PA90 데이터 시트보기 (PDF) - Apex Microtechnology
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PA90 Datasheet PDF : 4 Pages
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MICROTECHNOLOGY
HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER
PA90
HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739
FEATURES
• HIGH VOLTAGE — 400V (±200V)
• LOW QUIESCENT CURRENT — 10mA
• HIGH OUTPUT CURRENT — 200mA
• PROGRAMMABLE CURRENT LIMIT
• HIGH SLEW RATE — 300V/µs
APPLICATIONS
• PIEZOELECTRIC POSITIONING
• HIGH VOLTAGE INSTRUMENTATION
• ELECTROSTATIC TRANSDUCERS
• PROGRAMMABLE POWER SUPPLIES UP TO 390V
DESCRIPTION
The PA90 is a high voltage, low quiescent current MOSFET
operational amplifier designed as a low cost solution for driving
continuous output currents up to 200mA and pulse currents up
to 350mA. The safe operating area (SOA) has no second
breakdown limitations and can be observed for all type loads
by choosing an appropriate current limiting resistor. The
MOSFET output stage is biased AB for linear operation.
External compensation provides flexibility in choosing band-
width and slew rate for the application. APEX’s Power SIP12
package uses a minimum of board space allowing for high
density circuit boards.
EQUIVALENT SCHEMATIC
12
11
+VS
R1 R2
C1
R3
Q3
Q1
Q2
Q6
Q5
1
–IN R5
R8
2
+IN
Q15
5
4 CC2
CC1
R6
R9
3
IQ
Q8
Q11
Q13
Q12
Q16
R11
R12
–VS
7
8
R4
Q4
ILIM
9
R7 10
6
OUT
Q14
R10
TYPICAL APPLICATION
RF
+VS
R IN
COMPUTER
FOCUS
COMMAND
VOLTAGE
1 11,12
PA90
6
2
9,10
7,8
R CL
PIEZO DRIVE
V OUT
–V S
LOW POWER, PIEZOELECTRIC POSITIONING
Piezo positioning may be applied to the focusing of seg-
mented mirror systems. The composite mirror may be com-
posed of hundreds of elements, each requiring focusing under
computer control. In such complex systems the PA90 reduces
the costs of power supplies and cooling with its advantages of
low cost and low quiescent power consumption while increas-
ing circuit density with the SIP package.
PHASE COMPENSATION
GAIN
≥1
Cc*
68pF
Rc
100Ω
≥5 10pF 100Ω
≥10 4.7pF 0Ω
≥30 NONE 0Ω
*Cc To be rated for the full supply voltage
+V to –Vs. Use NPO ceramic (COG) type.
EXTERNAL CONNECTIONS
1 2 3 4 5 6 7 8 9 10 11 12
Rc
–IN +IN
IQ
(See text.)
Cc
RCL
*
*
–Vs
TO LOAD
AND FEEDBACK
+Vs
* Bypassing required.
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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