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 COST
LOW QUIESCENT CURRENT -- 3.0mA MAX
HIGH OUTPUT CURRENT -- 200mA
PROGRAMMABLE CURRENT LIMIT
APPLICATIONS
PIEZOELECTRIC POSITIONING
HIGH VOLTAGE INSTRUMENTATION
ELECTROSTATIC TRANSDUCERS
PROGRAMMABLE POWER SUPPLIES UP TO 440V
DESCRIPTION
The PA15 is a high voltage, low quiescent current MOSFET
operational amplifier designed as a low cost solution for driving
continuous output currents up to 200mA and pulse currents up
to 350mA into capacitive loads. The safe operating area (SOA)
has no second breakdown limitations and can be observed for
all type loads by choosing an appropriate current limiting
resistor. The MOSFET input stage has integrated static and
differential mode protection. The MOSFET output stage is
biased AB for linear operation. External compensation pro-
vides flexibility in choosing bandwidth and slew rate for the
application. The 10-pin power SIP package is electrically
isolated.
EQUIVALENT SCHEMATIC
Q1
Q2
6
1
2
5
9
8
10
7
R1 R2
C1
R3
Q3
CC1
CC2
Q6
Q5
R5
R8
R9
Q15
R11
R12
Q16
Q12
Q8
R4
R7
Q4
ILIM
OUT
Q14
R10
Q13
Q11
+V
S
IN
+IN
V
S
R6
LOW POWER, PIEZOELECTRIC POSITIONING
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 PA15 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.
EXTERNAL CONNECTIONS
PACKAGE: SIP 02
F
R
PA15
IN
R
PIEZO DRIVE
S
V
S
+V
OUT
V
COMPUTER
FOCUS
COMMAND
VOLTAGE
CL
R
10
7
5
2
1
6
R
CL
C
C
1
2
3
4
5
6
7
8
9
10
IN
+IN
NC
V
+V
C
C1
I
LIM
C
C2
R
C
OUT
NC
S
S
PHASE COMPENSATION
GAIN
C
C
R
C
1
33pf
1K
10
OPEN
OPEN
R
CL
=
.6
I
CL
H T T P : / / W W W . A P E X M I C R O T E C H . C O M ( 8 0 0 ) 5 4 6 - A P E X ( 8 0 0 ) 5 4 6 - 2 7 3 9
M I C R O T E C H N O L O G Y
HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS
PA15 PA15A
TYPICAL APPLICATION
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 USA APPLICATIONS HOTLINE: 1 (800) 546-2739
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +V
S
to V
S
450V
OUTPUT CURRENT, source, sink
See SOA
POWER DISSIPATION, continuous @ T
C
= 25
C
30W
INPUT VOLTAGE, differential
25V
INPUT VOLTAGE, common mode
V
S
TEMPERATURE, pin solder - 10s max
220
C
TEMPERATURE, junction
2
150
C
TEMPERATURE, storage
65 to +150
C
OPERATING TEMPERATURE RANGE, case
55 to +125
C
PA15 PA15A
SPECIFICATIONS
PARAMETER
TEST CONDITIONS
1
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
INPUT
OFFSET VOLTAGE, initial
2
10
.5
3
mV
OFFSET VOLTAGE, vs. temperature
Full temperature range
15
50
5
20
V/
C
OFFSET VOLTAGE, vs. supply
10
50
*
*
V/V
OFFSET VOLTAGE, vs. time
75
*
V/
kh
BIAS CURRENT, initial
200
2000
*
*
pA
BIAS CURRENT, vs. supply
4
*
pA/V
OFFSET CURRENT, initial
50
500
30
200
pA
INPUT IMPEDANCE, DC
10
11
*
INPUT CAPACITANCE
4
*
pF
COMMON MODE VOLTAGE RANGE
3
V
S
15
*
V
COMMON MODE REJECTION, DC
V
CM
=
90V
80
98
*
*
dB
NOISE
10KHz BW, R
S
= 1K
, C
C
= OPEN
2
*
Vrms
GAIN
OPEN LOOP, @ 15Hz
R
L
= 2K
, C
C
= OPEN
94
111
*
*
dB
GAIN BANDWIDTH PRODUCT at 1MHz R
L
= 2K
, C
C
= OPEN
5.8
*
MHz
POWER BANDWIDTH
R
L
= 2K
, C
C
= OPEN
24
*
kHz
PHASE MARGIN
Full temperature range
60
*
