In this project
The TDA8340 and TDA8341 are integrated IF amplifier and demodulator circuits for colour or black/white television receivers, the TDA8340 is for application with NPN tuners and the TDA8341 for PNP tuners. The TDA8340 and TDA8341 are pin-compatible successors with improved performance to types TDA2540/2541 and TDA3540/3541
IF Amplifier
An (IF) Intermediate Frequency amplifiers are stage amplifiers used to raise signal levels in radio and television receivers, at frequencies intermediate to the higher radio-frequency (RF) signal from the antenna and the lower (baseband) audio or video frequency that the receiver is recovering.
TDA8341 Pinout
TDA8341 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | BALANCE IN 1 | Balance IF Input 1 |
| 2 | DECOUPLING 1 | IF Amplifier Decoupling 1 |
| 3 | AGC STARTING POINT | Tuner AGC Starting Point Adjustment |
| 4 | AGC OUT | Tuner AGC Output |
| 5 | AFC OUT | AFC Output |
| 6 | AFC ON/OFF SWITCH | AFC On/Off Switch And Sample and Hold Capacitor |
| 7 | REFERENCE CARRIER 1 | Reference Carrier 1 Pi/2 rad. Phase Shift |
| 8 | PICTURE CARRIER 1 | IF Picture Carrier Passive Regeneration 1 |
| 9 | PICTURE CARRIER 2 | IF Picture Carrier Passive Regeneration 2 |
| 10 | REFERENCE CARRIER 2 | Reference Carrier 2 Pi/2 rad. Phase Shift |
| 11 | VCC | Positive Supply Voltage |
| 12 | VIDEO OUT | Video Output |
| 13 | GND | Ground |
| 14 | AGC CAPACITOR | IF AGC Capacitor and VCR Switch |
| 15 | DECOUPLING 2 | IF Amplifier Decoupling 2 |
| 16 | BALANCE IN 2 | Balance IF Input 2 |
TDA8341 Key Features
- Full range gain-controlled wide-band IF amplifier
- Linear synchronous demodulator with excellent intermodulation performance
- White spot inverter
- Wide-band video amplifier with noise protection
- AFC circuit with AFC on/off switching and sample-and-hold function
- Low impedance AFC output
- AGC circuit with noise gating
- External video switch for switching-off the video output
- Reduced sensitivity for high sound carriers
- Integrated filter to limit second harmonic IF signals
- Wide supply voltage range
- Requires few external components
Application
You can download this datasheet for TDA8341 Television IF Amplifier from the link given below:
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