SGM4916 88mW, Capless, Stereo Headphone Amplifier with Shutdown
GENERAL DESCRIPTION
The SGM4916 stereo headphone amplif...
SGM4916 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 supp...