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AK4565

Low Power 20bit CODEC with built-in ALC

Asahi Kasei Microdevices 

ASAHI KASEI

[AK4565]

AK4565

Low Power 20bit CODEC with built-in ALC

GENERAL DESCRIPTION

The AK4565 is a low power voltage, 20bit CODEC. The recording feature includes four stereo inputs

selector which switches among microphone and line inputs etc. And the input PGA has an ALC function,

making it suitable for microphone application. The AK4565 has a dedicated power supply pin for digital

I/F, which can support I/O level down to 1.5V. The AK4565 can be powered-down partly and is suitable

for portable application.

FEATURES

1. Resolution: 20bits

2. Recording Functions

• Four Stereo Inputs Selector

• Input PGA (Programmable Gain Amplifier) with ALC (Automatic Level Control)

• FADEIN / FADEOUT

• Digital HPF for DC-offset cancellation (fc=3.7Hz@fs=48kHz)

3. Playback Function

• Digital De-emphasis Filter (tc = 50/15µs, fs=32k, 44.1k and 48kHz)

4. Power Management

5. CODEC

• Single-ended Inputs/Outputs

• Input / Output Level: 1.5Vpp@VREF=2.5V (= 0.6 x VREF)

• S/(N+D): 83dB(ADC), 86dB(DAC) @VREF=2.5V

• DR, S/N: 87dB(ADC), 91dB(DAC) @VREF=2.5V

6. Master Clock: 256fs/384fs

7. Sampling Rate: 8kHz ∼ 50kHz

8. Audio Data Interface Format: MSB-First, 2’s compliment

• ADC: 20bit MSB justified, I2S

• DAC: 20bit MSB justified, 16/20bit LSB justified, I2S

9. µP Interface: 4-wire

10.Power Supply

• CODEC, IPGA: 2.3 ∼ 3.6V (typ.2.5V)

• Digital I/F: 1.5 ∼ 3.6V(typ.2.5V)

11.Power Supply Current

• ALL Power ON: 12.5mA

• IPGA + ADC: 8mA

• DAC: 5.5mA

12. Ta = - 40 ∼ 85 º C

13. Package: 28pin VSOP

14. AK4563A pin-compatible

MS0132-E-01

-1-

2003/05

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