HV254 Datasheet, PDF (1/7 Pages) Supertex, Inc – 32-Channel High Voltage Amplifier Array

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32-Channel High Voltage Amplifier Array
Features
❑ 32 independent high voltage amplifiers
❑ Output voltage up to 250V
❑ 3V/µs output slew rate
❑ Fixed gain of 50V/V
❑ High value internal feedback resistors
❑ Very low operating current (typically 45µA per channel)
❑ Integrated silicon diode for temperature sensing
Application
❑ MEMS (microelctromechanical systems) driver
❑ Piezoelectric transducer driver
❑ Optical crosspoint switches (using MEMS technology)
General Description
The Supertex HV254 is a 32-channel high voltage amplifier
array integrated circuit. It operates on a 275V high voltage
supply and two low voltage supplies: +5.0V and –5.0V. Each
channel has its own input and output. An integrated diode is
included to help monitor die temperature.
The input voltage can be from a DAC with a voltage range of 0V
to the low voltage supply, V+. 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.Typical output load is equivalent to a 125Mohm
resistor in parallel with a 100pF capacitor. The outputs have a
guaranteed slew rate of at least 3V/µs.The internal closed loop
gain is set at a nominal value of 34.0dB (50V/V).
The HV254 is designed to operate with minimal power con-
sumption while maintaining a guaranteed slew rate of 3V/µs.
High value resistors are used for the gain setting to minimize
current on the feedback path.
Block Diagram
Anode
Cathode
VIN0
V+ VPP
+
-
V-
49R
R
VIN1
V+ VPP
+
-
V-
49R
R
VIN31
PGND
V+ VPP
+
-
49R
R
HV254
HVOUT0
HVOUT1
HVOUT31
V-
A113004