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AK4561 Datasheet, PDF (1/48 Pages) Asahi Kasei Microsystems – 16bit CODEC with built-in ALC and MIC/HP-Amp | |||
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ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
- Preliminary -
AK4561
16bit CODEC with built-in ALC and MIC/HP-Amp
GENERAL DESCRIPTION
AK4561 is a 16bit stereo CODEC with a built-in Microphone-Amp, Headphone-Amp. Input circuits include
Microphone/LINE inputs selector, power supply for microphone, Pre-Amp, HPF-Amp, EQ-Amp and ALC
(Automatic Level Control) circuit, and output circuits include LINEOUT buffer, Analog Volume and
Headphone-Amp. As Multi-Power-Supply-System can be set a suitable power supply voltage in each block,
the AK4561 is compatible with high performance and low power dissipation. The package is a 64pin TQFP,
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 and LINE)
⢠MIC-Amp
- Pre-Amp, EQ-Amp, HPF-Amp for wind-noise
⢠Digital ALC (Automatic Level Control) circuit
⢠FADEIN/FADEOUT
⢠Digital Delay circuit
⢠Digital HPF for offset cancellation (fc=3.7Hz@fs=48kHz)
3. Playback Function
⢠Digital De-emphasis Filter (tc=50/15µs, fs = 32kHz, 44.1kHz and 48kHz)
⢠LINEOUT Buffer: +2dBV
⢠Analog Volume
- 0dB â¼ -50dB, Mute
⢠Headphone-Amp
- Output Level: -5.5dBV@VA=2.8V, RL=55â¦
⢠Monaural Output Buffer
⢠BEEP Signal Input
4. Analog Through Mode
5. Power Management
6. ADC Characteristics (LINEIN â ALC â ADC)
⢠S/(N+D): 78dB, DR=S/N: 86dB
7. DAC Characteristics (DAC â LINEOUT)
⢠S/(N+D): 76dB, DR=S/N: 88dB
8. Master Clock: 256fs/384fs
9. Sampling Rate: 8kHz â¼50kHz
10. Audio Data Interface Format: MSB-First, 2âs compliment (AK4550 Compatible)
⢠ADC: 16bit MSB justified, DAC: 16bit LSB justified
11. Ta = -20 ⼠85°C
12. Power Supply
⢠CODEC, Analog Volume, Headphone-Amp: 2.6 ⼠3.3V (typ. 2.8V)
⢠LINEOUT: 3.8 ⼠5.5V (typ. 4.5V)
⢠MIC-Amp: 2.6 ⼠5.0V (typ. 2.8V)
⢠Digital I/F: 1.8 ⼠3.3V (typ. 2.8V)
13. Power Supply Current
⢠All Circuit Power On: 37mA
14. Package: 64pin TQFP, 0.4mm Pitch
Rev. 0.9
2000/09
-1-
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