MAX4298 Maxim, MAX4298 Datasheet
MAX4298
Manufacturer Part Number
MAX4298
Description
Ultra-High PSRR Stereo Drivers + Microphone Amp + 100mA Linear Regulator
Manufacturer
Maxim
Datasheet
1.MAX4298.pdf
(14 pages)
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The MAX4298 and MAX4299 are audio system ICs
designed for single +5V applications. The MAX4299
features a stereo headphone driver, a microphone
amplifier, and a +3.3V linear regulator; the MAX4298
features the stereo headphone driver only. The
MAX4298/ MAX4299 are designed specifically for harsh
digital environments where board space is at a premi-
um and the digital power supply is noisy. The design
uses innovative design techniques to achieve ultra-high
power-supply rejection across the audio signal band
while, at the same time, delivering a high-current Rail-
to-Rail
drive highly capacitive loads that may be encountered
when driving long cables to a remote load such as
desktop/notebook headphones or speakers. These
devices are fully compliant with PC99 standards.
The amplifiers exhibit 115dB of DC power-supply rejec-
tion and 80dB at 100kHz. The output amplifiers are
capable of driving a 1.5V
with 0.0008% THD+N. They can also drive 32
phones to 1.2V
linear regulator can output 100mA of current. The
MAX4298 is available in a tiny 10-pin µMAX while the
MAX4299 is available in the space-saving 16-pin
TSSOP package.
19-1743; Rev 1; 2/01
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________Applications
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
®
Notebook and Desktop Audio
Hands-Free Headsets
USB Audio Peripherals
IP Telephones
Wireless Internet Devices
MP3 Players/Recorders
output drive capability. The chip is designed to
Microphone Amp + 100mA Linear Regulator
-100
-110
-120
-130
-140
-150
-50
-60
-70
-80
-90
100
RMS
________________________________________________________________ Maxim Integrated Products
with 0.02% distortion. At +3.3V, the
1k
General Description
FREQUENCY (Hz)
PSRR vs. Frequency
RMS
signal into a 10k
10k
Ultra-High PSRR Stereo Drivers +
100k
head-
load
Typical Operating Circuit appears at end of data sheet.
MAX4298EUB
MAX4298ESD
MAX4299EWP
MAX4299EUE
Pin Configurations continued at end of data sheet.
Audio System IC (MAX4299)
93dB typ PSRR at 20kHz Operates Directly from
Noisy Digital Supplies
Clickless/Popless Power-Up, Power-Down, Mute
and Unmute
PC99-Compliant Output Drivers:
Better than 1V
1.5V
PC99-Compliant Microphone Amplifier:
0.005% THD+N into 10k Load
22nF Capacitive Load Drive Capability
4.5V to 5.5V Single-Supply Operation
Internally Generated Bias Voltage
All Gains Externally Adjustable
Available in Space-Saving Packages
10-Pin µMAX (MAX4298)
16-Pin TSSOP (MAX4299)
Ultra-High PSRR Stereo Headphone Driver
Ultra-High PSRR Microphone Amp
100mA, 3.3V Linear Regulator
PART
RMS
TOP VIEW
and 0.0008% THD+N into 10k Load
OUT1
SV
BIAS
GND
IN1
CC
RMS
1
2
3
4
5
-40ºC to +85 C
-40ºC to +85 C
-40ºC to +85 C
-40ºC to +85 C
TEMP. RANGE
Ordering Information
Output into 16 Load and
MAX4298
Pin Configurations
MAX
10
9
8
7
6
V
OUT2
IN2
C
MUTE
PIN-PACKAGE
10 µMAX
14 SO
20 SO
16 TSSOP
CC
BYPASS
Features
1
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