參數(shù)資料
型號(hào)： AD7911AUJ-R2
廠商： ANALOG DEVICES INC
元件分類： ADC
英文描述： 2-Channel, 2.35 V to 5.25 V 250 kSPS, 10-/12-Bit ADCs
中文描述： 2-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8
封裝： MO-193BA, TSOT-23
文件頁(yè)數(shù)： 24/28頁(yè)
文件大?。?/td> 312K
代理商： AD7911AUJ-R2
AD7911/AD7921
APPLICATION HINTS
GROUNDING AND LAYOUT
The printed circuit board that houses the AD7911/AD7921
should be designed such that the analog and digital sections are
separated and confined to certain areas of the board. This
facilitates the use of ground planes that can be separated easily.
A minimum etch technique is generally best for ground planes,
because it gives the best shielding. Digital and analog ground
planes should be joined at only one place. If the AD7911/
AD7921 is in a system where multiple devices require an
AGND-to-DGND connection, the connection should still be
made at one point only, a star ground point that should be
established as close as possible to the AD7911/AD7921.
Rev. 0 | Page 24 of 28
Avoid running digital lines under the device, because these
couple noise onto the die. The analog ground plane should be
allowed to run under the AD7911/AD7921 to avoid noise
coupling. The power supply lines to the AD7911/AD7921
should use as large a trace as possible to provide low impedance
paths and reduce the effects of glitches on the power supply line.
Fast-switching signals like clocks should be shielded with digital
ground to avoid radiating noise to other sections of the board,
and clock signals should never be run near the analog inputs.
Avoid crossover of digital and analog signals. Traces on opposite
sides of the board should run at right angles to each other to
reduce the effects of feedthrough through the board. A micro-
strip technique is by far the best, but is not always possible with
a double-sided board. In this technique, the component side of
the board is dedicated to ground planes, while signals are placed
on the solder side.
Good decoupling is also very important. The analog supply
should be decoupled with 10 μF tantalum in parallel with 0.1 μF
capacitors to AGND. To achieve the best performance from
these decoupling components, the user should endeavor to keep
the distance between the decoupling capacitor and the V
DD
and
GND pins to a minimum with short track lengths connecting
the respective pins.
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7911AUJ-REEL7 制造商:Analog Devices 功能描述:ADC Single SAR 250ksps 10-bit Serial 8-Pin TSOT T/R
AD7911AUJZ-R2 功能描述:IC ADC 10BIT 250KSPS TSOT23-8 RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494
AD7911AUJZ-REEL7 功能描述:IC ADC 10BIT 250KSPS TSOT23-8 RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494
AD7912 制造商:AD 制造商全稱:Analog Devices 功能描述:2-Channel, 2.35 V to 5.25 V, 1 MSPS, 10-/12-Bit ADCs
AD7912ARM 制造商:Analog Devices 功能描述:ADC Single SAR 1Msps 10-bit Serial 8-Pin MSOP 制造商:Rochester Electronics LLC 功能描述:DUAL 10-BIT, 1MSPS, ADC I.C - Bulk 制造商:Analog Devices 功能描述:10BIT ADC DUAL SMD 7912 MSOP8
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