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HV257 Datasheet(PDF) 3 Page - Supertex, Inc

Part # HV257
Description  32 CHANNEL HIGH VOLTAGE SAMPLE AND HOLD AMPLIFIER ARRAY
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Manufacturer  SUTEX [Supertex, Inc]
Direct Link  http://www.supertex.com
Logo SUTEX - Supertex, Inc

HV257 Datasheet(HTML) 3 Page - Supertex, Inc

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3
HV257
A122104
Symbol
Parameter
Min
Typ
Max
Units
Conditions
Symbol
Min
Typ
Max
Units
Conditions
VPED
Pedestal Voltage
mV
RSW
Sample and Hold Switch resistance
5.0
K
C
Sample and Hold Capacitor
10
pF
RDROOP
Droop rate during hold time relative to input
2.0
V/s
VSIG
Input voltage range
5.0
TSU
Set-up time-address to enable
75
ns
TH
Hold time-address to enable bar
75
ns
VIH
Input logic high voltage
2.4
D
D
V
VIL
Input logic low voltage
1.2
lIH
Input logic high current
1.0
µA
=
VIH
D
D
lIL
Input logic low current
-1.0
µA
0
=
VIL
PIV
Peak inverse voltage
5.0
cathode to anode
V
F
Forward diode drop
If = 100
µA, anode to cathode@25OC
I
F
Forward diode current
100
µA
anode to cathode
T
C
V
F temperature coefficient
-2.20
C
˚
/
V
m
anode to cathode
0
V
Parameter
Symbol
Min
Typ
Max
Units
Conditions
Parameter
V
V
V
V
0
V
V
1.0
12.0
input referred
output referred
0.60
Acceptable Power Up Sequences
1) V
PP
2) V
NN
3) V
DD
4) Inputs & Anode
or
1) V
NN
2) V
DD
3) V
PP
4) Inputs & Anode
Acceptable Power Down Sequences
1) Inputs & Anode
2) V
DD
3) V
NN
4) V
PP
or
1) Inputs & Anode
2) V
PP
3) V
DD
4) V
NN
Power Up/Down Sequence
The device can be damaged due to improper power up / down
sequence. To prevent damage, please follow the acceptable
power up /down sequences and add two external diodes as
shown in the diagram below. The first diode is a high voltage
diode across VPP and VDD where the anode of the diode is
connected to VDD and the cathode of the diode is connected to
Vpp. Any low current high voltage diode such as a 1N4004 will
be adequate. The second diode is a schottky diode across VNN
and DGnd where the anode of the schottky diode is connected
to VNN and the cathode is connected to DGnd. Any low current
schottky diode such as a 1N5817 will be adequate.
VDD
VPP
1N4004
or similar
VNN
DGND
1N5817
or similar
Sample and Hold
Logic Decoder
Diode


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