帕智电子(上海)有限公司

400 0800 882

产品中心

当前位置:首页 > 产品中心 > 圣邦微 > 音频,视频驱动器 > 耳机驱动器 > SGM4916

产品中心

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

Snap2.png

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℃

电竞大师