HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER
PA140
M I C R O T E C H N O L O G Y
HTTP://WWW.APEXMICROTECH.COM
(800) 546-APEX
(800) 546-2739
FEATURES
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MONOLITHIC MOS TECHNOLOGY
LOW COST
HIGH VOLTAGE OPERATION—350V, 250V DERATE
LOW QUIESCENT CURRENT—2mA
NO SECOND BREAKDOWN
HIGH OUTPUT CURRENT—120 mA PEAK
APPLICATIONS
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TELEPHONE RING GENERATOR
PIEZO ELECTRIC POSITIONING
ELECTROSTATIC TRANSDUCER & DEFLECTION
DEFORMABLE MIRROR FOCUSING
PACKAGING OPTIONS
7TO-220 Plastic Package (PA140CD)
7TO-220 with staggered Lead Form (PA140CX)
7 DDPAK Surface Mount Package (PA140CC)
TYPICAL APPLICATON
Reference Application Notes 3, 20 and 25.
R
V
IN
20R
20R
20R
+175
2.2K
2.2K
C
C
10pF
A1
PA140
100Ω
330pF
PIEZO
TRANSDUCER
C
S
C
S
C
C
10pF
A2
PA140
100Ω
330pF
R
N
C
N
+175
DESCRIPTION
The PA140 is a high voltage monolithic MOSFET operational
amplifier 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. External compensation provides the
user flexibility in choosing optimum gain and bandwidth
for the application.
The PA140 is packaged in three standard package designs.
The surface mount version of the PA140, the PA140CC, is
an industry standard non-hermetic plastic 7-pin DDPAK. The
through hole versions of the PA140, the PA140CD, and the
PA140CX, are industry standard non-hermetic plastic 7-pin
TO-220 packages. The PA140CX is a staggered lead formed
PA140CD and offers industry standard 100 mil spacing,
this allows for easier PC board layout. (Please reference
to the lead form datasheet drawing LF005 for package
dimensions of the PA140CX.)
High voltage considerations should be taken when designing
board layouts for the PA140. The PA140CD may require a
derate in supply voltage depending on the spacing used for
board layout. The 15-mil and 14-mil minimum spacing of the
7TO-220 and 7DDPAK respectively is adequate to standoff
the 350V rating of the PA140. However, a supply voltage
derate to 250V is required if the spacing of circuit board
artwork is less than 11 mils. In cases where the PA140
is used to its maximum voltage rating, the PA140CX is
recommended given that the staggered lead form allows for
100-mil standard spacing.
The monolithic amplifier is directly attached to the metal
tabs of the PA140CC, PA140CD, and PA140CX. The metal
tabs are directly tied to -V
S
–175
LOW COST 660V p-p
PIEZO DRIVE
–175
EXTERNAL CONNECTIONS
PA140CD
PA140CC
PA140CX
-IN
+IN
+Vs
-Vs
OUT
COMP (RC)
COMP (CC)
PHASE
COMPENSATION
Gain
1
10
30
C
C
18pF
10pF
3.3pF
R
C
2.2K
2.2K
2.2K
C
S
,C
C
ARE RATED
FOR FULL SUPPLY VOLTAGE.
