AD795JN Ver la hoja de datos (PDF) - Analog Devices
Número de pieza
componentes Descripción
Fabricante
AD795JN Datasheet PDF : 16 Pages
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AD795
10kW
VIN
10kW
+VS 0.1mF
7
2
AD795 6
3
RL
4 0.1mF 10kW
VOUT
CL
100pF
–VS
Figure 24. Unity Gain Inverter
20V
5ms
100
90
10
0%
5V
Figure 25. Unity Gain Inverter
Large Signal Pulse Response
+VS 0.1mF
7
2
VIN
AD795 6
3
RL
VOUT
CL
4 0.1mF 10kW
100pF
–VS
Figure 27. Unity Gain Follower
20V
5ms
100
90
10
0%
5V
Figure 28. Unity Gain Follower
Large Signal Pulse Response
10mV
100
90
500n s
10
0%
Figure 26. Unity Gain Inverter
Small Signal Pulse Response
20mV
100
90
500n s
10
0%
Figure 29. Unity Gain Follower
Small Signal Pulse Response
MINIMIZING INPUT CURRENT
The AD795 is guaranteed to 1 pA max input current with ± 15
volt supply voltage at room temperature. Careful attention to
how the amplifier is used will maintain or possibly better this
performance.
The amplifier’s operating temperature should be kept as low as
possible. Like other JFET input amplifier’s, the AD795’s input
current will double for every 10∞C rise in junction temperature
(illustrated in Figure 6). On-chip power dissipation will raise the
device operating temperature, causing an increase in input
current. Reducing supply voltage to cut power dissipation will
reduce the AD795’s input current (Figure 4). Heavy output
loads can also increase chip temperature, maintaining a
minimum load resistance of 10 kW is recommended.
–8–
REV. B
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