AK4425A AKM [Asahi Kasei Microsystems], AK4425A Datasheet - Page 15

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

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A digital de-emphasis filter is available for 32, 44.1 or 48kHz sampling rates (tc = 50/15µs) and it is enabled or disabled
by DEM0 and DEM1. In case of double speed and quad speed mode, the digital de-emphasis filter is always OFF.
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The internal negative power supply generation circuit
amplifier. It allows the AK4425A to output an audio signal centered at VSS (0V, typ) as shown in
power generation circuit
capacitor is polarized, the positive polarity pin should be connected to the CP and VSS1 pins. This circuit operates by
clocks generated from MCLK. When MCLK stops, the AK4425A is placed in the reset mode automatically and the
analog outputs settle to VSS (0V, typ).
MS1127-E-01
De-emphasis Filter
Analog Output Block
AK4425
(Figure
Table 7. De-emphasis Filter Control (Normal Speed Mode)
VDD
9) needs 1.0uF capacitors (Ca, Cb) with low ESR (Equivalent Series Resistance). If this
AK4425
Figure 9. Negative Power Generation Circuit
Figure 10. Audio Signal Output
CP
AOUTR
(AOUTL)
DEM1
0
0
1
1
Charge
(+)
1uF
Pump
CN
Ca
(Figure
DEM0
0V
- 15 -
VSS1
0
1
0
1
9) provides a negative power supply for the internal 2Vrms
44.1kHz
Cb
48kHz
32kHz
Mode
OFF
(+)
2.2Vrms
1uF
VEE
Negative Power
(default)
Figure
10. The negative
[AK4425A]
2011/03