MAX9724CETC+T Maxim Integrated Products, MAX9724CETC+T Datasheet

IC AMP AUDIO .063W STER 12TQFN

MAX9724CETC+T

Manufacturer Part Number
MAX9724CETC+T
Description
IC AMP AUDIO .063W STER 12TQFN
Manufacturer
Maxim Integrated Products
Series
DirectDrive™r
Type
Class ABr
Datasheet

Specifications of MAX9724CETC+T

Output Type
Headphones, 2-Channel (Stereo)
Max Output Power X Channels @ Load
63mW x 2 @ 32 Ohm
Voltage - Supply
2.5 V ~ 5.5 V
Features
Depop, Short-Circuit and Thermal Protection, Shutdown
Mounting Type
Surface Mount
Package / Case
12-TQFN Exposed Pad
For Use With
MAX9724AEVKIT+ - EVALUATION KIT FOR MAX9724A/BMAX9724DEVKIT+ - KIT EVAL FOR MAX9724D
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX9724C/MAX9724D stereo headphone ampli-
fiers are designed for portable equipment where board
space is at a premium. These devices use a unique,
DirectDrive
enced output from a single supply, eliminating the need
for large DC-blocking capacitors, saving cost, board
space, and component height. The MAX9724 sup-
presses RF radiation received by input and supply
traces acting as antennas and prevents the amplifier
from demodulating the coupled noise. The MAX9724C
offers an externally adjustable gain while the
MAX9724D has an internally preset gain of -1.5V/V. The
MAX9724C/MAX9724D deliver up to 60mW per channel
into a 32Ω load and have low 0.02% THD+N. An 80dB
at 1kHz power-supply rejection ratio (PSRR) allows
these devices to operate from noisy digital supplies
without an additional linear regulator. Comprehensive
click-and-pop circuitry suppresses audible clicks and
pops on startup and shutdown.
The MAX9724C/MAX9724D operate from a single 2.5V
to 5.5V supply, consume only 3.5mA of supply current,
feature short-circuit and thermal-overload protection,
and are specified over the extended -40°C to +85°C
temperature range. The devices are available in tiny
12-bump UCSP™ (1.5mm x 2mm) and 12-pin thin QFN
(3mm x 3mm x 0.8mm) packages.
19-4130; Rev 0; 5/08
Pin Configurations appear at end of data sheet.
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.
phone Amplifier with 1.8V Compatible Shutdown
Cellular Phones
MP3 Players
Notebook PCs
Handheld Gaming Consoles
Low RF Susceptibility DirectDrive Stereo Head-
®
AUDIO
AUDIO
RIGHT
INPUT
INPUT
architecture to produce a ground-refer-
LEFT
________________________________________________________________ Maxim Integrated Products
SHDN
General Description
MAX9724C
Applications
DVD Players
Smart Phones
PDAs
ELIMINATE DC-BLOCKING
DirectDrive OUTPUTS
CAPACITORS
♦ Improved RF Noise Rejection (Up to 67dB Over
♦ No Bulky DC-Blocking Capacitors Required
♦ Low-Power Shutdown Mode, < 0.1µA
♦ Adjustable Gain (MAX9724C) or Fixed -1.5V/V
♦ Low 0.02% THD+N
♦ High PSRR (80dB at 1kHz) Eliminates LDO
♦ Integrated Click-and-Pop Suppression
♦ 2.5V to 5.5V Single-Supply Operation
♦ Low Quiescent Current (3.5mA)
♦ Available in Space-Saving Packages
UCSP is a trademark of Maxim Integrated Products, Inc.
Note: All devices specified over the -40°C to +85°C operating
range.
+ Denotes a lead-free package.
T = Tape and reel.
* EP = Exposed pad.
DirectDrive is a registered trademark of
Maxim Integrated Products, Inc.
MAX9724CEBC+T
MAX9724CETC+
MAX9724DEBC+T
MAX9724DETC+
AUDIO
AUDIO
INPUT
RIGHT
INPUT
SHDN
LEFT
Typical Amplifiers)
Gain (MAX9724D)
12-Bump UCSP (1.5mm x 2mm)
12-Pin Thin QFN (3mm x 3mm x 0.8mm)
PART
MAX9724D
GAIN (V/V)
Ordering Information
Adj.
Adj.
-1.5
-1.5
Block Diagrams
FIXED GAIN ELIMINATES
ELIMINATE DC-BLOCKING
EXTERNAL RESISTOR
PIN-PACKAGE
12 UCSP
12 TQFN-EP*
12 UCSP
12 TQFN-EP*
DirectDrive OUTPUTS
CAPACITORS
NETWORK
Features
MARK
+AGE
+AEH
+ABK
+ABJ
TOP
1

