MAX4364ESA+ Maxim Integrated Products, MAX4364ESA+ Datasheet - Page 12

• Manufacturer Part Number: MAX4364ESA+
• Description: IC AMP AUDIO PWR 1.4W MONO 8SOIC
• Manufacturer: Maxim Integrated Products
• Type: Class ABr

Specifications of MAX4364ESA+

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 1.4W x 1 @ 8 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: Depop, Short-Circuit and Thermal Protection, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Package: 8SOIC N
• Function: Speaker
• Amplifier Type: Class-AB
• Total Harmonic Distortion Noise: 0.04@8Ohm@1000mW %
• Typical Psrr: 75 dB
• Output Signal Type: Differential
• Maximum Load Resistance: 8 Ohm
• Product: General Purpose Audio Amplifiers
• Output Power: 1.4 W
• Thd Plus Noise: 0.04 %
• Supply Current: 7 mA
• Maximum Power Dissipation: 471 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Audio Load Resistance: 8 Ohms
• Minimum Operating Temperature: - 40 C
• Amplifier Class: AB
• No. Of Channels: 1
• Supply Voltage Range: 2.7V To 5.5V
• Load Impedance: 8ohm
• Operating Temperature Range: -40°C To +85°C
• Amplifier Case Style: SOIC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1.4W and 1W, Ultra-Small, Audio Power
Amplifiers with Shutdown
Proper selection of AC-coupling capacitors (C
C
The value of C
midrail bias voltage rises on startup and falls when enter-
ing shutdown. The size of the input capacitor also affects
clickless/popless operation. On startup, C
to its quiescent DC voltage through the feedback resistor
(R
sient at the amplifier’s output, which can result in an
audible pop. Minimizing the size of C
effect, optimizing click-and-pop suppression.
Proper supply bypassing ensures low-noise, low-distor-
tion performance. Place a 0.1µF ceramic capacitor in
parallel with a 10µF ceramic capacitor from V
GND. Locate the bypass capacitors as close to the
device as possible.
The addition of a digital potentiometer provides simple
volume control. Figure 3 shows the MAX4364/MAX4365
with the MAX5407 log taper digital potentiometer used
as an input attenuator. Connect the high terminal of the
MAX5407 to the audio input, the low terminal to ground
and the wiper to C
12
BIAS
F
) from the output. This current creates a voltage tran-
______________________________________________________________________________________
TOP VIEW
achieves clickless/popless shutdown and startup.
SHDN
BIAS
BIAS
GND
BIAS
IN+
IN+
IN-
IN-
IN
1
2
4
1
2
4
3
3
. Setting the wiper to the top posi-
determines the rate at which the
MAX/TDFN
MAX4364
MAX4365
Pin Configurations
Clickless/Popless Operation
Adding Volume Control
SO
6
6
8
7
5
8
7
5
Supply Bypassing
OUT-
V
OUT-
SHDN
V
OUT+
GND
OUT+
CC
CC
IN
IN
reduces this
is charged
IN
CC
) and
to
tion passes the audio signal unattenuated. Setting the
wiper to the lowest position fully attenuates the input.
Good layout improves performance by decreasing the
amount of stray capacitance and noise at the amplifier’s
inputs and outputs. Decrease stray capacitance by min-
imizing PC board trace lengths, using surface-mount
components and placing external components as close
to the device as possible. Also refer to the Power
Dissipation section for heatsinking considerations.
Figure 3. MAX4364/MAX4365 and MAX5160 Volume Control
Circuit
MAX4364 TRANSISTOR COUNT: 772
MAX4365 TRANSISTOR COUNT: 768
PROCESS: BiCMOS
AUDIO
INPUT
1 H
4 L
MAX5407
W 3
C
IN
R
IN
Layout Considerations
Chip Information
IN-
MAX4364
MAX4365
R
F
OUT+
OUT-