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PA41A Schematic ( PDF Datasheet ) - Apex Microtechnology

Teilenummer PA41A
Beschreibung (PA41 / PA42) HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS
Hersteller Apex Microtechnology
Logo Apex Microtechnology Logo 




Gesamt 4 Seiten
PA41A Datasheet, Funktion
www.DataSheet4U.com
MICROTECHNOLOGY
HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS
PA41/PA42 • PA41A/PA42A
HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739
FEATURES
• MONOLITHIC MOS TECHNOLOGY
• LOW COST
• HIGH VOLTAGE OPERATION—350V
• LOW QUIESCENT CURRENT—2mA
• NO SECOND BREAKDOWN
• HIGH OUTPUT CURRENT—120 mA PEAK
• AVAILABLE IN DIE FORM—PA41DIE
APPLICATIONS
• PIEZO ELECTRIC POSITIONING
• ELECTROSTATIC TRANSDUCER & DEFLECTION
• DEFORMABLE MIRROR FOCUSING
• BIOCHEMISTRY STIMULATORS
• COMPUTER TO VACUUM TUBE INTERFACE
DESCRIPTION
The PA41/42 are high voltage monolithic MOSFET opera-
tional amplifiers achieving performance features previously
found only in hybrid designs while increasing reliability. Inputs
are protected from excessive common mode and differential
mode voltages. The safe operating area (SOA) has no second
breakdown limitations and can be observed with all type loads
by choosing an appropriate current limiting resistor. External
compensation provides the user flexibility in choosing
optimum gain and bandwidth for the application.
The PA41 is packaged in a hermetically sealed TO-3 and all
circuitry is isolated from the case by an aluminum nitride (AlN)
substrate.
The PA42 is packaged in APEX’s hermetic ceramic SIP10
package.
EQUIVALENT SCHEMATIC
D1
8 (6)
+VS
Q1 Q2
Q3
(1) 5
IN
(2) 6
+IN
Q4 Q5
D2 D3 D4 D5
(8) 2 Q6
COMP
COMP Q8
(9) 3
Q11
Q12
Q13
Q7
Q9
Q10
I LIM
1 (7)
4 (10)
OUT
5 PA41 PIN NUMBER
(1) PA42 PIN NUMBER
Q14
VS
7
(5)
TYPICAL APPLICATION
R 20R
20R
V IN +175
2.2K
10pF
20R
+175
2.2K
10pF
A1
PA41/42 RCL
180
100
A2
RCL PA41/42
PIEZO
TRANSDUCER 180
100
330pF
330pF
Rn
Cn
LOW COST 660V p-p
175
PIEZO DRIVE
175
Two PA41/42 amplifiers operated as a bridge driver for a
piezo transducer provides a low cost 660 volt total drive capa-
bility. The RN CN network serves to raise the apparent gain of A2
at high frequencies. If RN is set equal to R the amplifiers can be
compensated identically and will have matching bandwidths.
EXTERNAL CONNECTIONS
R CL
RC
COMP 3
CC
2 COMP
1 I LIM
OUT 4
TOP VIEW
5
IN
67
PA41 +IN VS
8
+VS
CS
330pF
RS
100
PHASE
COMPENSATION
Gain
1
C
C
18pF
R
C
2.2K
10 10pF 2.2K
30 3.3pF 2.2K
C S , C C ARE NPO RATED
FOR FULL SUPPLY VOLTAGE.
RCL =
3
I LIM
PA42
TOP VIEW
1 2 3 4 5 6 7 8 9 10
NC NC VS
IN +IN
+VS ILIM
RS
100
CS
330pf
CC CC
RC
CC
OUT
RCL
NOTE: PA41 Recommended mounting torque is 4-7 in•lbs
(.45 -.79 N•m)
CAUTION: The use of compressible, thermally conductive
insulators may void warranty.
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected]





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