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CLC014AJE
Adaptive Cable Equalizer for High-Speed Data Recovery
CLC014
Adaptive Cable Equalizer for High-Speed Data Recovery
General DescriptionNational’s CLC014 adaptive cable equalizerisa low-cost
monolithic solutionfor equalizing data transmitted over cable
(or any media with similar dispersive loss characteristics).
The CLC014 simplifiesthe taskof high-speed data recovery
witha one-chip solution anda minimal numberof external
components. The equalizer automatically adaptsto equalize
any cable length from zero metersto lengths that attenuate
the signalby40dBat 200 MHz. This correspondsto 300
metersof Belden 8281or 120 metersof Category5 UTP
(unshielded twisted pair).
The CLC014 provides superior jitter performance:
180psppfor 270 Mbps data that has passed through 200
metersof Belden 8281 cable. This exceptional perfor-
mance provides wide error marginin digital data links.The equalizer operatesona single supply witha power
consumptionof only 290 mW. The small 14-pin SOIC pack-
age allowsfor high-density placementof componentsfor
multi-channel applications suchas routers. The equalizer
operates overa wide rangeof data rates from less than50
Mbpsto ratesin excessof 650 Mbps.
The equalizeris flexiblein allowing either single-endedor
differential input drive.Its high common mode rejection pro-
vides excellent immunityto interference from noise sources.
On-chip quantized feedback eliminates baseline wander.
Additional features includea carrier detect output andan
output mutepin which, when tied together, mutethe output
whenno signalis present.A buffered eye monitor outputis
provided,for viewing the equalized signal priorto the com-
parator. Differential AEC pins allowthe usertosetthe inter-
nal adaptive loop time constant with one external capacitor.
Also,the CLC014is insensitivetothe pathological patterns
inherentinthe video industry standards.
Features Automatic equalizationof coaxial and twisted pair cables Carrier detection and output mute Output eye monitor Single supply operation: +5Vor −5.2V Single-endedor differential input Low cost
Applications SMPTE 259M serial digital interfaces: NTSC/PAL, 4:2:2
component and wide screen; also 540 Mbps (4:4:4:4) Serial digital video routing and distribution Serial digital data equalization and reception Data recovery equalization: ATM, CAD networks,
medical,set top terminals, industrial video networks
Key Specifications Low jitter: 180pspp@ 270 Mbps through 200 metersof
Belden 8281 coaxial cable High data rates:<50 Mbpsto> 650 Mbps Excellent input return loss:19dB@ 270 MHz Low supply current:58 mA Equalizesupto 300+ metersof Belden 8281or 120
metersof Cat5 UTP cable
Typical ApplicationAugust 2003
CLC014
Adaptive
Cable
Equalizer
for
High-Speed
Data
Recovery
