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Part: MAX3802
Category:
Communication
-> Fiber Optics
Description: 3.2Gbps Quad Adaptive Cable Equalizer With Cable Driver
Company: Maxim Integrated Products
Datasheet: Download MAX3802 datasheet File size : 711 kB
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Datasheet text preview:
19-2289; Rev 0; 1/02
KIT ATION EVALU LABLE AVAI
3.2Gbps Quad Adaptive Cable Equalizer with Cable Driver
General Description Features
o Single 3.3V Operation o Four Independent Equalizers and Drivers o 725mW at 3.3V Typical Power Dissipation o Data Rates Up to 3.2Gbps o Equalizer Automatically Adjusts for Different Cable Lengths o 0 to 30dB Equalization at 1.6GHz (3.2Gbps) o Loss-of-Signal (LOS) Indicator o On-Chip Input and Output Terminations o Low External Component Count o 0°C to +85°C Operating Temperature Range o ESD Protection on Cable Inputs and Outputs
MAX3802
The MAX3802 has four independent adaptive cable e q u a l i z e r s and cable drivers on a single chip. It is designed for coaxial and twin-axial cable point-to-point scrambled-data communication applications. The driv e r features differential current-mode logic (CML) inputs and outputs. The equalizer includes differential CML data inputs and outputs and a TTL loss-of-signal (LOS) output. The adaptive cable equalizer can equalize differential or single-ended signals at data rates up to 3.2Gbps. It automatically adjusts to attenuation caused by skineffect losses of 30dB at 1.6GHz. The equalizer effect i v e l y extends the usable length of copper cable in high-frequency interconnect applications.
Applications
High-Speed Links in Communications and Data Systems Backplane and Twin-Axial Cable Interconnects Category 5 UTP-Based Systems Digital Video Systems
Pin Configuration appears at end of data sheet.
Ordering Information
PART MAX3802UGK TEMP RANGE 0°C to +85°C PIN-PACKAGE 68 QFN*
*Exposed pad
Typical Application Circuit
3.3V 3.3V
EP* DIN_
VCC DOUT_ MAX3802 4 COAX, TWIN-AX, OR PC BOARD x 4 4
EP* EIN_
VCC EOUT_ MAX3802 4 CARD 2 DIN_ RMOD_ 4 CIM_ 4 4
4 CARD 1 4
EOUT_ LOS_ 4 RMOD_ 4
EIN_ CIM_ 4 RMOD_
4
COAX, TWIN-AX, OR PC BOARD x 4
4
DOUT_ LOS_ 4
RMOD_
THIS SYMBOL INDICATES A CONTROLLED-IMPEDANCE TRANSMISSION LINE. *EP MUST BE SOLDERED TO GROUND FOR PROPER THERMAL AND ELECTRICAL PERFORMANCE.
________________________________________________________________ Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
3.2Gbps Quad Adaptive Cable Equalizer with Cable Driver MAX3802
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC....-0.5V to +6.0V Voltage at LOS_, CIM_, and RMOD_ .........-0.5V to (VCC + 0.5V) Voltage at EIN_+, EIN_-, DIN_+, and DIN_- ..(VCC - 1V) to (VCC + 0.5V) Current Out of EOUT_+, EOUT_-, DOUT_+, and DOUT_- .........25mA Continuous Power Dissipation (TA = +85°C) 68-Pin QFN (derate 44.8mW/°C above +85°C) ....1.44W Operating Ambient Temperature Range .......0°C to +85°C Storage Ambient Temperature Range......-55°C to +150°C Lead Temperature (soldering, 10s) .........+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = 3.14V to 3.46V, TA = 0°C to +85°C. Typical values are at VCC = 3.3V and TA = +25°C, unless otherwise noted.)
PARAMETER Supply Current SYMBOL ICC VDIN_+, V DIN_ V DIN_ Single ended RMOD_ = 10k (Note 2) RMOD_ = 20k (Note 2) Single ended CONDITIONS Includes external load current (Note 1) VCC 0.6 400 40 750 400 50 50 825 445 62.5 MIN TYP 220 MAX 345 VCC + 0.2 1100 60 1000 550 75 UNITS mA
CABLE DRIVER INPUT SPECIFICATIONS Input Voltage (Single Ended) Input Voltage (Differential) Input Impedance CABLE DRIVER OUTPUT SPECIFICATIONS Output Voltage (Differential) Output Impedance CABLE EQUALIZER INPUT SPECIFICATIONS Minimum Cable Input (Differential) Maximum Cable Input (Differential) Input Impedance CABLE EQUALIZER OUTPUT SPECIFICATIONS Output Voltage (Differential) Output Impedance Voltage at LOS_ (Note 2) Single ended Output high (Note 4) Output low (Note 4) 500 50 2.4 0.4 62.5 1000 75 mVP-P V 40 3.2Gbps, 30dB cable loss (Note 3) 600 50 60 400 mVP-P mVP-P mVP-P V mVP-P
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3.2Gbps Quad Adaptive Cable Equalizer with Cable Driver
AC ELECTRICAL CHARACTERISTICS
(VCC = 3.14V to 3.46V, TA = 0°C to +85°C. Typical values are at VCC = 3.3V and TA = +25°C, unless otherwise noted.)
PARAMETER Maximum Input Data Rate CABLE DRIVER SPECIFICATIONS Random Jitter Deterministic Jitter Output Edge Speed Input Return Loss (Differential) Output Return Loss (Differential) EQUALIZER SPECIFICATIONS 0dB cable loss (Note 8) Residual Jitter (Notes 7, 9) Output Edge Speed Input Return Loss (Differential) Output Return Loss (Differential) Equalizer Compensation Equalizer Time Constant 24dB cable loss (Note 8) 30dB cable loss (Note 8) 20% to 80% 2.5GHz 2.5GHz 1.6GHz (skin-effect losses only) (Note 10) 30 6 0.10 0.11 0.08 60 -16 -14 0.24 0.20 0.20 90 ps dB dB dB µs UIP-P 3.2Gbps input (Notes 6, 9) 20% to 80% 2.5GHz 2.5GHz 2.7 20 60 -20 -13 4 60 90 mUIRMS mUIP-P ps dB dB SYMBOL CONDITIONS MIN 3.2 TYP MAX UNITS Gbps
MAX3802
Note 1: Note 2: Note 3: Note 4: Note 5: Note 6:
Equalizer total currents (equalizer with maximum equalization) and RMOD = 10k (maximum driver swing). Input voltage within specification limits, 50 to VCC at each output. Minimum cable input for LOS_ to deassert high. 100k load to ground. The minimum input signal level that turns off the LOS_ alarm depends on the data rate and cable length. AC electrical characteristics are guaranteed by design and characterization. VDIN_ = 400mVP-P to 1100mVP-P (differential), 10k RMOD_ 20k, 3.2Gbps 213 -1 PRBS plus 100 consecutive ones and 100 consecutive zeros. Note 7: Includes random jitter and deterministic jitter for BER of 10-12. Note 8: Differential cable input voltage = 400mVP-P, 3.2Gbps 213 -1 PRBS plus 100 consecutive ones and 100 consecutive zeros. Note 9: Isolation test: three channels driven with identical 3.2Gbps PRBS with maximum input signal to each equalizer and maximum input signal on driver. The measured channel meets the residual and random jitter specifications with an uncorrelated 3.2Gbps PRBS data at minimum input signal level on equalizer and maximum signal level on driver. Note 10: Equalizer time constant measured from data on to closed-loop operation.
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