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MAX9723
Stereo DirectDrive® Headphone Amplifier with BassMax, Volume Control, and I²C
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Status
Active: In Production.
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.
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Data Sheet
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An evaluation kit is available: MAX9723DEVCMOD2, MAX9723DEVCMODU, MAX9723DEVKIT NOTE: This product uses the following:MAX9723 EVKIT Software
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)
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Applications/Uses
- Automotive Multimedia
- Mini Disc Players
- MP3 Players
- MP3-Enabled Cellular Phones
- PDA Audio
- Portable CD Players
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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 |
Package/Pins |
| min |
max |
typ |
@ 1% THD+N |
A- Weighted |
min |
min |
max |
| 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) |
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See All Headphone Amplifiers (18)
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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 prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Block Diagram
Application Notes
Product Guides
Reliability Reports
Software/Models
Ordering Information
This product cannot be purchased through our web site. Contact factory for availability.
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-3509
Rev 2;
2008-08-22
This page last modified: 2010-05-26
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