Overview
Features and Benefits
- Audio System IC (MAX4299)
- Ultra-High PSRR Stereo Headphone Driver
- Ultra-High PSRR Microphone Amp
- 100mA, 3.3V Linear Regulator
- 93dB typ PSRR at 20kHz Operates Directly from Noisy Digital Supplies
- Clickless/Popless Power Up, Power Down, Mute and Unmute
- PC99 Compliant Output Drivers:
- Better than 1VRMS Output into 16Ω Load and 1.5VRMS and 0.0008% THD+N into 10kΩ Load
- PC99-Compliant Microphone Amplifier:
- 0.005% THD+N into 10kΩ Load
- 22nF Capacitive Load Drive Capability
- 4.5V to 5.5V Single-Supply Operation
- Internally Generated Bias Voltage
- All Gains Externally Adjustable
- Available in Space-Saving Packages
- 10-Pin µMAX (MAX4298)
- 16-Pin TSSOP (MAX4299)
Product Details
The MAX4298 and MAX4299 are audio system ICs designed for single +5V applications. The MAX4299 features a stereo headphone driver, a microphone amplifier, and a +3.3V linear regulator; the MAX4298 features a stereo headphone driver. The MAX4298/MAX4299 are designed specifically for harsh digital environments where board space is at a premium and the digital power supply is noisy. The design uses innovative design techniques to achieve ultra-high power-supply rejection across the audio signal band while, at the same time, delivering a high-current Rail-to-Rail output drive capability. The chip is designed to drive highly capacitive loads that may be encountered when driving long cables to a remote load such as desktop/notebook headphones or speakers. These devices are fully compliant with PC99 standards.
The amplifiers exhibit 115dB of DC power-supply rejection and 80dB at 100kHz. The output amplifiers are capable of driving a 1.5VRMS signal into a 10-kilohm load with 0.0008% THD+N. They can also drive 32Ω headphones to 1.2VRMS with 0.02% distortion. At +3.3V, the linear regulator can output 100mA of current. The MAX4298 is available in a tiny 10-pin µMAX® while the MAX4299 is available in the space-saving 16-pin TSSOP package.
Applications
- Computers: Desktop, Workstation, Server
- Consumer Audio
- Cordless Phones
- Notebook Computers
- Palmtop Computers
- Pen Entry Palmtops
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Design Resources
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PCN-PDN Information
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