HV256_07 Datasheet, PDF (1/11 Pages) Supertex, Inc – 32-Channel High Voltage Amplifi er Array

HV256
32-Channel High Voltage
Amplifier Array
Features
► 32 independent high voltage amplifiers
► 300V operating voltage
► 295V output voltage
► 2.2V/µs typical output slew rate
► Adjustable output current source limit
► Adjustable output current sink limit
► Internal closed loop gain of 72V/V
► 12MΩ feedback impedance
► Layout ideal for die applications
Applications
► MEMS (microelectromechanical systems) driver
► Piezoelectric transducer driver
► 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, V_DD and
V_NN.
The input voltage range is from 0V 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 5V can be
applied, but will cause the output to saturate. The maximum
output voltage swing is 5V below the V_PP 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 R_SOURCE resistor
controls the maximum sourcing current and an external R_SINK
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
Supertex
HV256
V_DD V_PP
V_IN0
V_IN1
V_IN2
V_IN3
High Voltage
Op-Amp
Array
HV_OUT0
HV_OUT1
HV_OUT2
HV_OUT3
DAC
DAC
V_IN30
V_IN31
HV_OUT30
HV_OUT31
A_GND
V_NN
y
x
x
y
MEMS
Array