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MAX9723BEBE+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
General Description
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 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
2
C/SMBus™-
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.
Applications
Features
♦ 62mW, DirectDrive Headphone Amplifier
Eliminates Bulky DC-Blocking Capacitors
♦ 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
2
C/SMBus-Compatible Interface
♦ Available in Space-Saving, Thermally Efficient
Packages:
16-Bump UCSP (2mm x 2mm x 0.62mm)
16-Pin Thin QFN (4mm x 4mm x 0.8mm)
MAX9723
Stereo DirectDrive Headphone Amplifier
with BassMax, Volume Control, and I
2
C
________________________________________________________________ Maxim Integrated Products 1
I
2
C INTERFACE
VOLUME
CONTROL
BassMax
BassMax
1.8V TO 3.6V SUPPLY
SCL
BBL
OUTL
BBR
OUTR
SDA
INL
INR
MAX9723
Σ
Σ
Block Diagram
Ordering Information
19-3509; Rev 2; 8/08
EVALUATION KIT
AVAILABLE
PART**
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX9723_EBE-T*
-40°C to +85°C
16 UCSP-16
B16-1
MAX9723_ETE+
-40°C to +85°C
16 TQFN
T1644-4
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.
**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.
PDA Audio
Portable CD Players
Mini Disc Players
Automotive Multimedia
MP3-Enabled Cellular
Phones
MP3 Players
PART
SLAVE ADDRESS
MAXIMUM GAIN (dB)
MAX9723A
1001100 0
MAX9723B
1001101 0
MAX9723C
1001100 +6
MAX9723D
1001101 +6
Selector Guide
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.
MAX9723
Stereo DirectDrive Headphone Amplifier
with BassMax, Volume Control, and I
2
C
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
SGND to PGND .....................................................-0.3V to +0.3V
V
DD
to PGND............................................................-0.3V to +4V
PV
SS
to SV
SS
.........................................................-0.3V to +0.3V
C1P to PGND..............................................-0.3V to (V
DD
+ 0.3V)
C1N to PGND............................................(PV
SS
- 0.3V) to +0.3V
PV
SS
, SV
SS
to PGND ................................................+0.3V to -4V
IN_ to SGND ..................................(SV
SS
- 0.3V) to (V
DD
+ 0.3V)
SDA, SCL to PGND ..................................................-0.3V to +4V
SHDN to PGND ..........................................-0.3V to (V
DD
+ 0.3V)
OUT_ to SGND ............................................................-3V to +3V
BB_ to SGND...............................................................-2V to +2V
Duration of OUT_ Short Circuit to _GND ....................Continuous
Continuous Current Into/Out of:
V
DD
, C1P, PGND, C1N, PV
SS
, SV
SS
, or OUT_ ..............±0.85A
Any Other Pin.................................................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
4 x 4 UCSP (derate 8.2mW/°C above +70°C) ...........659.2mW
16-Pin Thin QFN (derate 16.9mW/°C above +70°C) ....1349mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Bump Temperature (soldering)
Reflow ...........................................................................+230°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
DD
= SHDN = 3V, PGND = SGND = 0V, C1 = C2 = 1µF, BB_ = 0V. gain = 0dB, maximum volume, BassMax disabled. Load connect-
ed between OUT_ and SGND where specified. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
GENERAL
Supply Voltage Range V
DD
1.8 3.6 V
Quiescent Supply Current I
DD
No load 4 6.5 mA
Shutdown Supply Current
I
DD_SHDN
V
SHDN
= 0V 5 8.5 µA
Turn-On Time t
ON
200
µs
Turn-Off Time t
OFF
35 µs
Thermal Shutdown Threshold T
THRES
+143
°C
Thermal Shutdown Hysteresis T
HYST
12 °C
HEADPHONE AMPLIFIER
Gain = 0dB,
MAX9723A/
MAX9723B
±0.7 ±4.5
Output Offset Voltage V
OS
M easur ed b etw een
OU T_ and S GN D
( N ote 2)
Gain = +6dB,
MAX9723C/
MAX9723D
±0.8
±5
mV
Input Resistance R
IN
All volume levels 10 17 27 kΩ
BBR, BBL Input Bias Current
I
BIAS_BB
±10 ±100
nA
DC, V
DD
= 1.8V to 3.6V 73 90
f = 217Hz, 100mV
P-P
ripple,
V
DD
= 3.0V
87
f = 1kHz, 100mV
P-P
ripple,
V
DD
= 3.0V
86
Power-Supply Rejection Ratio PSRR (Note 2)
f = 20kHz, 100mV
P-P
ripple,
V
DD
= 3.0V
61
dB
MAX9723
Stereo DirectDrive Headphone Amplifier
with BassMax, Volume Control, and I
2
C
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= SHDN = 3V, PGND = SGND = 0V, C1 = C2 = 1µF, BB_ = 0V. gain = 0dB, maximum volume, BassMax disabled. Load connect-
ed between OUT_ and SGND where specified. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
R
L
= 32Ω 59
Output Power P
OUT
THD+N = 1%,
f
IN
= 1kHz
R
L
= 16Ω (Note 5) 38 60
mW
R
L
= 16Ω, P
OUT
= 35mW, f
IN
= 1kHz
0.006
Total Harmonic Distortion Plus
Noise
THD+N
R
L
= 32Ω, P
OUT
= 45mW, f
IN
= 1kHz
0.004
%
Gain range bit 5 = 1 0
MAX9723A/
MAX9723B
Gain range bit 5 = 0 -5
dB
Gain range bit 5 = 1 +6
Maximum Gain A
MAX
MAX9723C/
MAX9723D
Gain range bit 5 = 0 +1
dB
BW = 22Hz to 22kHz 99
Signal-to-Noise Ratio SNR
R
L
= 32Ω,
V
OUT
= 1V
RMS A-weighted
100
dB
Slew Rate SR
0.35
V/µs
Capacitive Drive No sustained oscillations
300
pF
Output Resistance in Shutdown
R
OUT_SHDN
V
SHDN
= 0V, measured from OUT_ to
SGND
20 kΩ
Output Capacitance in Shutdown
C
OUT_SHDN
V
SHDN
= 0V, measured from OUT_ to
SGND
60 pF
Into
shutdown
-69
MAX9723A/
MAX9723B
Out of
shutdown
-71
Into
shutdown
-70
Click/Pop Level K
CP
R
L
= 32Ω,
peak voltage,
A-weighted,
32 samples
per second
(Notes 2, 4)
MAX9723C/
MAX9723D
Out of
shutdown
-69
dB
Charge-Pump Switching
Frequency
f
CP
505 600
700 kHz
Crosstalk XTALK
L to R or R to L, f = 10kHz,
V
OUT
= 1V
P-P
, R
L
= 32Ω, both channels
loaded
80 dB
DIGITAL INPUTS (SHDN, SDA, SCL)
Input High Voltage V
IH
0.7 x
V
DD
V
Input Low Voltage V
IL
0.3 x
V
DD
V
Input Leakage Current ±1µA
DIGITAL OUTPUTS (SDA)
Output Low Voltage V
OL
I
OL
= 3mA 0.4 V
Output High Current I
OH
V
SDA
= V
DD
1µA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

MAX9723BEBE+T

Mfr. #:
Buy MAX9723BEBE+T
Manufacturer:
Maxim Integrated
Description:
Audio Amplifiers Stereo DirectDrive Headphone Amplifier
Lifecycle:
New from this manufacturer.
Delivery:
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