U3750BM Datasheet, PDF (5/20 Pages) TEMIC Semiconductors – One Chip Telephone Circuit

TELEFUNKEN Semiconductors
Thermal Resistance
Junction ambient
Parameters
Symbol
R_thJA
U3750BM
Value
Unit
70
K/W
Electrical Characteristics
W f = 1 kHz, f_clock = 455 kHz, R_E = 20 k , T_amb = 25°C,
unless otherwise specified, Q (Resonance factor) = 3100,
W L₁ = 6.1 mH, C₁ = 21 pF, C_O = 268.5 pF, R₁ = 5.5 . All
resistances are specified at 1%, all capacitance at 2%.
Parameters
Test Conditions / Pins Symbol Min.
Typ.
Max.
Unit
Line voltage normal
Line voltage operation
I_L = 8 mA
I_L = 15 mA
I_L = 28 mA
I_L = 60 mA
figure 3
V_L
2.9
3.6
V
4.1
4.5
4.9
6.4
7.3
12.3
13.7
Stabilized voltage
w^{IL = 8 mA, ICC = 0.6 mA}
I_L 28 mA, I_CC = 2.1 mA
V_CC
2.0
3.3
2.5
3.5
3.7
V
figure 3
Transmission
Sending gain
AGC
V_MI = 2 mV_RMS (note 1)
I_L = 28 mA (G_S max)
G_S
47
48
49
dB
I_L = 60 mA (G_S min)
I_L = 28 to 60 mA
39.5
41
42.5
DG_S
–6
–7
–8
figure 3
Psophometric sending noise V_MI = 0, I_L = 28 mA
figure 3
–73
–68 dBmp
Attenuation gain during
V_MI = 2 mV_RMS,
A_S
63
dB
dialing
I_L = 28 mA
figure 3
Microphone input
figure 3
70
120
kW
impedance (Pins 22–23)
Common mode rejection I_L = 28 mA
CMRR
80
dB
ratio
figure 3
From transmission to
dialing mode
I_L = 28 to 60 mA
figure 3, Pin 25
Step
–100
+100
mV
Dynamic limiter
(anticlipping)
Output voltage swing
(peak-to-peak value)
Overdrive dynamic range
Line distortion (on 600 W)
w ^{CRILAA=CCLL20==m64.7A80MnFW,}
I_L 28 mA,
V_MI = 8 mV_RMS
w ^{figure 3}
I_L 28 mA
w ^{figure 3}
I_L 28 mA
V_MI = 4.6 mV_RMS
V_MI = 8 mV_RMS
V_MI = 80 mV_RMS
figure 3
2.5
V_pp
3.0
3.6
4.2
5
dB
3
5
%
5
Rev. A1: 16.07.1996
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