Apex PA19A, PA19 Datasheet

VIDEO POWER OPERATIONAL AMPLIFIERS

MICROTECHNOLOGY

HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX [phone]

FEA TURES

• VERY FAST SLEW RATE — 900 V/µs

• POWER MOS TECHNOLOGY — 4A peak rating

• LOW INTERNAL LOSSES — 2V at 2A

• PROTECTED OUTPUT STAGE — Thermal Shutoff

• WIDE SUPPLY RANGE — ±15V TO ±40V

APPLICATIONS

• VIDEO DISTRIBUTION AND AMPLIFICATION

• HIGH SPEED DEFLECTION CIRCUITS

• POWER TRANSDUCERS UP TO 5 MHz

• MODULATION OF RF POWER STAGES

• POWER LED OR LASER DIODE EXCITATION

DESCRIPTION

The PA19 is a high voltage, high 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 PA19 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 a 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 of

0.5A can be increased with the addition of two external
resistors. 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. A heatsink of proper rating is recommended.

This hybrid 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
package is hermetically sealed and electrically isolated. The
use of compressible thermal washers and/or improper mount­ing torque will void the product warranty. Please see “General
Operating Considerations”.

PA19 • PA19A

TYPICAL APPLICATION

This fast power driver utilizes the 900V/µs slew rate of the
PA19 and provides a unique interface with a current output
DAC. By using the DAC’s internal 1KΩ feedback resistor,
temperature drift errors are minimized, since the temperature
drift coefficients of the internal current source and the internal
feedback resistor of the DAC are closely matched. Gain of

to IIN is –6.5/mA. The DAC’s internal 1K resistor together

V

OUT

with the external 500Ω and 110Ω form a “tee network” in the
feedback path around the PA19. This effective resistance
equals 6.5KΩ . Therefore the entire circuit can be modeled as

6.5KΩ feedback resistor from output to inverting input and a
5mA current source into the inverting input of the PA19. Now
we see the familiar current to voltage conversion for a DAC
where V

EQUIVALENT SCHEMATIC

3

Q3

8

Q12

5

Q17A

4

6

OUT

Q5

Q23

= –IIN x R

Q4

Q10

Q13

Q17B

FEEDBACK

Q16

Q8

.

Q11

D2

Q20

D1

Q24

Q25

Q1

Q9

Q15

Q2

Q21

Q22

2

Q7

1

Q19

7

TYPICAL

+40V

Ω110

APPLICATION

R

PA19

–40V

CL+

5.6pF

R

CL–

±5mA

1K

DAC

PA19 AS FAST POWER DRIVER

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE [phone] • FAX [phone] • ORDERS [phone] • EMAIL [e-mail]

Ω500

±32.5V

Up to 4A

EXTERNAL CONNECTIONS

R

CL+

+V

+IN

–IN

–V

2

3

4

TOP

VIEW

5

6

OUT

1

C

C

8

7

R

CL–

PHASE COMPENSATION

GAIN

100

1000

10

C

C

330pF

1

22pF

2.2pF
none

P A19 • P A19A

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

SUPPLY VOLTAGE, +VS to –V
OUTPUT CURRENT, within SOA 5A

S

80V

POWER DISSIPATION, internal 78W
INPUT VOLTAGE, differential 40V
INPUT VOLTAGE, common mode ±V
TEMPERATURE, pin solder — 10 sec 300°C
TEMPERATURE, junction

1

S

150°C
TEMPERATURE, storage –65 to 155°C
OPERATING TEMPERATURE RANGE, case –55 to 125°C

SPECIFICATIONS

PARAMETER TEST CONDITIONS

PA19

2

MIN TYP MAX MIN TYP MAX UNITS

PA19A

INPUT

OFFSET VOLTAGE, initial TC = 25°C ±.5 ±3 ±.25 ±.5 mV
OFFSET VOLTAGE, vs. temperature TC = 25°C to +85°C1030510µV/°C
OFFSET VOLTAGE, vs. supply TC = 25°C10*µV/V
OFFSET VOLTAGE, vs. power TC = 25°C to +85°C20*µV/W
BIAS CURRENT, initial TC = 25°C 10 200 5 50 pA
BIAS CURRENT, vs. supply TC = 25°C .01 * pA/V
OFFSET CURRENT, initial TC = 25°C 5 100 3 25 pA
INPUT IMPEDANCE, DC TC = 25°C10

11

*MΩ
INPUT CAPACITANCE TC = 25°C6*pF
COMMON MODE VOLTAGE RANGE3TC = 25°C to +85°C ±VS–15 ±VS–12 * * V
COMMON MODE REJECTION, DC TC = 25°C to +85°C, VCM = ±20V 70 104 * * dB

GAIN

OPEN LOOP GAIN at 10Hz TC = 25°C, RL = 1KΩ 111 * dB
OPEN LOOP GAIN at 10Hz TC = 25°C, RL = 15Ω 74 78 * * dB
GAIN BANDWIDTH PRODUCT at 1MHz TC = 25°C, CC = 2.2pF 100 * MHz
POWER BANDWIDTH, AV = 100 TC = 25°C, CC = 2.2pF 3.5 * MHz
POWER BANDWIDTH, AV = 1 TC = 25°C, CC = 330pF 250 * kHz

OUTPUT

VOLTAGE SWING
VOLTAGE SWING
VOLTAGE SWING

3
3
3

TC = 25°C, IO = 4A ±VS–5 ±VS–4 * * V
TC = 25°C to +85°C, IO = 2A ±VS–3 ±VS–2 * * V

TC = 25°C to +85°C, IO = 78mA ±VS–1 ±VS–.5 * * V
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, AV = 100 TC = 25°C, CC = 2.2pF 600 900 800 * V/µs
SLEW RATE, AV = 10 TC = 25°C, CC = 22pF 650 * V/µs

POWER SUPPLY

VOLTAGE TC = 25°C to +85°C ±15 ±35 ±40 * * * V
CURRENT, quiescent TC = 25°C 100 120 * * mA

THERMAL

RESISTANCE, AC, junction to case

4

TC = 25°C to +85°C, F > 60Hz 1.2 1.3 * * °C/W
RESISTANCE, DC, junction to case TC = 25°C to +85°C, F < 60Hz 1.6 1.8 * * °C/W
RESISTANCE, junction to air TC = 25°C to +85°C30*°C/W
TEMPERATURE RANGE, case Meets full range specifications –25 +85 * * °C

NOTES: * The specification of PA19A is identical to the specification for PA19 in applicable column to the left.

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

2. The power supply voltage for all specifications is the TYP rating unless noted 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.

CAUTION

APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: [phone]

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.