HV254
Diode
Symbol
Parameter
Min
Typ
Max
Units
Conditions
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 V+ where the anode of the diode is connected to
V+ 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 V- and DGnd where
the anode of the schottky diode is connected to V- and the cathode
is connected to DGnd. Any low current schottky diode such as a
1N5817 will be adequate.
V+
1N4004
or similar
V-
1N5817
or similar
V
PP
PGND
Acceptable Power Up Sequences
1) V
PP
or
1) V-
2) V-
2) V+
3) V+
3) V
PP
4) Inputs & Anode
4) Inputs & Anode
Acceptable Power Down Sequences
1) Inputs & Anode
or
1) Inputs & Anode
2) V+
2) V
PP
3) V-
3) V+
4) V
PP
4) V-
Pin Description
V
PP
V+
V-
PGND
Anode
Cathode
V
IN
0 to V
IN
31
HV
OUT
0 to HV
OUT
31
High voltage positive supply.
Analog low voltage positive supply
Analog low voltage negative supply
Device ground
Anode side of a low voltage silicon diode that can be used to monitor die
temperature.
Cathode side of a low voltage silicon diode that can be used to monitor die
temperature.
Amplifie.r inputs
Amplifier outpu.ts
3
A113004
SUPERTEX [ Supertex, Inc ]
