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參數(shù)資料
| 型號(hào)： | AK4394VF |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | ADVANCED MULTI-BIT 192KHZ 24-BIT DAC |
| 中文描述： | 先進(jìn)的多位192kHz的24位DAC |
| 文件頁數(shù)： | 23/26頁 |
| 文件大?。?/td> | 299K |
| 代理商： | AK4394VF |
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ASAHI KASEI
[AK4394]
M0081-E-00
1999/11
- 23 -
1. Grounding and Power Supply Decoupling
To minimize coupling by digital noise, decoupling capacitors should be connected to AVDD and DVDD, respectively.
AVDD is supplied from analog supply in system and DVDD is supplied from digital supply in system. If AVDD and
DVDD are supplied separately, the power up sequence is not critical.
AVSS, BVSS and DVSS must be connected
to analog ground plane.
System analog ground and digital ground should be connected together near to where the
supplies are brought onto the printed circuit board. Decoupling capacitors for high frequency should be placed as near as
possible.
2. Voltage Reference
The differential Voltage between VREFH and VREFL set the analog output range. VREFH pin is normally connected to
AVDD and VREFL pin is normally connected to AVSS. VREFH and VREFL should be connected with a 0.1μF ceramic
capacitor. VCOM is a signal ground of this chip. An electrolytic capacitor 10μF parallel with a 0.1μF ceramic capacitor
attached to VCOM pin eliminates the effects of high frequency noise. No load current may be drawn from VCOM pin. All
signals, especially clocks, should be kept away from the VREFH, VREFL and VCOM pins in order to avoid unwanted
coupling into the AK4394.
3. Analog Outputs
The analog outputs are full differential outputs and 2.4Vpp (typ@VREF=5V) centered around VCOM. The differential
outputs are summed externally, V
AOUT
= (AOUT+) - (AOUT-) between AOUT+ and AOUT-. If the summing gain is 1, the
output range is 4.8Vpp (typ@VREF=5V). The bias voltage of the external summing circuit is supplied externally. The
input data format is 2's complement. The output voltage (V
AOUT
) is a positive full scale for 7FFFFFH (@24bit) and a
negative full scale for 800000H (@24bit). The ideal V
AOUT
is 0V for 000000H(@24bit).
The internal switched-capacitor filters attenuate the noise generated by the delta-sigma modulator beyond the audio
passband.
Figure 12 shows an example of external LPF circuit summing the differential outputs by an op-amp.
Figure 13 shows an example of differential outputs and LPF circuit example by three op-amps.
1k
1k
1k
1k
1k
1k
1n
+Vop
1n
-Vop
AOUT-
AOUT+
3.3n
Analog
Out
AK4394
Figure 12. External LPF Circuit Example 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4395 | ADVANCED MULTI-BIT 192KHZ 24-BIT DAC |
| AK4395VF | ADVANCED MULTI-BIT 192KHZ 24-BIT DAC |
| AK4396 | Advanced Multi-Bit 192kHz 24-Bit ツヒ DAC |
| AK4396VF | Advanced Multi-Bit 192kHz 24-Bit ツヒ DAC |
| AK4397 | High Performance Premium 32-Bit DAC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4395 | 制造商:AKM 制造商全稱:AKM 功能描述:EVALUATION BOARD REV.C FOR AK4395 |
| AK4395VF | 制造商:AKM 制造商全稱:AKM 功能描述:ADVANCED MULTI-BIT 192KHZ 24-BIT DAC |
| AK4395VF-E2 | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: |
| AK4395VFP | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:ADVANCED MULTI-BIT 192KHZ 24-BIT DAC |
| AK4395VFP-E2 | 功能描述:IC DAC 24BIT STEREO 28VSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:2,400 系列:- 設(shè)置時(shí)間:- 位數(shù):18 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:3 電壓電源:模擬和數(shù)字 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:36-TFBGA 供應(yīng)商設(shè)備封裝:36-TFBGA 包裝:帶卷 (TR) 輸出數(shù)目和類型:* 采樣率（每秒）:* |
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