Related parts for MAX9724CETC+T

MAX9724CETC+T Summary of contents

Page 1

... Applications + Denotes a lead-free package Tape and reel. DVD Players * EP = Exposed pad. Smart Phones PDAs DirectDrive is a registered trademark of Maxim Integrated Products, Inc. UCSP is a trademark of Maxim Integrated Products, Inc. DirectDrive OUTPUTS ELIMINATE DC-BLOCKING LEFT CAPACITORS AUDIO INPUT SHDN RIGHT AUDIO ...

Page 2

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD PVSS to SVSS ........................................................-0.3V to +0.3V PGND to SGND .....................................................-0.3V to +0.3V C1P to PGND..............................................-0. C1N ...

Page 3

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown ELECTRICAL CHARACTERISTICS (continued) = 5V, PGND = SGND, SHDN = 5V 1µ 20kΩ 30kΩ); for MAX9724D gain ...

Page 4

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown = 5V, PGND = SGND = 0V, SHDN = THD+N measurement bandwidth = 22Hz to 22kHz, both outputs driven in phase, T TOTAL HARMONIC DISTORTION ...

Page 5

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown = 5V, PGND = SGND = 0V, SHDN = THD+N measurement bandwidth = 22Hz to 22kHz, both outputs driven in phase, T TOTAL HARMONIC DISTORTION ...

Page 6

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown = 5V, PGND = SGND = 0V, SHDN = THD+N measurement bandwidth = 22Hz to 22kHz, both outputs driven in phase, T OUTPUT POWER vs. ...

Page 7

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown = 5V, PGND = SGND = 0V, SHDN = THD+N measurement bandwidth = 22Hz to 22kHz, both outputs driven in phase, T CROSSTALK vs. FREQUENCY ...

Page 8

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown = 5V, PGND = SGND = 0V, SHDN = THD+N measurement bandwidth = 22Hz to 22kHz, both outputs driven in phase, T EXITING SHUTDOWN V ...

Page 9

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown Detailed Description The MAX9724C/MAX9724D stereo headphone ampli- fiers feature Maxim’s DirectDrive architecture, eliminat- ing the large output-coupling capacitors required by conventional single-supply headphone amplifiers. The device consists of ...

Page 10

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown the MAX9724 addresses the problem of the RF suscep- tibility by rejecting RF noise and preventing it from cou- pling into the audio band. The RF susceptibility of ...

Page 11

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown °C/W as specified in the Absolute Maximum Ratings section. For example, θ of the thin QFN package is JA +68°C/W, and 154.2°C/W for the UCSP package. The MAX9724C/MAX9724D ...

Page 12

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown pump’s load regulation and output resistance value that is too small degrades the device’s ability to provide sufficient current drive, which leads to a loss of ...

Page 13

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown Lineout Amplifier and Filter Block The MAX9724C can be used as an audio line driver capable of providing 2V into 10kΩ loads with a sin- RMS gle 5V ...

Page 14

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown To suppress this noise, and to provide a 2V dard audio output level from a single 5V supply, the MAX9724C can be configured as a line driver and ...

Page 15

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown μCONTROLLER STEREO DAC ______________________________________________________________________________________ V DD 0.1μF 15kΩ 1μF 15kΩ INR OUTR PVDD OUTR- BIAS 1μF MAX9710 GND PGND MUTE OUTL- 0.1μF SHDN 15kΩ OUTL+ INL ...

Page 16

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown 2.7V TO 5.5V C3 1μF 12 (B1 (C1) C1P CHARGE C1 PUMP 1μF 3 C1N (C3) PVSS SVSS PGND 4 9 (C4) (B4) C2 1μF ...

Page 17

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown Functional Diagram/Typical Operating Circuits (continued) 2.7V TO 5.5V C3 1μF 12 (B1 (C1) C1P CHARGE C1 PUMP 1μF 3 (C3) C1N SVSS PGND PVSS 4 ...

Page 18

Low RF Susceptibility DirectDrive Stereo Head- phone Amplifier with 1.8V Compatible Shutdown TOP VIEW OUTR 10 MAX9724C 11 OUTL MAX9724D TQFN 18 ______________________________________________________________________________________ TOP VIEW (BUMPS ON BOTTOM ...

Page 19

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © 2008 Maxim Integrated Products ...

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