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Maxim > Solutions > MP3 and Portable Media Players

Headphone Amplifiers

Maxim's proprietary DirectDrive headphone amplifiers save cost and space of DC-blocking capacitors, produce industry leading click-and-pop performance, and produce an output signal with twice the amplitude of conventional amplifiers.

DATA SHEETS
Display Title/Parts Key Advantages
QV  PDF DirectDrive Headphone Amplifier with External Gain
MAX9820

95mW Stereo Headphone Amplifier with Clickless Operation
QV  PDF Low RF Susceptibility DirectDrive Stereo Headphone Amplifier with 1.8V Compatible Shutdown
MAX9724C, MAX9724D

Lower Supply (Operates Down to 2.5V), RF-Immune Headphone Amplifier
QV  PDF Stereo Headphone Amplifier with BassMax, Volume Control, and Input Mux
MAX9729

Patented DirectDrive Headphone Amplifier with Integrated 3:1 Input Stereo Multiplexer, I²C Interface, and Industry-Leading Click-and-Pop Suppression
QV  PDF DirectDrive, Headphone Amplifier with BassMax, I²C, Volume and Gain Control
MAX9726

QV  PDF Stereo DirectDrive® Headphone Amplifier with BassMax, Volume Control, and I²C
MAX9723

QV  PDF 60mW, DirectDrive, Stereo Headphone Amplifier with Low RF Susceptibility and Shutdown
MAX9724A, MAX9724B

QV  PDF 1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown
MAX9725

QV  PDF 1V, Fixed-Gain, DirectDrive®, Stereo Headphone Amplifier with Shutdown
MAX9721

1V, Fixed-Gain, DirectDrive, Stereo-Headphone Amplifier with Shutdown Ideal for Portable Equipment where Board Space Is at a Premium
QV  PDF 5V, Differential Input, DirectDrive, 130mW Stereo Headphone Amplifiers with Shutdown
MAX9722

Next-Generation DirectDrive Headphone Amplifiers Offer Differential Inputs and 5V Operation
QV  PDF 80mW, DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense
MAX4409

80mW, DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense
QV  PDF 50mW, DirectDrive®, Stereo Headphone Amplifier with SmartSense™ and Shutdown
MAX9720, MAX9720A, MAX9720B

50mW, DirectDrive, Stereo-Headphone Amplifier with SmartSense and Shutdown
QV  PDF 80mW, Fixed-Gain, DirectDrive, Stereo Headphone Amplifier with Shutdown
MAX4411, MAX4411B

No DC blocking caps
QV  PDF 80mW, DirectDrive Stereo Headphone Driver with Shutdown
MAX4410

No DC blocking caps
QV  PDF Dual, Rail-to-Rail, High-Output-Drive Op Amp in UCSP
MAX4369

QV  PDF SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute
MAX4335, MAX4336, MAX4337, MAX4338

QV  PDF High-Output-Drive, Precision, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown
MAX4165, MAX4166, MAX4167, MAX4168, MAX4169




Key Specifications:  Headphone Amplifiers
Part Number Hdph. Amp. VCC
(V)
Hdph. Amp. VCC
(V)
Hdph. Amp. ICC
(mA)
Hdph. Amp. POUT into 32Ω
(mW)
Hdph. Amp. Half Pwr. THD+N
(%)
SNR
(dB)
PSRR
(dB)
Hdph. Amp. Ext. Gain Hdph. Amp. Fxd. Gain
(|V/V|)
Hdph. Amp. Fxd. Gain
(|V/V|)
Features RoHS Available Industry Qualified Package/Pins Smallest Available Pckg.
(mm2)
min max typ @ 1% THD+N A- Weighted min min max max w/pins
MAX9820 NEW! 2.7 5.5 3 95 0.005 - 105 Yes - - - Yes -
TDFN-EP/10
9.6
MAX9729  1.8 3.6 4.8 52 0.035 101 90 No 1.5 20
3:1 Stereo Input Mux
Dedicated Beep Input
I2C/SMBus Compatible Interface
Integrated Volume Control
Software Enabled Bass Boost (BassMax)
Yes Automotive - General
TQFN/28
26
MAX9723  1.8 3.6 4 59 0.007 100 90 No 0.5 2
I2C/SMBus Compatible Interface
Integrated Volume Control
Software Enabled Bass Boost (BassMax)
See Data Sheet -
See Data Sheet/
-
MAX9725  0.9 1.8 2.1 25 0.02 92 80 No 2 4 - Yes -
TQFN/12
UCSP/12
3.3
MAX9721  0.9 1.8 2.2 20 0.008 92 70 No 1 2 - See Data Sheet -
See Data Sheet/
-
MAX9722  2.4 5.5 5.5 130 0.015 103 90 Yes 2 2 Common-Mode Sense Yes Automotive - General
TQFN/16
TSSOP/16
33.4
MAX9720  1.8 3.6 5 50 0.006 100 92 No 1 1.41 SmartSense Automatic Short Circuit Detection Yes -
TSSOP/16
UCSP/16
33.4
MAX4409  1.8 3.6 5 65 0.005 98 86 Yes - - Common-Mode Sense Yes -
TQFN/20
16.8
MAX4411  1.8 3.6 5 65 0.007 98 86 No 1.5 2 Independent Shutdown Controls Yes -
TQFN/20
UCSP/14
4.3
MAX4410  1.8 3.6 7 65 0.006 98 90 Yes - - Independent Shutdown Controls Yes -
TSSOP/14
UCSP/14
33.4
See All Headphone Amplifiers (15)

Key Specifications:  Operational Amplifiers
Part Number Amps. Rail to Rail AVCL VSUPPLY (Total)
(V)
VSUPPLY (Total)
(V)
ICC per Amp.
(µA)
ICC per Amp.
(µA)
VOS
(µV)
CMRR @DC
(dB)
PSRR @DC
(dB)
Input IBIAS
(nA)
Unity Gain BW
(MHz)
Slew Rate
(V/µs)
en
(nV/√Hz)
in
(pA/√Hz)
Low Pwr. Shutdn Package/Pins
min min max typ max max typ typ max typ typ
MAX4165  1 Input/Output 1 2.7 6.5 1300 1500 850 93 88 150 5 2 26 0.4 No
SOT/5
MAX4166  1 850 Yes
µDFN/8
µMAX/8
PDIP(N)/8
SOIC(N)/8
MAX4167  2 850 Yes
PDIP(N)/8
SOIC(N)/8
MAX4168  2 850 Yes
µMAX/10
PDIP(N)/14
SOIC(N)/14
MAX4169  4 1000 No
PDIP(N)/14
SOIC(N)/14
See All Operational Amplifiers (145)



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