PA1418

ANALOG PRODUCT DIVISION PA1418 Technical Note Introduction This is a reference note for Protek Analog’s PA1418. The document includes data for the IC, recommended external components, and other pertinent information. Please read all instructions and recommendations before beginning to design any product that is to include this device. This document contains a checklist to reference before powering up completed circuit and troubleshooting procedures outlining causes and countermeasures for issues arising in the application of the IC. Contact information is included if this document is insufficient to answer any problems or questions that may arise. Contents Overview. 1.1. Features 1.2. Block Diagrams 24TSSOP Pin out 32 QFN Pin out 1.3. Absolute Maximum Ratings 1.4. Operating Range 2. Operation. 3. Navigator. 4. Explanation of External Parts. 4.1. Pre-Emphasis 4.2. Limiter 4.3. Low-Pass Filter 4.4. Half VDD Filter 4.5. Composite Signal Adjust 4.6. RF Oscillator 4.7. RF Output 4.8. X’TAL Oscillator 4.9. Serial Data Input 4.10. Phase Lock Loop 4.11. Audio Mute 4.12. Pilot Signal Adjust 5. PCB Sample and Recommendations. 1. 1. Overview: The PA1418 is a Radio Transmitter that can send audio signals from personal computers, game consoles or independent devices to any type of audio equipment with a built in FM receiver. The IC consists of a Pre-Emphasis circuit that improves Signal to Noise Ratio (S/N), a Limiter circuit that prevents over-modulation and a low Pass filter (LPF) cir...