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    SGM4916

    88mW, Capless, Stereo Headphone Amplifier with Shutdown
     
    88mW, Capless, Stereo Headphone Amplifier with Shutdown
    GENERAL DESCRIPTION

    The SGM4916 stereo headphone amplifier is designed for portable equipment where board space is at a premium. The SGM4916 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 SGM4916B, the gain is set internally (-1.5V/V), further reducing component count. For SGM4916A, the gain can be adjusted by external feedback resistors.

    The SGM4916 delivers up to 88mW per channel into a 32Ω load and has low 0.034% THD+N. A -70dB 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.

    The SGM4916 operates from a single 2.7V to 5.5V supply, consumes only 2.7mA supply current, has short-circuit and thermal-overload protections, and is specified over the extended -40 to +85℃ temperature range. The SGM4916 is available in a Green TQFN-3×3-12L package.

    PIN CONFIGURATIONS

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    FEATURES
    • SGM4916A: External Feedback Gain Network

      SGM4916B: Fixed -1.5V/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

    • 88mW into 32Ω Load from 5V Power Supply at THD+N = 0.1% (TYP, per Channel)

    • Low 0.034% THD+N

    • High PSRR (-70dB at 217Hz)

    • Integrated Click-and-Pop Suppression

    • 2.7V to 5.5V Single Supply Operation

    • Low Quiescent Current (2.7mA at VDD = 5V)

    • Shutdown Control

    • Short-Circuit and Thermal-Overload Protections

    • Under-Voltage Lockout Function

    • -40 to +85 Operating Temperature Range

    • Available in a Green TQFN-3×3-12L Package

    APPLICATIONS

    Notebook PCs

    Cellular Phones

    PDAs

    MP3 Players

    Smart Phones

    Portable Audio Equipment

    ORDERING INFORMATION
    Part NumberStatusPackagePinsPb-FreeTemp Range
    SGM4916AYTQJ12G/TRProductionTQFN-3×3-12L12Y-40℃ to +85℃
    SGM4916BYTQJ12G/TRProductionTQFN-3×3-12L12Y-40℃ to +85℃

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