TEA1068T Philips Semiconductors, TEA1068T Datasheet - Page 11

• Manufacturer Part Number: TEA1068T
• Description: Versatile telephone transmission circuit with dialler interface
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1996 Apr 23
Transmitting amplifier output LN
V
V
Receiving amplifier input IR
Receiving amplifier outputs QR+ and QR
G
V
V
Gain adjustment GAR
SYMBOL
Z
Z
G
G
G
LN(rms)
no(rms)
o(rms)
no(rms)
Versatile telephone transmission circuit
with dialler interface
v
i
o
vf
vT
v
output voltage (RMS value)
noise output voltage (RMS value)
input impedance
output impedance
voltage gain from IR to QR+ or
QR
gain variation with frequency at
f = 300 Hz and f = 3400 Hz
gain variation with temperature at
T
output voltage (RMS value)
noise output voltage (RMS value)
gain variation of receiving amplifier
achievable by varying R4 between
GAR and QR
amb
25 C and +75 C
PARAMETER
I
I
200
MIC+; psophometrically
weighted (P53 curve)
single ended
I
with respect to 800 Hz
I
with respect to 25 C;
without R6
sine wave drive; I
I
R4 = 100 k
I
IR open-circuit
psophometrically weighted
(P53 curve)
line
line
line
line
p
line
= 0 mA; THD = 2%;
THD = 2%
THD = 10%
R
QR ) = 300 ; single-ended
R
QR ) = 600 ; differential
single-ended; R
single-ended; R
differential; f = 3400 Hz;
R
single-ended; R
differential; R
= 15 mA
= 15 mA; R7 = 68 k ;
= 15 mA
L
L
= 50 mA;
series
= 15 mA; R4 = 100 k ;
(from QR+ or
(from QR+ or
between MIC and
11
CONDITIONS
= 100 ; C
L
= 600
line
L
L
L
= 150
= 450
= 300
L
= 15 mA;
= 47 nF
1.9
17
24
30
0.3
0.4
0.8
0.5
8
MIN.
2.3
2.6
21
4
25
31
0.38
0.52
1.0
50
100
TYP.
72
0.2
0.2
Product specification
TEA1068
25
26
32
0
+8
MAX.
V
V
dBmp
k
dB
dB
dB
dB
V
V
V
dB
UNIT
V
V