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VIDEO POWER OPERATIONAL AMPLIFIERS
PA09 * PA09A
MICROTECHNOLOGY
HTTP://WWW.APEXMICROTECH.COM
(800) 546-APEX
(800) 546-2739
FEATURES
* * * * * * * POWER MOS TECHNOLOGY -- 2A peak rating HIGH GAIN BANDWIDTH PRODUCT -- 150MHz VERY FAST SLEW RATE -- 400V/s PROTECTED OUTPUT STAGE -- Thermal shutoff EXCELLENT LINEARITY -- Class A/B output WIDE SUPPLY RANGE -- 12V to 40V LOW BIAS CURRENT, LOW NOISE -- FET input
APPLICATIONS
* * * * * VIDEO DISTRIBUTION AND AND AMPLIFICATION HIGH SPEED DEFLECTION CIRCUITS POWER TRANSDUCERS TO 5MHz COAXIAL LINE DRIVERS POWER LED OR LASER DIODE EXCITATION
DEFLECTION AMPLIFIER (Figure 1)
The deflection amplifier circuit of Figure 1 achieves arbitrary beam positioning for a fast heads-up display. Maximum transition times are 4s while delivering 2A pk currents to the 13mH coil. The key to this circuit is the sense resistor (RS) which converts yoke current to voltage for op amp feedback. This negative feedback forces the coil current to stay exactly proportional to the control voltage. The network consisting of RD, RF and CF serves to shift from a current feedback via RS to a direct voltage feedback at high frequencies. This removes the extra phase shift caused by the inductor thus preventing oscillation. See Application Note 5 for details of this and other precision magnetic deflection circuits.
DESCRIPTION
The PA09 is a high voltage, high output current operational amplifier optimized to drive a variety of loads from DC through the video frequency range. Excellent input accuracy is achieved with a dual monolithic FET input transistor which is cascoded by two high voltage transistors to provide outstanding common mode characteristics. All internal current and voltage levels are referenced to a zener diode biased on by a current source. As a result, the PA09 exhibits superior DC and AC stability over a wide supply and temperature range. High speed and freedom from second breakdown is assured by a complementary Power MOS output stage. For optimum linearity, especially at low levels, the Power MOS transistors are biased in the class A/B mode. Thermal shutoff provides full protection against overheating and limits the heatsink requirements to dissipate the internal power losses under normal operating conditions. A built-in current limit protects the amplifier against overloading. Transient inductive load kickback protection is provided by two internal clamping diodes. External phase compensation allows the user maximum flexibility in obtaining the optimum slew rate and gain bandwidth product at all gain settings. For continuous operation under load, a heatsink of proper rating is recommended. This hybrid integrated circuit utilizes thick film (cermet) resistors, ceramic capacitors and silicon semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The 8-pin TO-3 +37V di package is hermetically = 15A /s CC 2pF dt sealed and electrically 3 7 isolated. The use of 4 i = Vi /RS V 8 com-pressible thermal I 1 PA09 washers and/or im5 CF LY proper mounting torque 470pF 13H 6 will void the product RD 1 warranty. Please see -37V RF 12K "General Operating 100 R Considerations".
.5
S
EQUIVALENT SCHEMATIC
2 3
D1 Q5 Q3 Q1
7 8
C1
Q2 Q4 Q6 Q7
1
Q13 Q8 Q12A
5
Q9 C2 Q12B Q10
Q11 Q14
Q17 Q19 Q16
4
D3 Q15 Q18 D2
6
EXTERNAL CONNECTIONS
+VS
3
BAL
2 1
PHASE COMPENSATION OUT GAIN 1 10 100 1000 CC 100pF 15pF 5pF none RC 200 0 0 none
RT +IN RS -IN
4
TOP VIEW
5 6 8 7
CC RC RS = (| +VS | + | -VS |) RT /1.6 RC NOTE: Input offset voltage trim optional. RT = 10K MAX
-VS
CC
