The SGM4914 stereo headphone amplifier is designed
for portable equipment where board space is at a
premium. The SGM4914 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 SGM4914B and
SGM4914C, the gain is set internally (-2V/V or -1.5V/V),
further reducing component count. For SGM4914A, the
gain can be adjusted by external feedback resistors.
The SGM4914 delivers up to 95mW per channel into a
32Ω load and has low 0.01% THD+N. A -90dB 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. Independent left/right, low-power
shutdown controls make it possible to optimize power
savings in mixed-mode, mono/stereo applications.
SGM4914AYTQI20G/TR SGM4914BYTQI20G/TR SGM4914CYTQI20G/TR资料下载
