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參數資料
| 型號： | PA91 |
| 英文描述： | Operational Amplifier |
| 中文描述： | 運算放大器 |
| 文件頁數： | 1/4頁 |
| 文件大小： | 87K |
| 代理商： | PA91 |
APEX MICROTECHNOLOGY CORPORATION
TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
FEATURES
HIGH VOLTAGE — 450V (
±
225V)
LOW QUIESCENT CURRENT — 10mA
HIGH OUTPUT CURRENT — 200mA
PROGRAMMABLE CURRENT LIMIT
HIGH SLEW RATE — 300V/
μ
s
APPLICATIONS
PIEZOELECTRIC POSITIONING
HIGH VOLTAGE INSTRUMENTATION
ELECTROSTATIC TRANSDUCERS
PROGRAMMABLE POWER SUPPLIES UP TO 440V
DESCRIPTION
The PA91 is a high voltage, low quiescent current MOSFET
operational amplifier designed for driving continuous output
currents up to 200mA and pulse currents up to 350mA. The
safe operating area (SOA) has no second breakdown limita-
tions 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 bandwidth and slew rate for the
application. APEX’s Power SIP package uses a minimum of
board space allowing for high density circuit boards.
EQUIVALENT SCHEMATIC
Q1
Q2
R1 R2
C1
R3
Q3
CC1
12
11
+V
S
1
4
5
9
6
10
2
7
8
CC2
3
I
Q
Q6
Q5
R5
R8
R9
Q15
R11
R12
Q16
Q12
Q8
R4
R7
Q4
ILIM
OUT
Q14
R10
Q13
Q11
–
IN
+IN
–
V
S
R6
LOW POWER, PIEZOELECTRIC POSITIONING
TYPICAL APPLICATION
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 PA91 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.
F
R
PA91
IN
R
1
2
6
7,8
9,10
11,12
PIEZO DRIVE
S
–
V
S
+V
OUT
V
COMPUTER
FOCUS
COMMAND
VOLTAGE
CL
R
PHASE COMPENSATION
EXTERNAL CONNECTIONS
Package: SIP03
GAIN
≥
1
≥
5
≥
10
≥
30
Cc*
68pF
Rc
100
100
0
0
10pF
4.7pF
NONE
*Cc To be rated for the full supply voltage
+V to
–
Vs. Use NPO ceramic (COG) type.
1
2
3
4
5
6
7
8
9
10
–
IN
+IN
R
CL
+Vs
–
Vs
TO LOAD
AND FEEDBACK
11
12
Rc
Cc
*
*
(See text.)
* Bypassing required.
I
Q
HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739
M I C R O T E C H N O L O G Y
PA91
HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER
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