19-3233; Rev 1; 8/09
MAX9716 Evaluation Kit
General Description
The MAX9716 evaluation kit (EV kit) is a fully assembled
and tested circuit board that uses the MAX9716, a low-
cost, mono, 1.4W, bridge-tied-load (BTL) audio power
amplifier with adjustable gain. Designed to operate
from a 2.7V to 5.5V DC power supply, the EV kit is
capable of delivering 1.4W into a 4Ω load with less than
1% THD+N.
The EV kit can be used to evaluate the MAX9717A/B/C/D.
To evaluate the MAX9717A with the EV kit, replace the
MAX9716 IC with a MAX9717A. To evaluate the
MAX9717B/C/D with the EV kit, replace the MAX9716 IC
with a MAX9717B/C/D, remove resistors R1 and R2, and
short the R1 pads.
o
Single Power Supply: 2.7V to 5.5V
o
10nA (typ) IC Shutdown Current
o
1.4W into 4Ω at 1% THD+N
o
1.1W into 8Ω
o
Resistor Adjustable Gain (MAX9716/MAX9717A)
o
Surface-Mount Construction
o
Fully Assembled and Tested
Features
Evaluates: MAX9716/MAX9717A/B/C/D
Ordering Information
PART
MAX9716EVKIT
TYPE
EV Kit
Note:
To evaluate the MAX9717A/B/C/D, request a
MAX9717AETA/MAX9717BETA/MAX9717CETA/MAX9717DETA
free sample with the MAX9716 EV kit.
Component List
DESIGNATION QTY
C1
1
DESCRIPTION
10μF ±20%, 6.3V X5R ceramic
capacitor (0805)
TDK C2012X5R0J106M
0.1μF ±10%, 16V X7R ceramic
capacitor (0603)
TDK C1608X7R1C104K
0.47μF ±20%, 10V tantalum
capacitor (0402)
AVX TACK474M010
1μF ±10%, 10V X5R ceramic
capacitor (0603)
TDK C1608X5R1A105K
10μF ±20%, 6.3V tantalum capacitor
(A case)
AVX TAJA106M006
DESIGNATION QTY
JU1
JU2
OUT
R1, R2
U1
U2
U3
—
—
1
1
1
2
1
0
0
2
1
DESCRIPTION
4-pin header
3-pin header
3.5mm SMT stereo headphone jack
10k
±1% resistors (0603)
Audio power amplifier
Maxim MAX9716ETA (8 TDFN)
Not installed, MAX9716EUA
(8 μMAX
®
)
Not installed, MAX9716EBL
(9 UCSP™)
Shunts
PCB: MAX9716/7 EVALUATION KIT
C2
1
C3
1
C4
1
C5
1
µMAX is a registered trademark and UCSP is a trademark of
Maxim Integrated Products, Inc.
Component Suppliers
SUPPLIER
AVX Corporation
TDK Corp.
PHONE
843-946-0238
847-803-6100
WEBSITE
www.avxcorp.com
www.component.tdk.com
Note:
Indicate that you are using the MAX9716/MAX9717 when contacting these component suppliers.
________________________________________________________________
Maxim Integrated Products
1
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.
MAX9716 Evaluation Kit
Evaluates: MAX9716/MAX9717A/B/C/D
Quick Start
The MAX9716 EV kit is fully assembled and tested.
Follow these steps to verify board operation.
Do not
turn on the power supply until all connections are
completed.
Detailed Description
Jumper Selection
Jumper JU1 controls the IN+ pin (MAX9716) or
BTL/SE
pin (MAX9717). See Table 1 for JU1 function.
Jumper JU2 controls the
SHDN
pin of the MAX9716/
MAX9717 IC. See Table 2 for JU2 functions.
Recommended Equipment
• 2.7V to 5.5V, 1A power supply
• Audio source (i.e., CD player, cassette player)
• 4Ω/8Ω speaker
• Headphone with 3.5mm plug (MAX9717 only)
1) Verify that JU2 has a shunt across pins 1 and 2
(SHDN = high).
2) Verify that JU1 has a shunt across pins 1 and 3
(IN+ = BIAS).
3) Connect the speaker across OUT+ and OUT-.
4) Connect the 5.0V power supply to the VCC pad and
the power-supply ground to the GND pad.
5) Connect the audio source to VIN- pad.
6) Turn on the power supply, and then turn on the
audio source.
7) Plug in the headphone for the headphone mode
(MAX9717 only).
Gain Settings (MAX9716/MAX9717A)
R1 and R2 set the gain of the EV kit. The EV kit comes
with R1 and R2 equal to 10kΩ, setting the BTL gain to
2V/V. To change the output-voltage gain, choose R2
between 10kΩ to 50kΩ. The BTL output gain is deter-
mined by the following equation:
A
V
= 2 x (R2/R1)
where A
V
is the desired BTL output-voltage gain.
For the MAX9717A, the gain of single-ended mode is
set by A
V
= R2/R1.
Evaluating MAX9717A/B/C/D
To evaluate the MAX9717A with the MAX9716 EV kit,
replace the MAX9716ETA with a MAX9717AETA.
Change jumper JU1 position according to Table 1.
To evaluate the MAX9717B/C/D with the MAX9716 EV
kit, replace the MAX9716ETA with a MAX9717BETA/
MAX9717CETA/MAX9717DETA, remove input and
feedback resistors R1 and R2, then short the R1 pads.
The MAX9717B/C/D has internally fixed BTL gains of
6dB, 9dB, and 12dB, respectively. Change jumper JU1
position according to Table 1.
Table 1. JU1 Functions
JU1 SHUNT POSITION
Pins 1 and 2
Pins 1 and 3 (default)
Pins 1 and 4
IN+ = BIAS
Not allowed
IN+ PIN (MAX9716)
Not allowed
BTL/SE
PIN (MAX9717)
BTL/SE
= V
CC
, single-ended output mode
Not allowed
BTL/SE
= GND, BTL output mode
Table 2. JU2 Functions
JU2 SHUNT
POSITION
Pins 1 and 2 (default)
Pins 2 and 3
SHDN
PIN
Connected to V
CC
Connected to GND
EV KIT OUTPUT
Enabled
Disabled
2
_______________________________________________________________________________________
MAX9716 Evaluation Kit
Evaluates: MAX9716/MAX9717A/B/C/D
Figure 1. MAX9716 EV Kit Schematic
_______________________________________________________________________________________
3
MAX9716 Evaluation Kit
Evaluates: MAX9716/MAX9717A/B/C/D
Figure 2. MAX9716 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX9716 EV Kit PC Board Layout—Component Side
Figure 4. MAX9716 EV Kit PC Board Layout—Solder Side
4
_______________________________________________________________________________________
MAX9716 Evaluation Kit
Revision History
REVISION REVISION
NUMBER
DATE
0
1
3/04
8/09
Initial release
Updated figures
DESCRIPTION
PAGES
CHANGED
—
3, 4
Evaluates: MAX9716/MAX9717A/B/C/D
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
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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