MAX9723DETE+ Maxim Integrated Products, MAX9723DETE+ Datasheet

IC AMP AUDIO .06W STER AB 16TQFN

MAX9723DETE+

Manufacturer Part Number
MAX9723DETE+
Description
IC AMP AUDIO .06W STER AB 16TQFN
Manufacturer
Maxim Integrated Products
Series
DirectDrive™r
Type
Class ABr
Datasheet
1.MAX9723DETE.pdf (25 pages)

Specifications of MAX9723DETE+

Output Type
Headphones, 2-Channel (Stereo)
Max Output Power X Channels @ Load
60mW x 2 @ 16 Ohm
Voltage - Supply
1.8 V ~ 3.6 V
Features
Bass Boost, Depop, I²C, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control
Mounting Type
Surface Mount
Package / Case
16-TQFN Exposed Pad
Amplifier Class
AB
No. Of Channels
2
Output Power
60mW
Supply Voltage Range
1.8V To 3.6V
Load Impedance
16ohm
Operating Temperature Range
-40°C To +85°C
Amplifier Case Style
TQFN
Rohs Compliant
Yes
For Use With
MAX9723DEVKIT+ - EVALUATION KIT FOR MAX9723
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
19-3509; Rev 2; 8/08
The MAX9723 stereo DirectDrive
with BassMax and volume control is ideal for portable
audio applications where space is at a premium and per-
formance is essential. The MAX9723 operates from a sin-
gle 1.8V to 3.6V power supply and includes features that
reduce external component count, system cost, board
space, and improves audio reproduction.
The headphone amplifier uses Maxim’s DirectDrive
architecture that produces a ground-referenced output
from a single supply, eliminating the need for large DC-
blocking capacitors. The headphone amplifiers deliver
62mW into a 16Ω load, feature low 0.006% THD+N, and
high 90dB PSRR. The MAX9723 features Maxim’s indus-
try-leading click-and-pop suppression.
The BassMax feature boosts the bass response of the
amplifier, improving audio reproduction when using
inexpensive headphones. The integrated volume con-
trol features 32 discrete volume levels, eliminating the
need for an external potentiometer. BassMax and the
volume control are enabled through the I
compatible interface. Shutdown is controlled through
either the hardware or software interfaces.
The MAX9723 consumes only 3.7mA of supply current
at 1.8V, provides short-circuit and thermal-overload
protection, and is fully specified over the extended
-40°C to +85°C temperature range. The MAX9723 is
available in a tiny (2mm x 2mm x 0.62mm) 16-bump
chip-scale package (UCSP™) or 16-pin thin QFN (4mm
x 4mm x 0.8mm) package.
PDA Audio
Portable CD Players
Mini Disc Players
Automotive Multimedia
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
SMBus is a trademark of Intel Corp.
UCSP is a trademark of Maxim Integrated Products, Inc.
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.
MAX9723A
MAX9723B
MAX9723C
MAX9723D
PART
SLAVE ADDRESS
________________________________________________________________ Maxim Integrated Products
Stereo DirectDrive Headphone Amplifier
1001100
1001101
1001100
1001101
with BassMax, Volume Control, and I
General Description
MP3-Enabled Cellular
Phones
MP3 Players
Selector Guide
®
MAXIMUM GAIN (dB)
headphone amplifier
Applications
2
+6
+6
C/SMBus™-
0
0
♦ 62mW, DirectDrive Headphone Amplifier
♦ 1.8V to 3.6V Single-Supply Operation
♦ Integrated 32-Level Volume Control
♦ High 90dB PSRR at 1kHz
♦ Low 0.006% THD+N
♦ Industry-Leading Click-and-Pop Suppression
♦ ±8kV HBM ESD-Protected Headphone Outputs
♦ Short-Circuit and Thermal-Overload Protection
♦ Low-Power Shutdown Mode (5µA)
♦ Software-Enabled Bass Boost (BassMax)
♦ I
♦ Available in Space-Saving, Thermally Efficient
**Replace the ‘_’ with the one-letter code that denotes the
slave address and maximum programmable gain. See the
Selector Guide.
+Denotes a lead-free/RoHS-compliant package.
*Future product—contact factory for availability.
Pin Configurations appear at end of data sheet.
MAX9723_EBE-T*
MAX9723_ETE+
Eliminates Bulky DC-Blocking Capacitors
Packages:
2
C/SMBus-Compatible Interface
16-Bump UCSP (2mm x 2mm x 0.62mm)
16-Pin Thin QFN (4mm x 4mm x 0.8mm)
PART**
SCL
SDA
INL
INR
MAX9723
I
2
C INTERFACE
CONTROL
VOLUME
1.8V TO 3.6V SUPPLY
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
Σ
Σ
OUTL
OUTR
BBL
BBR
Block Diagram
PIN-
PACKAGE
16 UCSP-16
16 TQFN
BassMax
BassMax
Features
PKG
CODE
B16-1
T1644-4
2
C
1

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MAX9723DETE+ Summary of contents

Page 1

... DirectDrive is a registered trademark of Maxim Integrated Products, Inc. SMBus is a trademark of Intel Corp. UCSP is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products 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. ♦ 62mW, DirectDrive Headphone Amplifier ...

