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The Clare CPC5710N is a CMOS special purpose fixed-gain amplifier with comparator for telephone line monitoring. The high (>40 dB) common-mode rejection ratio makes the CPC5710N an excellent choice for signal monitoring, discrete voice recording, and line condition monitoring applications. TheCPC5710N is ideal for modem applications including embedded modem designs like set-top boxes, and voice recording applications.
CPC5710N Maximum Ratings
Parameter
Minimum
Maximum
Unit
VDD
-0.3
6
V
Storage temperature
-40
+125
°C
Total package power dissipation
300
mW
Logic input voltage
-0.3
VDD + 0.3
V
Absolute maximum ratings are stress ratings. Stresses in excess of these ratings can cause permanent damage to the device. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this data sheet is not implied. Exposure of the device to the absolute maximum ratings for an extended period may degrade the device and affect its reliability.
CPC5710N Features
• Excellent common-mode rejection ratio (CMRR), >40 dB • Supplied application circuits can meet isolation requirements of worldwide telephony standards • Small 8-pin SOIC • Worldwide telephone network compatibility • Full-wave ringing level detector comparator with internal threshold, large hysteresis, and logic-level output • 3.3 or 5.0 Volt operation • High differential input impedance, very low commonmode input impedance • Fixed gain • Differential or single-ended linear output • TTL logic input • CMOS logic output (TTL compatible) • Virtually non-detectable in voice monitoring applications
CPC5710N Typical Application
• In signal monitoring applications, CPC5710N can be used for: • Display feature (caller ID) signal processing • Line-in-use detection (another-phone-off-hook) • Ringing signal level detection • Battery presence monitoring • Tip and ring lead voltage monitoring • Line condition detection, including line polarity, tip and ring lead voltage, and battery presence