HV256 Datasheet, PDF (1/7 Pages) Supertex, Inc – 32-Channel High Voltage Amplifier Array

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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 limit
❑ Internal closed loop gain of 72V/V
❑ 12MΩ feedback impedance
❑ Layout ideal for die applications
Application
❑ 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 capaci-
tive 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.
Block Diagram
B_YP-V_PP
B_YP-V_DD
B_YP-V_NN
To internal V_PP bus
To internal V_DD bus
To internal V_NN bus
R_SOURCE
R_SINK
V_PP
V_DD
V_IN0
Output Current Source
Limiting for all HV_OUT
Output Current Sink
Limiting for all HV_OUT
+
-
71R
V_NN
R
V_IN1
V_DD V_PP
+
-
V_NN
71R
R
HV_OUT0
HV_OUT1
V_IN31
GND
V_NN
Anode
Cathode
V_DD V_PP
+
-
71R
R
HV_OUT31
A112304