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AD818ARZ Datasheet(Fiches technique) 13 Page - Analog Devices

Numéro de pièce AD818ARZ
Description  Low Cost, Low Power Video Op Amp
Télécharger  15 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
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AD818ARZ Datasheet(HTML) 13 Page - Analog Devices

 
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REV.
AD818
–13–
A HIGH SPEED, 3-OP AMP IN AMP
The circuit of Figure 11 uses three high speed op amps: two
AD818s and an AD817. This high speed circuit lends itself well
to CCD imaging and other video speed applications. It has the
optional flexibility of both dc and ac trims for common-mode
rejection, plus the ability to adjust for minimum settling time.
+VIN
RG
2pF
5pF
A1
AD818
–VIN
VOUT
2pF–8pF
SETTLING
TIME AC
CMR ADJUST
RL
2k
970
50
DC CMR
ADJUST
3pF
+15V
COMMON
–15V
10 F
10 F
+VS
–VS
0.1 F
0.1 F
1 F
1 F
PIN 7
EACH
AMPLIFIER
0.1 F
0.1 F
PIN 4
EACH
AMPLIFIER
EACH AMPLIFIER
BANDWIDTH, SETTLING TIME, AND TOTAL HARMONIC DISTORTION VS. GAIN
GAIN
RG
CADJ
(pF)
SMALL
SIGNAL
BANDWIDTH
SETTLING
TIME
TO 0.1%
THD + NOISE
BELOW INPUT LEVEL
@ 10kHz
3
10
100
1k
222
20
2–8
2–8
2–8
14.7MHz
4.5MHz
960kHz
200ns
370ns
2.5 s
82dB
81dB
71dB
1k
5pF
1k
1k
1k
1k
A2
AD818
A3
AD818
Figure 11. High Speed 3-Op Amp In Amp
DIFFERENTIAL LINE RECEIVER
The differential receiver circuit of Figure 9 is useful for many
applications—from audio to video. It allows extraction of a low
level signal in the presence of common-mode noise, as shown in
Figure 10.
VOUT
2pF
DIFFERENTIAL
INPUT
+5V
–5V
OUTPUT
AD818
0.01 F
2.2 F
0.01 F
2.2 F
2pF
1k
1k
1k
1k
VB
VA
Figure 9. Differential Line Receiver
10
90
100
0%
1V
2V
20ns
OUTPUT
VA
Figure 10. Performance of Line Receiver, RL = 150 W,
G = +2
D


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