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AK5374

24-bit Stereo ADC with USB Interface

Asahi Kasei Microdevices 

[AK5374]

AK5374

24-bit Stereo ADC with USB Interface

GENERAL DESCRIPTION

The AK5374 is a stereo A/D converter with a USB 2.0 interface. The device includes an integrated USB

serial interface engine, a USB transceiver, an audio class processing block, endpoints, and a 24-bit

stereo audio ADC. An integrated PLL enables the use of multiple sampling frequencies. A microphone

amplifier and an integrated programmable gain amplifier are available for processing low-level signals

from an analog microphone element. An external EEP-ROM is used to store the descriptor information.

The AK5374 is housed in a 36-pin package. It is a low power device, operating from +3.3V, and

consuming just 100mW in active mode and less than 100μA in suspend mode.

FEATURES

† USB 2.0 compliant (full speed audio class)

† USB audio controller

USB serial interface engine

Audio class encoder/decoder

† USB synchronization

Synchronous type (synchronize with 1ms SOF)

† 24-bit stereo A/D converter with mute control

S/(N+D) = 85dB, S/N = 91dB (AVDD=3.3V, MIC-Amp = 0dB)

S/(N+D) = 70dB, S/N = 78dB (AVDD=3.3V, MIC-Amp = +30dB)

† Microphone amplifier gain:

0dB, +6dB, +12dB, +18dB, +24dB, +30dB, +36dB

† Digital programmable gain: +24dB ~ -31dB, 1dB Step

† Integrated PLL supports standard sampling frequencies

8kHz, 11.025kHz, 16kHz, 22.05kHz, 32kHz 44.1kHz, 48kHz

† EEP-ROM interface for descriptors

† Power Management

† Low power consumption

30mA in active mode

Less than 100μA in suspend mode

† Power Supply:

Analog Power Supply (AVDD): 3.0 ~ 3.6V

Digital Power Supply (DVDD): 3.0 ~ 3.6V

† Ta = -10 ~ +70°C

† Package:

36pin QFN (5 x 5 mm, 0.4mm pitch)

MS1197-E-00

-1-

2010/06

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