AK4641 Datasheet, PDF (1/51 Pages) Asahi Kasei Microsystems – 16 BIT CODEC WITH BLUETOOTH INTERFACE

ASAHI KASEI
[AK4641]
AK4641
16-Bit ∆Σ CODEC with Bluetooth Interface
GENERAL DESCRIPTION
The AK4641 is targeted at PDA and other low-power, small size applications. It features a 16bit Stereo
CODEC with a built-in Microphone-Amplifier and 16bit Mono CODEC for Bluetooth Interface. Input
circuits include Microphone-Amplifier and ALC (Auto Level Control) circuit. The AK4641 is available in a
36pin QFN, utilizing less board space than competitive offerings.
FEATURES
1. Recording Function of 16bit Stereo CODEC
• Mono Input
• 2 to 1 Selector (Internal and External MIC)
• 1^st MIC Amplifier: +20dB or 0dB
• 2^nd Amplifier with ALC: +27.5dB ∼ −8dB, 0.5dB Step
• ADC Performance: S/(N+D): 81dB, S/N: 86dB
• Sampling Rate: 7kHz ∼ 48kHz
• Audio Interface Format: I²S, 16bit MSB justified
2. Playback Function of 16bit Stereo CODEC
• Digital De-emphasis Filter (tc=50/15µs, fs=32kHz, 44.1kHz, 48kHz)
• Digital Volume (0dB ∼ −127dB, 0.5dB Step, Mute)
• 5 Band Equalizer
• Stereo Line Output
- Performance: S/(N+D): 86dB, S/N: 90dB
• Mono Line Output
- Differential Output
- Performance: S/(N+D): 86dB, S/N: 93dB
• AUX Input
- Differential Input
- +24dB ∼ −21dB, 3dB step
• Sampling Rate: 7kHz ∼ 48kHz
• Audio Interface Format: I²S, 16bit MSB justified, 16bit LSB justified
3. 16bit Mono CODEC
• Analog Mix Path for Bluetooth Interface
• Sample Rate: 8kHz ∼ 16kHz
• Audio Interface Format: Short/Long Frame, I²S, 16bit MSB justified
4. Power Management
5. Master Clock: 1.792MHz ∼ 12.288MHz
6. Control mode: I²C Bus
7. Ta = −10 ∼ 70°C
8. Power Supply: 2.6V∼ 3.6V (typ. 3.3V)
9. Power Supply Current: 17mA
10. Package: 36pin QFN (0.5mm pitch)
MS0301-E-00
-1-
2004/05