EK34 Cirrus Logic Inc, EK34 Datasheet
EK34
Manufacturer Part Number
EK34
Description
EVALUATION KIT FOR PA240CX
Manufacturer
Cirrus Logic Inc
Series
Apex Precision Power™r
Specifications of EK34
Channels Per Ic
1 - Single
Amplifier Type
Power
Output Type
Single-Ended
Board Type
Bare (Unpopulated)
Utilized Ic / Part
PA240CX
Product
Amplifier Modules
Description/function
Audio Amplifiers
For Use With/related Products
PA240CX
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
598-1391
INTRODUCTION
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.
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
EQUIVALENT SCHEMATIC
EK34U
-IN1
+IN1
-IN2
+IN2
Fast, easy breadboarding of circuits using the PA240CX are
A multitude of circuit configurations are possible, so only sev-
http://www.cirrus.com
C6
C2
Description
Evaluation Board PA40/140CX
Clamp for HS29
Pin Receptacle, 30 pin strip
Thermal Washer TO220 10/Pack
Heat Sink, 2.7 DEG/W
R15
R17
R11
R5
R6
R1
EK34 PA240CX
R9
R20
C5
C8
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
1
1
2
2
+VS
-VS
+VS
-VS
PA240(1)
PA240(2)
3
4
3
4
7
6
7
C1
C7
6
Evaluation Kit for PA240CX
5
5
-VS
-VS
R12
R2
Rs
Cs
Rs
Cs
R13
R3
Cc
Rc
Cc
Rc
-VS
V
V
I
I
R19
+VS
R18
R4
R10
R14
R16
R7
R21
R8
Copyright © Cirrus Logic, Inc. 2009
Quantity
H
D
H
D
+VS
+VS
(All Rights Reserved)
1
2
1
1
1
D1
-VS
D3
-VS
J3
D2
D4
TYPICAL COMPONENT FUNCTIONS
COMPONENT
C1,7
C2,6
C3,4
C5,8
Cc
Cs
D1-4
R1,11
R2,12
R3,13
R4,14
R5,15
C10
+VS
-VS
IC CIRCUIT
C4
C9
Alone is a roll off, with R3, 13 is a current out stability
network (ref. AN19)
With R6, 15 forms noise gain compensation network
(ref. AN25)
Supply bypass, .22 to 1µF ceramic
With R9, 20 forms a Howland stability network, can
jumper both to ground +IN
Sets compensation to match desired gain
Normally not used.
Flyback protection diodes
Inverting inputs, install to input line or to ground
Negative feedback, install to V for voltage out or to I
for current output (ref. AN19)
With C1, 7 forms a stability network for current output
(ref. AN19)
Current sense for current outputs (ref. AN13)
With C2, 6 forms noise gain compensation network
C3
+Vs
GND
-Vs
OUT2
OUT1
Irtn1
VIN
Irtn2
FUNCTION
(ref. AN25)
R6,17
R7,19
R8,21
R9,20
R10
R18,19 Can provide mid-supply refer-
Rc
Rs
Input R for Howland current
pump or differential, usually
shorted for non-inverting
Current sense for Howland cur-
rent pump. Could also be used to
isolate large Cloads (ref. AN25)
Positive feedback, install to H
for a Howland current pump,
to D for a differential circuit
With C5, 8 forms a Howland
stability net work, can jumper
both to ground +IN
With an equal value R12 pro-
vides gain = -1 for a bridge slave
(ref. AN3,20)
ence for single supply bridge
(ref. AN3, 20)
Normally shorted.
Normally not used.
APEX − EK34UREVF
EK34
MAY 2009
EK34
1
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EK34 Summary of contents
Page 1
... 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 ...
Page 2
... EK34 FIGURE 1. EVALUATION BOARD #6 SELF TAPPING SCREW (TYP) PA240(1) MICROTECHNOLOGY EVAL34 GND TOP EVAL34 REV C COMPONENT SIDE +IN1 Irtn1 EVAL34 BOTTOM HS29 CLAMP04 R10 J3 -IN1 OUT1 -Vs VIN GND OUT2 MS11 PA240(2) Rc C10 Cc GND +IN2 -IN2 Irtn2 +Vs TW14 EK34U ...
Page 3
... 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. EK34U EK34 3 ...