U4030B Datasheet, PDF (7/14 Pages) TEMIC Semiconductors – Telephone Speech Circuit

Electrical Characteristics
f = 1000 Hz, T_amb = 25_C, reference point Pin 14, unless otherwise specified
Parameters
Test Conditions / Pins Symbol Min.
DC characteristics (figure 9)
DC voltage in speech mode I_L = 19 mA
V_L
6.2
I_L = 26 mA
I_L = 60 mA
10.0
Transmit amplifier and sidetone reduction (figure 10)
Input resistance
R_I
45.0
Transmit gain
Gain variation
Noise at line,
x x ^{IL = 24 mA}
19 mA I_L 60 mA
G_T
DG_T
44.2
– 0.5
R_L = 600 W
nO
psophometrically weighted Z_RECO = 68 nF
Z_MIC = 68 nF
I_L = 19 to 60 mA
Sidetone gain (figure 10)
Max. output voltage
R R_L →
xd 5%
G_ST
V_Omax
V_MIC = 5.4 mV
Common mode rejection
CMRR
ratio
Mute: reduction of
Z_RECO = 68 nF
60.0
voltage amplification
Privacy: reduction of
60.0
voltage amplification
Receiving amplifier (figure 11)
Gain
Gain variation
Noise at earphone
psophometrically weighted
Max. output voltage
Z_{RECO =} 68 nF
x x ^{IL = 24 mA}
19 mA I_L 60 mA
I_L = 19 to
Load T, R
60 mA
= 600 W
Z_RECO = 68 nF
Z_MIC = 68 nF
I_L = 19 to 60 mA
x^{ZRECO = 68 nF}
d 2%
G_R
– 3.9
DG_R
– 0.5
n_I
V_Omax
600
Switching threshold of ear I_L = 19 to 60 mA
0.7
protection
Z_RECO = 68 nF
VGEN = 3 Vrms
Voltage amp. from
Zear = 68 nF
–7
DTMF to RECO
Output impedance
Power down (figure 12)
PD-off input voltage
PD-on input voltage
Input current
Line voltage
Input current consumption
at V_D
V_I = 6 V
PD on, I_L = 24 mA
PD on
V_I
V_I
2
I_I
V_L
I_D
U4030B
Typ. Max. Unit
6.5
6.8
V
7.2
V
10.5
11.0
V
60.0
80.0
kW
44.7
45.2
dB
+ 0.5
dB
– 75.0 dBmp
33.5
dB
5.5
6.3
dBm
80.0
dB
dB
dB
– 3.4
– 2.9
dB
0.5
dB
– 78 dBmp
650
mVrms
1.3
Vrms
–4
–1
dB
10
W
0.3
V
V
130
mA
1.5
V
100
mA
Rev. A2, 27-Jan-98
7 (14)