MAX97200_12 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Low-Power, Low-Offset, Dual Mode, Class H DirectDrive Headphone Amplifier

19-4981; Rev 3; 8/12
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Low-Power, Low-Offset, Dual Mode, Class H
DirectDrive Headphone Amplifier
General Description
The MAX97200 is a 45mW Class H headphone amplifier
that runs from a single low 1.8V supply voltage and employs
Maxim’s second-generation DirectDrive technology.
The MAX97200 features a Dual ModeK internal charge
pump to generate the power rails for the amplifier. The
charge-pump output can be QPVIN/2 or QPVIN depend-
ing on the amplitude of the output signal. When the out-
put voltage is low, the power-supply voltage is QPVIN/2.
When the output signal demands larger output voltage,
the charge pump switches modes so that a greater
power-supply voltage is realized and more output power
can be delivered to the load.
Second-generation DirectDrive technology improves
power consumption when compared to first-generation
DirectDrive amplifiers. The MAX97200 can be powered
from a regulated 1.8V and have similar power consump-
tion to a traditional DirectDrive amplifier that is powered
from 0.9V.
Maxim’s DirectDrive architecture uses an inverting
charge pump to derive a negative voltage supply. The
headphone amplifier is powered between the positive
supply and the generated negative rail. This scheme
allows the audio output signal to be biased about
ground, eliminating the need for large DC-blocking
capacitors between the amplifier output and the head-
phone load.
Low-output offset voltage provides very good click-and-
pop performance both into and out of shutdown. High
signal-to-noise ratio maintains system fidelity.
The MAX97200 is available in a tiny, 12-bump wafer
level packaging (WLP 1.27mm x 1.65mm) with a small,
0.4mm lead pitch and specified over the -40NC to +85NC
extended temperature range.
Cellular Phones
Smartphones
MP3 Players
VoIP Phones
Applications
Features
S Second-Generation DirectDrive Technology
S Dynamic, Class H, Dual Mode Charge Pump
S Low Voltage Operation, VPVIN = 1.8V
S Low Quiescent Current, 1.15mA (typ) at VPVIN =
1.8V
S Eliminates Large Output DC-Blocking Capacitors
S Industry-Leading Click-and-Pop Performance
S High-Fidelity, SNR 105dB (5.6µV Output Noise)
S Output Power 34mW into 32I (THD+N 1%)
S Output Power 45mW into 16I (THD+N 10%)
S Tiny, 12-Bump, 1.27mm x 1.65mm (0.4mm Lead
Pitch) WLP Package
Ordering Information/
Selector Guide
PART
MAX97200AEWC+
MAX97200BEWC+
GAIN
(dB)
3
0
PIN-
PACKAGE
12 WLP
12 WLP
TOP
MARK
ABF
ABG
Note: All devices operate over the -40°C to +85°C tempera-
ture range.
+Denotes a lead(Pb)-free and RoHS-compliant package.
Typical Operating Circuit
LEFT AUDIO
INPUT
MAX97200
APPLICATIONS
PROCESSOR
SHDN
RIGHT AUDIO
INPUT
LEFT AUDIO OUTPUT
RIGHT AUDIO
OUTPUT
CHARGE
PUMP
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
Dual Mode is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
  1
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.