CIRRUS PA15

HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS
PA15 • PA15A
HTTP://WWW.APEXMICROTECH.COM
M I C R O T E C H N O L O G Y
(800) 546-APEX
(800) 546-2739
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
TYPICAL APPLICATION
RF
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 provides flexibility in choosing bandwidth and slew rate for the
application. The 10-pin power SIP package is electrically
isolated.
R1 R2
Q1
C1
8
CC2
Q8
R8
R9
R CL
–V S
1
2
Q12
3
4
5
NC
NC
–VS
PACKAGE: SIP 02
6
7
8
9
C C2 C C1
+VS I LIM
10
OUT
RC
Q13
–IN
+IN
CC
Q14
2
+IN
R10
RCL
Q16
PHASE COMPENSATION
Q15
R11
–VS
5
5
10
OUT
R6
R5
7
2
EXTERNAL CONNECTIONS
R7
Q11
1
–IN
COMPUTER
FOCUS
COMMAND
VOLTAGE
V OUT
ILIM
7
R4
9
CC1
Q5
10
PA15
Q4
Q3
Q6
PIEZO DRIVE
1
Piezo positioning may be applied to the focusing of segmented mirror systems. The composite mirror may be composed 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 increasing circuit density with the SIP package.
R3
Q2
6
R IN
LOW POWER, PIEZOELECTRIC POSITIONING
EQUIVALENT SCHEMATIC
6
+VS
+VS
R12
GAIN
CC
≥1
≥ 10
33pf
OPEN
RC
1KΩ
OPEN
RCL = .6
ICL
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
PA15 • PA15A
SUPPLY VOLTAGE, +VS to –VS
OUTPUT CURRENT, source, sink
POWER DISSIPATION, continuous @ TC = 25°C
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder - 10s max
TEMPERATURE, junction2
TEMPERATURE, storage
OPERATING TEMPERATURE RANGE, case
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
PA15A
PA15
TEST CONDITIONS 1
PARAMETER
450V
See SOA
30W
±25V
±VS
220°C
150°C
–65 to +150°C
–55 to +125°C
MIN
TYP
MAX
2
15
10
75
200
4
50
1011
4
10
50
50
MIN
TYP
MAX
UNITS
.5
5
*
*
*
*
30
*
*
3
20
*
*
*
mV
µV/°C
µV/V
µV/√kh
pA
pA/V
pA
Ω
pF
V
dB
µVrms
*
*
*
*
*
dB
MHz
kHz
°
*
*
20
*
*
V
mA
V/µs
pf
µs
Ω
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE, vs. temperature
OFFSET VOLTAGE, vs. supply
OFFSET VOLTAGE, vs. time
BIAS CURRENT, initial
BIAS CURRENT, vs. supply
OFFSET CURRENT, initial
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
COMMON MODE VOLTAGE RANGE3
COMMON MODE REJECTION, DC
NOISE
Full temperature range
VCM = ±90V
10KHz BW, RS = 1KΩ, CC = OPEN
±VS –15
80
2000
500
*
*
98
2
*
200
GAIN
OPEN LOOP, @ 15Hz
GAIN BANDWIDTH PRODUCT at 1MHz
POWER BANDWIDTH
PHASE MARGIN
RL = 2KΩ, CC = OPEN
RL = 2KΩ, CC = OPEN
RL = 2KΩ, CC = OPEN
Full temperature range
94
111
5.8
24
60
OUTPUT
VOLTAGE SWING3
CURRENT, continuous
SLEW RATE, AV = 100
CAPACITIVE LOAD, AV = +1
SETTLING TIME to .1%
RESISTANCE, no load
IO = ±200mA
CC = OPEN
Full temperature range
CC = OPEN, 2V step
±VS–15 ±VS–10
±200
20
100
2
50
30
*
*
POWER SUPPLY
VOLTAGE 5
CURRENT, quiescent,
See note 5
±50
±150
2.0
±225
3.0
*
*
*
*
*
V
mA
*
*
°C/W
°C/W
°C/W
°C
THERMAL
RESISTANCE, AC, junction to case 4
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE , Case
NOTES:
*
1.
2.
3.
4.
5.
CAUTION
Full temperature range, F > 60Hz
Full temperature range, F < 60Hz
Full temperature range
Meets full range specifications
2.5
4.2
30
–25
*
+85
*
*
The specification of PA15A is identical to the specification for PA15 in applicable column to the left.
Unless otherwise noted: TC = 25°C, compensation = CC = 33pF, RC = 1KΩ, RCL = 0. DC input specifications are ± value given.
Power supply voltage is typical rating.
Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation
to achieve high MTTF.
+VS and –VS denote the positive and negative power supply rail respectively.
Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
Derate max supply rating .625 V/°C below 25°C case. No derating needed above 25°C case.
