PA42 [APEX]
HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS; 高压功率运算放大器
| 型号： | PA42 |
| 厂家： | 
CIRRUS LOGIC |
| 描述： | HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS |
| 文件： | 总4页 (文件大小：113K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS
PA41/PA42 • PA41A/PA42A
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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
TYPICAL APPLICATION
20R
20R
20R
R
APPLICATIONS
VIN
• PIEZO ELECTRIC POSITIONING
+175
+175
• ELECTROSTATIC TRANSDUCER & DEFLECTION
• DEFORMABLE MIRROR FOCUSING
• BIOCHEMISTRY STIMULATORS
2.2K
2.2K
10pF
10pF
A1
PA41/42
A2
PA41/42
• COMPUTER TO VACUUM TUBE INTERFACE
Rn
Cn
RCL
180
RCL
180
PIEZO
TRANSDUCER
100 Ω
100 Ω
DESCRIPTION
330pF
330pF
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.
LOW COST 660V p-p
PIEZO DRIVE
–175
–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
RCL
PHASE
The PA42 is packaged in APEX’s hermetic ceramic SIP10
package.
CC
COMPENSATION
RC
Gain
CC
18pF
10pF
RC
COMP
1
2
1
≥10
2.2KΩ
2.2KΩ
3
COMP
4
ILIM
EQUIVALENT SCHEMATIC
≥30
3.3pF
2.2KΩ
(6)
8
OUT
CS
330pF
+V
TOP VIEW
S
D1
5
CS , CC ARE NPO RATED
FOR FULL SUPPLY VOLTAGE.
Q1
8
–IN
RS
100 Ω
Q2
6
Q3
+VS
7
ILIM
1
3
I LIM
RCL
=
–VS
+IN
(7)
PA41
PA42
Q4
Q5
Q7
(8)
2
Q6
Q8
(1) 5
–IN
TOP VIEW
4
(10)
COMP
OUT
1
2
3
4
5
6
7
8
9
10
Q9
COMP
(9)
D2 D3 D4 D5
3
(2)
6
CC CC
RC
NC NC –VS
+VS ILIM
OUT
+IN
RS
100Ω
CS
Q11
Q12
Q10
Q13
–IN +IN
CC
330pf
Q14
RCL
–VS
7
NOTE: PA41 Recommended mounting torque is 4-7 in•lbs
(5)
(.45 -.79 N•m)
5
PA41 PIN NUMBER
PA42 PIN NUMBER
(1)
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 prodlit@apexmicrotech.com
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
PA41/PA42 • PA41A/PA42A
PA41/PA41A
PA42/PA42A
SUPPLY VOLTAGE, +VS to –VS
OUTPUT CURRENT, continuous within SOA
OUTPUT CURRENT, peak
POWER DISSIPATION, continuous @ TC = 25°C 12W
INPUT VOLTAGE, differential
350V
60 mA
120 mA
350V
ABSOLUTE MAXIMUM RATINGS
60 mA
120 mA
9W
±16 V
±16 V
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder – 10 sec
TEMPERATURE, junction2
TEMPERATURE, storage
TEMPERATURE RANGE, powered (case)
±VS
±VS
300°C
220°C
150°C
–65 to +150°C
–40 to +125°C
150°C
–65 to +150°C
–40 to +125°C
SPECIFICATIONS
PA41/PA42
PA41A/PA42A
PARAMETER
TEST CONDITIONS1
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
INPUT
OFFSET VOLTAGE, initial
25
70
20
75
40
130
32
15
40/*
30
65/*
*
mV
µV/°C
µV/V
µV √kh
pA
pA/V
pA
Ω
OFFSET VOLTAGE, vs. temperature4, 7 Full temperature range
OFFSET VOLTAGE, vs supply
OFFSET VOLTAGE, vs time
*
*
*
*
*
*
*
BIAS CURRENT, initial7
5/100 50/2000
.2/.5 .5/50
*
*
*
BIAS CURRENT, vs supply
OFFSET CURRENT, initial7
2.5/100 50/400
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
1011
5
pF
COMMON MODE, voltage range
COMMON MODE REJECTION, DC
NOISE, broad band
NOISE, low frequency
±VS–12
84
*
*
V
dB
µV RMS
µV p-p
VCM = ±90V DC
10kHz BW, RS = 1KΩ
1-10 Hz
94
50
110
*
*
*
GAIN
OPEN LOOP at 15Hz
BANDWIDTH, open loop
POWER BANDWIDTH
PHASE MARGIN
RL = 5KΩ
94
106
1.6
26
*
*
*
*
*
dB
MHz
kHz
°
CC = 10pf, 280V p-p
Full temperature range
60
OUTPUT
VOLTAGE SWING
IO = 40mA
±VS–12 ±VS–10
120
±VS–10 ±VS–8.5
V
mA
mA
µs
V/µs
nF
Ω
CURRENT, peak5
*
*
*
*
*
*
*
CURRENT, continuous
SETTLING TIME to .1%
SLEW RATE
CAPACITIVE LOAD
RESISTANCE 6, no load
RESISTANCE 6, 20mA load
60
CC = 10pF, 10V step, AV = –10
CC = OPEN
AV = +1
RCL = 0
RCL = 0
12
40
10
150
25
Ω
POWER SUPPLY
VOLTAGE3
See Note 3
±50
±150
±175
*
*
*
V
