MAX9725EEVKIT+ Maxim Integrated Products, MAX9725EEVKIT+ Datasheet

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MAX9725EEVKIT+

Manufacturer Part Number
MAX9725EEVKIT+
Description
Audio Modules & Development Tools MAX9725E KIT MAX9725E KIT
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX9725EEVKIT+

Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX9725E evaluation kit (EV kit) is a fully assem-
bled and tested printed-circuit board (PCB) that uses
the MAX9725E IC to drive a stereo headphone in
portable applications. The MAX9725E is a low-power
stereo headphone amplifier with adjustable gain and
DirectDrive™ outputs. Maxim’s DirectDrive technology
eliminates the need for bulky DC-blocking capacitors at
the output of the amplifier.
The EV kit is configured for a -1.82V/V gain and is
designed to operate from a 0.9V to 1.8V DC power sup-
ply. The EV kit is capable of delivering up to 20mW per
channel into a 32Ω load and achieves 0.006% THD+N.
The MAX9725E EV kit can also be used to evaluate the
MAX9725A, MAX9725B, MAX9725C, or MAX9725D
fixed-gain amplifiers. Contact Maxim for free samples of
the MAX9725A, MAX9725B, MAX9725C, or MAX9725D.
See the Part Selection Table for IC ordering information.
The MAX9725_ IC temperature range is -40°C to +85°C.
19-4038; Rev 0; 2/08
Note: Indicate that you are using the MAX9725E when contacting this component supplier.
UCSP is a trademark of Maxim Integrated Products, Inc.
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.
Murata Mfg. Co., Ltd.
C1, C2, C3, C5,
DESIGNATION
FB1, FB2, FB3
OUT
JU1
MAX9725AEBC+
MAX9725BEBC+
MAX9725CEBC+
MAX9725DEBC+
MAX9725EEBC+
C6
C4
PART
SUPPLIER
QTY
________________________________________________________________ Maxim Integrated Products
5
1
3
1
1
Part Selection Table
1µF ±10%, 10V X5R ceramic
capacitors (0603)
Murata GRM188R61A105K
4.7µF ±10%, 6.3V X5R ceramic
capacitor (0603)
Murata GRM188R60J475K
120Ω at 100MHz, 25mΩ DCR, 3A
ferrite beads (0603)
Murata BLM18SG121TN1
2-pin header
Stereo headphone jack (3.5mm)
General Description
DESCRIPTION
Adjustable
GAIN
-1.5
-2
-1
-4
770-436-1300
MAX9725E Evaluation Kit
PHONE
♦ No DC-Blocking Output Capacitors Required
♦ 0.9V to 1.8V Operation
♦ Adjustable -1.82V/V Gain
♦ 20mW per Channel into a 32Ω
♦ Low 0.006% THD+N
♦ Fully Assembled and Tested
+ Denotes lead-free and RoHS-compliant.
DESIGNATION
OUTL, OUTR,
R1, R2, R5
R3, R4
SGND
MAX9725EEVKIT+
U1
PART
QTY
www.murata.com
0
3
2
1
1
1
Ordering Information
Not installed, test points
10kΩ ±1% resistors (0603)
18.2kΩ ±1% resistors (0603)
Fixed-gain, stereo headphone
amplifier (12-bump UCSP™,
1.54mm x 2.02mm x 0.6mm)
Maxim MAX9725EEBC+
Shunt (JU1)
PCB: MAX9725E Evaluation Kit+
Component Supplier
Component List
WEBSITE
Ω
DESCRIPTION
Load
TYPE
EV Kit
Features
1

Related parts for MAX9725EEVKIT+

MAX9725EEVKIT+ Summary of contents

Page 1

... MAX9725E Evaluation Kit ♦ No DC-Blocking Output Capacitors Required ♦ 0.9V to 1.8V Operation ♦ Adjustable -1.82V/V Gain ♦ 20mW per Channel into a 32Ω ♦ Low 0.006% THD+N ♦ Fully Assembled and Tested GAIN MAX9725EEVKIT+ -2 -1.5 + Denotes lead-free and RoHS-compliant Adjustable DESIGNATION ...

Page 2

MAX9725E Evaluation Kit Required Equipment Before beginning, the following equipment is needed: • 0.9V to 1.8V, 500mA power supply • 32Ω stereo headphones with a 3.5mm plug • Audio signal source (e.g., MP3 player, CD player, etc.) The MAX9725E EV ...

Page 3

Evaluating the MAX9725A–MAX9725D The MAX9725E EV kit can also evaluate the fixed-gain MAX9725A, MAX9725B, MAX9725C, or MAX9725D ICs after performing the following: 1) Replace U1 with the alternate MAX9725 IC. 2) Replace resistors R1 and R2 with 0Ω 0603 surface- ...

Page 4

MAX9725E Evaluation Kit Figure 2. MAX9725E EV Kit Component Placement Guide— Component Side 4 _______________________________________________________________________________________ Figure 3. MAX9725E EV Kit PCB Layout—Component Side ...

Page 5

... 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 © 2008 Maxim Integrated Products MAX9725E Evaluation Kit is a registered trademark of Maxim Integrated Products, Inc ...

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