PA09A [CIRRUS]
Power Operational Amplifier; 功率运算放大器
| 型号： | PA09A |
| 厂家： | 
CIRRUS LOGIC |
| 描述： | Power Operational Amplifier |
| 文件： | 总6页 (文件大小：216K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PA09 • PA09A
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Power Operational Amplifier
FEATURES
•ꢀPOWERꢀMOSꢀTECHNOLOGYꢀ—ꢀ2Aꢀpeakꢀrating
•ꢀHIGHꢀGAINꢀBANDWIDTHꢀPRODUCTꢀ—ꢀ150MHz
•ꢀVERYꢀFASTꢀSLEWꢀRATEꢀ—ꢀ200V/µs
•ꢀPROTECTEDꢀOUTPUTꢀSTAGEꢀ—ꢀThermalꢀshutoff
•ꢀEXCELLENTꢀLINEARITYꢀ—ꢀClassꢀA/Bꢀoutput
•ꢀWIDEꢀSUPPLYꢀRANGEꢀ—ꢀ±12Vꢀtoꢀ±40V
•ꢀLOWꢀBIASꢀCURRENT,ꢀLOWꢀNOISEꢀ—ꢀFETꢀinput
8-PINꢀTO-3
PACKAGEꢀSTYLEꢀCE
APPLICATIONS
•ꢀVIDEOꢀDISTRIBUTIONꢀANDꢀANDꢀAMPLIFICATION
•ꢀHIGHꢀSPEEDꢀDEFLECTIONꢀCIRCUITS
•ꢀPOWERꢀTRANSDUCERSꢀTOꢀ2MHz
•ꢀCOAXIALꢀLINEꢀDRIVERS
•ꢀPOWERꢀLEDꢀORꢀLASERꢀDIODEꢀEXCITATION
DEFLECTIONꢀAMPLIFIERꢀ(Figure 1)
The deflection amplifier circuit of Figure 1 achieves arbi-
trary beam positioning for a fast heads-up display. Maximum
transition times are 4µs while delivering 2A pk currents to the
13mH coil. The key to this circuit is the sense resistor (R )
which converts yoke current to voltage for op amp feedbacSk.
This negative feedback forces the coil current to stay exactly
proportional to the control voltage. The network consisting of
R , RF and CF serves to shift from a current feedback via RS
toDa 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.
DESCRIPTION
The PA09 is a high voltage, high output current operational
amplifier optimized to drive a variety of loads from DC through
thevideofrequencyrange.Excellentinputaccuracyisachieved
with a dual monolithic FET input transistor which is cascoded
bytwohighvoltagetransistorstoprovideoutstandingcommon
modecharacteristics.Allinternalcurrentandvoltagelevelsare
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.
EQUIVALENTꢀSCHEMATIC
2
3
D1
C1
Q6
Highspeedandfreedomfromsecondbreakdownisassured
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
normaloperatingconditions.Abuilt-incurrentlimitprotectsthe
amplifieragainstoverloading.Transientinductiveloadkickback
protectionisprovidedbytwointernalclampingdiodes.External
phase compensation allows the user maximum flexibility in
obtaining the optimum slew rate and gain bandwidth product
at all gain settings. For continuous operation under load, a
heatsink of proper rating is recommended.
Q5
Q3
Q1
Q2
Q4
7
8
Q7
Q13
Q11
Q14
Q8
Q9
1
Q12A
Q12B
C2
Q17
5
4
Q10
Q19
D3
Q15
Q16
Thishybridintegratedcircuitutilizesthickfilm(cermet)resis-
tors, ceramic capacitors and silicon semiconductor chips to
maximize reliability, minimize size and give top performance.
Ultrasonically bonded aluminum wires provide reliable inter-
connections at all operating temperatures.The CE, 8-pinTO-3
D2
Q18
6
EXTERNALꢀCONNECTIONS
package is hermeti-
callysealedandelec-
trically isolated. The
use of com-pressible
thermalwashersand/
or improper mount-
ing torque will void
the product warranty.
