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TDA4445A and TDA4445B:

• Quadrature intercarrier demodulator
• Very high input sensitivity
• Good signal to noise ratio
• Fast averaging AGC*
• IF amplifier can be switched off for VTR mode
• Good AM* suppression
• Output signal stabilized against supply voltage variations
• Very few external components

Description

• TDA4445A:
• Sound IF amplifier, with FM* processing for quasi parallel sound system.
• TDA4445B:
• Sound IF amplifier, with FM* processing and AM* demodulator, for multi-standard sound TV appli-ances.

• Bistandard applications (B/G and L)
• No adjustment of the AM* demodulator
• Low AM* distortion

Pin-layout:

1. IF input
2. not to be connected
3. IF AGC* time constant
4. not to be connected
5. TDA4445A: not to be connected, TDA4445B: averaging capacitor
6. TDA4445A: not to be connected, TDA4445B: A.F. sound output
7. not to be connected
8. reference L.C. network
9. reference L.C. network
10. not to be connected
11. supply voltage
12. FM* modulated sound output
13. ground
14. not to be connected
15. not to be connected
16. IF input