MAX9721

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

1V, Fixed-Gain, DirectDrive, Stereo-Headphone Amplifier with Shutdown Ideal for Portable Equipment where Board Space Is at a Premium

Data Sheet (Rev. 0)

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Part Details

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)

Software Resources

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Evaluation Kits

Evaluation Kit for the MAX9721

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Features and Benefits

Single Power Supply: 0.9V to 1.8V
20mW per Channel into 32Ω
25mW per Channel into 16Ω
Low 0.006% THD+N
1µA (typ) IC Shutdown Current
Fixed -2V/V Gain (MAX9721A)
Surface-Mount Construction
Fully Assembled and Tested

Product Details

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

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