Please see “General
Operating Consider-
ations”.
+37V
CC 5pF
di
dt
= 2A/µs
BAL
+VS
3
3
2
7
PA09
6
4
5
i = Vi /RS
OUT
VI
1
8
RT
RS
1
4
5
+IN
–IN
CF
TOP VIEW
LY
470pF
13µH
1Ω
8
RD
3.9K
6
CC
–37V
7
RF
–VS
CC
RC
100Ω
RS
.5Ω
RS = (|+VS| + |–VS|) RT /1.6
NOTE: Input offset voltage trim optional. RT = 10KΩ MAX
FIGURE 1. PA09 AS DEFLECTION AMPLIFIER
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 2009
APEX − PA09UREVM
http://www.cirrus.com
P r o d u c t I n n o v a t i o n F r o m
PA09 • PA09A
SUPPꢀꢁ ꢂOꢀTAGE, +ꢂS to –ꢂS
80ꢂ
5A
78ꢃ
40ꢂ
ABSOLUTEꢀMAXIMUMꢀRATINGS
OUTPUT CURRENT, within SOA
POꢃER DꢄSSꢄPATꢄON, internal1
ꢄNPUT ꢂOꢀTAGE, differential
ꢄNPUT ꢂOꢀTAGE, common mode
TEMPERATURE, pin solder - 10s
TEMPERATURE, junction1
ꢂS
300°C
150°C
TEMPERATURE RANGE, storage
OPERATꢄNG TEMPERATURE RANGE, case
–65 to +150°C
–55 to +125°C
SPECIFICATIONS
PARAMETER
PA09
TYP
PA09A
TYP
TEST CONDITIONS2
MIN
MAX
MIN
MAX
UNITS
INPUT
OFFSET ꢂOꢀTAGE, initial
OFFSET ꢂOꢀTAGE, vs. temperature
OFFSET ꢂOꢀTAGE, vs. supply
BꢄAS CURRENT, initial
.5
10
10
3
30
.25
5
*
3
*
1.5
*
*
*
*
.5
10
mꢂ
µꢂ/°C
µꢂ/ꢂ
pA
pA/ꢂ
pA
Ω
pF
ꢂ
dB
Full temperature range
5
100
50
20
10
BꢄAS CURRENT, vs. supply
OFFSET CURRENT, initial
ꢄNPUT ꢄMPEDANCE, DC
ꢄNPUT CAPACꢄTANCE
.01
2.5
1011
6
ꢂS–8
104
COMMON MODE ꢂOꢀTAGE RANGE3
COMMON MODE REꢅECTꢄON, DC
Full temperature range
Full temperature range, ꢂCM
ꢂS–10
80
*
=
20ꢂ
GAIN
OPEN ꢀOOP GAꢄN at 15Hz
R = 1kΩ
98
*
*
*
*
dB
GAꢄN BANDꢃꢄDTH PRODUCT at 1MHz Cꢀ = 5pF
150
750
150
MHz
KHz
KHz
POꢃER BANDꢃꢄDTH
POꢃER BANDꢃꢄDTH
RC = 15Ω, C = 5pF
Rꢀꢀ = 15Ω, CCC = 100pF
OUTPUT
ꢂOꢀTAGE SꢃꢄNG3
CURRENT, PEAK
SETTꢀꢄNG TꢄME to 1%
SETTꢀꢄNG TꢄME to .1%
SꢀEꢃ RATE
Full temperature range, ꢄO = 2A
ꢂS –8
ꢂ –7
4S.5
.75
1.3
220
25
*
*
*
*
*
*
*
*
ꢂ
A
µs
4ꢂ step, C = 100pF
4ꢂ step, CCC = 100pF
C = 5pF
µs
ꢂ/µs
ꢂ/µs
Ω
SꢀEꢃ RATE
RESꢄSTANCE
CCC = 100pF
7.5
POWER SUPPLY
ꢂOꢀTAGE
CURRENT, quiescent
Full temperature range
12
35
70
40
85
*
*
*
*
*
*
ꢂ
mA
THERMAL
RESꢄSTANCE, AC junction to case4
RESꢄSTANCE, DC junction to case
RESꢄSTANCE, junction to air
TEMPERATURE RANGE, case
Full temperature range, F > 60Hz
Full temperature range, F < 60Hz
Full temperature range
1.2
1.6
30
25
1.3
1.8
*
*
*
*
*
*
°C/ꢃ
°C/ꢃ
°C/ꢃ
°C
Meets full range specifications
–25
+ 85
*
NOTES:
*
The specification of PA09A is identical to the specification for PA09 in applicable column to the left.