C
C
is NPO
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
-IN
+IN+
+Vs
-Vs
OUT
COMP (RC)
COMP (CC)
-IN
+IN
+Vs
-Vs
OUT
COMP(RC)
COMP(CC)
1
PA140
ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
SUPPLY VOLTAGE, +V
S
to –V
S
DERATED SUPPLY VOLTAGE +V
S
to -V
S
OUTPUT CURRENT, continuous within SOA
OUTPUT CURRENT, peak
6
POWER DISSIPATION, continuous @ T
C
= 25°C
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder – 10 sec
TEMPERATURE, junction
2
TEMPERATURE, storage
TEMPERATURE RANGE, powered (case)
PA140
TEST CONDITIONS
1
MIN
TYP
15
70
20
75
50
2
50
101
1
5
±VS–12
84
94
50
110
MAX
30
130
32
200
20
200
350V
250V
60 mA
120 mA
14W
±16 V
±V
S
220°C
150°C
–65 to +150°C
–40 to +125°C
SPECIFICATIONS
PARAMETER
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE, vs. temperature
4
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 range
COMMON MODE REJECTION, DC
NOISE, broad band
NOISE, low frequency
GAIN
OPEN LOOP at 15Hz
BANDWIDTH, open loop
POWER BANDWIDTH
PHASE MARGIN
OUTPUT
VOLTAGE SWING
CURRENT, peak
5, 6
CURRENT, continuous
SETTLING TIME to .1%
SLEW RATE
CAPACITIVE LOAD
RESISTANCE6, n
o
load
RESISTANCE6, 20
m
A load
POWER SUPPLY
VOLTAGE
3
CURRENT, quiescent
THERMAL
RESISTANCE, AC junction to case
6
RESISTANCE, DC junction to case
6
RESISTANCE, junction to air
TEMPERATURE RANGE, case
NOTES: 1.
2.
3.
4.
5.
6.
UNITS
mV
µV/°C
µV/V
µV kh
pA
pA/V
pA
pF
V
dB
µV RMS
µV p-p
Full temperature range
VCM = ±90V DC
10kHz BW, RS = 1K
1-10 Hz
RL = 5K
CC = 10pf, 280V p-p
Full temperature range
94
106
1.6
26
60
dB
MHz
kHz
°
IO = 40mA
±VS–12
60
±VS–10
120
CC = 10pF, 10V step, AV =
–
10
CC = OPEN
AV = +1
RCL = 0
RCL = 0
12
40
10
150
25
V
mA
mA
µs
V/µs
nF
See Note 3
±50
±150
1.6
±175
2.0
V
mA
F > 60Hz
F < 60Hz
Full temperature range
Meets full range specifications
5.9
7.7
–25
25
6.85
8.9
+85
°C/W
°C/W
°C/W
°C
Unless otherwise noted T
C
= 25°C, C
C
= 18pF, R
C
= 2.2K. 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.
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.
Since the PA140 has no current limit, load impedance must be large enough to limit output current to 120mA.
CAUTION
The PA140 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
2
TYPICAL PERFORMANCE
GRAPHS
PA140
0
–30
–60
PHASE,
ϕ
(°)
–90
–120
–150
–180
C
C
= 18pF
C
C
= 3.3pF
INTERNAL POWER DISSIPATION, P(W)
POWER DERATING
16
14
12
10
8
6
4
2
PHASE RESPONSE
400
C
C
= 3.3pF
C
C
= 10pF
C
C
= 18pF
OUTPUT VOLTAGE, V
O
(V
PP
)
POWER RESPONSE
R
L
= 10K
Ω
200
C
C
= 10pF
100
80
60
40
C
C
= 18pF
20
10K 20K30K 50K .1M .2M .3M .5M
FREQUENCY, F (Hz)
C
C
= 3.3pF
0
0
25
50
75
100
TEMPERATURE, Tj (°C)
125
–210
C
C
= 10pF
1
10 100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
1M
120
OPEN LOOP GAIN, A(dB)
100
C
C
= 3.3pF
SLEW RATE, V/µs
80
60
40
C
C
= 18pF
20
0
1
10 100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
POWER SUPPLY REJECTION, PSR (dB)
C
C
= 10pF
SLEW RATE
60
50
40
30
20
10
0
0
4
8
12
16
20
COMPENSATION CAPACITANCE, C
C
(pf)
NORMALIZED QUIESCENT CURRENT, (%)
SMALL SIGNAL RESPONSE
QUIESCENT CURRENT
150
130
110
T
C
90
=8
5
°
C
5
°
C
5
°
C
T
C
70
=2
T
C
= -2
–20
50
100 150
200
300
350
250
TOTAL SUPPLY VOLTAGE, V
S
(V)
HARMONIC DISTORTION
1.0
.6
.4
DISTORTION, (%)
.2
.1
.06
.04
.02
A
V
= 20
C
C
= 3.3pf
R
L
= 2K
Ω
V
O
= 30V
PP
V
O
= 180V
PP
V
O
= 60V
PP
POWER SUPPLY REJECTION
120
100
80
60
40
20
0
1
10
100 1K 10K .1M
FREQUENCY, F (Hz)
1M
–V
S
+V
S
VOLTAGE DROP FROM SUPPLY, V
S
– V
O
(V)
