AD381LH データシートの表示（PDF） - Analog Devices
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AD381LH Datasheet PDF : 8 Pages
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Potentiometer R4 is set for minimum sample/hold offset voltage.
R
V,N
6
VOUT
R6 improves the settling time and circuit stability by adding
phase margin. Bias resistors R7 and R8 insure complete shut-off
of the D-MOS FET switches at TTL logic zero. Pull up resistors
R9 and RIO lower the on resistance of the D-MOS switches.
The SDSOOOD-MOS switch is recommended for its fast transition
R/2
~ NOTCHFREQUENCY=
speed and low on resistance.
C
C
V,N
+5V
RI
3kl"!
Figure 33. High Q Notch Filter
RIO
2.2kl"!
The above notch filter will have a notch of - SS~. To obtain a
+5V
Q of 100 the capacitors should be well matched. Polystyrene,
Teflon or NPO ceramic capacitors and metal-f1lm resistors are
5V,
SAMPLE
recommended. For low frequency fIlter applications resistor
values will be large. The AD381 is well suited for this application
OV \ HOLO 1/6
74LS04
R6
1.5kl"!
cLon
R2
r::
3kl1
I
0)
I
Ln
N
0)
U
VDUT
due to its low input bias current. It is also good for high frequency
fIltering because of its wide gain bandwidth product. This fIlter
is capable of driving Ik!1 loads over a :t JOV output range.
Figure 34 shows a fast sample and hold circuit that can acquire
a sample to 0.01% in 2J.1.(s20 volt swing). The AD381 is well
suited for fast 12-bit sample/hold amplifier circuits. RI and R2
set the circuit gain. R3 is adjusted for minimum ac feedthrough.
OBOUTLINE DIMENSIONS
S Dimensions shown in inches and (mm).
O TO-99 PACKAGE (AD381)
L REF PLANE
tt-t E 0.165 (4.201
TE 0.185 (4.70)
CHDLD
47OpF
Figure 34. Fast Sample/Hold Amplifier
AD381 PIN CONFIGURATION
TOP VIEW
TAB
INY~pRJ~NG(2
)
I 0.370 IS.40O.)305(7.751
==
0.355(S.OO) =
~ ,."J".~ ,1---- [
=
= 0.04MAX I
~ (1.02 MAXI""-J
;;'::~
SEATINGPLANE~' --.:J L :.1.0]1400 ((01..2052)1
OFFSET
OFFSET
05L "T " ~4L V-
"KEEP THIS LEAD AS SHORT AS POSSIBLE.
OUTLINE DIMENSIONS
AD382 PIN CONFIGURATION
TOP VIEW
Dimensions shown in inches and (mm).
<i.
u1
TO-8 STYLE PACKAGE (AD382)
:)
z
1--0.55 (14)---1 ~
L~O:' I'
T0.375
L~(s.5Il0NG, MIN
'1~5
(4.2)
f
0.018
(0.461 DIA
OFFSET
NUll
~
OFFSET
NUll
0w
~z
iDi:..
T0-8 STYLE CAN
PINS ARE GOLD PLATED
~V-
)
"KEEP THIS LEAD AS SHORT AS POSSIBLE.
BOTTOM VIEW
-8-
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