MAX9820 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – DirectDrive Headphone Amplifier with External Gain

19-4666; Rev 0; 7/09
EVAALVUAAILTAIOBNLEKIT
DirectDrive Headphone Amplifier
with External Gain
General Description
The MAX9820 Windows Vista^®-compliant stereo head-
phone amplifier is designed for portable equipment
where board space is at a premium. It features Maxim’s
patented DirectDrive^® architecture to produce a
ground-referenced output from a single supply, elimi-
nating the large output-coupling capacitors required by
conventional single-supply headphone amplifiers.
The MAX9820 features an undervoltage lockout that
prevents over discharging of the battery during
brownout conditions, click-and-pop suppression that
eliminates audible transients on startup, a low-power
shutdown mode, and thermal-overload and short-circuit
protection. Additionally, the MAX9820 suppresses RF
radiation received by input and supply traces acting as
antennas and prevents the amplifier from demodulating
the coupled noise.
The MAX9820 is available in a 10-pin TDFN package
(3mm x 3mm x 0.8mm) and specified over the -40°C to
+85°C extended temperature range.
Applications
Cell Phones
MP3 Players
Notebook PCs
PDAs
Features
o Clickless/Popless Operation
o High RF Noise Rejection
o Windows Vista Premium Mobile Compliant
o 2.7V to 5.5V Single-Supply Operation
o 95mW Output Power (32Ω, V_DD = 5V)
o Low-Current Shutdown Mode, < 1µA
o Low 3mA (V_DD = 3.3V) Quiescent Current
o Space-Saving, 3mm x 3mm, 10-Pin TDFN Package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP MARK
MAX9820ETB+ -40°C to +85°C 10 TDFN-EP*
AUU
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configuration
Simplified Block Diagram
TOP VIEW
C1P 1
C1N 2
V_SS 3
OUTL 4
OUTR 5
MAX9820
*EP
*EXPOSED PAD.
TDFN
10 GND
9 SHDN
8 VDD
7 INL
6 INR
LEFT
AUDIO
INPUT
SHDN
RIGHT
AUDIO
INPUT
MAX9820
DirectDrive OUTPUTS
ELIMINATE DC-BLOCKING
CAPACITORS
Windows Vista is a registered trademark of Microsoft Corp.
DirectDrive is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.