Datasheet

_________________________________________________________________ Maxim Integrated Products 2
MAX98306 Evaluation Kit
Evaluates: MAX98306
Quick Start
Recommended Equipment
• MAX98306EVkit
• 2.6Vto5.5V,2ADCpowersupply
• Stereoaudioinput
• Two4I speakers
Procedures
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation. Caution: Do not turn on
the power supply until all connections are completed.
1) Verify that shunts are installed as follows:
JU1, JU4: Installed (single-ended input)
JU2: Pins 1-2 (device enabled)
JU3: Pins 1-3 (12dB gain)
2) Set the power-supply output to 5V. Disable the power
supply.
3) Connect the power-supply ground terminal to the
GND PCB pad and the power-supply positive termi-
nal to the VDD PCB pad on the EV kit.
4) With the audio source disabled, connect the left chan-
nel of the audio source to the INL phono jack or the
INL+ test pad.
5) Connect the right channel of the audio source to the
INR phono jack or the INR+ test pad.
6) Connect the audio source ground to the GND test
pad.
7) Connect the first speaker across the OUTL+ and
OUTL- test points.
8) Connect the second speaker across the OUTR+ and
OUTR- test points.
9) Enable the power-supply output.
10) Enable the audio source.
11) Verify that the speakers are playing the audio source
signal.
Detailed Description of Hardware
Filterless Output
The MAX98306 EV kit’s filterless outputs (OUTL+, OUTL-,
OUTR+, and OUTR-) can be connected directly to a
speaker load without any filtering. Use the OUTL+ and
OUTL- test points or the OUTR+ and OUTR- test points
to connect the speaker directly to the MAX98306 output.
Filtered Output
Audio analyzers typically cannot accept the Class D
amplifier’s pulse-width modulated (PWM) signals at their
inputs. Therefore, the EV kit features optional lowpass
filters at the outputs to ease evaluation. As shipped, the
EV kit’s lowpass filter RC components are unpopulated
and the L1–L4 inductors are shorted on the PCB.
To use the filtered output posts (FOUTL+, FOUTL-,
FOUTR+, and FOUTR-), remove the shorts on L1–L4 and
install components L1–L4, C7–C16, and R3–R6 (pro-
vided separately with the EV kit). Use the output posts
to connect the filtered outputs to the audio analyzer.
Additional filter components are provided with the EV kit
for either a 4I or an 8I speaker.
Jumper Selection
Single-Ended/Differential Audio Inputs
The EV kit features jumpers JU1 and JU4 to select
between a differential or single-ended input mode. See
Table 1 for JU1 and JU4 configurations.
Shutdown Function (SHDN)
The EV kit features a 3-pin jumper (JU2) to control the
active-low shutdown input. Drive SHDN high to place the
device in normal operation; drive SHDN low to place the
device in low-power shutdown mode. See Table 2 for
shunt positions.
Selectable Gain (GAIN)
The EV kit features a 5-pin jumper (JU3) to control the
IC’s five programmable gain settings. See Table 3 for
gain-control configuration.
Component Suppliers
Note: Indicate that you are using the MAX98306 when contacting these component suppliers.
SUPPLIER PHONE WEBSITE
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
TDK Corp. 847-803-6100 www.component.tdk.com
TOKO America, Inc. 847-297-0070 www.tokoam.com