TECHNICAL DATA
Universal Speech Circuit
with Dialler Interface
The IL3726AN is a low voltage speech network which includes Mic amp. transmit
amp, receive amp. and stabilized DC-supply It handles the voice signal performing
the 2/4 wire interface and changing the gain on both sending and receiving
amplifiers to compensate for line attenuation by sensing the line length through the
line current.
Application dependent parameters such as amplitude of each amp, sidetone level,
line balance and frequency response are controlled by external components. Each
gain can be controlled by external component exchange.
IL3726AN
ORDERING INFORMATION
IL3726AN
T
A
= -40° to 70° C
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Uses a minimum of external components (7 Capacitors & 11 Resistors)
Low Voltage Operating
Symmetrical inputs for microphones, provided good balance to ground
DTMF signal input with confidence tone
Mute input for DTMF dialling
Line loss compensation (line current dependent) for microphone and earpiece amplifiers
Gain control curve adaptable to exchange supply
DC line voltage adjustment facility
BLOCK DIAGRAM
7
8
DC
9
6
1
4
12
13
17
18
10
5
3
11
2
15
14
16
1
INTEGRAL [ INTEGRAL CORP. ]
