Cirrus Logic CS42L73 - Manual (Page 2)

2 DS882F1
CS42L73
Stereo Analog-to-Digital Features
 91-db dynamic range (A-weighted)
 -85 dB THD+N
 Independent ADC channel control
 2:1 stereo analog input MUX
 Stereo line input: Shared pseudodifferential
reference input
 Dual analog mic inputs
– Pseudodifferential or single-ended
– Two, independent, programmable, low-noise
mic bias outputs
– Mic short detect to support headset button
 Analog programmable gain amplifier (PGA)
(+12 to -6 dB in 0.5 dB steps)
 +10 dB or +20 dB analog mic boost in addition
to PGA gain settings
 Programmable automatic level control (ALC)
– Noise gate for noise suppression
– Programmable threshold and attack/release
rates
Dual Digital Microphone Interface
 Programmable clock rate: Integer divide by 2 or
4 of internal MCLK
Stereo DAC to Headphone Amplifier
 94-dB dynamic range (A-weighted)
 -81 dB THD+N into 32 
 Integrated step-down/inverting charge pump
 Class H amplifier, automatic supply adjustment
– High efficiency
– Low EMI
 Pseudodifferential ground-centered outputs
 High HP power output at -70/-81 dB THD+N
– 2 x 16/8.1 mW into 16/32 @ 1.8 V
 Pop and click suppression
 Analog volume control (+12 to -50 dB in 1 dB
steps; to -76 dB in 2 dB steps) with zero-cross
transitions
 Digital volume control (+12 to -102 dB in 0.5 dB
steps) with soft-ramp transitions
 Programmable peak-detect and limiter
Stereo DAC to Line Outputs
 97 dB dynamic range (A-weighted)
 -86 dB THD+N
 Class-H amplifier
 Pseudodifferential ground-centered outputs
 1-V
RMS
line output @ 1.8 V
 Pop and click suppression
 Analog volume control (+12 to -50 dB in 1 dB
steps; to -76 dB in 2 dB steps) with zero-cross
transitions
 Digital volume control (+12 to -102 dB in 0.5 dB
steps) with soft-ramp transitions
 Programmable peak-detect and limiter
Mono DAC to Ear Speaker Amplifier
 High-power output at -70 dB (0.032%) THD+N:
45 mW into 16  @ 1.8 V
 Pop and click suppression
 Digital volume control (+12 to -102 dB in 0.5 dB
steps) with soft-ramp transitions
 Programmable peak-detect and limiter
Mono DAC to Speakerphone Amplifier
 High output power at 1% THD+N: 1.06/0.76/
0.59 W into 8  @ 5.0/4.2/3.7 V
 Direct battery-powered operation
 Pop and click suppression
 Digital volume control (+12 to -102 dB in 0.5 dB
steps) with soft-ramp transitions
 Programmable peak-detect and limiter
Mono DAC-to-Speakerphone Line
Output
 84 dB dynamic range (A-weighted)
 -65 dB THD+N
 High voltage (2 V
RMS
@ VA = 1.8 V, VP =
3.7 V) line output to ensure maximum output
from a wide variety of external amplifiers
 Pop and click suppression
 Digital volume control (+12 to -102 dB in 0.5 dB
steps) with soft-ramp transitions
 Programmable peak-detect and limiter
Serial Ports
 Three independent serial ports: auxiliary serial
port (XSP), audio serial port (ASP), and voice
serial port (VSP)
 8.00, 11.025, 12.00, 16.00, 22.05, 24.00,
32.00, 44.10, and 48.00 kHz sample rates
 All ports support master or slave operation with
I²S interface
 XSP and VSP support slave operation with
PCM interface
 XSP and ASP are stereo-input/stereo-output
to/from digital mixer
 VSP is mono-input/stereo-output to/from digital
mixer
 Integrated asynchronous sample rate
converters