Smartphone with Voice Processor

Enabling the best user experience across platforms, Cirrus Logic offers low-power, “always on” voice processors with audio playback and control capabilities.

Smartphone with Voice Processor


Voice Processor
  • HD Voice/wideband and narrow-band support
  • Voice Activity Detector (VAD) for low power “always on” command recognition applications
  • ASR Enhance™ pre-processor for increased ASR accuracy in noise
  • Transmit (Tx) and receive (Rx) noise elimination
  • AEC plus non-linear residual echo suppressor for superior full-duplex echo-free speakerphone operation
  • Ambient aware parametric EQ and automatic level control for both Tx and Rx voice streams
  • Automatic volume control for Rx output
  • Spectrally matched comfort noise generator for Tx voice and comfort noise generator for Rx stream
Boosted Amplifier
  • High efficiency Class-D architecture
    • 3.5 W into 8 ohms @ 1% THD+N
    • 105 µVrms ICN @ 18 dB gain
  • Integrated boost converter up to 8.0V
    • Class-HG tracking of audio signal
    • Battery supply and boost supply monitoring
  • Integrated amplifier output monitoring
  • Over-temperature foldback and protection
  • Short-circuit protection
HiFi D/A Converter
  • 120 dB dynamic range, -107 dB THD+N
  • Stereo 24 bit DAC, 192 kHz sample rate
  • Low-latency digital filters
  • Direct Stream Digital® mode (SACD)
Multi-Mic A/D Converters
  • 91 dB dynamic range, -85 dB THD+N
  • Quad 24 bit ADC, 48 kHz sample rate
  • Low power consumption, <4 mW analog mic record
  • 4 analog mic/line inputs and 2 digital mic SCLK generators
  • Volume control, mute, programmable gain, programmable HPF, noise gate
MEMS Microphone
  • Analog and digital
  • Top and bottom ports
  • Signal-to-noise ratio (SNR):
    • 65 dB [analog]
    • 63 dB [digital]
  • Acoustic overload point (AOP) @ 10% THD:
    • 127 dB SPL [analog]
    • 120 dB SPL [digital]
  • Sensitivity with ±1 dB tolerance:
    • -38 dBV/Pa [analog]
    • -26 dBFS/Pa [digital]

Boosted Amplifiers

Supported Products
  • CS35L33
    8 V Boosted Class-D Amplifier

HiFi D/A Converters

Supported Products
  • CS4398
    120 dB, 24-Bit, 192 kHz Stereo D/A Converter with DSD Support
  • WM8741
    High Performance Stereo DAC

Multi-Mic A/D Converters

Supported Products
  • CS53L30
    Ultra Low Power, 4-Channel Microphone A/D Converter With TDM Interface

MEMS Microphones

Supported Products
  • WM7121PE
    Top Port Analog Silicon Microphone
  • WM7132PE
    Bottom Port Analog Silicon Microphone
  • WM7331E
    Bottom Port Analog Silicon Microphone
  • WM7216E
    Low Power Top Port Digital Silicon Microphone
  • WM7236E
    Bottom Port Digital Silicon Microphone
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