Product Details
Key Features
Applications/Uses
Simplified Block Diagram
Technical Docs
Data Sheet | DirectDrive, Headphone Amplifier with BassMax, I²C, Volume and Gain Control | Apr 01, 2008 |
Support & Training
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Sampling:
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Key Features
- 105mW DirectDrive Headphone Amplifier Eliminates Bulky DC-Blocking Capacitors
- 2.7V to 5.5V Single-Supply Operation
- Integrated 64-Level Volume Control
- High 85dB PSRR at 1kHz
- Software-Enabled Bass Boost (BassMax)
- Industry-Leading Click-and-Pop Suppression
- ±7kV HBM ESD-Protected Headphone Outputs
- Short-Circuit and Thermal-Overload Protection
- Low-Power Shutdown Mode (8µA)
- Low 0.02% THD+N
- I²C/SMBus-Compatible Interface
- Available in Space-Saving, Thermally Efficient Packages
- 20-Bump UCSP (2mm x 2.5mm x 0.62mm)
- 20-Pin Thin QFN (4mm x 4mm x 0.75mm)
Applications/Uses
- Automotive Rear-Seat Entertainment (RSE)
- Cell Phones
- Flat-Panel TVs
- MP3/PMP Players
- Portable CD/DVD/MD Players
Description
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 105mW into a 32Ω load and feature low 0.02% THD+N.
The BassMax feature boosts the bass response of the amplifier, improving audio reproduction when using inexpensive headphones. The integrated volume control features 64 discrete volume levels, eliminating the need for an external potentiometer. External resistors set the MAX9726's overall gain allowing for custom gain settings.
BassMax and the volume control are enabled through the I²C/SMBus™-compatible interface. Shutdown can be controlled through the hardware or software interface.
The MAX9726 consumes only 5.5mA of supply current, provides short-circuit and thermal-overload protection, and is specified over the -40°C to +85°C extended temperature range. The MAX9726 is available in a tiny (2mm x 2.5mm x 0.62mm) 20-bump chip-scale package (UCSP™) and a 20-pin thin QFN package (4mm x 4mm x 0.75mm).
Technical Docs
Data Sheet | DirectDrive, Headphone Amplifier with BassMax, I²C, Volume and Gain Control | Apr 01, 2008 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.