Microchip HV256 Manual de Usario

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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 M 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 VPP high-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
RSOURCE 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.
Package Type
1
100
100-lead MQFP
(Top view)
See Table 3-1 for pin information.
32-Channel High-Voltage Amplifier Array
HV256
DS20005826B-page 2 2017-2020 Microchip Technology Inc.
Functional Block Diagram
HVOUT0
HVOUT31
HVOUT1
GND
VPP
VNN
-
+
R
71R
VDD
VPP
-
+
VIN0
VPP
-
+
Output Current Source
Limiting for all HVOUT
RSOURCE
R
R
RSINK Output Current Sink
Limiting for all HVOUT
71R
71R
Anode
Cathode
To internal VPP busBYP-VPP
BYP-VDD
BYP-VNN To internal VNN bus
To internal VDD bus
VIN1
VIN31
VDD
VDD
VNN
VNN
2017-2020 Microchip Technology Inc. DS20005826B-page 3
HV256
Typical Application Circuit
VIN0
VIN0
VIN0
VIN0
HVOUT0
HVOUT1
HVOUT2
HVOUT3
HV256
AGND
MEMS
Array
y
y
x x
HVOUT30
HVOUT31
VNN
VDD VPP
VIN30
VIN31
Micro
Processor
DAC
DAC
DAC
DAC
DAC
DAC
High Voltage
Op-Amp
Array
RSOURCE
RSINK

Especificaciones del producto

Marca: Microchip
Categoría: No categorizado
Modelo: HV256

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