描述 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-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.

特性 Features

? 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 μW 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-DSBGA (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