ULN3809A phase-locked loop decoder demodulates standard composite FM stereo input signals within the range of 0.25 to 1.7 V pp without the use of tuning coils. Integrated circuit design allows tuning with a single resistive adjustment. The decoder automatically switches between stereo and monaural operation by detection and evaluation of the 19-kHz pilot carrier signal.
Type ULN-3809A exhibits 35 dB suppression of the 19-kHz pilot and 45 dB rejection of the regenerated 38-kHz subcarrier at demodulator output terminals. Stereo channel separation is typically 47dB. With a composite input signal of 850 mV, the total harmonic distortion for the unit is typically 0.06%. Type ULN-3809A is designed to work within a range of supply voltages from 4.5 to 16V.
ULN3809 Pinout
ULN3809 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | VCC | Supply Voltage Pin |
| 2 | COMP: IN | Comparator Input Pin |
| 3 | IN FILT:CAPAC: | Input Filter Capacitor Pin |
| 4 | LEFT OUT | Left Output Pin |
| 5 | RIGHT OUT | Right Output Pin |
| 6 | STER IND: | Stereo Indicator Pin |
| 7 | GND | Ground Pin |
| 8 | THRESH: FILTER+ | Positive Threshold Filter Pin |
| 9 | THRESH: FILTER- | Negative Threshold Filter Pin |
| 10 | PILOT MONITOR | Pilot Monitor Pin |
| 11 | IN FILTER CAPAC: | Input Filter Capacitor Pin |
| 12 | IN FILTER CAPAC: | Input Filter Capacitor Pin |
| 13 | LOOP FILTER | Loop Filter Pin |
| 14 | OSC: RC NTW | Oscillator RC Network Pin |
ULN3809A Features
- Unity Voltage Gain
- I2L and lon Implant Technology
- Wide Dynamic Range
- Low Distortion
- Excellent Channel Separation
- No Tuning Coils
- Automatic Stereo/Mono Switching
- Stereo Indicator Lamp Driver
- Direct Replacement for MC1309
- 14-Pin Dual In-Line Plastic Package
You can download this datasheet for ULN3809A Phase-Locked Loop Stereo Decoder – Datasheet from the link given below:
