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HV256_13 Datasheet, PDF (1/13 Pages) Supertex, Inc – 32-Channel High Voltage Amplifier Array | |||
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Supertex inc.
HV256
32-Channel High Voltage
Amplifier Array
Features
âºâº 32 independent high voltage amplifiers
âºâº 300V operating voltage
âºâº 295V output voltage
âºâº 2.2V/µs typical output slew rate
âºâº Adjustable output current source limit
âºâº Adjustable output current sink limit
âºâº Internal closed loop gain of 72V/V
âºâº 12M⦠feedback impedance
âºâº Layout ideal for die applications
Applications
âºâº MEMS (microelectromechanical systems) driver
âºâº Piezoelectric transducer driver
âºâº Optical crosspoint switches (using MEMS
technology)
General Description
The Supertex HV256 is a 32-channel, high voltage, amplifier
array integrated circuit. It operates on a single high voltage
supply, up to 300V, and two low voltage supplies, VDD and VNN.
The input voltage range is from 0 to 4.096V. The internal closed
loop gain is 72V/V, giving an output voltage of 295V when
4.096V is applied. Input voltages of up to 5.0V can be applied,
but will cause the output to saturate. The maximum output
voltage swing is 5.0V below the VPP high voltage supply. The
outputs can drive capacitive loads of up to 3000pF.
The maximum output source and sink current can be adjusted
by using two external resistors. An external RSOURCE resistor
controls the maximum sourcing current and an external RSINK
resistor controls the maximum sinking current. The current
limit is approximately 12.5V divided by the external resistor
value. The setting is common for all 32 outputs. A low voltage
silicon junction diode is made available to help monitor the die
temperature.
Typical Application Circuit
Micro
Processor
DAC
DAC
DAC
DAC
VIN0
VIN0
VIN0
VIN0
VDD VPP HV256
High Voltage
Op-Amp
Array
HVOUT0
HVOUT1
HVOUT2
HVOUT3
DAC
DAC
VIN30
VIN31
HVOUT30
HVOUT31
AGND
VNN
y
x
x
y
MEMS
Array
Doc.# DSFP-HV256
D070813
Supertex inc.
www.supertex.com
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