參數(shù)資料
型號(hào)： AK4345
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： 100dB 96kHz 24-Bit Stereo 3.3V ツヒ DAC with DIT
中文描述： 100dB的96kHz的24位立體聲3.3ツヒDAC，具有動(dòng)態(tài)網(wǎng)
文件頁(yè)數(shù)： 24/26頁(yè)
文件大?。?/td> 540K
代理商： AK4345
[AK4345]
1. Grounding and Power Supply Decoupling
The AK4345 requires careful attention for power supply and grounding arrangements. VDD is usually supplied from the
analog supply in the system. System analog ground and digital ground should be connected together near to where the
supplies are brought onto the printed circuit board. Decoupling capacitors should be as near to the AK4345 as possible,
with the small value ceramic capacitor being the closest.
2. Voltage Reference
The differential Voltage between VDD and VSS sets the analog output range. VCOM is used as a common voltage of the
analog signal. VCOM pin is a signal ground of this chip. An electrolytic capacitor about 4.7
μ
F should be attached
between VCOM pin and VSS. No load current may be drawn from VCOM pin. Especially, the ceramic capacitor should
be connected to this pin as near as possible.
3. Analog Outputs
The analog outputs are single-ended and centered around the VCOM voltage (0.5
×
VDD). The output signal range is
typically 2.8Vpp (typ@VDD=3.3V). The internal switched-capacitor filter and continuous-time filter attenuate the noise
generated by the delta-sigma modulator beyond the audio passband. The output voltage is a positive full scale for
7FFFFFH (@24bit) and a negative full scale for 800000H (@24bit). The ideal output is VCOM voltage (0.5
×
VDD) for
000000H (@24bit).
DC offsets on analog outputs are eliminated by AC coupling since analog outputs have DC offsets of VCOM + a few mV.
Figure 24 shows an example of the external LPF with 2.8Vpp (1Vrms) output.
LOUT / ROUT
10u
220
1nF
AK4345
22k
2.8Vpp (1Vrms)
Analog
Out
fc=723.4kHz, g=-0.013dB at 40kHz
Figure 24. External 1
st
order LPF Circuit Example
MS0635-E-00
2007/06
- 24 -
相關(guān)PDF資料
PDF描述
AK4345ET 100dB 96kHz 24-Bit Stereo 3.3V ツヒ DAC with DIT
AK4346 3.3V 192kHz 24-Bit 6-Channel DAC
AK4346EF 3.3V 192kHz 24-Bit 6-Channel DAC
AK4346VF 3.3V 192kHz 24-Bit 6-Channel DAC
AK4348 3.3V 192kHz 24-Bit 8-Channel DAC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4345_10 制造商:AKM 制造商全稱:AKM 功能描述:100dB 96kHz 24-Bit Stereo 3.3V ΔΣ DAC with DIT
AK4345ET 制造商:AKM 制造商全稱:AKM 功能描述:100dB 96kHz 24-Bit Stereo 3.3V ΔΣ DAC with DIT
AK4346 制造商:AKM 制造商全稱:AKM 功能描述:3.3V 192kHz 24-Bit 6-Channel DAC
AK4346EF 制造商:AKM 制造商全稱:AKM 功能描述:3.3V 192kHz 24-Bit 6-Channel DAC
AK4346VF 制造商:AKM 制造商全稱:AKM 功能描述:3.3V 192kHz 24-Bit 6-Channel DAC
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