Description

AK2347B includes audio filter, limiter, splatter filter, compandor, scrambler, which is highly integrated two-way radio baseband functions for FRS and LMR.

Audio high-pass filter shows a high attenuation in magnitude response characteristics under 250Hz that supports to eliminate a subaudio tone clearly.

Features

• Audio processing

• TX and RX amplifier

• Pre/De-emphasis circuit

• Compressor and Expander with no external components

• Scrambler and De-scrambler in frequency inversion type (3.388kHz or 3.290kHz)

• Limiter with level adjuster

• Splatter filter for wide and narrow band

• Digital controlled amplifier for microphone, modulator and demodulator sensitivity

• Sub-Audio filter with level adjuster for CTCSS and DCS

• Low power supply operation: 2.7 to 3,3V

• Wide range operating for temperature: -40 to 85 °C

• Oscillator circuit for 3.6864MHz and 3.579545MHz crystal

• Serial control interface operation

• Compact plastic packaging, 24-pin SSOP