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