PA09A - Apex Microtechnology - searchdatasheet.com

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

Ω

+37V

–37V

470pF

100 Ω

12K

PA09

43781

2pF di

dt = 15A/µs

i = V

13µH

1Ω

FIGURE 1. PA09 AS DEFLECTION AMPLIFIER

FEATURES

• POWER MOS TECHNOLOGY — 2A peak rating

• HIGH GAIN BANDWIDTH PRODUCT — 150MHz

• VERY FAST SLEW RATE — 400V/µs

• 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

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 outstand-

ing 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 as-

sured 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 induc-

tive 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 continu-

ous 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 tempera-

tures. The 8-pin TO-3

package is hermetically

sealed and electrically

isolated. The use of

com-pressible thermal

washers and/or im-

proper mounting torque

will void the product

warranty. Please see

“General Operating

Considerations”.

DEFLECTION AMPLIFIER (Figure 1)

The deflection amplifier circuit of Figure 1 achieves arbitrary

beam positioning for a fast heads-up display. Maximum tran-

sition times are 4µs 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.

EQUIVALENT SCHEMATIC

EXTERNAL CONNECTIONS

Q18

Q15

Q10

Q12B

Q12A

Q13

Q11

Q14

Q16

Q17

Q19

TOP VIEW

678

–V

+IN

–IN

OUT

BAL

= (| +V

| + | –V

|) R

/1.6

NOTE: Input offset voltage trim optional. R

= 10K MAXΩ

PHASE COMPENSATION

100pF

15pF

5pF

none

GAIN

100

1000

200

none

Ω

HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739

MICROTECHNOLOGY

VIDEO POWER OPERATIONAL AMPLIFIERS

PA09 • PA09A

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, +VS to –VS80V

OUTPUT CURRENT, within SOA 5A

POWER DISSIPATION, internal178W

INPUT VOLTAGE, differential 40V

INPUT VOLTAGE, common mode ±VS

TEMPERATURE, pin solder - 10s 300°C

TEMPERATURE, junction1150°C

TEMPERATURE RANGE, storage –65 to +150°C

OPERATING TEMPERATURE RANGE, case –55 to +125°C

PARAMETER TEST CONDITIONS2MIN TYP MAX MIN TYP MAX UNITS

INPUT

OFFSET VOLTAGE, initial TC = 25°C.5± 3 ± .25 ± .5 mV

OFFSET VOLTAGE, vs. temperature TC = 25 to +85°C1030510µV/°C

OFFSET VOLTAGE, vs. supply TC = 25°C10*µV/V

OFFSET VOLTAGE, vs. power TC = 25 to +85°C20*µV/W

BIAS CURRENT, initial TC = 25°C 5 100 3 20 pA

BIAS CURRENT, vs. supply TC = 25°C .01 * pA/V

OFFSET CURRENT, initial TC = 25°C 2.5 50 1.5 10 pA

INPUT IMPEDANCE, DC TC = 25°C10

11 *Ω

INPUT CAPACITANCE TC = 25°C6*pF

COMMON MODE VOLTAGE RANGE3TC = –25 to +85°C± VS–10 ± VS–8 * * V

COMMON MODE REJECTION, DC TC = –25 to +85°C, VCM = ± 20V 104 * dB

GAIN

OPEN LOOP GAIN at 10Hz TC = 25°C, RL = 1kΩ90 * dB

OPEN LOOP GAIN at 10Hz TC = 25°C, RL = 15Ω80 88 * * dB

GAIN BANDWIDTH PRODUCT at 1MHz TC = 25°C, RL = 15Ω, CC = 5pF 150 * MHz

POWER BANDWIDTH, gain of 100 comp TC = 25°C, RL = 15Ω, CC = 5pF 1.2 * MHz

POWER BANDWIDTH, unity gain comp TC = 25°C, RL = 15Ω, CC = 100pF .75 * MHz

OUTPUT

VOLTAGE SWING3TC = –25 to +85°C, IO = 2A ± VS –8 ± VS –7 * * V

CURRENT, PEAK TC = 25°C 4.5 * A

SETTLING TIME to .1% TC = 25°C, 2V step .3 * µs

SETTLING TIME to .01% TC = 25°C, 2V step 1.2 * µs

SLEW RATE, gain of 100 comp TC = 25°C, CC = 5pF 400 * V/µs

SLEW RATE, unity gain comp TC = 25°C, CC = 100pF 75 * V/µs

POWER SUPPLY

VOLTAGE TC = –25 to +85°C± 12 ± 35 ± 40 * * * V

CURRENT, quiescent TC = 25°C7085**mA

THERMAL

RESISTANCE, AC junction to case4TC = –25 to +85°C, F > 60Hz 1.2 1.3 * * °C/W

RESISTANCE, DC junction to case TC = –25 to +85°C, F < 60Hz 1.6 1.8 * * °C/W

RESISTANCE, junction to air TC = –25 to +85°C30*°C/W

TEMPERATURE RANGE, case Meets full range specifications –25 25 + 85 * * * °C

NOTES: * The specification of PA09A is identical to the specification for PA09 in applicable column to the left.

