AK4528_04 Datasheet, PDF (27/29 Pages) Asahi Kasei Microsystems – High Performance 24Bit 96kHz Audio CODEC

ASAHI KASEI
[AK4528]
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 14. 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 15. External low cost 1st order LPF Example (using dual supply op-amp)
„ Peripheral I/F Example
The digital inputs of the AK4528 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
AK4528
DSP
3 or 5V Digital
Control signal
uP &
Others
Figure 16. Power supply connection example
MS0011-E-01
- 27 -
2004/01