PCM1870A
16位低功耗立体声音频ADC，具有麦克风偏置和麦克风放大器 16-Bit Low-Power Stereo Audio ADC With Microphone Bias and Microphone Amplifier
The is a low-power stereo ADC designed for portable digital audio applications, with line-input amplifier, boost amplifier, microphone bias, programmable gain control, sound effects, and auto level control ALC. It is available in a 24-DSBGA 2.49-mm × 3.49-mm package to save footprint. The PCM1870A accepts right-justified, left-justified, I2S, and DSP formats, providing easy interfacing to audio DSP and encoder chips. Sampling rates up to 50 kHz are supported. The user-programmable functions are accessible through a 2- or 3-wire serial control port.
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- Analog Front End:
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- Stereo Single End Input With MUX
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- Mono Differential Input
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- Stereo Programmable Gain Amplifier
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- Microphone Boost Amplifier and Bias
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- Analog Performances Dynamic Range: 90 dB
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- Power-Supply Voltage
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- 1.71 V to 3.6 V for Digital I/O Section
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- 1.71 V to 3.6 V for Digital Core Section
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- 2.4 V to 3.6 V for Analog Section
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- Low Power Dissipation:
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- 13 mW in Record, 1.8/2.4 V, 48 kHz, Stereo
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- 5.3 mW in Record, 1.8/2.4 V, 8 kHz, Mono
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- 3.3 µW in All Power Down
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- Sampling Frequency: 5 kHz to 50 kHz
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- Auto Level Control for Recording
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- Operation by Single Clock Input Without PLL
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- System Clock: Common Audio Clock
256 fS/384 fS, 12/24, 13/26, 13.5/27, 19.2/38.4, 19.68/39.36 MHz
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- 2 I2C or 3 SPI Wire Serial Control
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- Programmable Function by Register Control:
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- Digital Soft Mute
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- Hi-Z for LRCK, BCK and DOUT
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- Power Up/Down Control for Each Module
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- 30-dB to -12-dB Gain for Analog Inputs
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- 0/12/20-dB Boost for Microphone Input
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- Parameter Settings for ALC
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- Three-Band Tone Control and 3D Sound
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- High-Pass Filter and Two-Stage Notch Filter
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- Pop Noise Reduction Circuit
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- Package:
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- 24-DSBGA 2.49 mm × 3.49 mm
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- Operation Temperature Range: -40°C to 85°C
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- APPLICA ONS
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- Portable Audio Player, Cellular Phone
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- Video Camcorder, Movie Digital Still Camera
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- PMP/DMB, Voice Recorder
