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: I
2
S, 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: I
2
S, 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, I
2
S, 16bit MSB justified
4. Power Management
5. Master Clock: 1.792MHz
∼
12.288MHz
6. Control mode: I
2
C 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
AKM [ ASAHI KASEI MICROSYSTEMS ]
