參數資料
型號： ADS8365IPAGRG4
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類比數位轉換器
文件頁數： 26/33頁
文件大?。?/td> 441K
代理商： ADS8365IPAGRG4
www.ti.com
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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相關代理商/技術參數
參數描述
ADS8365M-EVM 功能描述:數據轉換 IC 開發(fā)工具 ADC CONVERTER RoHS:否 制造商:Texas Instruments 產品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
ADS8370 制造商:BB 制造商全稱:BB 功能描述:16-BIT, 600-kHz, PSEUDO-DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE AND REFERENCE
ADS8370EVM 功能描述:數據轉換 IC 開發(fā)工具 ADS8370 Eval Mod RoHS:否 制造商:Texas Instruments 產品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
ADS8370I 制造商:BB 制造商全稱:BB 功能描述:16-BIT, 600-kHz, PSEUDO-DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE AND REFERENCE
ADS8370IB 制造商:BB 制造商全稱:BB 功能描述:16-BIT, 600-kHz, PSEUDO-DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE AND REFERENCE
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