AF102 Datasheet - National Semiconductor

AF102 Dial Tone Reject Filter

The AF102 is a fourth order elliptic highpass filter designed to reject frequencies below 650Hz. This filter rejects the 350Hz and 440Hz dial tone frequencies present on a telephone line. The unit is fully tuned and requires no external components - only input, output and power supply connections. C.

AF102 Features

* Fully tuned

* High input impedance

* Low output impedance

* Wide power supply range ±5V to ±18V ~ IZI k1UTPUT!-INZ LPZ LPI -INI HPZ 111 111 @±l NC 13124 23 22 21 20 19 18 17 16 15114 4th OROER HIGH PASS ELLIPTIC FILTER ~J I10 111 121 02 ~ 01 ~ 112 BPI NC NC Ceram

AF102-NationalSemiconductor.pdf