1. When your device connected to the amplifier sound hours can use this circuit, suitable for audio small signal amplification
2. Low distortion, low voltage, low power consumption of high-fidelity preamp headphone amplifier board
3. Built-in negative voltage conversion chip, the actual power supply is ± DC, the amplification is about 8 times
4. The chip is MC33202, rail-to-rail dual op-amp, maximum drive current 80ma
5. Input and output with 3.5 and lotus two kinds of interfaces, according to the need to use one of the two interfaces is to facilitate the adaptation of different occasions
Chip: MC33202
Supply voltage: DC 3-5V (maximum can not exceed 5.5V, built-in negative voltage conversion chip, the actual power supply for ± DC)
Maximum drive current: 80ma
Rail-to-rail dual op-amp
Amplification: about 8 times (18db)
Circuit board size: 8.3*4.8cm
Input and output with 3.5 headphone seat and Lotus two kinds of interface, according to the need to use one of them can be two kinds of interface is to facilitate everyone to adapt to different occasions, can 3.5 headphone seat into 3.5 headphone seat out; Lotus seat into Lotus seat out; 3.5 headphone seat into Lotus seat out; Lotus seat into 3.5 headphone seat out.
Audio circuit to the power supply requirements are relatively high, please use low ripple power supply, power supply is not good easy to produce AC sound, audio connection line to use shielded wire.
1* Module
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