The SGM4918 stereo headphone amplifier is designed
for portable equipment where board space is at a
premium. The SGM4918 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 SGM4918B, the gain
is set internally (-2V/V), further reducing component
count. For SGM4918A, the gain can be adjusted by
external feedback resistors.
The SGM4918 delivers up to 80mW per channel into a
32Ω load and has low 0.03% 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. SGM4918AYD10G/TR SGM4918BYD10G/TR资料下载
