Datenblatt für MAX4338 Eval Kit von Analog Devices Inc./Maxim Integrated

lVI/JXI/VI [MAXI/VI
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
General Description
The MAX4338 evaluation kit (EV kit) is a fully assembled
and tested surface-mount circuit board that evaluates
the MAX4338 audio amplifier. The MAX4338 EV kit is
designed to be driven by the lineout of a CD player or
directly connected to any stereo audio source. The
MAX4338 EV kit includes RCA jacks on the input and a
3.5mm headphone jack on the output to facilitate easy
connections to the circuit board.
This MAX4338 EV kit can also be used to evaluate the
MAX4233 high-output-drive, Rail-to-Rail®op amp.
Features
♦Capable of Driving a Stereo 32ΩLoad
(POUT = 60mW, VCC = 5V, THD + N = 1%,
RL= 32Ω, fIN = 1kHz)
(POUT = 20mW, VCC = 3V, THD + N = 1%,
RL= 32Ω, fIN = 1kHz)
♦Single-Supply Operation
♦Low 0.1% THD + N (20Hz to 20kHz)
(VCC = 5V, POUT = 40mW, RL= 32Ω)
(VCC = 3V, POUT = 17mW, RL= 32Ω)
♦Low-Profile Design (2.0mm, max)
♦Fully Assembled and Tested Surface-Mount
Board
♦On-Board Shutdowns
Evaluates: MAX4338/MAX4233
MAX4338 Evaluation Kit
________________________________________________________________ Maxim Integrated Products 1
19-2276; Rev 0; 1/02
Component List
Ordering Information
DESIGNATION QTY DESCRIPTION
C1, C3 2
100pF ±10%, 10V ceramic
capacitors (0402)
TDK C1005C0G1H101K
C2, C4 2 Thr oug h- hol e capacitors
( not i nstal l ed )
C5, C6 2
0.47µF ±10%, 20V tantalum
capacitors (R-case)
AVX TAJR474M020R
C7 1
1µF ±10%, 10V X5R ceramic
capacitor (0603)
TDK C1608X5R1A104K
C8 1
0.1µF ±10%, 10V X5R ceramic
capacitor (0402)
TDK C1005X5R1A104K
C9, C10, C11 3
220µF ±10%, 10V tantalum
capacitors (Y-case)
AVX TPSY227M010R0200 or
Sprague 592D227X0010V2T
PART TEMP RANGE IC PACKAGE
MAX4338EVKIT 0°C to +70°C10 µMAX
DESIGNATION QTY DESCRIPTION
J1 1 Phono jack (side-entry PC board
mount) red
J2 1 Phono jack (side-entry PC board
mount) white
J3 1 Stereo headphone jack
(3.5mm dia.)
JU1–JU5 5 2-pin headers
R1, R2 2 22.1kΩ ±1% resistors (0603)
R3, R4, 6 100kΩ ±5% resistors (0603)
R5, R6 2 47.5kΩ ±1% resistors (0603)
R7, R8 2 Through-hole resistors
(not installed)
U1 1 MAX4338EUB (10-pin µMAX)
None 5 Shunts
None 1 MAX4338 EV kit PC board
None 1 MAX4335–MAX4338 data sheet
Note: To evaluate the MAX4233, request a MAX4233AUB free
sample with the MAX4338EVKIT.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
[MAXI/VI
Evaluates: MAX4338/MAX4233
MAX4338 Evaluation Kit
2 _______________________________________________________________________________________
Quick Start
Required Equipment:
•One pair of 32Ωheadphones
•One variable DC power supply capable of supply-
ing between 2.7V and 5V at 200mA
•One stereo audio source
The MAX4338 EV kit is fully assembled and tested.
Follow the steps below to verify board operation. Do
not turn on the power supply until all connections
are completed:
1) Plug the headphones into the 3.5mm headphone
jack.
2) Ensure that the audio source is turned off.
3) Connect the disabled audio source through the
RCA phono jacks.
4) Ensure that the shunts JU1–JU5 are not installed.
5) Connect the 2.7V to 5V DC power supply to the
VCC and GND pads.
6) Turn on the 2.7V to 5V DC power supply.
7) Turn on the audio source.
Detailed Description
The MAX4338 EV kit is a stereo, single-supply audio
amplifier. The MAX4338 EV kit is designed to be driven
by the stereo lineout of a CD player or directly connect-
ed to any stereo audio source. The input impedance is
22.1kΩ. The -3dB corner frequencies are approximately
30Hz and 34kHz with a 32Ωload. The MAX4338 EV kit
has a gain of approximately 2.1. An input signal of
700mVRMS, while using a 5V supply, produces a full-
range output with a 32Ωload. An input signal of
400mVRMS, while using a 3V supply, produces a full-
range output with a 32Ωload.
