PA85A Cirrus Logic Inc, PA85A Datasheet

PA85A

Manufacturer Part Number

PA85A

Description

OP AMP HV 1KV/US TO-3-8 CE SG

Manufacturer

Cirrus Logic Inc

Series

Apex Precision Power™r

Datasheets

1.PA85.pdf (5 pages)

2.PA85.pdf (3 pages)

Specifications of PA85A

Amplifier Type

Power

Number Of Circuits

Slew Rate

1000 V/µs

Gain Bandwidth Product

100MHz

Current - Input Bias

3pA

Voltage - Input Offset

250µV

Current - Supply

21mA

Current - Output / Channel

200mA

Voltage - Supply, Single/dual (±)

30 V ~ 450 V, ±15 V ~ 225 V

Operating Temperature

-25°C ~ 85°C

Mounting Type

Through Hole

Package / Case

TO-3-8

Number Of Channels

Voltage Gain Db

111 dB

Common Mode Rejection Ratio (min)

90 dB

Input Offset Voltage

0.5 mV

Maximum Operating Temperature

+ 85 C

Mounting Style

Through Hole

Maximum Dual Supply Voltage

+/- 225 V

Minimum Operating Temperature

- 25 C

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Output Type

-3db Bandwidth

Lead Free Status / Rohs Status

Details

Other names

598-1327

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

PA85A

Manufacturer:

APEX

Quantity:

20 000

Current page: 1 of 5
Download datasheet (415Kb)

–IN

FEATURES

• HIGH VOLTAGE — 450V (±225V)

• HIGH SLEW RATE — 1000V/μS

• HIGH OUTPUT CURRENT — 200mA

APPLICATIONS

• HIGH VOLTAGE INSTRUMENTATION

• PIEZO TRANSDUCER EXCITATION

• PROGRAMMABLE POWER SUPPLIES UP TO 430V

• ELECTROSTATIC TRANSDUCERS & DEFLECTION

DESCRIPTION

operational amplifier designed for output currents up to 200mA.

Output voltages can swing up to ±215V with a dual supply

and up to +440 volts with a single supply. The safe operating

area (SOA) has no second breakdown limitations and can be

observed with all types of loads by choosing an appropriate cur-

rent limiting resistor. High accuracy is achieved with a cascode

input circuit configuration. All internal biasing is referenced to a

bootstrapped zener-MOSFET current source. As a result, the

PA85 features an unprecedented supply range and excellent

supply rejection. The MOSFET output stage is biased on for

linear operation. External compensation provides user flexibility.

capacitors and silicon semiconductor chips to maximize reli-

ability, minimize size and give top performance. Ultrasonically

bonded aluminum wires provide reliable interconnections at all

operating temperatures. The 8-pin TO-3 package is hermeti-

cally sealed and electrically isolated. The use of compressible

isolation washers voids the warranty.

EQUIVALENT SCHEMATIC

PA85U

The PA85 is a high voltage, high power bandwidth MOSFET

This hybrid circuit utilizes thick film (cermet) resistors, ceramic

Q10A

http://www.cirrus.com

Q13

High Voltage Power Operational Amplifiers

Q10B

PA85, PA85A

P r o d u c t I n n o v a t i o n F r o m

+IN

D23

COMP

Q11

Q16

Q17

Q12

Q18

OUT

–V

TYPICAL APPLICATION

as a beam traverses the face of a CRT. This is necessary in

high resolution flat face monitors since the distance between

cathode and screen varies as the beam moves from the center

of the screen to the edges. PA85 lends itself well to this function

since it can be connected as a summing amplifier with inputs

from the nominal focus potential and the dynamic correction.

The nominal might be derived from a potentiometer, or per-

haps automatic focusing circuitry might be used to generate

this potential. The dynamic correction is generated from the

sweep voltages by calculating the distance of the beam from

the center of the display.

EXTERNAL CONNECTIONS

Dynamic focusing is the active correction of focusing voltage

X SWEEP

Y SWEEP

SAMPLE

z =

FOCUS

+IN

–IN

+ y

Gain

PHASE COMPENSATION

+Vs

100

–Vs

PATENTED

SUPPLY VOLTAGE

TOP VIEW

RATED FOR FULL

IN1

IN2

COMP

PA85 • PA85A

3.3pF

68pF

10pF

+225V

-225V

PA85

APEX − PA85UREVO

PA85 • PA85A

100Ω

330Ω

OUT

COMP

PACKAGE STYLE CE

0Ω

8-PIN TO-3

MAY 2009

FOCUS

GRID

Related parts for PA85A

PA85A Summary of contents

Page 1

... FOCUS X SWEEP SAMPLE SWEEP SAMPLE EXTERNAL CONNECTIONS COMP Q12 Q11 1 OUT Q17 Q18 Q16 – Copyright © Cirrus Logic, Inc. 2009 (All Rights Reserved) PA85 • PA85A PA85 • PA85A PATENTED 8-PIN TO-3 PACKAGE STYLE IN1 F +225V IN2 PA85 -225V + OUT +IN 4 TOP VIEW ...

Page 2

... RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case NOTES: * The specification of PA85A is identical to the specification for PA85 in applicable column to the left. 1. Unless otherwise noted supply voltage is typical rating. 2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. Ratings apply only to output transistors. An additional 10W may be dissipated due to quiescent power. 3. Doubles for every 10° ...

Page 3

... FREQUENCY, F (Hz) POWER SUPPLY REJECTION 140 120 100 100 1K 10K FREQUENCY, F (Hz) PA85 • PA85A QUIESCENT CURRENT 1.20 1.15 1.10 1.05 1.00 .95 .90 40M 0 100 200 TOTAL SUPPLY VOLTAGE, V POWER RESPONSE 500 250 125 100 2KΩ ...

Page 4

... PA85 • PA85A GENERAL Please read Application Note 1 "General Operating Consider- ations" which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.Cirrus.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit and heat sink selection. The " ...

Page 5

... Cirrus Logic, Cirrus, and the Cirrus Logic logo designs, Apex Precision Power, Apex and the Apex Precision Power logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks or service marks of their respective owners. PA85U PA85 • PA85A 5 ...

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