Stereo Recording/Playback LSI
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PDF of this Product Introduction Sheet(208 KB) is available. ML2308_PI.pdf
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Description
The ML2308 is a stereo recording/playback LSI that has integrated in a single chip all the functions required for recording and playing back audio data. Analog signals fed into the microphone or line inputs are converted into digital signals by the analog to digital converter, and output to external equipment via the buffer memory. Further, digital signals from external equipment are converted into PWM signals by the 1-bit digital to analog converter, and output by the PWM driver that can directly drive the headphones. The influence of noise is lower with the ML2308 when compared with the mixed analog LSI, since most of the signals are digitally processed inside the LSI.
Block Diagram
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Features
| User Interfaces
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Supports Serial Peripheral Interface(SPI) or 8-bit bus interface
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Buffer memory for audio data buffer: 128 bytes (64 bytes each for left and right channels) |
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Buffer memory status output pins FUL,MID,EMP
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Codec Section/audio input and output sections
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Audio synthesis method:
µ-law G.711 compliant 8-bit PCM, 8-bit/16bit linear PCM,8-bit Oki non-linear PCM
2-bit/3-bit/4-bit/4-bit/5-bit/6-bit/7-bit/8-bit ADPCM2
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Sampling frequency:4.0 KHz to 32 KHZ |
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Built in stereo Δ-Σ type 1-bit A/D converter S/(N+D):80 db DR,S/N:85 db |
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Built in stereo Δ-Σ type 1-bit D/A converter S/(N+D):75 db DR,S/N:85 db |
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Built in DWM driver for driving a speaker (150mW max,RL=16Ω,at BTL) |
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Microphone amplifier *2,Liner amplifier *2(Stereo) |
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Dynamic Range Control(DRC)automatic recording level adjustment function |
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Recording input level detect function
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| Control Commands
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Volume Control :
256 steps, 0db to -48.16db ,OFF
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PAN Control :
16 steps, 0db to -24.08db ,OFF
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Power supply voltage :+2.7 V to +3.6 V
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Operating Temperature :
-20 ° C to +70 ° C
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Source oscillation frequency :24.576MHz
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Package :
48-pin plastic QFN (P-VQFN48-0707-0-0.50)(ML2308GD)
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