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參數(shù)資料
| 型號： | ADS8365 |
| 英文描述： | 16-Bit, 250kSPS, 6-Channel, Simultaneous Sampling SAR ANALOG-TO-DIGITAL CONVERTERS |
| 中文描述： | 16位，AD7691的6通道同步采樣SAR類比數(shù)位轉(zhuǎn)換器 |
| 文件頁數(shù)： | 26/33頁 |
| 文件大?。?/td> | 441K |
| 代理商： | ADS8365 |
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LAYOUT
For optimum performance, care should be taken with
the physical layout of the ADS8365 circuitry. This
recommendation is particularly true if the CLK input
is approaching the maximum throughput rate.
GROUNDING
The AGND pins should be connected to a clean
ground point. In all cases, this point should be the
analog ground. Avoid connections that are too close
to the grounding point of a microcontroller or digital
signal processor. If required, run a ground trace
directly from the converter to the power-supply entry
point. The ideal layout includes an analog ground
plane dedicated to the converter and associated
analog circuitry. Three signal ground pins (SGND)
are the input signal grounds that are on the same
potential as analog ground.
ADS8365
SBAS362A–AUGUST 2006–REVISED SEPTEMBER 2006
capacitor and a 5
or 10
series resistor may be
used to low-pass filter a noisy supply. On average,
the ADS8365 draws very little current from an
external reference because the reference voltage is
internally buffered. A bypass capacitor of 0.1
μ
F and
10
μ
F
are
suggested
when
reference (tie pin 61 directly to pin 62).
using
the
internal
The basic SAR architecture is sensitive to glitches or
sudden changes on the power supply, reference,
ground connections, and digital inputs that occur just
prior to latching the output of the analog comparator.
Thus, driving any single conversion for an
n
-bit SAR
converter, there are
n
windows in which large
external transient voltages can affect the conversion
result. Such glitches might originate from switching
power supplies, nearby digital logic, or high-power
devices. The degree of error in the digital output
depends on the reference voltage, layout, and the
exact timing of the external event. Their error can
change if the external event changes in time with
respect to the CLK input.
With this information in mind, power to the ADS8365
should be clean and well-bypassed. A 0.1
μ
F ceramic
bypass capacitor should be placed as close to the
device as possible. In addition, a 1
μ
F to 10
μ
F
capacitor is recommended. If needed, an even larger
26
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS8365IPAG | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16B 250kSPS 6Ch Simu Sampling SAR 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 |
| ADS8365IPAGG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16B 250kSPS 6Ch Simu Sampling SAR 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 |
| ADS8365IPAGG-4 | 制造商:Texas Instruments 功能描述:IC, SM 16-BIT ADC 6CH SAR |
| ADS8365IPAGR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16 B 250k SPS 6 Ch Smltns Smplg SARADC 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 |
| ADS8365IPAGRG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16B 250kSPS 6Ch Simu Sampling SAR 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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