Shutdown Control
The MAX4338 EV kit provides two SHDN pins to disable
the left and right outputs independently. Jumpers JU1
and JU2 control the left and right channels. Jumper
JU3 connects both the left channel and right channel
SHDN pins together so that both channels can be shut
down simultaneously. Table 1 lists the options available
for shutdown control. An external controller can be
used by removing the shunts on JU1, JU2, JU3 and
connecting the external controller to the pads labeled
SHDN1 and SHDN2. SHDN1 and SHDN2 are
TTL/CMOS logic-level inputs.
Note: Please indicate that you are using the MAX4338 when contacting these component suppliers.
SUPPLIER PHONE FAX WEBSITE
AVX 843-946-0238 843-626-3123 www.avxcorp.com
Sprague 402-563-6866 402-563-6296 www.vishay.com
TDK 847-803-6100 847-390-4405 www.component.tdk.com
Component Suppliers
[VI/JXIIVI
Evaluates: MAX4338/MAX4233
MAX4338 Evaluation Kit
_______________________________________________________________________________________ 3
Shutdown Current Measurements
The MAX4338 EV kit has active-low shutdowns and
uses pullup resistors (R9 and R10) to activate these
shutdowns. Any shutdown current measurements
should take into account the current being drawn
through R9 and R10, as well as the current drawn
through the bias resistors R3 and R4. This current can
be calculated using the following equations (assumes
both shutdowns are active):
The maximum shutdown current of the MAX4338 is
0.5µA.
Output Capacitor Jumper Selection
Jumpers JU4 and JU5 removes the output DC-blocking
capacitors (C9 and C10) from the circuit. This allows
the user to drive a pure resistive load if desired.
Inserting JU4 or JU5 produces an output on the corre-
sponding channel with a DC component equal to
midrail (VCC/2) and changes the -3dB highpass corner
frequency of 30Hz (see Table 2 for shunt positions).
Through-Hole Components
The MAX4338 EV kit also provides pads for the user to
solder up to two through-hole components per channel
onto the PC board (R7, C2 and R8, C4). This allows the
user access to test the op amps capacitive- and resis-
tive-load driving capabilities, without having to access
the output of the op amp through the headphone jack.
III
IV
R
V
R
V
RR
SUPPLY RES MAX
RES CC CC CC
=+
=++
+
4338
91034
JUMPER
JU1 JU2 JU3 DESCRIPTION
Not
Installed
Not
Installed Don’t Care Left and r i g ht
channel s enab l ed
Installed Not
Installed
Not
Installed
Right channel
disabled
Not
Installed Installed Not
Installed
Left channel
disabled
Installed Installed Don’t Care
Installed Not
Installed
Not
Installed Installed
Installed
Left and right
channels
disabled
Table 1. Shutdown Selection Table 2. DC-Blocking Capacitor Jumpers
JUMPER SHUNT
POSITION FUNCTION
Installed C9 removed from circuit
JU4 Not Installed C9 remains in circuit
Installed C10 removed from circuit
JU5 Not Installed C10 remains in circuit
[VIIJXIIVI
Evaluates: MAX4338/MAX4233
MAX4338 Evaluation Kit
4 _______________________________________________________________________________________
R4
100kΩ
R5
47.5kΩ
1%
R1
22.1kΩ
1%
R3
100kΩ
VCC
J3
TP1
TP3
2
3
1
4
5
2
1
10
VCC
VCC
C8
0.1mF C9
220µF
10V
C5
0.47µF
20V
C1
100pF
C7
1µF
C11
220µF
10V
VCC
GND
R7
OPEN
R11
100kΩ
3
2
1
C2
OPEN
SHDN1
J1
JU4
U1-A
MAX4338
TP2
R6
47.5kΩ
1%
R2
22.1kΩ
1%
8
7
1
6
2
9
C10
220µF
10V
C6
0.47µF
20V
C3
100pF
R8
OPEN
R12
100kΩ
C4
OPEN
J2
JU5
U1-B
MAX4338
VCC
R10
100kΩ
SHDN2
JU2
JU3
VCC
R9
100kΩ
SHDN1
JU1
SHDN1
INPUT1
INPUT2
OUTPUT
NOTE: INPUT1/SHDN1 REFERS TO THE RIGHT CHANNEL.
INPUT2/SHDN2 REFERS TO THE LEFT CHANNEL.
RING OF HEADPHONE JACK (J3) IS RIGHT.
TIP OF HEADPHONE JACK (J3) IS LEFT.
Figure 1. MAX4338 EV Kit Schematic
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MAX4338 Evaluation Kit
Evaluates: MAX4338/MAX4233
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5
© 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Figure 2. MAX4338 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX4338 EV Kit PC Board Layout—Component Side
Figure 4. MAX4338 EV Kit PC Board Layout—Solder Side
1.0" 1.0"
1.0"