PA61 Cirrus Logic Inc, PA61 Datasheet

PA61

Manufacturer Part Number

PA61

Description

OP AMP 90V 10A TO-3-8 CE

Manufacturer

Cirrus Logic Inc

Series

Apex Precision Power™r

Datasheets

1.PA61A.pdf (5 pages)

2.PA61A.pdf (3 pages)

Specifications of PA61

Amplifier Type

Power

Number Of Circuits

Slew Rate

2.8 V/µs

Gain Bandwidth Product

1MHz

Current - Input Bias

12nA

Voltage - Input Offset

2000µV

Current - Supply

3mA

Current - Output / Channel

10A

Voltage - Supply, Single/dual (±)

20 V ~ 90 V, ±10 V ~ 45 V

Operating Temperature

-25°C ~ 85°C

Mounting Type

Through Hole

Package / Case

TO-3-8

Number Of Channels

Voltage Gain Db

108 dB

Common Mode Rejection Ratio (min)

74 dB

Input Offset Voltage

6 mV

Maximum Operating Temperature

+ 85 C

Mounting Style

Through Hole

Maximum Dual Supply Voltage

+/- 45 V

Minimum Operating Temperature

- 25 C

Lead Free Status / RoHS Status

Request inventory verification / Request inventory verification

Output Type

-3db Bandwidth

Lead Free Status / Rohs Status

Details

Other names

598-1317

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FEATURES

• WIDE SUPPLY RANGE — ±10 to ±45V

• HIGH OUTPUT CURRENT — ±10A Peak

• LOW COST — Class “C” output stage

• LOW QUIESCENT CURRENT — 3mA

APPLICATIONS

• PROGRAMMABLE POWER SUPPLY

• MOTOR/SYNCRO DRIVER

• VALVE AND ACTUATOR CONTROL

• DC OR AC POWER REGULATOR

• FIXED FREQUENCY POWER OSCILLATOR

DESCRIPTION

amplifiers designed to drive resistive, inductive and capaci-

tive loads. Their complementary emitter follower output stage

is the simple class C type and optimized for low frequency

applications where crossover distortion is not critical. These

amplifiers are not recommended for audio, transducer or

deflection coil drive circuits above 1kHz or when distortion is

critical. The safe operating area (SOA) is fully specified and

can be observed for all operating conditions by selection of

user programmable current limiting resistors. Both amplifiers

are internally compensated for all gain settings. For continu-

ous operation under load, mounting on a heatsink of proper

rating is recommended.

capacitors, and semiconductor chips to maximize reliabil-

ity, minimize size, and give top performance. Ultrasonically

bonded aluminum wires provide reliable interconnections at

all operating temperatures. The 8-pin TO-3 package is electri-

cally isolated and hermetically sealed. The use of compres-

sible thermal washers and/or improper mounting torque

voids the product warranty. Please see “General Operating

Considerations” .

EQUIVALENT SCHEMATIC

PA61U

The PA61 and PA61A are high output current operational

This hybrid circuit utilizes thick film conductors, ceramic

http://www.cirrus.com

PA61, PA61A

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

Power Operational Amplifiers

Q1A

Q6A

Q1B

Q6B

TYPICAL APPLICATION

often utilize remote sensing to compensate IR drops in the

wiring. The importance of remote sensing increases as ac-

curacy requirements, output currents, and distance between

amplifier and load go up. The circuit above shows wire resis-

tance from the PA61 to the load and back to the local ground

via the power return line. Without remote sensing, a 7.5A load

current across only 0.05 ohm in each line would produce a

0.75V error at the load.

and two low current sense wires, IR drops in the power return

line become common mode voltages for which the op amp

has a very high rejection ratio. Voltage drops in the output and

power return wires are inside the feedback loop. Therefore, as

long as the Power Op Amp has the voltage drive capability to

overcome the IR losses, accuracy remains the same. Applica-

tion Note 7 presents a general discussion of PPS circuits.

EXTERNAL CONNECTIONS

FIGURE 1. PROGRAMMABLE POWER SUPPLY

WITH REMOTE SENSING

Due to its high current drive capability, PA61 applications

With the addition of the second ratio matched R

+IN

–IN

–V

±10V

DAC

TOP VIEW

L+

N.C.

IN2

IN1

+42V

–42V

OUT

L–

PA61 • PA61A

PA61

CL+

CL–

APEX − PA61UREVL

CL+

CL–

PA61 • PA61A

RTN

PACKAGE STYLE CE

SENSE LO

SENSE HI

OUT

OUTPUT

LOAD

8-PIN TO-3

MAY 2009

pair

Related parts for PA61

PA61 Summary of contents

Page 1

... The circuit above shows wire resis- tance from the PA61 to the load and back to the local ground via the power return line. Without remote sensing, a 7.5A load current across only 0.05 ohm in each line would produce a ...

Page 2

... RESISTANCE, junction to air TEMPERATURE RANGE, case NOTES: * The specification of PA61A is identical to the specification for PA61 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. ...

Page 3

... FREQUENCY, F (Hz) COMMON MODE REJECTION 120 100 100 1K 10K .1M 1M FREQUENCY, F (Hz) QUIESCENT CURRENT 1.6 1.4 1.2 1 TOTAL SUPPLY VOLTAGE, V (V) S PA61 • PA61A CURRENT LIMIT – 100 125 CASE TEMPERATURE, T (°C) C POWER RESPONSE ±40V 8Ω 3Ω 10K 20K ...

Page 4

... PA61 • PA61A 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. PA61U PA61 • PA61A 5 ...

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