ASAHI KASEI
[AK4526A]
AK4526A
High Performance Multi-channel Audio CODEC
GENERAL DESCRIPTION
The AK4526A is a single chip CODEC that includes two channels of ADC and six channels of DAC. The
ADC outputs 20bit data and the DAC accepts up to 24bit input data. The ADC has an enhanced dual bit
architecture with wide dynamic range. The DAC achieves low outband noise and high jitter tolerance by
use of SCF(switched capacitor filter) techniques. An auxiliary digital audio input interface maybe used
instead of the ADC for passing audio data to the primary audio output port. Control may be set directly by
pins or programmed through a separate serial interface.
The AK4526A has a dynamic range of 100dB and is well suited for digital surround for home theater and
car audio. An AC-3 system can be built with a IEC958(SPDIF) receiver such as the AK4110. The
AK4526A is available in a small 44pin LQFP package which will reduce system space.
*AC-3 is a trademark of Dolby Laboratories.
FEATURES
•
2ch ADC with 20bit data output capability
- 64x Oversampling
- Sampling Rate up to 48kHz
- Differential Inputs with single-ended use capability
- S/(N+D): 92dB
- Dynamic Range, S/N: 100dB
- Digital HPF for offset cancellation
- I/F format: MSB justified or I
2
S
•
6ch DAC with 24bit data input capability
- 128x Oversampling
- Sampling Rate up to 96kHz
- Single-Ended Outputs
- 2nd order SCF
- S/(N+D): 90dB
- Dynamic Range: 100dB
- S/N: 100dB, 108dB(Mute)
- I/F format: MSB justified, LSB justified or I
2
S
- Individual attenuation control with 21 levels and 1dB step
•
De-emphasis for 32kHz, 44.1kHz, 48kHz and 96kHz
•
High Jitter Tolerance
•
TTL Level Digital I/F
•
Serial uP I/F for mode setting
•
Master clock: 256fs, 384fs or 512fs for fs=32kHz to 48kHz
128fs, 192fs or 256fs for fs=96kHz
•
Power Supply: 4.5 to 5.5V
•
Small 44pin LQFP
M0037-E-02
-1-
1999/6
AKM [ ASAHI KASEI MICROSYSTEMS ]
