Instrukcja obsługi Microchip HV256

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 2017-2020 Microchip Technology Inc.DS20005826B-page 1

HV256

Features

•Thirty-two 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

•12 MΩ Feedback Impedance

•Layout Ideal for Die Applications

Applications

•Microelectromechanical Systems (MEMS) Driver

•Piezoelectric Transducer Driver

•Optical Crosspoint Switches

(Using MEMS Technology)

General Description

The 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 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 VPPhigh-voltage supply. The outputs can

drive capacitive loads of up to 3000 pF.

The maximum output source and sink currents can be

adjusted by using two external resistors. An external

RSOURCEresistor controls the maximum sourcing

current, and an external R

SINKresistor 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.

Package Type

1

100

100-lead MQFP

(Top view)

See Table 3-1 for pin information.

32-Channel High-Voltage Amplifier Array

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