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Электронный компонент: EK34

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APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
1
INTRODUCTION
Fast, easy breadboarding of circuits using the PA240CX are
possible with the EK34 PC board. Mounting holes are provided
and the provision for standard banana jacks simplifies connec-
tion and testing. The amplifier may be mounted horizontally or
vertically. Components are labeled on both sides of the board
for ease in probing.
A multitude of circuit configurations are possible, so only sev-
eral component locations have specific functions and will usually
be necessary. This kit is not suitable for use with PA240CC.
PARTS LIST
Part #
Description
Quantity
Eval 34
Evaluation Board PA40/140CX
1
Clamp04
Clamp for HS29
2
MS11
Pin Receptacle, 30 pin strip
1
TW14
Thermal Washer TO220 10/Pack
1
HS29
Heat Sink, 2.7 DEG/W
1
EQUIVALENT SCHEMATIC
TYPICAL COMPONENT FUNCTIONS
COMPONENT
FUNCTION
C1,7
Alone is a roll off, with R3, 13 is a current out stability
network (ref. AN19)
C2,6
With R6, 15 forms noise gain compensation network
(ref. AN25)
C3,4
Supply bypass, .22 to 1F ceramic
C5,8
With R9, 20 forms a Howland stability network, can
jumper both to ground +IN
Cc
Sets compensation to match desired gain
Cs
Normally not used.
D1-4
Flyback protection diodes
R1,11 Inverting inputs, install to input line or to ground
R2,12 Negative feedback, install to V for voltage out or to I
for current output (ref. AN19)
R3,13 With C1, 7 forms a stability network for current output
(ref. AN19)
R4,14 Current sense for current outputs (ref. AN13)
R5,15 With C2, 6 forms noise gain compensation network
(ref. AN25)
R6,17 Input R for Howland current
pump or differential, usually
shorted for non-inverting
R7,19 Current sense for Howland
current pump. Could also be
used to isolate large Cloads
(ref. AN25)
R8,21 Positive feedback, install to H
for a Howland current pump, to
D for a differential circuit
R9,20 With C5, 8 forms a Howland
stability net work, can jumper
both to ground +IN
R10
With an equal value R12 pro-
vides gain = -1 for a bridge slave
(ref. AN3,20)
R18,19 Can provide mid-supply refer-
ence for single supply bridge
(ref. AN3, 20)
Rc
Normally shorted.
Rs
Normally not used.
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 USA APPLICATIONS HOTLINE: 1 (800) 546-2739
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EK34
EVALUATION KIT
FOR PA240CX PIN-OUT
This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice.
EK34U REV E JUNE 2005 2005 Apex Microtechnology Corp.
FIGURE 1.
EVAL34
TOP
EVAL34
BOTTOM