Microchip HV257 Handleiding
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2017 Microchip Technology Inc.DS20005827A-page 1
HV257
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 F
eedback Impedance
•Layout Ideal for Die Applications
Applications
•Microelectromechanical Systems (MEMS) Driver
•Piezoelectric Transducer Driver
•Optical Crosspoint Switches
(Using MEMS T
echnology)
General Description
The HV257 is a 32-channel, high-voltage
sample-and-hold 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
.
All 32 sample-and-hold circuits share a common
an
alog input, V
SIG
. The individual sample-and-hold
circuits are selected by a five-to-32 logic decoder. The
sampled voltage on the holding capacitor is buffered by
a low-voltage amplifier and is magnified by a
high-voltage amplifier with a closed-loop gain of 72V/V.
The internal closed-loop gain is set for an input voltage
range of 0V to 4.096V. The input voltage can be up to
5V, but the output will saturate. The maximum output
voltage swing is 5V below the V
PP
high-voltage supply.
The outputs can drive capacitive loads of up to
3000 pF.
The maximum output source and sink current can be
ad
justed 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.
Package Type
100-lead MQFP
(Top view)
1
100
See Table 3-1 for pin information.
32-Channel High-Voltage Sample-and-Hold Amplifier Array
Product specificaties
| Merk: | Microchip |
| Categorie: | Niet gecategoriseerd |
| Model: | HV257 |
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