FIGURE 1. PA09 AS DEFLECTION AMPLIFIER
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
PA09 * PA09A
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +VS to -VS OUTPUT CURRENT, within SOA POWER DISSIPATION, internal1 INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder - 10s TEMPERATURE, junction1 TEMPERATURE RANGE, storage OPERATING TEMPERATURE RANGE, case PA09 TEST CONDITIONS
2
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
80V 5A 78W 40V VS 300C 150C -65 to +150C -55 to +125C PA09A MAX MIN TYP MAX UNITS
SPECIFICATIONS
PARAMETER INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply OFFSET VOLTAGE, vs. power BIAS CURRENT, initial BIAS CURRENT, vs. supply OFFSET CURRENT, initial INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE3 COMMON MODE REJECTION, DC GAIN OPEN LOOP GAIN at 10Hz OPEN LOOP GAIN at 10Hz GAIN BANDWIDTH PRODUCT at 1MHz POWER BANDWIDTH, gain of 100 comp POWER BANDWIDTH, unity gain comp OUTPUT VOLTAGE SWING3 CURRENT, PEAK SETTLING TIME to .1% SETTLING TIME to .01% SLEW RATE, gain of 100 comp SLEW RATE, unity gain comp POWER SUPPLY VOLTAGE CURRENT, quiescent THERMAL RESISTANCE, AC junction to case4 RESISTANCE, DC junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case NOTES: * 1. 2. 3. 4. TC = -25 to +85C, F > 60Hz TC = -25 to +85C, F < 60Hz TC = -25 to +85C Meets full range specifications TC = -25 to +85C TC = 25C 12 TC = -25 to +85C, IO = 2A TC = 25C TC = 25C, 2V step TC = 25C, 2V step TC = 25C, CC = 5pF TC = 25C, CC = 100pF TC = 25C, RL = 1k TC = 25C, RL = 15 TC = 25C, RL = 15, CC = 5pF TC = 25C, RL = 15, CC = 5pF TC = 25C, RL = 15, CC = 100pF 80 TC = 25C TC = 25 to +85C TC = 25C TC = 25 to +85C TC = 25C TC = 25C TC = 25C TC = 25C TC = 25C TC = -25 to +85C TC = -25 to +85C, VCM = 20V MIN
TYP
.5 10 10 20 5 .01 2.5 1011 6 VS-10 VS-8 104
3 30 100 50 *
.25 5 * * 3 * 1.5 * * * *
.5 10 20 10
mV V/C V/V V/W pA pA/V pA pF V dB
90 88 150 1.2 .75
*
* * * * *
dB dB MHz MHz MHz
VS -8 VS -7 4.5 .3 1.2 400 75
*
* * * * * *
V A s s V/s V/s
35 70
40 85
*
* *
* *
V mA
-25
1.2 1.6 30 25
1.3 1.8 + 85 *
* * * *
* * *
C/W C/W C/W C
The specification of PA09A is identical to the specification for PA09 in applicable column to the left. Long term operation at the maximum junction temperature will result in reduced product life. Derate power dissipation to achieve high MTTF. The power supply voltage for all tests is 35V unless otherwise specified as a test condition. +VS and -VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to -VS. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or subject to temperatures in excess of 850C to avoid generating toxic fumes.
CAUTION
APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739
TYPICAL PERFORMANCE GRAPHS
PA09 * PA09A
CURRENT LIMIT
9 8
CURRENT LIMIT, ILIM (A) NORMALIZED QUIESCENT CURRENT, IQ (X)
INTERNAL POWER DISSIPATION, P(W)
80 70 60 50 40 30 20 10 0 0
POWER DERATING
1.6 1.4 1.2
QUIESCENT CURRENT
7 6 5 4 3 2 1 -55 -25 0 25 50 75 100 125 JUNCTION TEMPERATURE, Tj (C)
1.0 .8 .6 40 50 70 30 60 80 TOTAL SUPPLY VOLTAGE, VS (V) 70
25 50 75 100 125 150 CASE TEMPERATURE, TC (C)
OUTPUT VOLTAGE, VO (VPP )
OPEN LOOP GAIN, A (dB)
80 60 40
CC = 5pF CC = 15pF
VOLTAGE DROP FROM SUPPLY (V)
100
SMALL SIGNAL RESPONSE
10 9 8 7 6 5 4 3 0
OUTPUT VOLTAGE SWING
POWER RESPONSE
50 40 30
CC
CC = 100pF 20 0 -20 100 1K 10K 100K 1M 10M 100M FREQUENCY, F (Hz)
20 15 10
2 3 4 1 OUTPUT CURRENT, IO (A)
5
| +VS | + | -VS | = 80V 7 100K 300K 1M 3M 10M FREQUENCY, F (Hz)
500
OUTPUT VOLTAGE, VO (V)
Vin = 2V, AV = 10, tr = 10ns 20 10 0 -10 -20 -30
INPUT NOISE VOLTAGE, VN (nV/ Hz)
600
SLEW RATE VS. COMP.
