CS5317-KS datasheet(1/32 Pages) CIRRUS

Part #	CS5317-KS

Description	16-Bit, 20 kHz Oversampling A/D Converter

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Manufacturer	CIRRUS [Cirrus Logic]

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Cirrus Logic, Inc.

Crystal Semiconductor Products Division

P.O. Box 17847, Austin, Texas 78760

(512) 445 7222 FAX: (512) 445 7581

http://www.crystal.com

CS5317

16-Bit, 20 kHz Oversampling A/D Converter

Features

l Complete Voiceband DSP Front-End

- 16-Bit A/D Converter

- Internal Track & Hold Amplifier

- On-Chip Voltage Reference

- Linear-Phase Digital Filter

l On-Chip PLL for Simplified Output Phase

Locking in Modem Applications

l 84 dB Dynamic Range

l 80 dB Total Harmonic Distortion

l Output Word Rates up to 20 kHz

l DSP-Compatible Serial Interface

l Low Power Dissipation: 220 mW

Description

The CS5317 is an ideal analog front-end for voiceband

signal processing applications such as high-perfor-

mance modems, passive sonar, and voice recognition

systems. It includes a 16-bit A/D converter with an inter-

nal track & hold amplifier, a voltage reference, and a

linear-phase digital filter.

An on-chip phase-lock loop (PLL) circuit simplifies the

CS5317’s use in applications where the output word rate

must be locked to an external sampling signal.

The CS5317 uses delta-sigma modulation to achieve

16-bit output word rates up to 20 kHz. The delta-sigma

technique utilizes oversampling followed by a digital fil-

tering and decimation process. The combination of

oversampling and digital filtering greatly eases antialias

requirements. Thus, the CS5317 offers 84 dB dynamic

range and 80 dB THD and signal bandwidths up to

10 kHz at a fraction of the cost of hybrid and discrete

solutions.

The CS5317’s advanced CMOS construction provides

low power consumption of 220 mW and the inherent re-

liability of monolithic devices.

ORDERING INFORMATION

See page 20.

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