參數(shù)資料
型號(hào)： EVAL-AD7793EBZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 21/33頁(yè)
文件大?。?/td> 0K
描述： BOARD EVALUATION FOR AD7793
標(biāo)準(zhǔn)包裝： 1
ADC 的數(shù)量： 1
位數(shù)： 24
采樣率（每秒）： 470
數(shù)據(jù)接口： 串行
輸入范圍： 0 ~ 5 V
在以下條件下的電源（標(biāo)準(zhǔn)）： 2.5mW @ 470SPS
工作溫度： -40°C ~ 105°C
已用 IC / 零件： AD7793
已供物品： 板，纜線，CD
相關(guān)產(chǎn)品： AD7793BRU-ND - IC ADC 24BIT 3CH LP 16-TSSOP
AD7793BRUZ-REEL-ND - IC ADC 24BIT 3CH LP 16-TSSOP
AD7793BRUZ-ND - IC ADC 24BIT SIG-DEL 3CH 16TSSOP
AD7792/AD7793
Rev. B | Page 27 of 32
The ground planes of the AD7792/AD7793 should be allowed
to run under the AD7792/AD7793 to prevent noise coupling.
The power supply lines to the AD7792/AD7793 should use as
wide a trace as possible to provide low impedance paths and
reduce the effects of glitches on the power supply line. Fast
switching signals such as 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. This reduces the effects of feedthrough through the
board. A microstrip technique is by far the best, but it is not
always possible with a double-sided board. In this technique,
the component side of the board is dedicated to ground planes,
and signals are placed on the solder side.
Good decoupling is important when using high resolution
ADCs. AVDD should be decoupled with 10 μF tantalum in
parallel with 0.1 μF capacitors to GND. DVDD should be
decoupled with 10 μF tantalum in parallel with 0.1 μF
capacitors to the system’s DGND plane, with the system’s
AGND to DGND connection being close to the
AD7792/AD7793.
To achieve the best from these decoupling components, they
should be placed as close as possible to the device, ideally right
up against the device. All logic chips should be decoupled with
0.1 μF ceramic capacitors to DGND.
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