ADC Dual Delta-Sigma 50ksps 16-bit Serial 24-Pin VQFN EP T/R

The PCM1870 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 24-QFN(4-mm × 5-mm) and 24-DSBGA (2.49-mm × 3.49-mm) packages to save footprint. The PCM1870 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. 

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 f_S/384 f_S), 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
• 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-QFN (4 mm × 5 mm)
• 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