Datasheet Summary
~National
~ Semiconductor
Active Filters
AF103 Low Band Splitter
General Description
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 requires no external ponents
- only power supply, input and output connections.
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
±5V to ±18V
4th ORDER...