AK4137EQ Datasheet, PDF (1/65 Pages) Asahi Kasei Microsystems – 32bit SRC with PCM/DSD conversion

[AK4137]
= Preliminary =
AK4137
32bit SRC with PCM/DSD conversion
1. General Description
The AK4137 is a 2ch digital sample rate converter (SRC). The input sample rate ranges from 8kHz to
768kHz. The output sample rate is from 8kHz to 768kHz. The AK4137 has an internal Oscillator.
Therefor it does not need any external master clocks and simplifies a system configuration. The
AK4137 is suitable for the application interfacing to different sample rates such as high-end Audio
Systems and USB-DACs. It is capable of play backing various audio formats with PCM-DSD data
conversion function.
2. Features
 2 channels input/output
 Asynchronous Sample Rate Converter
 PCM
Input Sample Rate Range(FSI): 8kHz~768kHz
Output Sample Rate Range(FSO): 8kHz~768kHz
 DSD
Input Sample Rate Range(FSI): 2.8224MHz~11.2896MHz
Output Sample Rate Range(FSO): 2.8224MHz~11.2896MHz
 Input to Output Sample Rate Ratio: FSO/FSI = 1/6 ~ 24
 THD+N: Up to −150dB
 Dynamic Range: 188dB (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: 3.0~3.6V
DVDD: 1.7~1.9V (LDO OFF mode)
 Operating Temperature: Ta= −40 ~ +105°C
 Package
AK4137: 48-pin LQFP (0.5mm pitch)
Rev. 0.2
2014/06
-1-