MAX97220AEVKIT+ Maxim Integrated Products, MAX97220AEVKIT+ Datasheet - Page 2

• Manufacturer Part Number: MAX97220AEVKIT+
• Description: Audio Modules & Development Tools MAX97220 Evaluation Kit
• Manufacturer: Maxim Integrated Products

Specifications of MAX97220AEVKIT+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MAX97220A Evaluation Kit
• MAX97220A EV kit
• 2.5V to 5.5V DC supply
• Stereo audio signal source
• Pair of stereo headphones
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)
2)
3)
4)
5)
6)
7)
8)
2_ _ _______________________________________________________________________________________
Verify that a shunt is installed across jumper JU1
(device enabled).
Set the power-supply output to 5V.
Disable the power-supply output.
Connect the power-supply ground to the GND pad
and the power-supply positive output to the VDD
pad on the EV kit.
Connect headphones to the stereo headphone jack
(HP_OUT) provided on the EV kit.
Verify that the audio source output is disabled.
Connect the left output of the audio source to the
INL- pad.
Connect the ground of the audio source to the INL+
pad.
Recommended Equipment
Quick Start
Procedure
9)
10) Connect the ground of the audio source to the INR+
11) Enable the stereo audio source.
12) Enable the power-supply output.
13) Verify that the headphones are playing the audio
The MAX97220A EV kit features the MAX97220A differen-
tial stereo headphone driver with DirectDrive, designed
to directly drive a 125mW into a 32I stereo headphone.
The EV kit operates from a DC power supply that can
provide 2.5V to 5.5V and accepts two sets of differential
audio inputs.
Jumper JU1 enables or disables the headphone ampli-
fier. See Table 1 for jumper JU1 configuration.
When replacing the MAX97220A with either the
MAX97220C or MAX97220D, several external compo-
nents must be changed. R1–R4 should be replaced with
0ω resistors. R5–R8 should be removed from the PCB.
C11–C16 should be left uninstalled (same as the default
EV kit setting).
Table_1._Shutdown_Input_(JU1)
*Default position.
SHUNT_POSITION
Not installed
Connect the right output of the audio source to the
INR- pad.
pad.
source signal.
Installed*
MAX97220C/MAX97220D Usage
Headphone Amplifier Shutdown
Connected to GND
Connected to VDD
Detailed Description
through R9
SHDN_PIN
AMPLIFIER
Disabled
Enabled