Recording/Playback ICs
| ML2308 - Stereo Recording/Playback LSI |
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 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. |
inputs are converted into digital signals by the analog to digital converter, and output to external equipment via the buffer memory.
| Recording/Playback IC line-up |
| Part Number | Function | ADC/ DAC |
Sampling [kHz] |
Max. Rec. Time | Supply Voltage |
Max. Current |
Clock Frequency |
Packages | Op Temp |
Product Status | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ML2302 |  |
ADPCM/ADPCM2/PCM, FIFO, DMA I/F, ext. DAC I/F, speaker amp. |
14bit | 4~25.6 | depends on external memory size |
+2.7~ +3.6V | 20mA | 16MHz | 64TQFP 71WCSP, Chip |
-10~ +70°C | VP |
ML2308 |
|
µ-law G.711/ ADPCM2/ PCM, data buffer, I2S I/F, PWM, speaker/ headphones driver | 1bit Δ-Σ (stereo) |
4~32 | +2.7~ +3.6V | 40mA | 24MHz | 48QFP | -20~ +70°C | VP | |
| MSM9841* | |
ADPCM/ADPCM2/PCM, FIFO, DMA I/F, ext. DAC I/F, stereo |
14bit (Two DACs) |
4~16 | +2.7~ +5.5V | 30mA | 4MHz/ 5.6MHz |
56QFP, Chip |
-40~ +85°C | VP | |
| MS87V1021 | |
Multi-Function ADPCM Recorder, 2Mbit DRAM, 512Kbit ROM | 14bit | 4 ~ 10.6 | 128 sec | +2.7 ~ 3.6V | 15mA | 4MHz | 32TSOP | -20 ~ +70°C | VP |
*MSM9841 is a recording function added version of MSM9842 (the speech synthesis LSI with built-in FIFO). ADPCM: Adaptive Differential Pulse Code Modulation, ADPCM2 improves over ADPCM in terms of computing accuracy, recording-playback times are given at 16kbps bit-rate and maximum memory address range of the speech processor without expansions. |
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| Speech Analyzing/Editing Tools |
| Part Number | Description | Usage | Features | Product Status | |
|---|---|---|---|---|---|
| AR207-FULL | |
Wave form editor, pre-playback, convert to ROM data, Programming to PROM |
Speech Development Tool | Windows©98SE/ME/2000/XP/DOS/V USB Controller to program PROM |
VP |
| AR207-STD | |
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ML2302 control kit |
convert to ROM data for ML2302 | Speech Development Tool, Evaluation Kit |
Windows©98SE/ME/2000/XP/DOS/V | VP | |
| MSM9841 control kit | |
convert to ROM data for MSM9841 | Speech Development Tool, Evaluation Kit |
Windows©98SE/ME/2000/XP/DOS/V | VP |
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