OUTPUT
VOLTAGE SWING
3
I
O
=
200mA
V
S
15
V
S
10
*
*
V
CURRENT, continuous
200
*
mA
SLEW RATE, A
V
= 100
C
C
= OPEN
20
20
30
V/
s
CAPACITIVE LOAD, A
V
= +1
Full temperature range
100
*
pf
SETTLING TIME to .1%
C
C
= OPEN, 2V step
2
*
s
RESISTANCE, no load
50
*
POWER SUPPLY
VOLTAGE
5
See note 5
50
150
225
*
*
*
V
CURRENT, quiescent,
2.0
3.0
*
*
mA
THERMAL
RESISTANCE, AC, junction to case
4
Full temperature range, F > 60Hz
2.5
*
C/W
RESISTANCE, DC, junction to case
Full temperature range, F < 60Hz
4.2
*
C/W
RESISTANCE, junction to air
Full temperature range
30
*
C/W
TEMPERATURE RANGE , Case
Meets full range specifications
25
+85
*
*
C
PA15A
PA15
NOTES:
*
The specification of PA15A is identical to the specification for PA15 in applicable column to the left.
1.
Unless otherwise noted: T
C
= 25
C, compensation = C
C
= 33pF, R
C
= 1K
, R
CL
= 0. 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.
3.
+V
S
and V
S
denote the positive and negative power supply rail respectively.
4.
Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
5.
Derate max supply rating .625 V/
C below 25
C case. No derating needed above 25
C case.
CAUTION
The PA15 is constructed from MOSFET transistors. ESD handling procedures must be observed.
The exposed substrate contains beryllia (BeO). Do not crush, machine, or subject to temperatures in excess of 850
C to
avoid generating toxic fumes.
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
TYPICAL PERFORMANCE
GRAPHS
PA15 PA15A
100K
1M
FREQUENCY, F (Hz)
270
45
PHASE RESPONSE
PHASE, (
)
100K
10M
FREQUENCY, F (Hz)
10
0
30
SMALL SIGNAL RESPONSE
OPEN LOOP GAIN, A (dB)
10
20
40
50
10
1M
FREQUENCY, F (Hz)
20
80
COMMON MODE REJECTION
COMMON MODE REJECTION, CMR (dB)
40
60
100
1
1M
FREQUENCY, F (Hz)
0
20
120
POWER SUPPLY REJECTION
POWER SUPPLY REJECTION, PSR (dB)
40
80
OUTPUT IMPEDANCE, R(
)
3M
10K
100K
FREQUENCY, F (Hz)
HARMONIC DISTORTION
DISTORTION, (%)
.1
.3
30K
100
1K
10K
100
300
TOTAL SUPPLY VOLTAGE, V (V)
2.0
OPEN LOOP OUTPUT IMPEDANCE
QUIESCENT CURRENT, I (mA)
Q
2.4
S
1K
10K
VOLTAGE DROP FROM SUPPLY, +V V (V)
SO
10
100
1K 10K .1M
60
2.2
.001
1M
225
180
450
2.6
2.8
1M
.01
100
135
100
.1M
10M
200
400
T = 85
C
C
T = 25
C
C
T = -55
C
C
T = 125
C
C
C = Open
C
QUIESCENT CURRENT
0
50
100
150
200
250
300
350
400
10M
SWING FROM V
S
0
40
200
LOAD CURRENT, I (mA)
80
120
160
0
16
24
8
20
4
12
125
C
85
C
25
C
55
C
125
C
85
C
55
C
25
C
SWING FROM +V
S
0
40
160
200
LOAD CURRENT, I (mA)
80
120
R
L
= 1K
C
C
= Open
A
V
= 30
5 watt
50 mW
2K
100K
FREQUENCY, F (Hz)
20
500
OUTPUT VOLTAGE, V (V )
O
POWER RESPONSE
PP
10K
100
C = Open
C
C = 15pf
C
2
10
4
8
6
VOLTAGE DROP FROM SUPPLY, +V V (V)
SO
200K
30
FREQUENCY, F (Hz)
C = Open
C
C = 33pF
C
C = Open
C
10
10M
FREQUENCY, F (Hz)
20
0
60
SMALL SIGNAL RESPONSE
OPEN LOOP GAIN, A (dB)
20
40
80
120
10K
100
C = 33pF
C
C = Open
C
C = 33pF
C
C = Open
C
90
100
1K
.1M
1M
C = 33pf
C
0
25
50
75
100
125
150
CASE TEMPERATURE, T (
C)
0
8
24
32
POWER DERATING
OUTPUT STAGE
INTERNAL POWER DISSIPATION, P(W)
16
40
C
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.
