AK4524 Datasheet, PDF (29/31 Pages) Asahi Kasei Microsystems – 24BIT 96KHZ AUDIO CODEC

ASAHI KASEI
[AK4524]
AOUT-
AOUT+
4.7k
4.7k
R1
470p
3300p
4.7k
4.7k
+Vop
R1
-
+
470p -Vop
Analog
Out
When R1=200ohm
fc=93.2kHz, Q=0.712, g=-0.1dB at 40kHz
When R1=180ohm
fc=98.2kHz, Q=0.681, g=-0.2dB at 40kHz
Figure 13. External 2nd order LPF Example (using dual supply op-amp)
180p
AOUT-
AOUT+
4.7k
4.7k
4.7k
4.7k
+Vop
-
Analog
+
Out
180p -Vop
fc=188kHz
Figure 14. External low cost 1st order LPF Example (using dual supply op-amp)
n Peripheral I/F Example
The digital inputs of the AK4524 are TTL inputs and can accept the signal of device with a nominal 3V supply. The digital
output can interface with the peripheral device with a nominal 3V supply when the VT supply operates at a nominal 3V
supply.
5V Analog
3V Digital
Analog Digital I/F
Audio signal
AK4524
DSP
3 or 5V Digital
Control signal
uP &
Others
Figure 15. Power supply connection example
M0050-E-01
- 29 -
1999/5