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AD8139ACPZ-R2 데이터시트(PDF) 24 Page - Analog Devices

부품명 AD8139ACPZ-R2
상세설명  Low Noise, Rail-to-Rail, Differential ADC Driver
PDF  26 Pages
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제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
Logo AD - Analog Devices

AD8139ACPZ-R2 데이터시트(HTML) 24 Page - Analog Devices

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AD8139
Data Sheet
Rev. C | Page 24 of 26
Because this is a single-ended-to-differential application on a
single supply, the input common-mode voltage swing must be
checked. From Figure 64, β = 0.52, VOCM = 2.4 V, and VICM is
1.1 V p-p swinging about ground. Using Equation 16, VACM is
calculated to be 0.53 V p-p swinging about a baseline of 1.25 V,
and the minimum negative excursion is approximately 1 V.
Exposed Paddle (EP)
The 8-lead SOIC and the 8-lead LFCSP have an exposed paddle
on the bottom of the package. To achieve the specified thermal
resistance, the exposed paddle must be soldered to one of the
PCB planes. The exposed paddle mounting pad should contain
several thermal vias within it to ensure a low thermal path to
the plane.
AD8139
+
–
8
2
1
6
3
4
2.4V
2V p-p
RT
61.9Ω
5
VOCM
200Ω
226Ω
205Ω
205Ω
25Ω
25Ω
0.01µF
0.01µF
0.01µF
AIN
AIN
GND C1
0.1µF
C2
VREF
0.1µF
AVCC
DVCC
5V
3.3V
AD6645
VS
SIGNAL
SOURCE
50Ω
Figure 64. AD8139 Driving AD6645, 14-Bit, 80 MSPS/105 MSPS ADC



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