APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
FEATURES
HIGH VOLTAGE -- 400V (
200V)
LOW QUIESCENT CURRENT -- 10mA
HIGH OUTPUT CURRENT -- 8A
PROGRAMMABLE CURRENT LIMIT
APPLICATIONS
PIEZOELECTRIC POSITIONING
HIGH VOLTAGE INSTRUMENTATION
ELECTROSTATIC TRANSDUCERS
PROGRAMMABLE POWER SUPPLIES UP TO 390V
DESCRIPTION
The PA93 is a high voltage, low quiescent current MOSFET
operational amplifier designed as a low cost solution for driving
continuous output currents up to 8A and pulse currents up to
14A. The safe operating area (SOA) has no second break-
down limitations and can be observed for all type loads by
choosing an appropriate current limiting resistor. The MOSFET
output stage is biased AB for linear operation. External com-
pensation provides flexibility in choosing bandwidth and slew
rate for the application. APEX's Power SIP package uses a
minimum of board space allowing for high density circuit
boards.
EQUIVALENT SCHEMATIC
Q1
Q2
R1 R2
C1
R3
Q3
CC1
12
11
1
4
5
9
6
10
2
7
8
CC2
3
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
I
Q
R6
TYPICAL APPLICATION
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 PA93 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.
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 AMPLIFIER
PA93
F
R
PA93
IN
R
1
2
6
7,8
9,10
11,12
PIEZO DRIVE
S
V
S
+V
OUT
V
COMPUTER
FOCUS
COMMAND
VOLTAGE
CL
R
PHASE COMPENSATION
GAIN
Cc*
Rc
1
220pF
100
100
0
0
100pF
47pF
10pF
2
4
17
*Cc Never to be < 10pF. Cc To be rated for the full supply
voltage +V to Vs. Use ceramic NPO (COG) type.
1
2
3
4
5
6
7
8
9
10
IN
+IN
R
CL
+Vs
Vs
TO LOAD
AND FEEDBACK
(See text.)
11
12
Rc
Cc
*
*
* Bypassing required.
I
Q
EXTERNAL CONNECTIONS
Package: SIP03
LOW POWER, PIEZOELECTRIC POSITIONING
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
400V
OUTPUT CURRENT, source, sink, peak
14A, within SOA
POWER DISSIPATION, continuous @ T
C
= 25
C
125W
INPUT VOLTAGE, differential
20V
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
PA93
SPECIFICATIONS
PARAMETER
TEST CONDITIONS
1
MIN
TYP
MAX
UNITS
INPUT
OFFSET VOLTAGE, initial
2
10
mV
OFFSET VOLTAGE, vs. temperature
Full temperature range
15
50
V/
C
OFFSET VOLTAGE, vs. supply
10
25
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
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
100KHz BW, R
S
= 1K
, C
C
= 10pF
1
Vrms
GAIN
OPEN LOOP, @ 15Hz
R
L
= 2K
, C
C
= 10pF
94
111
dB
GAIN BANDWIDTH PRODUCT at 1MHz R
L
= 2K
, C
C
= 10pF
12
MHz
POWER BANDWIDTH
R
L
= 2K
, C
C
= 10pF
30
kHz
PHASE MARGIN
Full temperature range
60
OUTPUT
VOLTAGE SWING
3
I
O
= 8A
V
S
12
V
S
10
V
CURRENT, continuous
8
A
SLEW RATE, A
V
= 100
C
C
= 10pF
50
V/
s
CAPACITIVE LOAD, A
V
= +1
Full temperature range
1
nf
SETTLING TIME to .1%
C
C
= 10pF, 2V step
1
s
RESISTANCE, no load
10
POWER SUPPLY
VOLTAGE
5
See note 5
40
150
200
V
CURRENT, quiescent,
10
14
mA
THERMAL
RESISTANCE, AC, junction to case
4
Full temperature range, F > 60Hz
.7
C/W
RESISTANCE, DC, junction to case
Full temperature range, F < 60Hz
1
C/W
RESISTANCE, junction to air
Full temperature range
30
C/W
TEMPERATURE RANGE, case
Meets full range specifications
25
+85
C
NOTES: 1.
Unless otherwise noted: T
C
= 25
C, DC input specifications are
value given. Power supply voltage is typical rating. R
C
= 100
C
C
= 220pF.
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 PA93 is constructed from MOSFET transistors. ESD handling procedures must be observed.
