ASAHI KASEI
[AK4560A]
AK4560A
16bit CODEC with ALC and MIC/HP/SPK-Amps
GENERAL DESCRIPTION
AK4560A is a 16bit stereo CODEC with a built-in Microphone-Amp, Headphone-Amp and Speaker-Amp. Input
circuits include Microphone/LINE inputs selector, power supply for microphone, Pre-Amp, HPF-Amp, EQ-Amp
and ALC (Auto Level Control) circuit, and output circuits include LINEOUT buffer, Analog Volume,
Headphone-Amp and Speaker-Amp, therefore the AK4560A suits a portable application with a built-in LCD
and etc. As Multi-Power-Supply-System can be set a suitable power supply voltage in each block, the
AK4560A is compatible with high performance and low power dissipation. The package is a 64pin LQFP,
therefore, a new system can be a smaller board area than a current system is composed of 2 or 3 chips.
FEATURE
1. Resolution: 16bits
2. Recording Function:
•
3-Input Selector (Internal MIC, External MIC, LINE)
•
Pre-Amp/EQ-Amp
•
HPF-Amp for wind-noise
•
Digital ALC (Auto Level Control) circuit
•
FADEIN / FADEOUT
•
Digital HPF for offset cancellation (fc=3.7Hz@fs=48kHz)
3. Playback Function
•
Digital De-emphasis Filter (tc = 50/15us, fs = 32kHz, 44.1kHz and 48kHz)
•
LINEOUT Buffer: +2dBV
•
Analog Volume
- 0dB
∼
-50dB, Mute
•
Headphone-Amp
- Output Level: -3.4dBV, THD+N = 1%
•
Speaker-Amp with a built-in Digital ALC circuit
- BTL Output
- Output Power: 80mW @ 8Ω
•
BEEP and Shutter Signal Inputs
4. Analog Through Mode
5. Power Management
6. ADC Characteristics (LIN
→
ALC1
→
ADMIX
→
ADC)
•
S/(N+D): 80dB, DR=S/N: 86dB
7. DAC Characteristics (DAC
→
LINEOUT)
•
S/(N+D): 82dB, DR=S/N: 88dB
8. Master Clock: 256fs/384fs
9. Sampling Rate: 8kHz
∼
50kHz
10. Audio Data Interface Format: MSB-First, 2’s compliment (AK4518/AK4550 Compatible)
•
ADC: 16bit MSB justified, DAC: 16bit LSB justified
11. Ta = -20
∼
85°C
12. Power Supply
•
CODEC, Analog Volume: 2.6
∼
3.3V (typ. 2.8V)
•
LINEOUT, Headphone-Amp: 3.8
∼
5.5V (typ. 4.5V)
•
MIC-Amp: 2.6
∼
5.5V (typ. 3.9V)
•
Speaker-Amp: 3.8
∼
4.3V (typ. 4.0V)
13. Power Supply Current
•
All Circuits Power-up: 32.5mA
14. Package: 64pin LQFP, 0.5mm Pitch
MS0028-E-00
-1-
2000/05
AKM [ ASAHI KASEI MICROSYSTEMS ]
