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MAX97003 Evaluation Kit
Evaluates: MAX97003
Detailed Description of Hardware
The MAX97003 EV kit evaluates the MAX97003 Class
D audio amplifier and stereo DirectDrive Class H head-
phone amplifier, which communicates over I 2 C. The
EV kit demonstrates the device features such as user-
defined input configuration, input gain, input source,
output enable, and volume control. The EV kit uses the
device in a 20-bump (2.4mm x 2mm) wafer-level pack-
age (WLP) on a proven six-layer PCB design. The EV kit
operates from a 2.7V to 5.5V and 1.8V DC power supply.
The EV kit delivers 1W into an 8 I speaker and 32mW/
channel into a 32 I headphone.
Filterless Output
The EV kit’s filterless outputs (OUT+, OUT-) can be
connected directly to a speaker load without any filter-
ing. Use the OUT+ and OUT- test points to connect the
speaker directly to the device outputs using a twisted-
pair cable. Do not install inductors L1 and L2 for maxi-
mum efficiency.
Filtered Output
Audio analyzers typically cannot accept pulse-width
modulated (PWM) signals at their inputs. Therefore, the
EV kit includes a pair of lowpass filters at the output to
ease evaluation. To use the filtering output pads (FOUT+,
FOUT-), install inductors L1 and L2 (provided with the EV
kit), connect the load between FOUT+ and FOUT-, and
connect the filtered output to the audio analyzer. The
lowpass filters at the speaker outputs are optimized for
an 8 I speaker.
Table 1. Default Shunt Positions (Ju1–Ju4)
JUMPER
JU1
JU2
JU3
JU4
SHUNT
POSITION
Closed*
Open
Closed*
Open
Closed*
Open
1-2*
2-3
DESCRIPTION
On-board I 2 C. Connects the on-board SCL signal to the SCL PCB pad.
User-supplied I 2 C. Open the jumper and apply the SCL signal to the SCL PCB pad.
On-board I 2 C. Connects the on-board SDA signal to the SDA PCB pad.
User-supplied I 2 C. Open the jumper and apply the SDA signal to the SDA PCB pad.
On-board VDD supply. Connects an on-board LDO, outputting 1.8V to the VDD PCB pad.
External VDD supply. Externally supply VDD with 1.8V.
On-board I 2 C. Connects the on-board I 2 C pullup resistors to 3.3V.
User-supplied I 2 C. Connect the external I 2 C master’s logic voltage to the VI2C PCB pad.
* Default position.
_________________________________________________________________ Maxim Integrated Products 8
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