ASAHI KASEI
[AK4641]
MS0301-E-00
2004/05
- 1 -
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)
1st MIC Amplifier: +20dB or 0dB
2nd 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=50/15s, 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: I
2C 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)
AK4641
16-Bit Σ CODEC with Bluetooth Interface