Philips Semiconductors
Product specification
Low voltage versatile telephone
transmission circuit with dialler interface
TEA1067
PARAMETER
CONDITION
SYMBOL
MIN.
TYP.
MAX.
UNIT
Gain adjustment GAR
Gain variation of receiving
amplifier achievable by
varying R4 between
GAR and QR
∆Gv
−11
−
+8
dB
Mute input
Input voltage HIGH
Input voltage LOW
Input current
VIH
1.5
−
−
−
8
VCC
0.3
15
V
VIL
V
IMUTE
−
µA
Gain reduction
MIC+ or MIC− to LN
Voltage gain from DTMF
to QR+ or QR−
MUTE = HIGH
∆Gv
−
70
−
dB
dB
MUTE = HIGH;
R4 = 100 kΩ;
single-ended;
RL = 300 Ω
Gv
−21
−19
−17
Power-down input PD
Input voltage HIGH
Input voltage LOW
Input current
VIH
VIL
IPD
1.5
−
−
−
5
VCC
0.3
10
V
V
−
µA
Automatic gain control
input AGC
Controlling the gain
from IR to QR+/QR− and
the gain from MIC+/MIC−
to LN; R6 between AGC
and VEE
R6 = 110 kΩ
Gain control range
Iline = 70 mA
∆Gv
Iline
Iline
−5.5
−
−5.9
23
−6.3
−
dB
Highest line current for
maximum gain
mA
mA
Minimum line current for
minimum gain
−
61
−
Reduction of gain between
I
I
line = 15 mA and
line = 35 mA
∆Gv
−1.0
−1.5
−2.0
dB
June 1990
14
NXP [ NXP ]
