- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄17057 > EVAL-AD7193EBZ (Analog Devices Inc)EVAL BOARD FOR AD7193 PDF資料下載
參數(shù)資料
| 型號： | EVAL-AD7193EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 50/57頁 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR AD7193 |
| 設(shè)計(jì)資源： | EVAL-AD7193 Schematic AD7193 Gerber Files |
| 標(biāo)準(zhǔn)包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 24 |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 工作溫度： | -40°C ~ 105°C |
| 已用 IC / 零件： | AD7193 |
| 已供物品： | 板，線纜 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁當(dāng)前第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁
Data Sheet
AD7193
Rev. D | Page 53 of 56
GROUNDING AND LAYOUT
Because the analog inputs and reference inputs are differential,
most of the voltages in the analog modulator are common-mode
voltages. The high common-mode rejection of the part removes
common-mode noise on these inputs. The analog and digital
supplies to the AD7193 are independent and separately pinned
out to minimize coupling between the analog and digital sections
of the device. The digital filter provides rejection of broadband
noise on the power supplies, except at integer multiples of the
modulator sampling frequency.
Connect an RC filter to each analog input pin to provide rejection
at the modulator sampling frequency. A 100 Ω resistor in series
with each analog input, a 0.1 F capacitor between the analog
input pins, and a 0.01 F capacitor from each analog input to
AGND are advised.
The digital filter also removes noise from the analog and
reference inputs provided that these noise sources do not
saturate the analog modulator. As a result, the AD7193 is
more immune to noise interference than a conventional high
resolution converter. However, because the resolution of the
AD7193 is so high and the noise levels from the converter so
low, care must be taken with regard to grounding and layout.
The printed circuit board (PCB) that houses the ADC must be
designed so 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 easily separated. A minimum
etch technique is generally best for ground planes because it
gives the best shielding.
Although the AD7193 has separate pins for analog and digital
ground, the AGND and DGND pins are tied together internally
via the substrate. Therefore, the user must not tie these two pins
to separate ground planes unless the ground planes are connected
together near the AD7193.
In systems in which the AGND and DGND are connected some-
where else in the system (that is, the power supply of the system),
they should not be connected again at the AD7193 because a
ground loop results. In these situations, it is recommended that
the ground pins of the AD7193 be tied to the AGND plane.
In any layout, the user must keep in mind the flow of currents
in the system, ensuring that the paths for all currents are as close as
possible to the paths the currents took to reach their destinations.
Avoid forcing digital currents to flow through the AGND.
Avoid running digital lines under the device because this couples
noise onto the die and allows the analog ground plane to run
under the AD7193 to prevent noise coupling. The power supply
lines to the AD7193 must use as wide a trace as possible to
provide low impedance paths and reduce the effects of glitches
on the power supply line. Shield fast switching signals like clocks
with digital ground to prevent radiating noise to other sections
of the board and never run clock signals near the analog inputs.
Avoid crossover of digital and analog signals. Run traces on
opposite sides of the board at right angles to each other. This
reduces the effects of feedthrough through the board. A microstrip
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, whereas signals are
placed on the solder side.
Good decoupling is important when using high resolution ADCs.
Decouple all analog supplies with 10 F tantalum capacitors in
parallel with 0.1 F capacitors to AGND. To achieve the best
results from these decoupling components, place them as close
as possible to the device, ideally right up against the device.
Decouple all logic chips with 0.1 F ceramic capacitors to DGND.
In systems in which a common supply voltage is used to drive
both the AVDD and DVDD of the AD7193, it is recommended
that the system AVDD supply be used. For this supply, place the
recommended analog supply decoupling capacitors between the
AVDD pin of the AD7193 and AGND and the recommended
digital supply decoupling capacitor between the DVDD pin of the
AD7193 and DGND.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TRK-MPC5634M | TRAK 5634M 144PN R2.1 |
| REF191GSZ | IC VREF SERIES PREC 2.048V 8SOIC |
| DEMO56F8014-EE | BOARD DEMO FOR 56F8014 |
| 0210490222 | CABLE JUMPER 1.25MM .152M 16POS |
| EVAL-AD7795EBZ | BOARD EVAL FOR AD7795 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-AD7194EBZ | 功能描述:EVAL BOARD FOR AD7194 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7195EBZ | 功能描述:BOARD EVAL FOR AD7195 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電信，線路接口單元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板，電源，線纜，CD 其它名稱:82EBV2081 |
| EVAL-AD7262EDZ | 功能描述:BOARD EVAL CONTROL AD7262 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7264EDZ | 功能描述:BOARD EVALUATION FOR AD7264 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7265CB | 制造商:AD 制造商全稱:Analog Devices 功能描述:Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。