CURRENT, quiescent
1.6
2.0
.9
1.4
1.8
mA
THERMAL
PA41 RESISTANCE, AC junction to case F > 60Hz
PA42 RESISTANCE, AC junction to case F > 60Hz
PA41 RESISTANCE, DC junction to case F < 60Hz
PA42 RESISTANCE, DC junction to case F < 60Hz
5.4
7
9
12
30
55
6.5
10
10.4
14
*
*
*
*
*
*
*
*
*
*
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C
PA41 RESISTANCE, junction to air
PA42 RESISTANCE, junction to air
TEMPERATURE RANGE, case
Full temperature range
Full temperature range
Meets full range specifications
–25
+85
*
*
NOTES:
*
The specification for PA41A/PA42A is identical to the specification for PA41/PA42 in applicable column to the left.
1.
Unless otherwise noted TC = 25°C, CC = 18pF, RC = 2.2KΩ. DC input specifications are ± value given. Power supply voltage is
typical rating.
2.
Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation
to achieve high MTTF. For guidance, refer to heatsink data sheet.
3.
4.
5.
6.
7.
Derate maximum supply voltage .5 V/°C below case temperature of 25°C. No derating is needed above TC = 25°C.
Sample tested by wafer to 95%.
Guaranteed but not tested.
The selected value of RCL must be added to the values given for total output resistance.
Specifications separated by / indicate values for the PA41 and PA42 respectively.
CAUTION
The PA41/PA42 is constructed from MOSFET transistors. ESD handling procedures must be observed.
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
TYPICAL PERFORMANCE
GRAPHS
PA41/PA42 • PA41A/PA42A
POWER DERATING
CURRENT LIMIT
CURRENT LIMIT
140
130
15
12
9
60
40
20
0
T = TC
T = TC
+ILIM
PA41
PA42
120
110
100
–ILIM
+ILIM
6
T = TA
T = TA
–20
-ILIM
3
0
90
80
–40
–60
0
25
50
75
100
125
–50 –25
0
25 50 75 100 125
0
100
200
300
400
500
TEMPERATURE, T (°C)
CASE TEMPERATURE, TC (°C)
CURRENT LIMIT RESISTOR, RCL (Ω)
SMALL SIGNAL RESPONSE
PHASE RESPONSE
POWER RESPONSE
0
120
100
80
400
RL = 10K Ω
CC = 3.3pF
–30
–60
CC = 3.3pF
CC = 10pF
200
CC = 10pF
CC = 18pF
CC = 10pF
–90
60
40
20
100
80
CC = 3.3pF
CC = 18pF
CC = 3.3pF
–120
–150
–180
–210
60
CC = 18pF
40
0
CC = 10pF
CC = 18pF
–20
20
1
10 100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
1
10 100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
10K 20K30K 50K .1M
.2M.3M .5M 1M
FREQUENCY, F (Hz)
HARMONIC DISTORTION
SLEW RATE
QUIESCENT CURRENT
1.0
60
50
40
150
AV = 20
CC = 3.3pf
RL = 2K Ω
.6
.4
130
110
90
.2
.1
VO = 30VPP
.06
.04
VO = 180VPP
30
20
VO = 60VPP
.02
.01
.006
.004
C
°
70
50
10
0
C = -25
250
T
.002
100 200 1K 3K 10K 30K 100K
FREQUENCY, F (Hz)
0
4
8
12
16
20
100 150
200
300
350
COMPENSATION CAPACITANCE, CC (pf)
TOTAL SUPPLY VOLTAGE, VS (V)
COMMON MODE REJECTION
POWER SUPPLY REJECTION
OUTPUT VOLTAGE SWING
120
18
120
16
14
100
80
100
80
+VS
12
10
8
60
60
40
–VS
40
6
4
20
0
20
0
2
0
25°C +OUT
1
10 100 1K 10K .1M 1M
FREQUENCY, F (Hz)
1
10 100 1K 10K .1M 1M
FREQUENCY, F (Hz)
0
20
40
60 80 100 120
OUTPUT CURRENT, IO (mA)
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
OPERATING
CONSIDERATIONS
PA41/PA42 • PA41A/PA42A
The PA41/42 is externally compensated and performance
can be tailored to the application. Use the graphs of small
signal gain and phase response as well as the graphs for slew
rate and power response as a guide. The compensation
capacitor CC must be rated at 350V working voltage. The
compensation capacitor and associated resistor RC must be
mounted closely to the amplifier pins to avoid spurious oscilla-
tion. An NPO capacitor is recommended for compensation.