Page 2

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I ABSOLUTE MAXIMUM RATINGS SGND to PGND .....................................................-0.3V to +0. PGND............................................................-0. .........................................................-0.3V to +0. C1P to PGND..............................................-0. C1N to ...

Page 3

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I ELECTRICAL CHARACTERISTICS (continued) = SHDN = 3V, PGND = SGND = 0V 1µF, BB_ = 0V. gain = 0dB, maximum volume, BassMax disabled. Load connect- (V ...

Page 4

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I TIMING CHARACTERISTICS = SHDN = 3V, PGND = SGND = 0V 1µF, BB_ = 0V, gain = 0dB, maximum volume, BassMax disabled. Load connect ...

Page 5

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I = SHDN = 3V, PGND = SGND = 0V 1µF, BB_ = 0V, gain = 0dB, maximum volume, BassMax disabled. Load con nected between ...

Page 6

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I = SHDN = 3V, PGND = SGND = 0V 1µF, BB_ = 0V, gain = 0dB, maximum volume, BassMax disabled. Load con nected between ...

Page 7

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I = SHDN = 3V, PGND = SGND = 0V 1µF, BB_ = 0V, gain = 0dB, maximum volume, BassMax disabled. Load con nected between ...

Page 8

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I = SHDN = 3V, PGND = SGND = 0V 1µF, BB_ = 0V, gain = 0dB, maximum volume, BassMax disabled. Load con nected between ...

Page 9

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I PIN BUMP NAME THIN QFN UCSP C1P 3 B1 PGND 4 A1 C1N 5 B2 SCL SDA SHDN ...

Page 10

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and GND CONVENTIONAL AMPLIFIER BIASING SCHEME +V DD SGND -V DD DirectDrive BIASING SCHEME Figure 1. Traditional Amplifier Output vs. MAX9723 DirectDrive Output the headphone. The ...

Page 11

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I Click-and-Pop Suppression The output-coupling capacitor is a major contributor of audible clicks and pops in conventional single-supply headphone amplifiers. The amplifier charges the cou- pling capacitor to its output bias ...

Page 12

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I SDA t SU, DAT t LOW SCL t HIGH t HD, STA t R START CONDITION Figure 3. 2-Wire Serial-Interface Timing Diagram from the master. The master, typically a microcontroller, ...

Page 13

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and SCL SDA Figure 4. START, STOP, and REPEATED START Conditions Table 1. MAX9723 Address Map MAX9723 SLAVE ADDRESS PART MAX9723A ...

Page 14

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I COMMAND BYTE IS STORED RECEIPT OF STOP CONDITION ACKNOWLEDGE FROM MAX9723 S SLAVE ADDRESS 0 ACK COMMAND BYTE ACKNOWLEDGE R/W FROM MAX9723 Figure ...

Page 15

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I Table 7. MAX9723A and MAX9723B Gain Settings ( Max Gain = 0dB ...

Page 16

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I Table 9. MAX9723C and MAX9723D Gain Settings ( Max Gain = +6dB ...

Page 17

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I MAX9723A AND MAX9723B TRANSFER FUNCTION ( -10 -20 -30 -40 - CODE Figure 7. MAX9723A/MAX9723B Transfer Function with MAX9723C ...

Page 18

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I GAIN PROFILE WITH AND WITHOUT BassMax POLE 6 f WITH ZERO 4 BassMax 2 0 MAX9723A -2 WITHOUT CMD REGISTER -4 BassMax CODE = 0xFF R1 = ...

Page 19

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I R MAX9723 R AUDIO INPUT BassMax ENABLE Figure 12. Using BassMax to Increase MAX9723’s Maximum Gain Table 12. BassMax Gain Examples (R1 = 47kΩ) R2 (kΩ ...

Page 20

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I 1.8V TO 3.6V ANALOG INPUT 10kΩ 10kΩ 1μF SCL SDA INR INTERFACE SHDN MAX9723 V DD C1P C1 CHARGE PUMP C1N 1μF ...

Page 21

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I 1. 3.6V 10kΩ 10kΩ SDA MASTER SCL C IN 0.47μF INL C IN CODEC 0.47μF INR C1P C1 1μF C1N 1μF TOP VIEW (BUMP ...

Page 22

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 22 ______________________________________________________________________________________ 2 C Package Information ...

Page 23

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information (continued ...

Page 24

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 24 ______________________________________________________________________________________ 2 C Package Information (continued) ...

Page 25

... 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 ____________________ 25 © 2008 Maxim Integrated Products ...

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