
Analog Devices
GENERAL DESCRIPTION
The SSM2517 is a PDM digital input Class-D power amplifier that offers higher performance than existing DAC plus Class-D solutions. The SSM2517 is ideal for power sensitive applications, such as mobile phones and portable media players, where system noise can corrupt the small analog signal sent to the amplifier.
FEATURES
Filterless digital Class-D amplifier
Pulse density modulation (PDM) digital input interface
2.4 W into 4 Ω load and 1.38 W into 8 Ω load at 5.0 V supply
with <1% total harmonic distortion plus noise (THD + N)
Available in 9-ball, 1.5 mm × 1.5 mm, 0.5 mm pitch WLCSP
92% efficiency into 8 Ω at full scale
Output noise: 43 μV rms at 3.6 V, A-weighted
THD + N: 0.035% at 1 kHz, 100 mW output power
PSRR: 85 dB at 217 Hz, input referred with dither input
Quiescent power consumption: 10.4 mW
(VDD = 1.8 V, PVDD = 3.6 V, 8 Ω + 33 μH load)
Pop-and-click suppression
Configurable with PDM pattern inputs
Short-circuit and thermal protection with autorecovery
Smart power-down when PDM stop condition
or no clock input detected
64 × fS or 128 × fS operation supporting 3 MHz and 6 MHz clocks
DC blocking high-pass filter and static input dc protection
User-selectable ultralow EMI emissions mode
Power-on reset (POR)
Minimal external passive components
APPLICATIONS
Mobile handsets