PA15U REV. D MARCH 1999
1999 Apex Microtechnology Corp.
OPERATING
CONSIDERATIONS
PA15 PA15A
GENERAL
Please read Application Note 1 "General Operating Consid-
erations", which covers stability, supplies, heatsinking, mount-
ing, current limit, SOA interpretation, and specification inter-
pretation. Additional information can be found in other applica-
tion notes. For information on the package outline, heatsinks,
and mounting hardware, consult the "Accessory and Package
Mechanical Data" section of the data book.
CURRENT LIMIT
For proper operation, the current limit resistor (R
CL
) must be
connected as shown in the external connection diagram. The
minimum value is 2 ohm, however for optimum reliability the
resistor value should be set as high as possible. The value is
calculated as follows; with the maximum practical value of 150
ohms.
.6
R
CL
=
I
LIM
SAFE OPERATING AREA (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.
NOTE: The output stage is protected against transient flyback.
However, for protection against sustained, high energy flyback,
external fast-recovery diodes should be used. Pulsed output
currents may not reach 350 mA with V
S
V
O
less than 25V.
INPUT PROTECTION
Although the PA15 can withstand differential input voltages
up to
25V, additional external protection is recommended. In
most applications 1N4148 or 1N914 signal diodes are suffi-
cient (D1-D4 in Figure 2a). In more demanding applications
where low leakage or low capacitance are of concern 2N4416
or 2N5457-2N5459 JFETs connected as diodes will be re-
quired (Q1-Q4 in Figure 2b). In either case the input differential
voltage will be clamped to
1.4V. This is sufficient overdrive to
produce maximum power bandwidth.
POWER SUPPLY PROTECTION
Unidirectional zener diode transient suppressors are recom-
mended as protection on the supply pins. The zeners clamp
transients to voltages within the power supply rating and also
clamp power supply reversals to ground. Whether the zeners
are used or not, the system power supply should be evaluated
for transient performance including power-on overshoot and
power-off polarity reversals as well as line regulation.
Conditions which can cause open circuits or polarity rever-
sals on either power supply rail should be avoided or protected
against. Reversals or opens on the negative supply rail are
known to induce input stage failure. Unidirectional transzorbs
prevent this, and it is desirable that they be both electrically and
physically as close to the amplifier as possible.
STABILITY
The PA15 has sufficient phase margin to be stable with most
capacitive loads at a gain of 10 or more, using the recom-
mended phase compensation.
The PA15 is externally compensated and performance can
be tailored to the ap-
plication. Use the
graphs of small sig-
nal response and
power response as a
guide. The compen-
sation capacitor C
C
must be rated at
500V working volt-
age. An NPO capaci-
tor is recommended.
The compensation
network C
C
R
C
must
be mounted closely
to the amplifier pins
8 and 9 to avoid spu-
rious oscillation.
FIGURE 2. OVERVOLTAGE PROTECTION
PA15
+V
S
IN
+IN
Z1
Z2
D4
D3
6
5
1
2
+V
S
Z1
Z2
6
5
PA15
a.
b.
V
S
V
S
D2
D1
IN
+IN
1
2
Q1
Q2
Q3
Q4
SUPPLY TO OUTPUT DIFFERENTIAL, V
S
V
O
(V)
25
50
75
100
250
500
OUTPUT CURRENT FROM +V
S
OR V
S
, (mA)
10
20
30
50
100
200
300
500
DC, T
C
= 125C
DC, T
C
= 85C
200mS
PULSE CURVES @ 10% DUTY CYCLE MAX
DC, T
C
= 25C
100mS
125
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