ASAHI KASEI
[AK4631]
AK4631
16-Bit
∆Σ
Mono CODEC with ALC & MIC/SPK-AMP
GENERAL DESCRIPTION
The AK4631 is a 16-bit mono CODEC with Microphone-Amplifier and Speaker-Amplifier. Input circuits
include a Microphone-Amplifier and an ALC (Automatic Level Control) circuit. Output circuits include a
Speaker-Amplifier and Mono Line Output. The AK4631 suits a moving picture of Digital Still Camera and
etc. This speaker-Amplifier supports a Piezo Speaker. The AK4631 is housed in a space-saving 28-pin
QFN package.
FEATURE
1. 16-Bit Delta-Sigma Mono CODEC
2. Recording Function
•
1ch Mono Input
•
1
st
MIC Amplifier: 0dB, 20dB, 26dB or 32dB
•
2
nd
Amplifier with ALC: -8dB
∼
+27.5dB, 0.5dB Step
•
ADC Performance: S/(N+D): 80dB, DR, S/N: 85dB
3. Playback Function
•
Digital Volume: +12dB
∼
-115dB, 0.5dB Step, Mute
•
Mono Line Output Performance: S/(N+D): 85dB, S/N: 93dB
•
Mono Speaker-Amp
- Speaker-Amp Performance: S/(N+D): 50dB, S/N: 90dB (240mW@ 8Ω)
- BTL Output
- ALC (Automatic Level Control) Circuit
- Output Power: 250mW @ 8Ω, SVDD=3.3V
3.0Vrms@SVDD=5V
•
Beep Input
4. Power Management
5. Flexible PLL Mode:
•
Frequencies:
11.2896MHz, 12MHz, 12.288MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)
1fs (FCK pin)
16fs, 32fs or 64fs (BICK pin)
6. EXT Mode:
•
Frequencies: 256fs, 512fs or 1024fs (MCKI pin)
7. Sampling Rate:
•
PLL Slave Mode (FCK pin) : 7.35kHz
~
26kHz
•
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
•
PLL Master Mode:
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
•
EXT Slave Mode:
7.35kHz
~
48kHz (256fs), 7.35kHz
~
26kHz (512fs), 7.35kHz
~
13kHz (1024fs)
8. Output Master Clock Frequency: 256fs
9. Serial
µP
Interface: 3-wire
10. Master / Slave Mode
MS0317-E-01
-1-
2004/11
AKM [ ASAHI KASEI MICROSYSTEMS ]
