CRY573 Digital Microphone Converter

The CRY573 facilitates the conversion of PDM and I2S signals to analog output with software-controlled switching. It offers adjustable sampling rates ranging from 8kHz to 48kHz(available only in PDM mode) and allows for fine-tuning of left and right channel gains. ‍ Connected via USB, the CRY573 appears as a virtual serial port on your PC, enabling straightforward configuration adjustments through this interface.

Freedom of mode switching

Multi-level compatible

Easy operation

Features

USB interface

The CRY573 is powered and communicates via a USB interface. Please note that the USB interface has a recommended load current of ≤ 100mA. The device supports flexible switching between PDM and I2S modes, allowing users to adjust the signal sampling rate and analog output gain through the accompanying software.

Key Features

DIP switch

The CRY573 utilizes a DIP switch to set the working voltage of the device chip, offering options of 3.3V, 3.0V, 2.8V, 2.0V, and 1.8V, with a deviation within 0.1V. This allows for precise matching of digital signals to the varying electrical levels of external devices.

Analog signal output

Analog signal output is provided through a 3.5mm audio jack, with left and right channels corresponding directly to the digital signal’s left and right channels.

Additional Features

PDM signal input

Supports a single PDM signal input (including both L/R channels). The software allows you to configure the clock frequency (sampling rate) for the PDM interface and adjust the gain for the left and right channels of the analog output.

I2S signal input

Supports a single I2S signal input (standard I2S mode only), accommodating L/R channels with frame lengths of 16 to 32 bits per channel. The software allows you to adjust the gain for both the left and right channels of the analog output.

Technical Specifications

Mode

PDM/I2S

Noise floor

-95dB：A weighting；-92dB：Z weighting（20Hz-20kHz）

Dynamic range

>90dB（1kHz，A-weighting）

Frequency response

<±0.15dB（20Hz-20kHz）

THD

<0.03%@1kHz

Sampling rate

PDM：8kHz，12kHz，16kHz，24kHz，32kHz，37.5kHz，48kHz；I2S：48kHz

Supported level

3.3V，3.0V，2.8V，2.0V，1.8V

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