AK5702VN

Low Power 4ch ADC with ALC, MIC-Amp & PLL

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Description

The AK5702 features a 4-channel ADC. Input circuits include a Microphone-Amplifier with programmable gain and an ALC (Auto Level Control) circuit, making it ideal for consumer microphone array applications. On-chip PLL and TDM audio format makes it easy to connect with DSP. The AK5702 has a software compatibility with stereo version, AK5701.

Key Features

1. Recording Function

- 4-Channel ADC

- 3:1 Stereo Input Selector

- Full-differential or Single-ended Input

- MIC Amplifier (+36dB/+30dB/+15dB/0dB)

- Input Voltage: 1.8Vpp@AVDD=3.0V (= 0.6 x AVDD)

- ADC Performance:

S/(N+D): 83dB, DR, S/N: 89dB@MGAIN=0dB

S/(N+D): 83dB, DR, S/N: 87dB@MGAIN=+15dB

- Digital HPF for DC-offset cancellation (fc=3.4Hz@fs=44.1kHz)

- Digital ALC

- Input Digital Volume (+36dB to -54dB, 0.375dB Step, Mute)

2. Sampling Rate:

- PLL Slave Mode (LRCK pin): 7.35kHz to 48kHz

- PLL Slave Mode (BCLK pin): 7.35kHz to 48kHz

- PLL Slave Mode (MCKI pin):

8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz

- PLL Master Mode:

8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz

- EXT Slave Mode:

7.35kHz to 48kHz (256fs), 7.35kHz to 26kHz (512fs),

7.35kHz to 13kHz (1024fs)

3. PLL Input Clock:

- MCKI pin:

27MHz, 26MHz, 24MHz, 19.2MHz, 13.5MHz, 13MHz, 12.288MHz, 12MHz, 11.2896MHz

- LRCK pin: 1fs

- BCLK pin: 32fs/64fs

4. Master/Slave mode

5. Audio Interface Format: MSB First, 2’s complement

- DSP Mode, 16bit MSB justified, I2S

- Cascade TDM interface

6. µP I/F: 3-wire Serial or I2C Bus (Ver 1.0, 400kHz Mode)

7. Power Supply:

- AVDD: 2.4 to 3.6V

- DVDD: 1.6 to 3.6V (Stereo Mode)

- DVDD: 2.0 to 3.6V (TDM128 Mode, 16bit x 8ch)

- DVDD: 2.7 to 3.6V (TDM256 Mode, 32bit x 8ch)

8. Power Supply Current: 13 mA (EXT Slave Mode)

9. Ta = -30 to 85°C

10. Package: 32pin QFN (5mm x 5mm)

11. Register Compatible with AK5701

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Block Diagram

Block Diagram

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