MAX4411EVKIT Maxim Integrated Products, MAX4411EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX4411EVKIT
• Description: Power Management Modules & Development Tools MAX4411 EVAL KIT MAX4411 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX4411EVKIT

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

• One pair of 16Ω or 32Ω headphones
• One variable DC power supply capable of supplying
• One stereo audio source
The MAX4411 EV kit is fully assembled and tested.
Follow the steps below to verify board operation. Do not
turn on the power supply until all connections are com-
pleted:
1) Verify that shunts are installed across pins 1 and 2 of
1) Plug the headphones into the 3.5mm headphone
3) Ensure that the stereo audio source is turned off.
4) Connect the disabled audio source between IN_ and
5) Connect the 1.8V to 3.6V DC power supply to the
6) Turn on the DC power supply.
7) Enable the stereo audio source.
The MAX4411 is a fixed-gain, stereo headphone ampli-
fier featuring Maxim’s DirectDrive architecture. The
device consists of two 80mW Class AB headphone
amplifiers, an internal feedback network, undervoltage
lockout (UVLO)/shutdown control, a charge pump, and
comprehensive click-and-pop suppression circuitry.
The MAX4411 EV kit has an internal gain of -1.5V/V and
can be powered with a 1.8V to 3.6V single supply. The
MAX4411 EV kit can be used to evaluate the
MAX4411B. The MAX4411B has an internal -2V/V gain.
To evaluate the MAX4411B, request a MAX4411BETP
free sample with the MAX4411 EV kit.
MAX4411 Evaluation Kit
2
between 1.8V and 3.6V at 300mA
jumpers JU1 and JU2.
jack.
GND.
VDD and GND pads.
_______________________________________________________________________________________
Recommended Equipment
Detailed Description
Quick Start
Procedure
The MAX4411 EV kit provides two shutdown pins
(SHDNL and SHDNR) to disable the outputs, allowing
each channel to be shut down independently. Jumpers
JU1 and JU2 control the left and right channels,
respectively (see Table 1 for shutdown shunt positions).
Shorting pin 2 of JU1 to pin 2 of JU2 allows the user to
control both channels’ shutdown pins simultaneously by
driving the provided user pad SHDN with an external
source (see Figure 1 for shunt configuration). SHDNL
and SHDNR are CMOS logic-level inputs.
To optimize the audio performance of the MAX4411, it
is important to follow these layout guidelines. The
MAX4411 EV kit uses two ground planes to minimize
switching noise from the charge-pump coupling into the
audio signal. The two planes are star-connected at one
point (GND pad). Capacitors C1, C2, and C3 should be
placed close to the IC. Short, wide traces should be
used to connect the power pins of the IC to the power
supply.
Note: Capacitors C1 and C2 can be reduced in size.
See Figure 3 and the MAX4411 data sheet for details.
Figure 1. Simultaneous Shutdown Control
Table 1. Shutdown Selection
JUMPER
JU1
JU2
POSITION
SHUNT
1–2
2–3
1–2
2–3
1
2
3
JU1 JU2
Layout Considerations
1
2
3
Left channel enabled
Left channel disabled
Right channel enabled
Right channel disabled
Shutdown Control
DESCRIPTION