AK4340_06 AKM [Asahi Kasei Microsystems], AK4340_06 Datasheet - Page 21

• Manufacturer Part Number: AK4340_06
• Description: 192kHz 24-Bit Stereo ?? DAC with 2Vrms Output
• Manufacturer: AKM [Asahi Kasei Microsystems]

ASAHI KASEI
[AK4340]
1. Grounding and Power Supply Decoupling
VDD, HVEE and VSS are supplied from analog supply and should be separated from system digital supply. Decoupling
capacitor, especially 0.1µF ceramic capacitor for high frequency should be placed as near to VDD and HVEE as possible.
The differential Voltage between VDD and VSS pins set the analog output range.
Power-up sequence between VDD and HVEE is not critical.
2. Analog Outputs
The analog outputs are single-ended and centered around the ground (VSS). The output signal range is typically 2Vrms
(@VDD=5V & GAIN pin = “L”). The phase of the analog outputs can be inverted channel independently by INVL/INVR
bits. The internal switched capacitor filter (SCF) and continuous time filter (CTF) attenuate the noise generated by the
delta-sigma modulator beyond the audio passband. If the noise generated by the delta-sigma modulator beyond the audio
st
band would be the problem, the 1
order filter is required. (See Figure 17)
The output voltage is a positive full scale for 7FFFFFH (@24bit) and a negative full scale for 800000H (@24bit). The
ideal output is 0V(VSS) for 000000H (@24bit).
470
Analog
AOUT
Out
2.2n
st
Figure 17. External 1
order LPF Circuit Example
(fc = 154kHz, gain = -0.28dB @ 40kHz, gain = -1.04dB @ 80kHz)
MS0501-E-00
2006/04
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