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1FEATURES

· Analog Front End:

– Stereo Single End Input With MUX

– Mono Differential Input

– Stereo Programmable Gain Amplifier

– Microphone Boost Amplifier and Bias

· Analog Performances Dynamic Range: 90 dB

· Power-Supply Voltage

– 1.71 V to 3.6 V for Digital I/O Section

– 1.71 V to 3.6 V for Digital Core Section

– 2.4 V to 3.6 V for Analog Section

· Low Power Dissipation:

– 13 mW in Record, 1.8/2.4 V, 48 kHz, Stereo

– 5.3 mW in Record, 1.8/2.4 V, 8 kHz, Mono

– 3.3 mW in All Power Down

· Sampling Frequency: 5 kHz to 50 kHz

· Auto Level Control for Recording

· Operation by Single Clock Input Without PLL

· 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

· 2 (I2C) or 3 (SPI) Wire Serial Control

· Programmable Function by Register Control:

– Digital Soft Mute

– Hi-Z for LRCK, BCK and DOUT

– Power Up/Down Control for Each Module

– 30-dB to –12-dB Gain for Analog Inputs

– 0/12/20-dB Boost for Microphone Input

– Parameter Settings for ALC

– Three-Band Tone Control and 3D Sound

– High-Pass Filter and Two-Stage Notch Filter

· Pop Noise Reduction Circuit

· Package:

– 24-Pin YZF (2.49 mm × 3.49 mm)

· Operation Temperature Range: –40°C to 85°C

APPLICATIONS

· Portable Audio Player, Cellular Phone

· Video Camcorder, Movie Digital Still Camera

· PMP/DMB, Voice Recorder

DESCRIPTION

The PCM1870A 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-Pin YZF

(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.