DS-CPC5712-R02

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1

CPC5712

Voltage Monitor with Detectors

Pb

Features

with Programmable Hysteresis

(CMRR) > 55dB

worldwide telephony standards

Applications

Description

The CPC5712 is a special purpose Voltage Monitor

with Detectors integrated circuit that is used in various

high-voltage telephony applications such as VoIP

gateways and IP-PBXs. The device monitors the

TIP/RING potential through a high-impedance divider

(resistor isolation) to derive two programmable signal

level detects, polarity information, and a scaled

representation of the phone line voltages. In use, the

resistor divider and the high input impedance of the

CPC5712 make the circuit practically undetectable on

the line.

The two voltage-level detects are programmed with

external resistors, which gives the designer complete

freedom with respect to line voltage detection levels.

The level settings also have programmable hysteresis

to prevent false triggering conditions. Detection of

these levels allows the user to determine the condition

of the line.

This device can also be used in non-telephony

applications such as instrumentation and industrial

controls, especially when a low-level differential level

needs to be detected in the presence of a large

common-mode voltage.

Ordering Information

CPC5712 With Support Components

Part

Description

CPC5712U

16-Pin SOP (100/Tube)

CPC5712UTR

16-Pin SOP (2000/Reel)

DET1

DET2

POLARITY

+

-

IN+

IN-

OUT+

TIP

RING

OUT -

OUT+

V

CC

10

13

12

11

9

1

14

7

8

4

5

6

3

2

R

DIFF

R1

R5

R4

R3

R2

V

REF

V

L1

V

H1

V

L2

V

H2

G = 5

CPC5712

V+

Voltage Level Detect 2

Voltage Level Detect 1

Polarity Output

+ Analog Output

- Analog Output

R

IN2

R

IN1

GND

15

16