80mW, Capless, Stereo Headphone Amplifier with Shutdown CXAR41190 capless architecture to produce a ground-referenced output from a single power supply, eliminating the need for large DC-blocking capa

   产品概述 返回TOPbZc嘉泰姆

The CXAR41190 stereo headphone amplifier is designed for portable equipment where board space is at a premium. The CXAR41190 uses capless architecture to produce a ground-referenced output from a single power supply, eliminating the need for large DC-blocking capacitors for output, saving cost, board space, and component height. Additionally, for CXAR41190B, the gain is set internally (-2V/V), further reducing component count. For CXAR41190A, the gain can be adjusted by external feedback resistors.bZc嘉泰姆

The CXAR41190 delivers up to 80mW per channel into a 32Ω load and has low 0.02% THD+N. A -78dB power supply rejection ratio (PSRR) at 217Hz allows this device to operate from noisy digital supplies without an additional linear regulator. Comprehensive click-and-pop circuitry suppresses audible clicks and pops on startup and shutdown.bZc嘉泰姆

The CXAR41190 operates from a single 2.7V to 5.5V supply, consumes only 2.7mA supply current, and is specified over the extended -40℃</span> to +85℃</span> temperature range. The CXAR41190 is available in a Green TQFN-3×3-16L package.bZc嘉泰姆

   产品特点 返回TOPbZc嘉泰姆

• CXAR41190A: External Feedback Gain Network
    CXAR41190B: Fixed -2V/V Gain
• No Bulky DC-Blocking Capacitors Required
• Ground-Referenced Outputs Eliminate DC-Bias
    Voltage on Headphone Ground Pin
• No Degradation of Low-Frequency Response Due
    to Output Capacitors
• Differential Inputs for Enhanced Noise Cancellation
• 80mW into 32Ω Load from 5V Power Supply at
    THD+N = 0.1% (TYP, per Channel)
• Low 0.02% THD+N
• High PSRR (-78dB at 217Hz)
• Integrated Click-and-Pop Suppression
• 2.7V to 5.5V Single Supply Operation
• Low Quiescent Current (2.7mA at V_DD = 5V)
• Shutdown Control
• Undervoltage Lockout Function
• -40℃</span> to +85℃</span> Operating Temperature Range
• Available in Green TQFN-3×3-16L PackagebZc嘉泰姆

   应用范围 返回TOPbZc嘉泰姆

Notebook PCs
Cellular Phones
PDAs
MP3 Players
Smart Phones
Portable Audio EquipmentbZc嘉泰姆

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