
–2.5
–5
–3.6
–1.3
–0.4
–1.5
–0.4
–1.7
–1.9
Typ. Max. Unit Fig.
2.0 Vpp ₉
dB ₉
10
14
kW 9
G1TX1 G1TX2 G1TX3
0
1
0
14
22
kW 9
5.5 10 dB 9
0.5
dB
9
–9
–19
–28
dB
9
–30
3.5
ms
9
14.4
ms
9
0
1.0
–3.4 –2.4
–1.1 –0.1
0.2 1.2
–0.1 0.9
dB ₁₁
–0.1 0.9
–0.5 –0.5
–4
–3
10
20 mV_rms
–2.6 –1.6
–0.3 0.7
0.6 1.6
0.5 0.5 dB 11
0.6 1.6
–0.3 0.7
–0.9 0.1
0.1
0.5 mV_rms
Rev. A3, 20-May-98
7 (17)
Preliminary Information