1. ꢀong term operation at the maximum junction temperature will result in reduced product life. Derate power dissipation to achieve
high MTTF.
2. Unless otherwise noted: TC = 25°C, supply voltage = 35ꢂ.
3. +ꢂ and -ꢂS denote the positive and negative supply rail respectively. Total ꢂS is measured from +ꢂS to –ꢂS.
4. RaSting applies if the output current alternates between both output transistors at a rate faster than 60Hz.
The internal substrate contains beryllia (BeO). Do not break the seal. ꢄf accidentally broken, do not crush, machine, or
subject to temperatures in excess of 850°C to avoid generating toxic fumes.
ꢀ CAUTION
2
PA09U
P r o d u c t I n n o v a t i o n F r o m
PA09 • PA09A
POWER DERATING
CURRENT LIMIT
QUIESCENT CURRENT
80
70
60
50
40
30
20
1.6
1.4
9
8
7
6
5
4
1.2
1.0
.8
3
2
1
10
0
.6
0
25
50
75
100 125 150
–55 –25
25 50 75 100 125
0
30
40
50
60
70
80
CASE TEMPERATURE, TC (°C)
JUNCTION TEMPERATURE, TJ (°C)
TOTAL SUPPLY VOLTAGE, VS (V)
SMALL SIGNAL RESPONSE
POWER RESPONSE
OUTPUT VOLTAGE SWING
10
100
90
100
80
60
40
20
0
80
9
8
70
60
50
5pF
6.2pF
15pF
15pF
40
30
7
6
5
33pF
33pF
100pF
330pF
100pF
330pF
20
4
3
10
-20
0
1
2
3
4
5
10 30
100 300
1K
3K
1M
10 100 1K 10K 100K 1M 10M 100M
FREQUENCY, F (Hz)
OUTPUT CURRENT, IO (A)
FREQUENCY, F (KHz)
PHASE RESPONSE
INPUT NOISE
SLEW RATE vs. COMP.
1000
0
-40
30
5pF
20
15
300
100
15pF
33pF
V/µs
HIGH
ALL
OTHERS
-80
10
7
30
10
100pF
-120
-160
-200
330pF
LOW
5
3
1
GAIN
30
330pF
3
1
3
10
100 300
1K
10 100 1K 10K 100K 1M 10M 100M
FREQUENCY, F (Hz)
10
100
1K
10K 100K 1M
COMPENSATION CAPACITOR, CC (pF)
FREQUENCY, F (Hz)
COMMON MODE REJECTION
POWER SUPPLY REJECTION
COMMON MODE VOLTAGE
100
70
120
100
50
40
80
60
40
| +VS | + | –VS | = 80V
30
80
60
40
20
20
15
CC= 100pF
20
0
10
7
100K 300K
1M
3M
10M 30M
1K
10K 100K
1M
10M 100M
1K
10K 100K
1M
10M 100M
FREQUENCY, F(Hz)
FREQUENCY, F (Hz)
FREQUENCY, F (Hz)
PA09U
3
P r o d u c t I n n o v a t i o n F r o m
PA09 • PA09A
2. Short circuits to ground are safe with dual supplies up to
GENERAL
20ꢂ.
