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EK34

Description
Amplification module and development tool eval kit pa240cx
CategoryDevelopment board/suite/development tools   
File Size317KB,3 Pages
ManufacturerCirrus Logic
Websitehttp://www.cirrus.com
Download Datasheet Parametric View All

EK34 Overview

Amplification module and development tool eval kit pa240cx

EK34 Parametric

Parameter NameAttribute value
MakerCirrus Logic
Product CategoryAmplification modules and development tools
RoHSno
Description/FunctionAudio Amplifiers
EncapsulationBulk
productAmplifier Modules
P r o d u
I
I
n n o v a
t i o
n
nnova
EK34
c t
PA240CX
F
F
r
r
o
o
m
m
EK34
EK34
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 1µF 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
Irtn1
+VS
pump or differential, usually
+Vs
shorted for non-inverting
C4
C3
R7,19 Current sense for Howland cur-
GND
rent pump. Could also be used to
isolate large Cloads (ref. AN25)
C10
C9
R8,21 Positive feedback, install to H
-Vs
-VS
for a Howland current pump,
OUT1
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
VIN
IC CIRCUIT
(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.
Irtn2
Evaluation Kit for PA240CX
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 #
Eval 34
Clamp04
MS11
TW14
HS29
Description
Evaluation Board PA40/140CX
Clamp for HS29
Pin Receptacle, 30 pin strip
Thermal Washer TO220 10/Pack
Heat Sink, 2.7 DEG/W
I
V
R4
Quantity
1
2
1
1
1
EQUIVALENT SCHEMATIC
R2
-IN1
R1
C1
C2
R5
1
+IN1
R6
+VS
3
R3
+VS
Cc
7
R7
D1
D2
H
D
Rs
-VS
5
2
PA240(1)
6
4
-VS
Rc
R10
R8
C5
R9
Cs
J3
-VS
R12
I
V
R14
-IN2
R11
C7
C6
R15
1
R17
+VS
3
R13
+VS
Cc
7
R16
+VS
Rc
R18
R19
-VS
Cs
-VS
R21
H
D
-VS
D3
OUT2
D4
+IN2
5
2
PA240(2)
6
4
-VS
C8
R20
Rs
EK34U
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 2009
1
APEX − EK34UREVF

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