Microchip HV254 Handleiding

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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

Product specificaties