Please read Application Note 1 "General Operating Con-
siderations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specification
interpretation. ꢂisit www.Cirrus.com for design tools that help
automatetaskssuchascalculationsforstability,internalpower
dissipation, current limit; heat sink selection; Apex Precision
Power’scompleteApplicationNoteslibrary;TechnicalSeminar
ꢃorkbook; and Evaluation Kits.
3. The output stage is protected against transient flyback.
However, for protection against sustained, high energy
flyback, external fast-recovery diodes should be used.
BYPASSINGꢀOFꢀSUPPLIES
Each supply rail must be bypassed to common with a tanta-
lum capacitor of at least 47µF in parallel with a .47µF ceramic
capacitor directly connected from the power supply pins to the
ground plane.
SUPPLYꢀVOLTAGE
The specified voltage ( ꢂS) applies for a dual ( ) supply
having equal voltages. A nonsymmetrical (ie. +70/–10ꢂ) or a
single supply (ie. 80ꢂ) may be used as long as the total volt-
age between the +ꢂS and –ꢂS rails does not exceed the sum
of the voltages of the specified dual supply.
OUTPUTꢀLEADS
Keep the output leads as short as possible. ꢄn the video
frequency range, even a few inches of wire have significant
inductance, raising the interconnection impedance and limit-
ing the output current slew rate. Furthermore, the skin effect
increases the resistance of heavy wires at high frequencies.
Multistrand ꢀitz ꢃire is recommended to carry large video
currents with low losses.
SAFEꢀOPERATINGꢀAREAꢀ(SOA)
The MOSFET output stage of this power operational ampli-
fier has two distinct limitations:
1. The current handling capability of the MOSFET geometry
and the wire bonds.
2. The junction temperature of the output MOSFETs.
GROUNDING
Single point grounding of the input resistors and the input
signal to a common ground plane will prevent undesired cur-
rentfeedback,whichcancauselargeerrorsand/orinstabilities.
"Single point" is a key phrase here; a ground plane should be
used as shielding rather than a current path. ꢀeaving the case
ofthePA09floatingwillcauseoscillationsinsomeapplications.
SOA
5.0
TC = 25°C
4.0
3.5
COMPENSATION
3.0
2.5
The PA09 is extremely flexible in terms of choice of compen-
sation capacitor for any given gain.The most common ranges
areshownintheCOMPENSATꢄONtypicalperformancegraph.
Swinging closer to the supply rails, heavier loads, faster input
signal rise and fall times and higher supply voltages all tend to
demand larger values of compensation capacitor.This capaci-
tor must be rated at least as high as the total voltage applied
to the amplifier. ꢄn making specific value choices, use the
square wave stability test presented in APPꢀꢄCATꢄON NOTE
19, Figures 40 and 41.
2.0
1.5
50 60
70
15
20
25
30
35 40
80
INTERNAL VOLTAGE DROP SUPPLY TO OUTPUT VS –VO (V)
ꢄn addition to small signal testing, if the application includes
step functions in the input signal, use this circuit to measure
large signal response.By increasing square wave amplitude to
the maximum of the application, this test may show significant
distortion of the output waveform following the square wave
transitions. ꢄn this case the faster input stages of the PA09
are out-running the output stage and overload recovery time
creates the distortion. This speed relationship is also why
slew rate does not increase for compensation values below
about 27pF.
SAFEꢀOPERATINGꢀAREAꢀCURVES
The SOA curves combine the effect of these limits and allow
for internal thermal delays. For a given application, the direc-
tion and magnitude of the output current should be calculated
or measured and checked against the SOA curves. This is
simple for resistive loads but more complex for reactive and
EMF generating loads. The following guidelines may save
extensive analytical efforts:
1. Capacitiveandinductiveloadsuptothefollowingmaximums
are safe:
SUPPLYꢀCURRENT
ꢃhen swinging large signals, the output stage of the PA09
demands extra supply current. The following graphs illustrate
this current for several conditions for both sine and square
wave signals. Current is exclusive of any load current and will
affect both supply rating and thermal ratings. ꢃhen calculat-
ing internal power dissipation, multiply this current times total
supply voltage.