OUTPUT VOLTAGE SWING
18
16
14
12
10
8
6
4
2
0
85
°
C
– OU
T
– OUT
25
°
C
– OUT
–25
°
C
.01
.006
.004
.002
100 200 1K 3K 10K 30K 100K
FREQUENCY, F (Hz)
120
100
80
60
40
20
0
1
10
100 1K 10K .1M
FREQUENCY, F (Hz)
1M
T
–25
°C
+OU
85
°C
+OUT
25°C +OUT
0
20
40
60 80 100 120
OUTPUT CURRENT, I
O
(mA)
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
COMMON MODE REJECTION, CMR (dB)
COMMON MODE REJECTION
3
PA140
GENERAL
Please read Application Note 1 "General Operating
Considerations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specification
interpretation. Visit www.apexmicrotech.com for design tools
that help automate tasks.
OPERATING
CONSIDERATIONS
heatsink on the backside of the FR4/PC board, or copper
slug. Do not allow the temperature to exceed 85°C. The
heatslug is tied internally to -V
S
.
Avoid bending the leads. Such action can lead to internal
damage.
EQUIVALENT SCHEMATIC
3
INPUT PROTECTION
The PA140 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
exceeding 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 expected. Limiting input current to 1mA will
prevent damage.
D1
Q1
Q2
Q3
Q4
1
+V
S
I
OUT
5
Q5
6
Q6
–IN
D2
2
COMP
D3
D4
D5
COMP Q8
7
+IN
Q11
Q12
Q13
Q10
Q14
–V
S
4
STABILITY
The PA140 has sufficient phase margin when compensated
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 1K 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.
The PA140 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 C
C
must be rated at 350V. The compensation
capacitor and associated resistor R
C
must be mounted closely
to the amplifier pins to avoid spurious oscillation. An NPO
capacitor is recommended for compensation. The PA140
monolithic amplifier uses an all NMOS output topology that
presents a special stability problem. An output snubber
network of 330pF and 100Ω in series from the output to –V
S
will eliminate this problem. This network is not required if the
load capacitance is greater than 330pF.
SUB
SAFE OPERATING AREA (SOA)
The MOSFET output stage of this power operational
amplifier has two distinct limitations:
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 energy
flyback, external fast-recovery diodes should be used.
200
OUTPUT CURRENT FROM +V
S
OR –V
S
, (mA)
120
100
PA140 SOA
200mS
300mS
50
40
30
20
DC
,T
DC
C
=
,T
C=
85
°
C
25
°
C
10
MOUNTING
The PA140CC 7-pin DDPAK surface mountable package
has a large exposed integrated copper heatslug to which
the monolithic amplifier is directly attached. The PA140CC
requires surface mount techniques of heatsinking. A solder
connection to an area of 1 to 2 square inches of foil is
recommended for circuit board layouts. This may be adequate
heatsinking but the large number of variables involved
suggests temperature measurements to be made on the top
of the package. Surface mount techniques include the use
of a surface mount fan in combination with a surface mount
5
4
3
2
10
20
30
50
100
200 300
500
APPLICATION REFERENCES:
For additional technical information please refer to the
following Application Notes:
AN 01: General Operating Considerations
AN 25: Driving Capacitive Loads
AN 38: Loop Stability with Reactive Loads
APEX MICROTECHNOLOGY CORPORATION
• 5980 NORTH
REV. C AUGUST 2002
•
©
TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
PA140U
SHANNON ROAD
2002 Apex Microtechnology Corp.
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.
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