MAX9723

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


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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 performance is essential. The MAX9723 operates from a single 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 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 control features 32 discrete volume levels, eliminating the need for an external potentiometer. BassMax and the volume control are enabled through the I²C/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.
MAX9723: Block Diagram MAX9723: Block Diagram Enlarge+

Key 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)
  • I²C/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)

Applications/Uses

  • Mini Disc Players
  • MP3 Players
  • MP3-Enabled Cellular Phones
  • PDA Audio
  • Portable CD Players
Part NumberHdph. 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. GainHdph. Amp. Fxd. Gain
(|V/V|)
Hdph. Amp. Fxd. Gain
(|V/V|)
Package/PinsBudgetary
Price
minmaxtyp@ 1% THD+NA- WeightedminminmaxSee Notes
MAX9723 1.83.64590.00710090No0.52
TQFN/16
UCSP (B)/16
$0.63 @1k
See All Headphone Amplifiers (8)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX9723DEVCMOD2: Evaluation Kit/Evaluation System for the MAX9723A, MAX9723B, MAX9723C, and MAX9723D
MAX9723DEVCMODU: Evaluation Kit/Evaluation System for the MAX9723A, MAX9723B, MAX9723C, and MAX9723D
MAX9723DEVKIT: Evaluation Kit/Evaluation System for the MAX9723A, MAX9723B, MAX9723C, and MAX9723D
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Environmental Management System >

 
Status:
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Temperature:

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