AK5702 Datasheet, PDF (1/76 Pages) Asahi Kasei Microsystems – 4-Channel ADC with PLL & MIC-AMP

[AK5702]
AK5702
4-Channel ADC with PLL & MIC-AMP
GENERAL 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.
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 ∼ −54dB, 0.375dB Step, Mute)
2. Sampling Rate:
- PLL Slave Mode (LRCK pin): 7.35kHz ∼ 48kHz
- PLL Slave Mode (BCLK pin): 7.35kHz ∼ 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 ∼ 48kHz (256fs), 7.35kHz ∼ 26kHz (512fs),
7.35kHz ∼ 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 ∼ 3.6V
- DVDD: 1.6 ∼ 3.6V (Stereo Mode)
- DVDD: 2.0 ∼ 3.6V (TDM128 Mode, 16bit x 8ch)
- DVDD: 2.7 ∼ 3.6V (TDM256 Mode, 32bit x 8ch)
8. Power Supply Current: 13 mA (EXT Slave Mode)
9. Ta = −30 ∼ 85°C
10. Package: 32pin QFN (5mm x 5mm)
11. Register Compatible with AK5701
MS0623-E-00
-1-
2007/06