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參數資料
| 型號： | PA09 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | VIDEO POWER OPERATIONAL AMPLIFIERS |
| 中文描述： | 視頻功耗運算放大器 |
| 文件頁數： | 1/4頁 |
| 文件大小： | 62K |
| 代理商： | PA09 |
APEX MICROTECHNOLOGY CORPORATION
TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
+37V
–37V
470pF
R
F
100
R
S
.5
R
D
12K
C
F
PA09
V
I
4
3
7
8
1
C
C
2pF
di
dt
= 15A/μs
i = V
i
/R
S
L
Y
13μH
1
5
6
FIGURE 1. PA09 AS DEFLECTION AMPLIFIER
FEATURES
POWER MOS TECHNOLOGY — 2A peak rating
HIGH GAIN BANDWIDTH PRODUCT — 150MHz
VERY FAST SLEW RATE — 400V/
μ
s
PROTECTED OUTPUT STAGE — Thermal shutoff
EXCELLENT LINEARITY — Class A/B output
WIDE SUPPLY RANGE —
±
12V to
±
40V
LOW BIAS CURRENT, LOW NOISE — FET input
APPLICATIONS
VIDEO DISTRIBUTION AND AND AMPLIFICATION
HIGH SPEED DEFLECTION CIRCUITS
POWER TRANSDUCERS TO 5MHz
COAXIAL LINE DRIVERS
POWER LED OR LASER DIODE EXCITATION
DESCRIPTION
The PA09 is a high voltage, high output current operational
amplifier optimized to drive a variety of loads from DC through
the video frequency range. Excellent input accuracy is
achieved with a dual monolithic FET input transistor which is
cascoded by two high voltage transistors to provide outstand-
ing common mode characteristics. All internal current and
voltage levels are referenced to a zener diode biased on by
a current source. As a result, the PA09 exhibits superior DC
and AC stability over a wide supply and temperature range.
High speed and freedom from second breakdown is as-
sured by a complementary Power MOS output stage. For
optimum linearity, especially at low levels, the Power MOS
transistors are biased in the class A/B mode. Thermal shutoff
provides full protection against overheating and limits the
heatsink requirements to dissipate the internal power losses
under normal operating conditions. A built-in current limit
protects the amplifier against overloading. Transient induc-
tive load kickback protection is provided by two internal
clamping diodes. External phase compensation allows the
user maximum flexibility in obtaining the optimum slew rate
and gain bandwidth product at all gain settings. For continu-
ous operation under load, a heatsink of proper rating is
recommended.
This hybrid integrated circuit utilizes thick film (cermet) resistors,
ceramic capacitors and silicon semiconductor chips to maximize
reliability, minimize size and give top performance. Ultrasonically
bonded aluminum wires provide reliable interconnections at all
operating tempera-
tures. The 8-pin TO-3
package s hermetically
sealed and electrically
isolated. The use of
com-pressible thermal
washers and/or im-
proper mounting torque
will void the product
warranty. Please see
“General Operating
Considerations”.
DEFLECTION AMPLIFIER
(Figure 1)
The deflection amplifier circuit of Figure 1 achieves arbitrary
beam positioning for a fast heads-up display. Maximum tran-
sition times are 4
μ
s while delivering 2A pk currents to the
13mH coil. The key to this circuit is the sense resistor (R
S
)
which converts yoke current to voltage for op amp feedback.
This negative feedback forces the coil current to stay exactly
proportional to the control voltage. The network consisting of
R
, R
and C
serves to shift from a current feedback via R
to
a direct voltage feedback at high frequencies. This removes
the extra phase shift caused by the inductor thus preventing
oscillation. See Application Note 5 for details of this and other
precision magnetic deflection circuits.
EQUIVALENT SCHEMATIC
EXTERNAL CONNECTIONS
3
6
2
7
8
5
4
1
Q1
Q5
Q2
D1
D2
Q18
Q15
Q10
Q12B
Q9
C2
Q8
Q12A
Q4
Q3
C1
Q6
Q13
Q11
Q14
D3
Q16
Q17
Q7
Q19
R
C
TOP VIEW
1
2
3
4
5
6
7
8
C
C
–V
S
+IN
–IN
+V
S
OUT
BAL
C
C
R
C
R
S
= (| +V
S
| + | –V
S
|) R
T
/1.6
NOTE: Input offset voltage trim optional. R
T
= 10K MAX
R
T
R
S
PHASE COMPENSATION
C
C
100pF
15pF
5pF
none
GAIN
1
10
100
1000
R
C
200
0
0
none
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
VIDEO POWER OPERATIONAL AMPLIFIERS
PA09 PA09A
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