ASAHI KASEI
[AK4564]
AK4564
16bit CODEC with built-in ALC and MIC/HP/SPK-Amp
GENERAL DESCRIPTION
The AK4564 is a 16bit stereo CODEC with a built-in Microphone-Amp, Headphone-Amp and Speaker-Amp.
AK4564 has new recording features, a digital equalizer for microphone inputs and a digital ALC (Automatic
Level Control). The playback features also include LINEOUT-Amp, digital volume, Headphone-Amp and
Speaker-Amp. The AK4564 suits a portable application with a built-in LCD and etc. The AK4564 is housed in a
space-saving 48pin LQFP package.
FEATURE
1. Resolution: 16bits
2. Recording Function:
•
4-Input Selector (Internal MIC, External MIC, LINE x 2)
•
Pre-Amp
•
Digital EQ/HPF/LPF
•
Digital ALC (Automatic Level Control) circuit
•
FADEIN / FADEOUT
•
Digital HPF for offset cancellation (fc=3.7Hz@fs=48kHz)
•
Enable mixing of BEEP signal
3. Playback Function
•
Digital De-emphasis Filter (tc = 50/15
µ
s, fs = 32kHz, 44.1kHz and 48kHz)
•
LINEOUT-Amp
•
Digital Volume: 0dB
∼
- 65.25dB, Mute
•
Headphone-Amp
- Po: 5.3mW @ 16
Ω
(AVDD = 2.8V)
•
Speaker-Amp with built-in ALC
- BTL Output
- Po: 80mW @ 8
Ω
•
Enable mixing of BEEP signal
4. Power Management
5. ADC characteristics (LIN
→
ADC)
•
S/(N+D): 87dB, DR=S/N: 90dB
6. DAC characteristics (DAC
→
LINEOUT-Amp)
•
S/(N+D): 82dB, DR=S/N: 88dB
7. Master Clock: 256fs/384fs
8. Sampling Rate: 8kHz
∼50kHz
9. Audio Data Interface Format: MSB-First, 2’s compliment
•
ADC, DAC: 16bit MSB justified, 16bit LSB justified, I
2
S
10. Ta = -20
∼
85
°C
11. Power Supply Voltage
•
CODEC, Speaker-Amp: 2.6
∼
3.6V
•
MIC/Headphone/LINEOUT-Amp: 2.6
∼
5.5V
12. Power Supply Current
•
All Power On: 30.5mA
13. Package: 48pin LQFP, 0.5mm Pitch
MS0140-E-01
-1-
2002/07
AKM [ ASAHI KASEI MICROSYSTEMS ]
