MAX98502EVKIT# Maxim Integrated, MAX98502EVKIT# Datasheet - Page 3

• Manufacturer Part Number: MAX98502EVKIT#
• Description: Amplifier IC Development Tools MAX98502 Eval Kit
• Manufacturer: Maxim Integrated
• Type: Differential Amplifiersr
• Series: MAX98502r

Specifications of MAX98502EVKIT#

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX98502
• Operating Supply Voltage: 2.5 V to 5.5 V
• Description/function: Fully assembled and tested circuit board
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• For Use With: MAX98502

Jumper JU4 provides the option to select between a dif-
ferential or single-ended input mode for the EV kit. See
Table 3 for JU4 configuration.
The IC is designed to pass FCC emissions standards
without any filtering when using up to 24in of cable to
connect the speaker. When evaluating the IC without any
filtering, connect the speaker to the output test points
(OUT+/OUT-).
The EV kit also features PCB pads for a lowpass filter that
can be added to ease evaluation. Audio analyzers typi-
cally cannot accept the Class D amplifier’s pulse-width-
modulated (PWM) waveform at their inputs. The lowpass
Table 2. Shutdown Configuration
(JU2, JU3)
*Default position.
Table 3. Input Mode (JU4)
*Default position.
SDBST PIN
1-2* (high)
1-2 (high)
Not installed
2-3 (low)
2-3 (low)
POSITION
Installed*
(JU3)
SHUNT
SDSPK PIN
1-2* (high)
1-2 (high)
2-3 (low)
2-3 (low)
_________________________________________________________________ Maxim Integrated Products 3
(JU2)
Connected to user-
supplied negative
differential output
Connected to
IN- PIN
AGND
Optional Output Filtering
STATUS
BOOST
Off
Off
On
On
unbalanced input
Differential input
INPUT MODE
Single-ended/
Input Mode
SPEAKER
STATUS
Off
Off
Off
On
filter extracts the audio content from the PWM output
signal and allows the device to be connected directly
to an audio analyzer. The PWM output signal can be
lowpass-filtered by simply installing L2 and L3; all other
components are populated. The filtered outputs should
then be monitored at the FOUT+/FOUT- pads. See Table
4 for suggested filtering components for an 8I load.
Contact the factory for suggested filtering components
for a 4I load.
The EV kit can be used to drive a 4I or 8I load. See
tables 5 and 6 below for required components for each
load.
Table 4. Suggested Filtering Components
for 8I Load
Table 5. Components Required for 4I
Speaker Drive
Table 6. Minimum Components Required
for 8I Speaker Drive
DESIGNATION
DESIGNATION
DESIGNATION
L2, L3
Evaluates: MAX98502
C5
C8
C5
C8
QTY
QTY
QTY
2
1
1
1
1
22FH Q20%, 2A inductors
(D75LC)
TOKO B1047AS-220M
22FF, 6.3V ceramic capacitor
(0603)
Not installed, ceramic capacitor
Optional Output Loading
22FF, 6.3V ceramic capacitor
(0805)
0.1FF, 6.3V ceramic capacitor
(0402)
DESCRIPTION
DESCRIPTION
DESCRIPTION