Rainbow Electronics MAX9820 - Manual

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
♦ Clickless/Popless Operation
♦ High RF Noise Rejection
♦ Windows Vista Premium Mobile Compliant
♦ 2.7V to 5.5V Single-Supply Operation
♦ 95mW Output Power (32Ω, V
DD = 5V)
♦ Low-Current Shutdown Mode, < 1µA
♦ Low 3mA (V
DD = 3.3V) Quiescent Current
♦ Space-Saving, 3mm x 3mm, 10-Pin TDFN Package
MAX9820
DirectDrive Headphone Amplifier
with External Gain
________________________________________________________________ Maxim Integrated Products 1
19-4666; Rev 0; 7/09
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.
EVALUATION KIT
AVAILABLE
1
3
4
10
8
7
GND
V
DD
INL
C1P
V
SS
OUTL
MAX9820
2 9 C1N
5 6 INR OUTR
*EP
*EXPOSED PAD.
TDFN
TOP VIEW
SHDN
Pin Configuration
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.
LEFT
AUDIO
INPUT
RIGHT
AUDIO
INPUT
SHDN
MAX9820
DirectDrive OUTPUTS
ELIMINATE DC-BLOCKING
CAPACITORS
Simplified Block Diagram
Windows Vista is a registered trademark of Microsoft Corp.
DirectDrive is a registered trademark of Maxim Integrated Products, Inc.