AF103 Datasheet - National Semiconductor

AF103 Low Band Splitter

The AF103 is a fourth order elliptic low pass filter designed to reject frequencies above 1200 Hz and pass signals * below 950 Hz. This filter is used to separate the low band of frequencies from the high band in a Dual Tone Multi Frequency (DTMF) Touch Tone® receiver. The unit is fully tuned and.

AF103 Features

* Fully tuned

* High input impedance

* Low output impedance

* Wide power supply range Connection Diagram ~ 121 HP2 -IN2 ijUTPUTllPl -11.11 HP2 111 111 ~ NC 241 23 22 21 20 19 18 17 16 1514 13 I ±5V to ±18V 4th ORDER lOW PASS elLIPTIC FilTER J l I10 111 121 ru122

AF103-NationalSemiconductor.pdf