AK4425A AKM [Asahi Kasei Microsystems], AK4425A Datasheet - Page 24

• Manufacturer Part Number: AK4425A
• Description: 192kHz 24-Bit Stereo ?? DAC with 2Vrms Output
• Manufacturer: AKM [Asahi Kasei Microsystems]

[AK4425A]
1. Grounding and Power Supply Decoupling
VDD and AVDD are supplied from the analog supply and should be separated from the system digital supply.
Decoupling capacitors, especially 0.1μF ceramic capacitors for high frequency bypass, should be placed as near to VDD
and AVDD as possible. The VSS1 and VSS2 must be connected to the same analog ground plane. Power-up sequence
between VDD and AVDD is not critical.
2. Analog Outputs
The analog outputs are single-ended and centered around the VSS (ground) voltage. The output signal range is typically
2.2Vrms (typ @AVDD=5V). The internal switched-capacitor filter (SCF) and continuous-time filter (CTF) attenuate the
st
noise generated by the delta-sigma modulator beyond the audio passband. Using single a 1
-order LPF
(Figure
16) can
reduce noise beyond the audio passband.
AK4425
470
Analog
AOUT
Out
2.2Vrms (typ)
2.2nF
(fc = 154kHz, gain = -0.28dB @ 40kHz, gain = -1.04dB @ 80kHz)
st
Figure 16. External 1
order LPF Circuit Example
MS1127-E-01
2011/03
- 24 -