MAX9721
1V, Fixed-Gain, DirectDrive®, Stereo Headphone Amplifier with Shutdown
Show More
1V, Fixed-Gain, DirectDrive, Stereo-Headphone Amplifier with Shutdown Ideal for Portable Equipment where Board Space Is at a Premium
Not the part you were looking for?
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
Search
Other places you can find help
Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
Features
- Single Cell, 0.9V to 1.8V Single-Supply Operation
- Fixed Gain Eliminates External Feedback Network
- MAX9721A: -2V/V
- MAX9721B: -1.5V/V
- MAX9721C: -1V/V
- Ground-Referenced Outputs Eliminate DC Bias
- No Degradation of Low-Frequency Response Due to Output Capacitors
- 20mW per Channel into 32Ω
- Low 0.006% THD+N
- High PSRR (80dB at 1kHz)
- Integrated Click-and-Pop Suppression
- Low Quiescent Current (2.2mA)
- Low-Power Shutdown Control
- Short-Circuit Protection
- ±8kV ESD-Protected Amplifier Outputs
- Available in Space-Saving Packages
- 12-Bump UCSP (1.54mm x 2.02mm x 0.6mm)
- 12-Pin Thin QFN (4mm x 4mm x 0.8mm)
.svg?rev=fd385c90e2cf4716ae9a8c8d20e6b8e3&la=en&h=24&w=24&hash=A302DF48F94BAAA11877AF223F27157A){kind=icon}
The MAX9721 fixed-gain, stereo headphone amplifier is ideal for portable equipment where board space is at a premium. The MAX9721 uses a unique DirectDrive architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height. Fixed gains of -2V/V (MAX9721A), -1.5V/V (MAX9721B), and -1V/V (MAX9721C) further reduce external component count.
The MAX9721 delivers up to 20mW per channel into a 32Ω load and achieves 0.006% THD+N. An 80dB at 1kHz power-supply rejection ratio (PSRR) allows the MAX9721 to operate from noisy digital supplies without an additional linear regulator. The MAX9721 includes ±8kV ESD protection on the headphone output. Comprehensive click-and-pop circuitry suppresses audible clicks and pops at startup and shutdown. A low-power shutdown mode reduces supply current to 1.0µA (typ).
The MAX9721 operates from a single 0.9V to 1.8V supply allowing the device to be powered directly from a single AA or AAA battery. The MAX9721 consumes only 2.2mA of supply current, provides short-circuit protection, and is specified over the extended -40°C to +85°C temperature range. The MAX9721 is available in a tiny (1.54mm x 2.02mm x 0.6mm), 12-bump chip-scale package (UCSP™) and a 12-pin thin QFN package (4mm x 4mm x 0.8mm).
Applications
- Cell Phones
- MP3 Players
- PDAs
- Portable Audio Equipment
- Smartphones
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
Search
Other places you can find help
Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
{{modalTitle}}
{{modalDescription}}
{{dropdownTitle}}
- {{defaultSelectedText}} {{#each projectNames}}
- {{name}} {{/each}} {{#if newProjectText}}
-
{{newProjectText}}
{{/if}}
{{newProjectTitle}}
{{projectNameErrorText}}
MAX9721
Documentation
Filters
1 Applied
-
All
-
Data Sheet
-
All
-
English
-
Chinese
-
Japanese
Data Sheet
3
MAX9721: 1V, Fixed-Gain, DirectDrive®, Stereo Headphone Amplifier with Shutdown Data Sheet (Rev.0)
MAX9721: 1V、固定增益、DirectDrive®、立体声耳机放大器，带有关断 Data Sheet (Rev.0)
Documentation
Software & Part Ecosystem
Evaluation Kits 1
MAX9721EVKIT
Evaluation Kit for the MAX9721
Product Detail
The MAX9721 evaluation kit (EV kit) is a fully assembled and tested circuit board that uses the MAX9721, a DirectDrive™ stereo headphone amplifier with -2V/V fixed gain for single 1.0V applications. The EV kit can be used to evaluate the MAX9721B (-1.5V/V fixed gain) and MAX9721C (-1V/V fixed gain).
Applications
- Cell Phones
- MP3 Players
- PDAs
- Portable Audio Equipment
- Smartphones