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 • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
PA15 • PA15A
OPEN LOOP GAIN, A (dB)
20
C C = 33pF
0
VOLTAGE DROP FROM SUPPLY, +VS – VO (V)
–20
10
100 1K 10K .1M 1M
FREQUENCY, F (Hz)
10M
SWING FROM +VS
10
85°C
8
125°C
6
–55°C
4
25°C
2
0
40
80
120
160
LOAD CURRENT, I (mA)
200
HARMONIC DISTORTION
R L = 1KΩ
CC = Open
AV = 30
5 watt
.01
.001
30
90
PHASE, φ (°)
C C = Open
20
10
C C = 33pF
–10
100K
1M
FREQUENCY, F (Hz)
50 mW
100
1K
10K 30K
FREQUENCY, F (Hz)
135
C C = Open
180
270
100K
10M
SWING FROM –VS
24
C C = 33pF
225
0
1M
FREQUENCY, F (Hz)
10M
OPEN LOOP OUTPUT IMPEDANCE
400
20
85°C
16
12
125°C
8
4
–55°C
25°C
0
0
40
80
120
160
LOAD CURRENT, I (mA)
COMMON MODE REJECTION
C C = Open
80
60
40
20
10
1K
10K .1M
100
FREQUENCY, F (Hz)
1M
350
C C = Open
300
250
200
150
100
50
0
10K
200
100
.3
.1
40
OUTPUT IMPEDANCE, R(Ω)
40
45
POWER SUPPLY REJECTION, PSR (dB)
C C = Open
10K
100K 200K
FREQUENCY, F (Hz)
PHASE RESPONSE
50
30
COMMON MODE REJECTION, CMR (dB) VOLTAGE DROP FROM SUPPLY, +VS – VO (V)
OPEN LOOP GAIN, A (dB)
60
OUTPUT VOLTAGE, VO (VPP )
SMALL SIGNAL RESPONSE
en
80
Op
100
=
SMALL SIGNAL RESPONSE
20
2K
pf
TC = -55°C
2.0
100
300
200
400 450
TOTAL SUPPLY VOLTAGE, VS (V)
25
50
75 100 125 150
CASE TEMPERATURE, TC (°C)
100
15
2.2
0
0
TC = 25°C
=
TC = 85°C
pf
8
2.4
33
16
CC
24
TC = 125°C
2.6
CC
32
500
=
QUIESCENT CURRENT, I Q (mA)
2.8
120
DISTORTION, (%)
POWER RESPONSE
QUIESCENT CURRENT
POWER DERATING
40
CC
OUTPUT STAGE
INTERNAL POWER DISSIPATION, P(W)
TYPICAL PERFORMANCE
GRAPHS
100K
1M
FREQUENCY, F (Hz)
3M
POWER SUPPLY REJECTION
120
100
80
60
40
20
0
1
10 100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
OPERATING
CONSIDERATIONS
PA15 • PA15A
GENERAL
INPUT PROTECTION
Please read Application Note 1 “General Operating Considerations”, which covers stability, supplies, heatsinking, mounting, current limit, SOA interpretation, and specification interpretation. Additional information can be found in other application notes. For information on the package outline, heatsinks,
and mounting hardware, consult the “Accessory and Package
Mechanical Data” section of the data book.
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 sufficient (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 required (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.
CURRENT LIMIT
For proper operation, the current limit resistor (RCL) 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
RCL =
ILIM
SAFE OPERATING AREA (SOA)
The MOSFET output stage of this power operational amplifier 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 VS – VO less than 25V.
OUTPUT CURRENT FROM +VS OR –VS, (mA)
500
20
300
0m
10
S
200
0m
S
DC
,T
C
DC
,T
100
C
50
C
25
°C
=
85
°C
DC
,T
=
=
12
5°
C
30
20
10
25
PULSE CURVES @ 10% DUTY CYCLE MAX
POWER SUPPLY PROTECTION
Unidirectional zener diode transient suppressors are recommended 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 reversals 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 recommended phase compensation.
The PA15 is externally compensated and performance can
be tailored to the ap+VS
a.
plication. Use the
graphs of small sigZ1
nal response and
power response as a
6
1
guide. The compen–IN
sation capacitor CC
D1
D2
PA15
must be rated at
D3
D4
+IN
500V working volt2
5
age. An NPO capacitor is recommended.
Z2
The compensation
network CCRC must
–VS
be mounted closely
b.
+VS
to the amplifier pins
Z1
8 and 9 to avoid spurious oscillation.
1
–IN
50
75 100 125
250
500
SUPPLY TO OUTPUT DIFFERENTIAL, VS –VO (V)
6
Q2
Q1
PA15
Q3
+IN
Q4
2
5
Z2
FIGURE 2. OVERVOLTAGE PROTECTION
–VS
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.