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HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER
PA40
MICROTECHNOLOGY
HTTP://WWW.APEXMICROTECH.COM
(800) 546-APEX
(800) 546-2739
FEATURES
* * * * * * MONOLITHIC MOS TECHNOLOGY LOW COST HIGH VOLTAGE OPERATION--250V LOW QUIESCENT CURRENT--2mA NO SECOND BREAKDOWN HIGH OUTPUT CURRENT--120 mA PEAK
APPLICATIONS
* * * * TELEPHONE RING GENERATOR PIEZO ELECTRIC POSITIONING ELECTROSTATIC TRANSDUCER & DEFLECTION DEFORMABLE MIRROR FOCUSING
DESCRIPTION
The PA40 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 PA40 is packaged in Apex's 7 LEAD TO220 package. The metal back of the package is tied to -Vs. The 15 mil minimum spacing of the TO220 package is adequate to stand-off the 250V rating of the PA40. The user must insure that a minimum of 11 mils spacing is maintained between pins for the circuit board artwork. If spacing is less than 11 mils, the voltage must be derated.
EQUIVALENT SCHEMATIC
3
D1 Q1 Q2 Q3 Q4
1
+VS
IOUT
5
Q5
6
Q6
-IN D2
2
COMP D3 D4 D5 COMP Q8
7
+IN Q11 Q12 Q13 Q10 Q14 -VS
4
TYPICAL APPLICATION
2.67K 140V IN6300A 15V 2.5K + 15 .22 MUR130 3.3pF 10K 4 7
PA40
100K
SUB
EXTERNAL CONNECTIONS
2.2K 90Vrms
10K 5
6
MUR120
ICL8038 8
2
PHASE COMPENSATION
IN6300A 100 .22 330pf 82K
10 * * 1.5 F @ 16Hz 1.2 F @ 20Hz
11

Gain 1 10 30
CC 18pF 10pF 3.3pF
RC 2.2K 2.2K 2.2K
MUR120 -15V
-140V
MUR130
Telephone Ring Generator
NOTE: At gains above 30, Rc and Cc may be omitted.
1 - IN 2 + IN 3 +VS 4 -VS 5 OUT 6 COMP (Rc) 7 COMP (Cc)
The PA40 is set for a gain of 38.5 boosting the 2.33V signal to 90V. The recommended compensation for gains above 30 is used. If capacitive loading is at least 330pF at all times, the recommended snubber network may be omitted.
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
PA40
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +VS to -VS OUTPUT CURRENT, continuous within SOA OUTPUT CURRENT, peak POWER DISSIPATION, continuous @ TC = 25C INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder - 10 sec TEMPERATURE, junction2 TEMPERATURE, storage TEMPERATURE RANGE, powered (case)
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
250V 60 mA 120 mA 14W 16 V VS 220C 150C -65 to +150C -40 to +125C
SPECIFICATIONS
PARAMETER INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature4 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, peak5 CURRENT, continuous SETTLING TIME to .1% SLEW RATE CAPACITIVE LOAD RESISTANCE6, n o load RESISTANCE6, 20 mA load POWER SUPPLY VOLTAGE3 CURRENT, quiescent THERMAL RESISTANCE, AC junction to case6 RESISTANCE, DC junction to case6 RESISTANCE, junction to air TEMPERATURE RANGE, case NOTES: 1. 2. 3. 4. 5. TEST CONDITIONS
1
PA40
MIN TYP 15 70 20 75 50 2 50 1011 5 VS-12 84 94 50 110 MAX 30 130 32 200 20 200 UNITS mV V/C V/V V kh pA pA/V pA pF V dB V RMS V 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 s V/s nF
See Note 3
50 1.6
125 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 TC = 25C, CC = 18pF, RC = 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 25C. No derating is needed above TC = 25C. Sample tested by wafer to 95%. Guaranteed but not tested.
CAUTION
The PA40 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
PA40
0 -30 -60 PHASE, () -90 -120 -150 -180 CC = 18pF CC = 3.3pF
INTERNAL POWER DISSIPATION, P(W)
POWER DERATING
16 14 12 10 8 6 4 2
PHASE RESPONSE
400 CC = 3.3pF CC = 10pF CC = 18pF OUTPUT VOLTAGE, VO (VPP )
POWER RESPONSE
R L = 10K
200 CC = 10pF 100 80 60 40 CC = 18pF 20 10K 20K30K 50K .1M .2M .3M .5M FREQUENCY, F (Hz) CC = 3.3pF
0 0 25 50 75 100 TEMPERATURE, Tj (C) 125
-210
CC = 10pF 1 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz)
1M
120 OPEN LOOP GAIN, A(dB) 100 CC = 3.3pF SLEW RATE, V/s 80 60 40 CC = 18pF 20 0 1 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) POWER SUPPLY REJECTION, PSR (dB) CC = 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
TC
90
=8
5C
5C
5C
TC
70
=2
TC
= -2
-20
50 100 150 200 300 350 250 TOTAL SUPPLY VOLTAGE, VS (V)
HARMONIC DISTORTION
1.0 .6 .4 DISTORTION, (%) .2 .1 .06 .04 .02 AV = 20 CC = 3.3pf R L = 2K VO = 30VPP VO = 180VPP VO = 60VPP
POWER SUPPLY REJECTION
120 100 80 60 40 20 0 1 10 100 1K 10K .1M FREQUENCY, F (Hz) 1M -VS +VS
VOLTAGE DROP FROM SUPPLY, VS - VO (V)
OUTPUT VOLTAGE SWING
18 16 14 12 10 8 6 4 2 0
T - OU 85C
- OUT 25C - OUT -25C
.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 -25C +OU 85C +OUT
25C +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
PA40
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 such as calculations for stability, internal power dissipation, current limit; heat sink selection; Apex's complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits.
OPERATING CONSIDERATIONS
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.
INPUT PROTECTION
The PA40 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.
200 OUTPUT CURRENT FROM +VS OR -VS, (mA) 120 100
PA40 SOA
200mS 300mS
50 40 30 20
DC
,T
DC
C
=
,T C=
85
C
25
C
STABILITY
The PA40 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 PA40 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 250V working voltage. The compensation capacitor and associated resistor RC must be mounted closely to the amplifier pins to avoid spurious oscillation. An NPO capacitor is recommended for compensation.
10
5 4 3 2 10 20 30 50 100 200 300 500
This MICROTECHNOLOGY CORPORATION * to be NORTH SHANNON ROAD assumed for possible inaccuracies * USA * All specifications HOTLINE: 1 (800) 546-2739 APEXdata sheet has been carefully checked and is believed 5980reliable, however, no responsibility*is TUCSON, ARIZONA 85741 or omissions.APPLICATIONSare subject to change without notice. PA40U REV. B JUNE 2001 (c) 2001 Apex Microtechnology Corp.

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