PA02 Просмотр технического описания (PDF) - Apex Microtechnology
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PA02 Datasheet PDF : 5 Pages
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PA02 • PA02A
Product Innova tionFrom
HARMONIC DISTORTION
1
GAIN = 1
.3 LOAD = 10Ω
.1
.03
.01
.003
= 50mW
PO
= .5W
PO
P
=
O
5W
.001
100 300 1K 3K 10K 30K .1M .3M
FREQUENCY, F (Hz)
PULSE RESPONSE
15
VIN = ±1V, tr = 100ns
10
LOAD = 10Ω
5
0
–5
–10
–15
0 12 3 4 5
TIME, t (µS)
PULSE RESPONSE
.3
VIN = ±.2V, tr = 50ns
.2
.1
0
–.1
–.2
–.3
0
.5 1.0 1.5
TIME, t (µS)
LOADING EFFECTS
0
–.3
IO = 150mA
–.6
–.9
–1.2
IO = 400mA
–1.5
100
1K
10K
.1M
FREQUENCY, F (Hz)
GENERAL
Please read Application Note 1 "General Operating Considerations" which cov-
ers 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; heat
sink selection; Apex Precision Power’s complete Application Notes library; Technical
Seminar Workbook; and Evaluation Kits.
SAFE OPERATING AREA
The SOA curves combine the 5.0
effect of all limits for this Power 4.0
Op Amp. For a given application, 3.0
the direction and magnitude of 2.0
the output current should be cal-
culated or measured and checked
1.5
against the SOA curves. This is 1.0
simple for resistive loads but more
complex for reactive and EMF
0.7
generating loads. The following 0.5
guidelines may save extensive
analytical efforts:
0.3
SOA
T
T
T
C
=TC10=C07=°C02°5C°C
C = 125°C
THERMAL
1. Under transient conditions,
capacitive and dynamic* loads
up to the following maximums
are safe:
0.2
23
5 7 10 15 20 25 30 40
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE VS –VO (V)
CAPACITIVE LOAD
INDUCTIVE LOAD
±VS
ILIM = 2A
ILIM = 5A
ILIM = 2A
ILIM = 5A
18V
2mF
0.7mF
.2H
10mH
15V
10mF
2.2mF
.7H
25mH
10V
25mF
10mF
5H
50mH
* If the inductive load is driven near steady state conditions, allowing the output
voltage to drop more than 8V below the supply rail with ILIM = 5A, or 17V below the
supply rail with ILIM = 2A while the amplifier is current limiting, the inductor should
be capacitively coupled or the current limit must be lowered to meet SOA criteria.
2. The amplifier can handle any EMF generating or reactive load and short circuits
to the supply rails or shorts to common if the current limits are set as follows at
TC = 85°C.
SHORT TO ±VS
SHORT TO
±VS
C, L OR EMF LOAD
COMMON
18V
.5A
1.7A
15V
.7A
2.8A
10V
1.6A
4.2A
These simplified limits may be exceeded with further analysis using the operating
conditions for a specific application.
CURRENT LIMIT
Proper operation requires the use of two current limit resistors, connected as shown
in the external connection diagram.The minimum value for RCL is 0.12 ohm, however for
optimum reliability it should be set as high as possible. Refer to the “General Operating
Considerations” section of the handbook for current limit adjust details.
DEVICE MOUNTING
The case (mounting flange) is electrically isolated and should be mounted directly
to a heatsink with thermal compound. Screws with Belville spring washers are recom-
mended to maintain positive clamping pressure on heatsink mounting surfaces. Long
periods of thermal cycling can loosen mounting screws and increase thermal resistance.
Since the case is electrically isolated (floating) with respect to the internal circuits
it is recommended to connect it to common or other convenient AC ground potential.
4
PA02U
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