[AK4645EZ]
AK4645EZ
Stereo CODEC with MIC/HP-AMP
GENERAL DESCRIPTION
The AK4645 is a stereo CODEC with a built-in Microphone-Amplifier and Headphone-Amplifier. The
AK4645 features analog mixing circuits and PLL that allows easy interfacing in mobile phone and portable
A/V player designs. The AK4645 is available in a 32pin QFN (4mm x 4mm), utilizing less board space
than competitive offerings.
FEATURES
1. Recording Function
•
4 Stereo Input Selector
•
Stereo Mic Input (Full-differential or Single-ended)
•
Stereo Line Input
•
MIC Amplifier (+32dB/+26dB/+20dB or 0dB)
•
Digital ALC (Automatic Level Control)
(+36dB
∼ −54dB,
0.375dB Step, Mute)
•
ADC Performance: S/(N+D): 83dB, DR, S/N: 86dB (MIC-Amp=+20dB)
S/(N+D): 88dB, DR, S/N: 95dB (MIC-Amp=0dB)
•
Wind-noise Reduction Filter
•
Stereo Separation Emphasis
•
Programmable EQ
2. Playback Function
•
Digital De-emphasis Filter (tc=50/15(s, fs=32kHz, 44.1kHz, 48kHz)
•
Bass Boost
•
Soft Mute
•
Digital Volume (+12dB ( (115.0dB, 0.5dB Step, Mute)
•
Digital ALC (Automatic Level Control)
(+36dB
∼ −54dB,
0.375dB Step, Mute)
•
Stereo Separation Emphasis
•
Programmable EQ
•
Stereo Line Output
- Performance: S/(N+D): 88dB, S/N: 92dB
•
Stereo Headphone-Amp
- S/(N+D): 70dB@7.5mW, S/N: 90dB
- Output Power: 70mW@16Ω (HVDD=5V), 62mW@16Ω (HVDD=3.3V)
- Pop Noise Free at Power ON/OFF
•
Analog Mixing: 4 Stereo Input
3. Power Management
4. Master Clock:
(1) PLL Mode
•
Frequencies:
- MCKI pin: 11.2896MHz, 12MHz, 12.288MHz, 13MHz, 13.5MHz,
19.2MHz, 24MHz, 26MHz, 27MHz
- LRCK pin: 1fs
- BICK pin: 32fs or 64fs
(2) External Clock Mode
•
Frequencies: 256fs, 512fs or 1024fs (MCKI pin)
5. Output Master Clock Frequencies: 32fs/64fs/128fs/256fs
6. Sampling Rate:
•
PLL Slave Mode (LRCK pin): 7.35kHz
∼
48kHz
•
PLL Slave Mode (BICK pin): 7.35kHz
∼
48kHz
•
PLL Slave Mode (MCKI pin):
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
MS0605-E-00
-1-
2007/06
AKM [ ASAHI KASEI MICROSYSTEMS ]
