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| U4050B Datasheet, PDF (6/18 Pages) TEMIC Semiconductors – Speech Circuit with Line-Powered Loudspeaker Amplifier | |||
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U4050B
Parameters
Test Conditions / Pins Symbol Min.
Speaker amplifier
see figure 7
Minimum line
current for operation
Gain from VL to SAO
Output power
Output noise
Gain devitation
Gain change with current
Resistor for turning off
speaker amplifier
No ac signal
w IL 15 mA
Vgen = 10 mV
Load resistance
RL = 50 â¦
d<5%
Vgen = 300 mVrms
IL > 15 mA
IL = 20 mA
IL > 15 mA
(Input GSA open)
IL = 15 mA
Tamb = â10 to + 60°C
IL = 15 to 100 mA
RAGA = 7.5 kâ¦
IL = 15 to 100 mA
ILmin
10.5
GSA
27.5
PSA
5
PSA
nsa
DGSA
DGSA
RGSA
0.8
Maximum off-state
Output voltage
Gain change
with frequency
IL = 15 mA
VL = 0 dBm
Pin GSA open
IL = 15 mA
f = 300 to 3400 Hz
VSAO
DGSA
Attack time
20 dB overdrive
tr
Release time
tf
Distortion
DTMF - amplifier
IL = 15 mA
Vgen = 300 mV
see figure 8
dSAO
Test conditions: ID = 2 mA, IM = 0.3 mA, RAGA = 7.5 kâ¦, mute active
Adjustment range of DTMF IL = 15 mA
gain
Load = 600 â¦
GD
18
DTMF amplification
Gain deviation
Input resistance
Distortion of
DTMF signal
Gain deviation
with current
IL = 15 mA
IL = 15 mA
Tamb = â 10 to 60°C
w IL 15 mA
VI = 0 dBm
IL = 15 to 100 mA
RAGA = 7.5 kâ¦
GD
24.5
GD
Ri
20
d
DGD
Typ.
Max.
Unit
15
mA
29
30.5
dB
mW
20
200
µV
"1
dB
"1.5
dB
1.3
2
MW
â 50
dBm
"1
dB
1
ms
300
ms
5
%
26
34
dB
26
"27
0.5
dB
dB
25
30
kâ¦
2
%
" 0.5
dB
6 (18)
Rev. A2, 05-Mar-98
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