DESCRIPTION

· The AK5705 is a high-performance four-channel 32-bit ADC designed for audio, voice recognition, voice control, and teleconferencing applications.

· It features a low-noise, low-power microphone amplifier with a dynamic range of 109 dB, suitable for high S/N microphone applications.

· Includes a built-in transimpedance amplifier for current-to-voltage conversion, enabling sensor or photodiode output current to be digitized.

· Supports sampling frequencies up to 384 kHz and can be used in 16-channel microphone arrays by connecting multiple AK5705s.

FEATURES

· 4-Channel Low Power 32-bit ADC with two types of digital filters: Low-latency and Voice.

· Single-ended or full-differential inputs with integrated AC coupling capacitor.

· MIC Amplifier Gain adjustable from +24 dB to 0 dB in 3 dB steps.

· ADC Characteristics: S/N, DR: 109 dB, THD+N: −87 dB (Gain = 0 dB); S/N, DR: 100 dB, THD+N: −86 dB (Gain = +18 dB).

· Power Supply Noise Reduction PSRR: 58 dB.

· Digital Audio Interface supports Master/Slave Mode with sampling frequencies from 8 kHz to 384 kHz.

· Interface Formats: 32/24/16-bit I2S/MSB justified, 4-ch TDM, 8/12/16-ch Cascade TDM.

· Built-in PLL and Control I/F: I2C-bus (Fast-mode, Max. 400 kHz).

· Operating Temperature Range: −40 to 85 °C.

· Power Supply: AVDD 1.7 V to 1.9 V or 3.0 V to 3.6 V; TVDD 1.65 V to 3.6 V.

· Package: 25-pin CSP (2.1275 x 2.2085 mm, 0.4 mm pitch).

APPLICATIONS

· Audio recording and processing.

· Voice recognition and control systems.

· Teleconferencing equipment.

· High S/N microphone applications.

· Sensor and photodiode signal processing.