CS44800-CQZ Cirrus Logic Inc, CS44800-CQZ Datasheet - Page 77

• Manufacturer Part Number: CS44800-CQZ
• Description: IC,Audio Power Amplifier Controller,CMOS,QFP,64PIN
• Manufacturer: Cirrus Logic Inc
• Type: Digital Amplifier Controllerr

Specifications of CS44800-CQZ

• Applications: Automotive Systems
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1532 - BOARD EVAL FOR CS44800 PWM CTRL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 598-1070

DS632F1
Signal to Noise Ratio (SNR)
SRC
Total Harmonic Distortion + Noise (THD+N)
9. REFERENCES
1. Cirrus Logic, “Audio Quality Measurement Specification,” Version 1.0, 1997.
2. Cirrus Logic, “AN18: Layout and Design Rules for Data Converters and Other Mixed Signal Devices,”
3. Cirrus Logic, “AN22: Overview of Digital Audio Interface Data Structures, Version 2.0”, February 1998.; A
4. Philips Semiconductor, “The I²C-Bus Specification: Version 2,” Dec. 1998.
SNR, similar to DR, is the ratio of an arbitrary sinusoidal input signal to the RMS sum of the noise floor, in
the presence of a signal. It is measured over a 20 Hz to 20 kHz bandwidth with units in dB.
Sample Rate Converter. Converts data derived at one sample rate to a differing sample rate. The CS44800
operates at a fixed sample frequency. The internal sample rate converter is used to convert digital audio
streams playing back at other frequencies to the PWM output rate.
The ratio of the rms value of the signal to the rms sum of all other spectral components over the specified
band width (typically 10 Hz to 20 kHz), including distortion components. Expressed in decibels. Measured
at -1 and -20 dBFS as suggested in AES17-1991 Annex A.
http://www.cirrus.com/products/papers/meas/meas.html
Version 6.0, February 1998.
useful tutorial on digital audio specifications.
http://www.semiconductors.philips.com
CS44800
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