GENERAL
Please read Application Note 1 "General Operating Consid-
erations" which covers stability, supplies, heat sinking, mount-
ing, current limit, SOA interpretation, and specification inter-
pretation. Visit www.apexmicrotech.com for design tools that
help automate tasks such as calculations for stability, internal
power dissipation, current limit; heat sink selection; Apex’s
complete Application Notes library; Technical Seminar Work-
book; and Evaluation Kits.
SAFE OPERATING AREA (SOA)
The MOSFET output stage of this power operational ampli-
fier has two distinct limitations:
CURRENT LIMIT
For proper operation the current limit resistor, RCL, must be
connected as shown in the external connection diagram. The
minimum value is 18 ohms, however for optimum reliability the
resistor value should be set as high as possible. The value can
be estimated as follows with the maximum practical value of
1. The current handling capability of the die metallization.
2. The temperature of the output MOSFETs.
NOTE: The output stage is protected against transient
flyback. However, for protection against sustained, high en-
ergy flyback, external fast-recovery diodes should be used.
500 ohms.
3
RCL
=
ILIM
Use the typical performance graphs as a guide for expected
variations in current limit value with a given RCL and variations
over temperature. The selected value of RCL must be added to
the specified typical value of output resistance to calculate the
total output resistance. Since the load current passes through
RCL the value selected also affects the output voltage swing
according to:
PA41 SOA
200
120
200mS
100
300mS
VR = IO RCL
*
50
40
where VR is the voltage swing reduction.
30
When the amplifier is current limiting, there may be small
signal spurious oscillation present during the current limited
portion of the negative half cycle. The frequency of the oscil-
lation is not predictable and depends on the compensation,
gain of the amplifier, and load. The oscillation will cease as the
amplifier comes out of current limit.
20
10
5
4
INPUT PROTECTION
3
The PA41/42 inputs are protected against common mode
voltages up the supply rails and differential voltages up to ±16
volts as well as static discharge. Differential voltages exceed-
ing 16 volts will be clipped by the protection circuitry. However,
if more than a few milliamps of current is available from the
overload source, the protection circuitry could be destroyed.
The protection circuitry includes 300 ohm current limiting
resistors at each input, but this may be insufficient for severe
overloads. It may be necessary to add external resistors to the
application circuit where severe overload conditions are ex-
pected. Limiting input current to 1mA will prevent damage.
PULSE CURVES @ 10% DUTY CYCLE MAX
2
10
20 30
50
100
200 300
500
SUPPLY TO OUTPUT DIFFERENTIAL, VS -VO (V)
PA42 SOA
200
120
100
50
40
30
STABILITY
20
The PA41/42 has sufficient phase margin when compen-
sated for unity gain to be stable with capacitive loads of at least
10 nF. However, the low pass circuit created by the sumpoint
(–in) capacitance and the feedback network may add phase
shift and cause instabilities. As a general rule, the sumpoint
load resistance (input and feedback resistors in parallel)
should be 5K ohm or less at low gain settings (up to 10).
Alternatively, use a bypass capacitor across the feedback
resistor. The time constant of the feedback resistor and
bypass capacitor combination should match the time constant
of the sumpoint resistance and sumpoint capacitance.
10
5
4
3
PULSE CURVES @ 10% DUTY CYCLE MAX
2
10
20 30
50
100
200 300
500
SUPPLY TO OUTPUT DIFFERENTIAL, VS -VO (V)
This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice.
PA41/42U REV. G JANUARY 1999 © 1999 Apex Microtechnology Corp.
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