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ADA4930-1YCPZ-R7 датащи(PDF) 16 Page - Analog Devices

номер детали ADA4930-1YCPZ-R7
подробное описание детали  Ultralow Noise Drivers for Low Voltage ADCs
PDF  25 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

ADA4930-1YCPZ-R7 датащи(HTML) 16 Page - Analog Devices

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ADA4930-1/ADA4930-2
Data Sheet
Rev. D | Page 16 of 25
OPERATIONAL DESCRIPTION
DEFINITION OF TERMS
+IN
–IN
+OUT
–OUT
+DIN
–FB
+FB
–DIN
VOCM
RG
RF
RG
VOUT, dm
RL, dm
RF
ADA4930
Figure 42. Circuit Definitions
Differential Voltage
Differential voltagerefersto the difference between two
node voltages. For example, the output differential voltage (or,
equivalently, output differential-modevoltage)is defined as
VOUT, dm = (V+OUT − V−OUT)
where V+OUT and V−OUT refer to the voltages at the +OUTand
−OUT terminals with respect to a common reference.
Common-Mode Voltage
Common-modevoltagerefersto theaverageoftwonodevoltages.
The output common-modevoltageis defined as
VOUT, cm = (V+OUT + V−OUT)/2
Balance
Outputbalanceis a measureof howclosethedifferential signals are
to being equal in amplitudeandoppositein phase. Output balance
is most easily determined by placing a well-matched resistor
divider between thedifferential voltagenodesandcomparing the
magnitudeofthesignal atthedivider midpoint with the magnitude
of the differential signal (seeFigure39). Bythis definition,output
balance is the magnitudeoftheoutput common-mode voltage
divided bythemagnitudeoftheoutput differential mode voltage.
dm
OUT
cm
OUT
V
V
Error
Balance
Output
,
,
=



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