[AK4671]
AK4671
Stereo CODEC with MIC/RCV/HP-AMP
GENERAL DESCRIPTION
The AK4671 is a stereo CODEC with a built-in Microphone-Amplifier, Receiver-Amplifier and
Headphone-Amplifier. The AK4671 features dual PCM I/F in addition to audio I/F that allows easy
interfacing in mobile phone designs with Bluetooth I/F. The AK4671 is available in a 57pin BGA, utilizing
less board space than competitive offerings.
FEATURES
Recording Function (Stereo CODEC)
•
4 Stereo Input Selector x 2ch
•
4 Stereo Inputs (Single-ended) or 2 Stereo Input (Full-differential)
•
MIC Amplifier: +30dB
∼ −12dB,
3dB step
•
Digital ALC (Automatic Level Control): +36dB
∼ −54dB,
0.375dB Step, Mute
•
Wind-noise Reduction Filter
•
Stereo Separation Emphasis
•
5-band Programmable Notch Filter
•
Audio Interface Format: 16bit MSB justified, I
2
S, DSP Mode
Playback Function (Stereo CODEC)
•
Digital Volume (+12dB
∼ −115.0dB,
0.5dB Step, Mute)
•
Digital ALC (Automatic Level Control): +36dB
∼ −54dB,
0.375dB Step, Mute
•
Stereo Separation Emphasis
•
5-band EQ
•
Stereo Line Output
•
Mono Receiver-Amp
- BTL Output
- Output Power: 30mW@32Ω (AVDD=3.3V)
•
Stereo Headphone-Amp
- Output Power: 30mW@16Ω (AVDD=3.3V)
•
Analog Mixing: 4 Stereo Input
•
Audio Interface Format:
- 16bit MSB justified, 16bit LSB justified, 16-24bit I
2
S, DSP Mode
Dual PCM I/F for Baseband & Bluetooth Interface
•
Sample Rate Converter (Up sample: up to x6: Down sample: down to x1/6)
•
Sample Rate: 8kHz
•
Digital Volume
•
Audio Interface Format:
- 16bit Linear, 8bit A-law, 8bit
μ-law
- Short/Long Frame, I
2
S, MSB justified
10bit SAR ADC
•
3 Input Selector
Power Management
Master Clock:
(1) PLL Mode
•
Frequencies: 11.2896MHz, 12MHz, 12.288MHz, 13MHz, 13.5MHz, 19.2MHz,
24MHz, 26MHz, 27MHz (MCKI pin)
1fs (LRCK pin)
32fs or 64fs (BICK pin)
(2) External Clock Mode
•
Frequencies: 256fs, 384fs, 512fs, 768fs or 1024fs (MCKI pin)
Output Master Clock Frequencies: 32fs/64fs/128fs/256fs
Sampling Rate (Stereo CODEC):
1.
2.
3.
4.
5.
6.
7.
8.
MS0666-E-00
-1-
2007/10
AKM [ ASAHI KASEI MICROSYSTEMS ]
