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 100 A in suspend mode. |
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- Applications: USB Microphones, USB Audio Interfaces
- 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
- External Digital Audio Interface
- Power Management
- Low power consumption
30mA in active mode
Less than 100 A 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: 48pin LQFP (5
 5 mm, 0.4mm pitch)
- Evaluation Board: AKD5374
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