hv254db1 Supertex, Inc., hv254db1 Datasheet

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hv254db1

Manufacturer Part Number
hv254db1
Description
High Voltage Amplifier Array
Manufacturer
Supertex, Inc.
Datasheet
Introduction
The Supertex HV254DB1 is a 32-channel 250V amplifier
array with a nominal gain of 50V/V. The HV254DB1
provides a means to easily evaluate the Supertex
HV254FG device. A high voltage supply, Vpp, and two
low voltage supplies, V+ and V-, are required. These
connections can be made via the J1 header provided on
the board. There are 32 pads on the left side of the
board for the input signals and 32 pads on the right for
the outputs. Please follow the power up/down sequence
to avoid damaging the device.
Power Up/Down Sequence
The device can be damaged due to improper power
up/down sequence. To prevent such damage, please
follow the acceptable power up/down sequences. Two
external diodes, D1 and D2, are added in the demo
board to prevent damage during power Up/Down. The
first diode is a high voltage diode across Vpp and V+.
Any low current high voltage diode such as a 1N4004
will be adequate. The second diode is a Schottky diode
across V- and PGND. Any low current Schottky diode
such as a 1N5817 will be adequate.
Acceptable Power Up Sequences
1) Vpp
1) V-
Acceptable Power Down Sequences
1) Inputs & Anode
1) Inputs & Anode
or
or
Supertex, Inc.
2) V-
2) V+
3) V+
3) Vpp
2) Vpp
2) V+
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: (408) 222-8888 FAX: (408) 222-4895 www.supertex.com
32 Inputs
4) Inputs & Anode
4) Inputs & Anode
3) V+
3) V-
4) V-
4) Vpp
PGND
Board Layout
1
C1
V+
U1
Specifications
Vpp, High voltage supply
V+, Low voltage positive supply
V-, Low voltage negative supply
Vin, Input signal range
HVout, Output voltage swing
Av, Closed loop gain
SR, Output slew rate into 100pF load
Inputs and Outputs
The output of the HV254FG will swing from 7V to 250V.
It cannot swing to ground. With the internal gain set at
50V/V, a minimum input signal of 140mV will still
maintain linearity. Input voltages below 140mV can be
applied without damage to the device. The amplifier,
however, will be saturated.
The maximum input signal can be as high as the positive
supply voltage, V+.
voltage of 5V, the output will be 250V. For additional
information, please refer to the HV254 data sheet.
Temperature Diode
The HV254FG has an integrated silicon diode to help
monitor the die temperature if desired. Pin 43 is the
anode and pin 44 is the cathode. Pads are available on
the board for these connections.
C2
V-
C3
J1
Vpp
High Voltage Amplifier Array
For a V+ of 5.0V and an input
32 Output
HV254DB1
-4.75V to -5.25V
4.75V to 5.25V
7V to 250V
50V/V ±5%
0V to V+
3.0V/µs
275V
A071404

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hv254db1 Summary of contents

Page 1

... Introduction The Supertex HV254DB1 is a 32-channel 250V amplifier array with a nominal gain of 50V/V. The HV254DB1 provides a means to easily evaluate the Supertex HV254FG device. A high voltage supply, Vpp, and two low voltage supplies, V+ and V-, are required. These connections can be made via the J1 header provided on the board ...

Page 2

... HV254DB1 Circuit Diagram Vpp V- V+ PGND J1 Vin0 Vin1 Vin31 Bill of Material Description D1 Rectifier diode D2 Schottky diode C1 X7R chip capacitor C2 X7R chip capacitor X7R chip capacitor C3 U1 Amplifier array J1 Right Angle 4-pin header Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate " ...

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