[AK5704] AK5704
Low-Power 4-ch 32-bit ADC with MIC-Amp
1. General Description
The AK5704 is a high performance analog front-end AD converter IC ideal for voice recognition, voice
control, and conferencing applications. The device has a built-in 4-ch 32-bit ADC and a low noise
microphone amplifier and extracts full performance of a high S/N microphone with low power
consumption by achieving dynamic range of 105dB. It is possible to support up to 16-ch microphone array
by connecting multiple AK5704’s. In addition, since it incorporates ultra-low power consumption voice
activity detection, power consumption during wait time is greatly reduced. The AK5704 1. 2.
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8. 9. 2. Features
Recording Function
• 4-Channel Low Power 32-bit ADC
2-types Digital Filter (Low-latency [5/fs] Sharp Roll-off and Voice)
• Single-ended Inputs or Full-differential Inputs
• MIC Amplifier Gain: +30 dB to 0 dB, 3 dB step
• 2-output MIC Power Supplies: 2.8 V / 2.5 V / 1.8 V / Direct Mode Selectable
• ADC Characteristics:
S/N, DR: 105 dB, THD+N: 90 dB, (Gain = 0 dB)
S/N, DR: 96 dB, THD+N: 86 dB, (Gain = +18 dB)
• Excellent Power Supply Noise Reduction …