GENERAL DESCRIPTION
The SSM6515 is a fully integrated, high efficiency, mono Class-D audio amplifier with digital input that is ideally suited for use in wireless headphones. The application circuit requires few external components and operates from a 1.8 V (PVDD) supply and a 1.2 V to 1.8 V (IOVDD) supply. With 1.8 V signaling, these can be shared. It can deliver 85 mW of continuous output power into a 16 Ω load with <1% total harmonic distortion plus noise (THD + N).

FEATURES
► Filterless digital input, mono differential output Class-D amplifier
   with 3-level Σ-Δ modulation optimized for headphone drive
► Operates from single 1.8 V supply
► 80 mW output power, 16 Ω load at <0.1% THD + N
► 2.57 μV rms noise, 113 dB A weighted signal-to-noise ratio and
   dynamic range
► 0.003% THD + N at 30 mW, 1 kHz output 32 Ω load
► I2C control with up to 4 pin selectable addresses or standalone
   operation
► Multiple serial data formats
► TDM, I2S, or left justified slave
► PDM input operating from 2.8224 MHz to 12.288 MHz
► Support sample rates from 8 kHz to 768 kHz
► 3.9 μs latency with 6 MHz PDM input
► Flexible digital gain adjustment
► DC blocking high-pass filter with programmable corner frequency
► 1.55 mW typical idle power in high performance mode
► Low power modes for reduced power consumption
► Flexible output gain limiter and clipping
► Auto power-down feature with zero digital input
► Short-circuit protection
► Pop and click suppression
► User-selectable ultralow EMI emissions mode
► Power-on reset
► 1.8 V PVDD supply
► 1.2 V to 1.8 V IOVDD supply
► 11-ball, 0.984 mm × 1.444 mm, 0.35 mm pitch WLCSP

APPLICATIONS
► Wireless headphones
► Active noise canceling headphones
► Smartphone earpiece speakers
► Hearing assistance devices
► Portable electronics