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
TYPICAL PERFORMANCE
GRAPHS
PA93
0
25
50
75
100
125
CASE TEMPERATURE, T (
C )
0
75
100
POWER DERATING
INTERNAL POWER DISSIPATION
100k
FREQUENCY F (Hz)
135
90
PHASE RESPONSE
PHASE, (
)
100K
FREQUENCY, F (Hz)
10
0
30
SMALL SIGNAL RESPONSE
OPEN LOOP GAIN, A (dB)
10
20
40
50
0
6
8
OUTPUT CURRENT, I (A)
7
9
OUTPUT VOLTAGE SWING
6
8
1M
FREQUENCY, F (Hz)
10
OUTPUT VOLTAGE, V (V )
O
100
400
0
.2
.3
.5
.6
RESISTOR VALUE, R (
)
0
2
8
CURRENT LIMIT
CURRENT LIMIT, I (A)
LIM
4
6
10
60
EXT. COMPENSATION CAPACITOR, C (pF)
1
SLEW RATE
SLEW RATE, (V/ S)
4
3
2
60
100
200 300
20
40
0
50
100
CASE TEMPERATURE, Tc (
C)
1.2
NORMALIZED QUIES. CURRENT
NORMALIZED QUIESCENT CURRENT, I (X)
Q
1.0
CL
.1
.4
O
2
VOLTAGE DROP FROM SUPPLY, V V (V)
SO
225
50
25
125
POWER RESPONSE
PP
75
C
1M
10M
270
180
C
125
1.4
1.8
1.6
4
5
100K
40
20
10
8
6
30
30
1K
10K
1M
10M
C = 220pF
C
C = 100pF
C
C = 47pF
C
C
C = 10pF
Cc = 220 pF
Cc = 100 pF
Cc = 47 pF
Cc = 10 pF
Cc = 220 pF
Cc = 100 pF
Cc = 47 pF
Cc = 10 pF
10
100
10K
100K
FREQUENCY, F (Hz)
INPUT NOISE VOLTAGE, V (nV Hz)
FREQUENCY, F (Hz)
HARMONIC DISTORTION
DISTORTION, (%)
.01
.1
10K
100
1K
INPUT NOISE VOLTAGE
1K
2
7
10
20
5
3
15
N
.001
Po = 1W
Po = 20W
Po = 62W
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.
PA93U REV. B MARCH 1999
1999 Apex Microtechnology Corp.
OPERATING
CONSIDERATIONS
PA93
SUPPLY TO OUTPUT DIFFERENTIAL, V
S
V
O
(V)
10
20
30 40
100
200
300
500
OUTPUT CURRENT FROM +V
S
OR V
S
, (A)
.1
.08
.06
.6
.4
.3
.2
.8
3
2
1
4
6
8
20
10
DC,T
C
= 125
C
100mS
60 80
200mS
DC, T
C
= 25
C
DC,T
C
= 85
C
GENERAL
Please read the "General Operating Considerations" sec-
tion, which covers stability, supplies, heatsinking, mounting,
current limit, SOA interpretation, and specification interpreta-
tion. Additional information can be found in the application
notes. For information on the package outline, heatsinks, and
mounting hardware, consult the "Accessory and Package
Mechanical Data" section of the handbook.
CURRENT LIMIT
For proper operation, the current limit resistor (R
CL
) must be
connected as shown in the external connection diagram. 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 16 ohms.
.65
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.
SAFE OPERATING CURVES
The safe operating area curves define the maximum addi-
tional internal power dissipation the amplifier can tolerate
when it produces the necessary output to drive an external
load.
INPUT PROTECTION
Although the PA93 can withstand differential voltages up to
20V, additional external protection is recommended. Low
leakage, low capacitance JFETs connected as diodes are
recommended (e.g. 2N4416, Q1-Q4 in Figure 2). The differen-
tial input 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. See Figure 2. 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 is
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 PA93 is externally compensated and performance can
be tailored to the application. Use the graphs of small signal
response and power response as a guide. The compensation
capacitor C
C
must be rated at 500V working voltage. An NPO
capacitor is recommended. The compensation network C
C
R
C
must be mounted closely to the amplifier pins 4 and 5 to avoid
spurious oscillation.
QUIESCENT CURRENT REDUCTION
When pin 3 (I
Q
) is shorted to pin 5 (CC2) the AB biasing of
the output stage is disabled. This lowers quiescent power but
also raises distortion since the output stage is then class C
biased. The output stage bias current is nominally set at 1mA.
Pin 3 may be left open if not used.
+V
S
IN
+IN
Z1
Z2
11, 12
7, 8
1
2
6
PA93
Q1
Q2
V
S
Q3
Q4
FIGURE 2.
OVERVOLTAGE
PROTECTION
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