EK61 Cirrus Logic Inc, EK61 Datasheet

KIT EVALUATION PA78/PA79

EK61

Manufacturer Part Number
EK61
Description
KIT EVALUATION PA78/PA79
Manufacturer
Cirrus Logic Inc
Series
Apex Precision Power™r
Datasheets

Specifications of EK61

Channels Per Ic
1 - Single, 2 - Dual
Amplifier Type
Power
Output Type
Single-Ended
Board Type
Bare (Unpopulated)
Utilized Ic / Part
PA78DK, PA79DK
Product
Amplifier Modules
Description/function
Audio Amplifiers
For Use With/related Products
PA78DK, PA79DK
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Operating Temperature
-
Current - Output / Channel
-
Voltage - Supply, Single/dual (±)
-
-3db Bandwidth
-
Slew Rate
-
Current - Supply (main Ic)
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
Other names
598-1398
EK61
FEATURES
♦ A Unique (Patent Pending) Technique for Very
♦ Over 350 V/µs Slew Rate
♦ Wide Supply Voltage
♦ Output Current – 150mA Cont.; 200mA Pk
♦ Up to 23 Watt Dissipation Capability
♦ Over 200 kHz Power Bandwidth
APPLICATIONS
♦ Piezoelectric Positioning and Actuation
♦ Electrostatic Deflection
♦ Deformable Mirror Actuators
♦ Chemical and Biological Stimulators
PA78U
Low Quiescent Current
♦ Single Supply: 20V To 350V
♦ Split Supplies: ± 10V To ± 175V
http://www.cirrus.com
PACKAGE STYLE DK
P r o d u c t I n n o v a t i o n F r o m
P r o d u c t I n n o v a t i o n F r o m
20–Pin PSOP
Power Operational Amplifier
V+
V–
CLASS AB INPUT STAGE
ACTIVE LOAD
ACTIVE LOAD
BLOCK DIAGRAM
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
VOUT+
VOUT–
DESCRIPTION
The PA78 is a high voltage, high speed, low idle cur-
rent op-amp capable of delivering up to 200mA peak
output current. Due to the dynamic biasing of the input
stage, it can achieve slew rates over 350V/µs, while
only consuming less than 1mA of idle current. External
phase compensation allows great flexibility for the user
to optimize bandwidth and stability.
The output stage is protected with user selected cur-
rent limit resistor. For the selection of this current limit-
ing resistor, pay close attention to the SOA curves for
each package type. Proper heatsinking is required for
maximum reliability.
CURRENT
BUFFER
LIMIT
PACKAGE STYLE EU
LEAD FORM EW
VOUT
12–Pin SIP
APEX − PA78UREVB
PA78
JUL 2009
PA78
1

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EK61 Summary of contents

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PA78 ChARACTERISTICS AND SPECIFICATIONS ABSOLUTE MAxIMUM RATINGS Parameter SUPPLY VOLTAGE − OUTPUT CURRENT, peak (200ms), within SOA POWER DISSIPATION, internal, DC POWER DISSIPATION, internal, DC INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder, 10s ...

Page 3

Parameter POWER SUPPLY VOLTAGE CURRENT, quiescent (Note 5) ±150V Supply ThERMAL RESISTANCE, DC, junction to case (PA78EU) RESISTANCE, DC, ...

Page 4

PA78 TYPICAL APPLICATION CIRCUIT The PA78 is ideally suited for driving continuous drop ink jet printers, in both piezo actuation and deflection applica- tions. The high voltage of the amplifier creates an electro- static field on the deflection plates to ...

Page 5

SMALL SIGNAL OPEN LOOP GAIN 100 R = OPEN 0pF 3.3K, C ...

Page 6

PA78 SR+/SR- (25% - 75%) 1000 SR- 800 600 400 200 PEAK-TO-PEAK INPUT VOLTAGE SR+/SR- (25% -75%) 1000 SR+ 800 600 400 200 PEAK-TO-PEAK INPUT VOLTAGE SR+/SR- (25% ...

Page 7

PULSE RESPONSE vs. CAP LOAD 140 120 100 - ...

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PA78 GENERAL Please read Application note 1 “General operating considerations” which covers stability, power sup- plies, heat sinking, mounting, current limit, SOA inter- pretation, and specification interpretation. Visit www. cirrus.com for design tools that help automate tasks such as calculations ...

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standby. An increase in the idle current in the output stage of the amplifier will improve phase margin for ...

Page 10

PA78 LAYOUT CONSIDERATIONS The PA78 is built on a dielectrically isolated process and the package tab is therefore not electrically connected to the amplifier. For high speed operation, the package tab should be connected to a stable reference to reduce ...

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