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參數(shù)資料
| 型號(hào)： | ADC128S022 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 8-Channel, 50 kSPS to 200 kSPS, 12-Bit A/D Converter |
| 中文描述： | 8通道，50 kSPS的200 kSPS的，12位A / D轉(zhuǎn)換器 |
| 文件頁數(shù)： | 17/18頁 |
| 文件大?。?/td> | 848K |
| 代理商： | ADC128S022 |
2.0 Applications Information
(Continued)
close to the ADC output pin as practical. This will limit the
charge and discharge current of the output capacitance and
improve noise performance. Since the series resistor and
the load capacitor form a low frequency pole, verify the
signal integrity once the series resistor has been added.
2.3 Layout and Grounding
Capacitive coupling between the noisy digital circuitry and
the sensitive analog circuitry can lead to poor performance.
The solution is to keep the analog circuitry separated from
the digital circuitry and the clock line as short as possible.
Digital circuits create substantial supply and ground current
transients. The logic noise generated could have significant
impact upon system noise performance. To avoid perfor-
mance degradation of theADC128S022 due to supply noise,
do not use the same supply for theADC128S022 that is used
for digital logic.
Generally, analog and digital lines should cross each other at
90 to avoid crosstalk. However, to maximize accuracy in
high resolution systems, avoid crossing analog and digital
lines altogether. It is important to keep clock lines as short as
possible and isolated from ALL other lines, including other
digital lines. In addition, the clock line should also be treated
as a transmission line and be properly terminated.
The analog input should be isolated from noisy signal traces
to avoid coupling of spurious signals into the input. Any
external component (e.g., a filter capacitor) connected be-
tween the converter’s input pins and ground or to the refer-
ence input pin and ground should be connected to a very
clean point in the ground plane.
We recommend the use of a single, uniform ground plane
and the use of split power planes. The power planes should
be located within the same board layer. All analog circuitry
(input amplifiers, filters, reference components, etc.) should
be placed over the analog power plane. All digital circuitry
and I/O lines should be placed over the digital power plane.
Furthermore, all components in the reference circuitry and
the input signal chain that are connected to ground should
be connected together with short traces and enter the analog
ground plane at a single, quiet point.
A
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADC128S022CIMT | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADC128S022CIMT/NOPB | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8CH,50KSPS-200KSPS, 12B ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADC128S022CIMT-NOPB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:8-Channel, 50 kSPS to 200 kSPS, 12-Bit A/D Converter |
| ADC128S022CIMTX | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADC128S022CIMTX/NOPB | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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