30
PULSE RESPONSE
INPUT NOISE
30 20 15 10 7 5 3 10 1K 100 10K 100K FREQUENCY, F (Hz) 1M
CC
=1 5pF
=1
00p F
30M
SLEW RATE, (V/s)
400 300
200 150
100 5 20 30 10 50 100 COMPENSATION CAPACITOR, CC(pF)
COMMON MODE REJECTION, CMR (dB) POWER SUPPLY REJECTION, PSR (dB)
0
.1
.2
.3 .4 .5 TIME, t (s)
.6
.7
.8
120 100 80 60 40 20 1K
100 80 60 40
COMMON MODE VOLTAGE, VCM (VPP)
COMMON MODE REJECTION
POWER SUPPLY REJECTION
COMMON MODE VOLTAGE
70 50 40 30 20 15 10 7 100K 300K 1M 3M 10M 30M | +VS | + | -VS | = 80V
CC= 100pF
20 0 1K
10M 100M 10K 100K 1M FREQUENCY, F (Hz)
10M 100M 10K 100K 1M FREQUENCY, F(Hz)
FREQUENCY, F(Hz)
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
PA09 * PA09A
GENERAL
Please read the "General Operating Considerations" section, which covers stability, supplies, heatsinking, mounting, current limit, SOA interpretation, and specification interpretation. 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.
OPERATING CONSIDERATIONS
tantalum capacitor of at least 47F in parallel with a .47F ceramic capacitor directly connected from the power supply pins to the ground plane.
OUTPUT LEADS
Keep the output leads as short as possible. In the video frequency range, even a few inches of wire have significant inductance, raising the interconnection impedance and limiting the output current slew rate. Furthermore, the skin effect increases the resistance of heavy wires at high frequencies. Multistrand Litz Wire is recommended to carry large video currents with low losses.
SUPPLY VOLTAGE
The specified voltage (VS) applies for a dual () supply having equal voltages. A nonsymmetrical (ie. +70/-10V) or a single supply (ie. 80V) may be used as long as the total voltage between the +VS and -VS rails does not exceed the sum of the voltages of the specified dual supply.
GROUNDING
Single point grounding of the input resistors and the input signal to a common ground plane will prevent undesired current feedback, which can cause large errors and/or instabilities.
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.
THERMAL SHUTDOWN PROTECTION
The thermal protection circuit shuts off the amplifier when the substrate temperature exceeds approximately 150C. This allows heatsink selection to be based on normal operating conditions while protecting the amplifier against excessive junction temperature during temporary fault conditions. Thermal protection is a fairly slow-acting circuit and therefore does not protect the amplifier against transient SOA violations (areas outside of the TC = 25C boundary). It is designed to protect against short-term fault conditions that result in high power dissipation within the amplifier, If the conditions that cause thermal shutdown are not removed, the amplifier will oscillate in and out of shutdown. This will result in high peak power stresses, destroy signal integrity, and reduce the reliability of the device.
SAFE OPERATING AREA CURVES
OUTPUT CURRENT FROM +VS OR -VS (A)
5.0 4.0 3.5 3.0 2.5 2.0 1.5 TC = 25C
t=
t= 30
10
0m
s
0m
s
st
ea
dy
st
at
e
STABILITY
Due to its large bandwidth the PA09 is more likely to oscillate than lower bandwidth Power Operational Amplifiers. To prevent oscillations a reasonable phase margin must be maintained by: 1. Selection of the proper phase compensation capacitor and resistor. Use the values given in the table under external connections on the first page of this data sheet and interpolate if necessary. The phase margin can be increased by using a larger capacitor and a smaller resistor than the slew rate optimized values listed in the table. 2. Keeping the external sumpoint stray capacitance to ground at a minimum and the sumpoint load resistance (input and feedback resistors in parallel) below 500. Larger sumpoint load resistances can be used with increased phase compensation and/or bypassing of the feedback resistor. 3. Connect the case to a local AC ground potential.
50 60 70 80 20 25 30 35 40 15 INTERNAL VOLTAGE DROP SUPPLY TO OUTPUT VS -VO (V)
The SOA curves combine the effect of these limits and allow for internal thermal delays. For a given application, the direction and magnitude of the output current should be calculated or measured and checked against the SOA curves. This is simple for resistive loads but more complex for reactive and EMF generating loads. The following guidelines may save extensive analytical efforts: 1. Capacitive and inductive loads up to the following maximums are safe: VS CAPACITIVE LOAD INDUCTIVE LOAD 40V .1F 11mH 30V 500F 24mH 20V 2500F 75mH 15V 100mH 2. Short circuits to ground are safe with dual supplies up to 20V. 3. The output stage is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used.
CURRENT LIMIT
Internal current limiting is provided in the PA09. Note the current limit curve given under typical performance graphs is based on junction temperature. If the amplifier is operated at cold junction temperatures, current limit could be as high as 8 amps. This is above the maximum allowed current on the SOA curve of 5 amps. Systems using this part must be designed to keep the maximum output current to less than 5 amps under all conditions. The internal current limit only provides this protection for junction temperatures of 80C and above.
BYPASSING OF SUPPLIES
Each supply rail must be bypassed to common with a
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. PA09U REV. H FEBRUARY 1998 (c) 1998 Apex Microtechnology Corp.

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