Microchip HV254 Manual


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Supertex inc.
Supertex inc.
www.supertex.com
HV254
Doc.# DSFP-HV254
C070813
Features
32 independent high voltage ampliers
Up to 250V output voltage
3.0V/µs typical output slew rate
Very low operating current (typically 45µA per
channel)
High value internal feedback resistors
Fixed gain of 50V/V
Integrated silicon diode for temperature sensing
Applications
MEMS (microelectromechanical systems) driver
Piezoelectric transducer driver
Optical crosspoint switches (using MEMS
technology)
General Description
The Supertex HV254 is a 32-channel, high voltage, amplier
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 (Digital to Analog
Converter) with a voltage range of 0V to the low voltage supply,
V+. The output of the HV254 will swing from 7.0 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. However, the amplier will be saturated. Typical output
load is equivalent to a 125MΩ resistor in parallel with a 100pF
capacitor. The outputs have a guaranteed slew rate of at least
3.0V/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
consumption while maintaining a guaranteed slew rate of
3.0V/µs. High value resistors are used for the gain setting to
minimize current on the feedback path.
Typical Application Circuit
32-Channel High Voltage
Amplier Array
VIN0HVOUT0
HV254
PGND
HVOUT1
MEMS
Array
y
y
x
x
HVOUT2
HVOUT3
HVOUT30
HVOUT31
V-
V+ VPP
VIN1
VIN2
VIN3
VIN31
VIN30
Micro
Processor
DAC
DAC
DAC
DAC
DAC
DAC
High Voltage
Op-Amp
Array


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: HV254

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