max9723aebe Maxim Integrated Products, Inc., max9723aebe Datasheet

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max9723aebe

Manufacturer Part Number
max9723aebe
Description
Max9723 Stereo Directdrive Headphone Amplifier With Bassmax, Volume Control, And I?c
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.MAX9723AEBE.pdf (23 pages)
19-3509; Rev 1; 11/05
The MAX9723 stereo DirectDrive™ headphone amplifier
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 patented
DirectDrive architecture that produces a ground-refer-
enced output from a single supply, eliminating the need
for large DC-blocking capacitors. The headphone ampli-
fiers deliver 62mW into a 16Ω load, feature low 0.006%
THD+N, and high 90dB PSRR. The MAX9723 features
Maxim’s industry-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
*Purchase of I
Inc. or one of its sublicensed Associated Companies, conveys
a license under the Philips I
ponents in an I
to the I
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/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX9723A
MAX9723B
MAX9723C
MAX9723D
PART
2
C Standard Specification as defined by Philips.
2
2
C components from Maxim Integrated Products,
C system, provided that the system conforms
SLAVE ADDRESS
________________________________________________________________ Maxim Integrated Products
Stereo DirectDrive Headphone Amplifier
1001100
1001101
1001100
1001101
with BassMax, Volume Control, and I
General Description
2
C Patent Rights to use these com-
MP3-Enabled Cellular
Phones
MP3 Players
Selector Guide
MAXIMUM GAIN (dB)
Applications
2
C*/SMBus™-
+6
+6
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 lead-free 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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max9723aebe Summary of contents

Page 1

... I C Standard Specification as defined by Philips. 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/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ 62mW, DirectDrive Headphone Amplifier Eliminates Bulky DC-Blocking Capacitors ♦ ...

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 (Bit 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 (BIT -10 -20 -30 -40 - CODE Figure 7. MAX9723A/MAX9723B Transfer Function with Bit 5 = ...

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 PACKAGE ...

Page 23

... 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 ____________________ 23 © 2005 Maxim Integrated Products Package Information (continued) Printed USA is a registered trademark of Maxim Integrated Products, Inc. 2 PACKAGE OUTLINE, 4x4 UCSP 1 21-0101 ...

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