768kHz 2ch Asynchronous 32-bit Premium SRC

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Premium SRCs AK4137EQ

VELVET SOUNDVERITA The AK4137EQ is a 2ch digital sampling rate converter (SRC). The input sampling rate ranges from 8kHz to 768kHz. The output sampling rate is from 8kHz to 768kHz. The AK4137EQ has an internal Oscillator. Therefor it does not need any external master clocks and simplifies a system configuration. The AK4137EQ is suitable for the application interfacing to different sampling rates such as high-end Audio Systems and USB-DACs. It is capable of playback various audio formats with PCM-DSD data conversion function.

● PCM / DSD conversion function
AK4137EQ supports conversion from 2.8/5.6/11.2MHz DSD to PCM format, and vice versa.
● Maximum Sampling Frequency, Bit rate: PCM768kHz/32-bit, DSD256(11.2MHz)
● DR: 186dB
● THD+N: -150dB
● Sound Color Digital Filter: 4 types

● Application
It is ideal for applications such as Network Audio focusing sound quality, SACD player, high-end audio system, car infotainment system, etc..



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Key Features

● 2 channels input/output
● Asynchronous Sampling Rate Converter
Input Sampling Rate Range(FSI):
Output Sampling Rate Range(FSO):

8 to 768kHz
8 to 768kHz
Input Sampling Rate Range(FSI):
Output Sampling Rate Range(FSO):

2.8224 to 11.2896MHz
2.8224 to 11.2896MHz
● Input to Output Sampling Rate Ratio: FSO/FSI = 1/6 to 24
● THD+N: Up to -150dB
● Dynamic Range: 186dB (A-weighted)
● I/F format: MSB justified, LSB justified, I2S compatible and TDM
● PCM/DSD converter
● Dop I/F
● Oscillator for Internal Operation Clock
● Clock for Master mode: 64/128/192/256/384/512/768fso
● On-chip X’tal oscillator
● Digital De-emphasis Filter (32KHz, 44.1KHz, 48KHz)
● Soft Mute Function
● SRC Bypass mode (Master/Slave, PCM, DSD)
● uP Interface: I2C bus/SPI 4wires
● Power Supply: DVDD: 3.0 to 3.6V
DVDD: 1.7 to 1.9V (LDO OFF mode)
● Operating Temperature: Ta= -40 to +105°C
● Package: 48-pin LQFP (0.5mm pitch)

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