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参数资料
| 型号： | PA89A |
| 厂商： | Electronic Theatre Controls, Inc. |
| 元件分类： | 运算放大器 |
| 英文描述： | HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS |
| 中文描述： | 高压功率运算放大器 |
| 文件页数： | 1/4页 |
| 文件大小： | 69K |
| 代理商： | PA89A |
APEX MICROTECHNOLOGY CORPORATION
TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
EXTERNAL CONNECTIONS*
TYPICAL APPLICATION
Ultra-high voltage capability combined with the bridge am-
plifier configuration makes it possible to develop +/–1000 volt
peak swings across a piezo element. A high gain of –50 for A1
insures stability with the capacitive load, while “noise-gain”
compensation Rn and Cn on A2 insure the stability of A2 by
operating in a noise gain of 50.
50R
A1
PA89
A2
PA89
R
–600V
V
IN
PIEZO
TRANSDUCER
50R
R
+600V
–600V
+600V
SINGLE AXIS MICRO-POSITIONING
50R
Cn
PATENTED
PHASE COMPENSATION
Gain
C
1
470pF
10
68pF
15
33pF
100
15pF
Note: C
must be rated for full supply voltage –Vs to +Vs.
See details under “EXTERNAL COMPONENTS”.
R
C
470
220
220
220
VIEW
–IN
+IN
N/C
N/C
–V
S
OUT
RESERVED
RESERVED
C
COMP
COMP
R
C
+V
C
S
L
R
R =
I
LIM
.7
1
2
3
4
5
6
12
11
10
9
8
7
TOP
FEATURES
1140V P-P SIGNAL OUTPUT
WIDE SUPPLY RANGE —
±
75V to
±
600V
PROGRAMMABLE CURRENT LIMIT
75 mA CONTINUOUS OUTPUT CURRENT
HERMETIC SEALED PACKAGE
INPUT PROTECTION
APPLICATIONS
PIEZOELECTRIC POSITIONING
HIGH VOLTAGE INSTRUMENTATION
ELECTROSTATIC DEFLECTION
SEMICONDUCTOR TESTING
DESCRIPTION
The PA89 is an ultra high voltage, MOSFET operational
amplifier designed for output currents up to 75 mA. Output
voltages can swing over 1000V p-p. The safe operating area
(SOA) has no second breakdown limitations and can be
observed with all types of loads by choosing an appropriate
current limiting resistor. High accuracy is achieved with a
cascode input circuit configuration and 120dB open loop gain.
All internal biasing is referenced to a bootstrapped zener-
MOSFET current source, giving the PA89 a wide supply range
and excellent supply rejection. The MOSFET output stage is
biased for class A/B linear operation. External compensation
provides user flexibility. The PA89 is 100% gross leak tested
to military standards for long term reliability.
This hybrid integrated circuit utilizes a beryllia (BeO) sub-
strate, thick film resistors, ceramic capacitors and semicon-
ductor chips to maximize reliability, minimize size and give top
performance. Ultrasonically bonded aluminum wires provide
reliable interconnections at all operating temperatures. The
MO-127 High Voltage, Power Dip package is hermetically
sealed and electrically isolated.
SIMPLIFIED SCHEMATIC
7
6
8
5
2
1
10
9
+IN
–IN
COMP
C
OUT
+V
S
–V
S
L
Q1
Q2
Q5
Q19
Q20
Q22
Q23
Q25B
Q26
Q25A
Q29
Q36
Q45
Q44
Q42
D1
D57
D30
D35
D34
D31
D5
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
HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS
PA89 PA89A
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