1. Long term operation at the maximum junction temperature will result in reduced product life. Derate power dissipation to

achieve high MTTF.

2. The power supply voltage for all tests is ±35V unless otherwise specified as a test condition.

3. +VS and -VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS.

4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.

PA09A

PA09

PA09 • PA09A

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 850°C to avoid generating toxic fumes.

CAUTION

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

TYPICAL PERFORMANCE

GRAPHS PA09 • PA09A

0 25 50 75 100 125

CASE TEMPERATURE, T

(°C)

POWER DERATING

INTERNAL POWER DISSIPATION, P(W)

–55 100

CURRENT LIMIT

10 100 10K 1M

FREQUENCY, F (Hz)

INPUT NOISE VOLTAGE, V

(nV/ Hz)

100 100M

FREQUENCY, F (Hz)

–20

SMALL SIGNAL RESPONSE

OPEN LOOP GAIN, A (dB)

100

OUTPUT VOLTAGE SWING

100K 300K 3M 30M

FREQUENCY, F (Hz)

OUTPUT VOLTAGE, V (V )

52030

COMPENSATION CAPACITOR, C

(pF)

400

600

SLEW RATE VS. COMP.

SLEW RATE, (V/µs)

300

500

TIME, t (µs)

–30

–20

PULSE RESPONSE

OUTPUT VOLTAGE, V

(V)

–10

100K

COMMON MODE VOLTAGE

COMMON MODE VOLTAGE, V

)

1K 10M

FREQUENCY, F (Hz)

COMMON MODE REJECTION

COMMON MODE REJECTION, CMR (dB)

120

10K 100K 1K FREQUENCY, F(Hz)

POWER SUPPLY REJECTION

POWER SUPPLY REJECTION, PSR (dB)

30 60 80

TOTAL SUPPLY VOLTAGE, V

(V)

1.4

QUIESCENT CURRENT

CURRENT LIMIT, I

LIM

(A)

1.2

10 50 100

INPUT NOISE

√

–25 25 50 75

POWER RESPONSE

0.1.2.3.4

40 50 70

1K 100K

150

OUTPUT CURRENT, I

(A)

VOLTAGE DROP FROM SUPPLY (V)

NORMALIZED QUIESCENT CURRENT, I

(X)

1.0

100

10K 100K 1M 100M

100

10M

200

1.6

JUNCTION TEMPERATURE, T

(°C)

300K 1M 3M 10M 30M

100M

1125

2345

150

100

10M

3100K

.6 .7 .8

= 100pF

= 15pF

= 5pF

| +V

| + | –V

| = 80V

= 100pF

= 15pF

= ±2V, A

= 10, t

= 10ns

| +V

| + | –V

| = 80V

= 100pF

10K 1M 10M

FREQUENCY

(

)

OPERATING

CONSIDERATIONS

PA09 • PA09A

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.

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.

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.

SAFE OPERATING AREA CURVES

The SOA curves combine the effect of these limits and allow

for internal thermal delays. For a given application, the direc-

tion 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 maxi-

mums are safe:

±VSCAPACITIVE LOAD INDUCTIVE LOAD

40V .1µF 11mH

30V 500µF 24mH

20V 2500µF 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.

BYPASSING OF SUPPLIES

Each supply rail must be bypassed to common with a

tantalum capacitor of at least 47µF in parallel with a .47µF

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 limit-

ing 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.

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 insta-

bilities.

THERMAL SHUTDOWN PROTECTION

The thermal protection circuit shuts off the amplifier when

the substrate temperature exceeds approximately 150°C. 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 there-

fore does not protect the amplifier against transient SOA

violations (areas outside of the TC = 25°C 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.

STABILITY

Due to its large bandwidth the PA09 is more likely to oscillate

than lower bandwidth Power Operational Amplifiers. To pre-

vent oscillations a reasonable phase margin must be main-

tained 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 interpo-

late 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 500Ω. Larger sumpoint

load resistances can be used with increased phase com-

pensation and/or bypassing of the feedback resistor.

3. Connect the case to a local AC ground potential.

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 80°C and above.

30 50 80

20 40

2.0

5.0

3.0

4.0

1.5

2.5

3.5

60 70

INTERNAL VOLTAGE DROP SUPPLY TO OUTPUT V

–V

(V)

OUTPUT CURRENT FROM +V

OR –V

(A)

= 25°C

t = 100ms

steady state

t = 300ms

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.