PCM1870A中文资料采用麦克风偏置、ALC、音效和陷波滤波器的 90dB SNR 低功耗立体声音频 ADC数据手册TI规格书

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