±±S
40ꢂ
30ꢂ
20ꢂ
15ꢂ
CAPACITI±E LOAD
INDUCTI±E LOAD
.1µF
500µF
2500µF
∞
11mH
24mH
75mH
100mH
Note that swinging closer to the supply rail demands more
4
PA09U
P r o d u c t I n n o v a t i o n F r o m
PA09 • PA09A
current. Output voltage is given as peak. Currents are aver-
age responding supply readings, but AC monitoring will reveal
current pulses corresponding to periods of high slew rate. For
does not protect the amplifier against transient SOA violations
(areas outside of the TC = 25°C boundary). ꢄt is designed to
protect against short-term fault conditions that result in high
power dissipation within the amplifier, ꢄf the conditions that
cause thermal shutdown are not removed, the amplifier will
oscillate in and out of shutdown. This will result in high peak
power stresses, destroy signal integrity, and reduce the reli-
ability of the device.
QUIESCENT vs. SINE DRIVE
1.5
1.4
S
STABILITY
S
1.3
/23V
O
Due to its large bandwidth the PA09 is more likely to oscillate
thanlowerbandwidthPowerOperationalAmplifiers.Toprevent
oscillationsareasonablephasemarginmustbemaintainedby:
1. Pay very careful attention to supply bypassing and circuit
grounding. This is very important when step functions are
driven and the PA09 shares supplies with more active
devices.
2. Keeping the external sumpoint stray capacitance to ground
at a minimum and the sumpoint load resistance (input and
feedback resistors in parallel) below 500Ω.ꢀarger sumpoint
load resistances can be used with increased phase com-
pensation and/or bypassing of the feedback resistor.
3. Connect the case to a local AC ground potential.
/40V
15V
O
1.2
32V
S
/40V
O
1.1
15V
1.0
100
300
1000
FREQUENCY, F (KHz)
QUIESCENT vs. SQUARE DRIVE
7.0
32VO /40VS
15VO /23VS
CURRENTꢀLIMIT
5.5
4.0
2.5
1.0
ꢄnternal current limiting is provided in the PA09. Note the
current limit curve given under typical performance graphs is
based on junction temperature. ꢄf the amplifier is operated at
cold junction temperatures, current limit could be as high as 8
amps.This is above the maximum allowed current on the SOA
curve of 5 amps. Systems using this part must be designed to
keep the maximum output current to less than 5 amps under all
conditions.The internal current limit only provides this protec-
tion for junction temperatures of 80°C and above.
15VO /40VS
10K
100K
1M
FREQUENCY, F (KHz)
example, driving 30ꢂ outputs at 500KHz on 40ꢂ supplies
produces a .8A pulse during negative slew and a 1.2A pulse
during positive slew.ꢄf the input signal is over driven by several
timestheoutputswingcapability, pulsesupto4Amaybeseen.
THERMALꢀSHUTDOWNꢀPROTECTION
The thermal protection circuit shuts off the amplifier when
the substrate temperature exceeds approximately 150°C.This
allows heatsink selection to be based on normal operating
conditions while protecting the amplifier against excessive
junction temperature during temporary fault conditions.
Thermalprotectionisafairlyslow-actingcircuitandtherefore
PA09U
5
P r o d u c t I n n o v a t i o n F r o m
PA09 • PA09A
ContACting CiRRUs LogiC sUPPoRt
For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact apex.support@cirrus.com.
International customers can also request support by contacting their local Cirrus Logic Sales Representative.
To find the one nearest to you, go to www.cirrus.com
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All other brand and product names in this document may be trademarks or service marks of their respective owners.
6
PA09U
相关型号：
PA09ACE
Operational Amplifier, 1 Func, 500uV Offset-Max, MOS, MBFM8, ROHS COMPLIANT, HERMETIC SEALED, TO-3, 8 PIN
CIRRUS
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