General Description
The MAX9890 evaluation kit (EV kit) provides a proven
design to evaluate the MAX9890 stereo click-pop
suppressor.
The MAX9890 EV kit printed-circuit board (PCB) comes
with a MAX9890AETA+ installed (200ms switch turn-on
time). To evaluate the 330ms switch turn-on time version,
request a free sample of the MAX9890BETA+.
Features
♦2.7V to 5.5V Single-Supply Operation
♦3.5mm Stereo Input and Output Jacks
♦Lead-Free and RoHS-Compliant
♦Proven PCB Layout
♦Fully Assembled and Tested
Evaluates: MAX9890
MAX9890 Evaluation Kit
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Maxim Integrated Products
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19-4095; Rev 0; 4/08
Component List
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
Component Suppliers
DESIGNATION QTY DESCRIPTION
C1 1
1µF ±20%, 6.3V X5R ceramic
capacitor (0603)
TDK C1608X5R0J105M
C2 1
0.1µF ±20%, 16V ceramic
capacitor (0603)
Murata GRM188R71C104K
C3, C4 2
100µF, 6.3V tantalum capacitors
(T case)
Nichicon F950J107MTAAQ2
C5, C6 0 Not installed, capacitors
(T case)
DESIGNATION QTY DESCRIPTION
J1, J2 2 Surface-mount, 1/8in stereo
headset jacks
JU1 1 3-pin header
U1 1
Audio click-pop suppressor
(8 TDFN-EP*)
Maxim MAX9890AETA+
(Top Mark: AHA)
— 1 Shunt
— 1 PCB: MAX9890 Evaluation Kit+
SUPPLIER PHONE WEBSITE
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
Nichicon USA 858-824-1515 www.nichicon-us.com
TDK Corp. 847-803-6100 www.component.tdk.com
PART TYPE
MAX9890EVKIT+ EV Kit
+
Denotes lead-free and RoHS-compliant.
*
EP = Exposed pad.
Note: Indicate that you are using the MAX9890 when contacting these component suppliers.
Evaluates: MAX9890
MAX9890 Evaluation Kit
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Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
• MAX9890 EV kit
• 5V DC power supply
• Stereo audio source
• Single-ended stereo headphone amplifier
• Stereo headphones
Procedure
The MAX9890 is fully assembled and tested. Follow the
steps below to verify board operation:
1) Verify that jumper JU1 is in its default position, as
shown in Table 1.
2) Connect headphones to J2.
3) Connect headphone amplifier output to J1.
4) Connect audio source to single-ended stereo head-
phone amplifier.
5) Connect power supply between VCC and GND.
6) Enable audio source.
7) Enable headphone amplifier.
8) Verify that audio is passed to headphones without
any audible clicks or pops.
Detailed Description of Hardware
The MAX9890 EV kit provides a proven layout for the
MAX9890.
Table 1. MAX9890 EV Kit Jumper
Descriptions
Figure 1. MAX9890 EV Kit Schematic
JUMPER SHUNT
POSITION DESCRIPTION
1-2* SHDN = VCC, normal operation
JU1 2-3 SHDN = GND, shutdown mode
*
Default position.
Evaluates: MAX9890
MAX9890 Evaluation Kit
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Figure 2. MAX9890 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX9890 EV Kit PCB Layout—Component Side
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.
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Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Evaluates: MAX9890
MAX9890 Evaluation Kit
Figure 4. MAX9890 EV Kit PCB Layout—Solder Side
