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Part: MAX3800UHJ
Category:
Communication
-> Fiber Optics
Description: MAX3800 3.2Gbps Adaptive Equalizer And Cable Driver
Company: Maxim Integrated Products
Datasheet: Download MAX3800UHJ datasheet File size : 711 kB
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Datasheet text preview:
19-1953; Rev 1; 11/01
3.2Gbps Adaptive Equalizer and Cable Driver
General Description
The MAX3800 is a +3.3V adaptive cable equalizer and cable driver implemented together on a single chip. It is designed for coaxial and twin-axial cable point-to-point communications applications. The driver features differential current-mode logic (CML) inputs and outputs as w e l l as adjustable output amplitude. The equalizer includes differential CML data inputs and outputs, a loss-of-signal (LOS) output, and a cable integrity monitor (CIM) output. The adaptive cable equalizer is capable of equalizing differential or single-ended signals at data rates up to 3.2Gbps. It automatically adjusts to attenuation caused b y skin-effect losses of up to 30dB at 1.6GHz. The equalizer effectively extends the usable length of copper cable in high-frequency interconnect applications. The MAX3800 is available in a 32-pin TQFP package w i t h exposed pad and consumes only 200mW at +3.3V. The driver can be disconnected from the power supply when it is not needed, resulting in a 40% reduction in supply current. o Single +3.3V Operation o Typical Power Dissipation = 200mW at +3.3V o Data Rates Up to 3.2Gbps o Adjustable Cable Driver Output Amplitude o Equalizer Automatically Adjusts for Different Cable Lengths o 0dB to 30dB Equalization at 1.6GHz (3.2Gbps) o Loss-of-Signal (LOS) Indicator o Cable Integrity Monitor (CIM) o On-Chip Input and Output Terminations o Low External Component Count o Operating Temperature Range = 0°C to +85°C o ESD Protection on Cable Inputs and Outputs
Features
MAX3800
Applications
High-Speed Links in Communications and Data Systems Backplane and Interconnect Applications SDH/SONET Transmission Equipment
Pin Configuration appears at end of data sheet.
PART MAX3800UGJ MAX3800UHJ
Ordering Information
TEMP. RANGE 0°C to +85°C 0°C to +85°C PIN-PACKAGE 32 QFN 32 TQFP-EP*
*EP = exposed pad
Typical Application Circuit
+3.3V +3.3V
DIN CARD 1 MAX3800 EOUT LOS RMOD
DOUT
EIN MAX3800
EOUT CARD 2 DIN RMOD CIM
EIN CIM
DOUT LOS
THIS SYMBOL INDICATES A CONTROLLED-IMPEDANCE TRANSMISSION LINE.
________________________________________________________________ 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 Adaptive Equalizer and Cable Driver MAX3800
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC....-0.5V to +6.0V Voltage at LOS, RMOD, and CIM......-0.5V to (VCC + 0.5V) Voltage at EIN+, EIN-, DIN+, DIN- .....(VCC - 1V) to (VCC + 0.5V) Current Out of EOUT+, EOUT-, DOUT+, DOUT- .......25mA Continuous Power Dissipation (TA = +85°C) 32-Pin TQFP-EP (derate 22.2mW/°C above +85°C) ...1444mW Operating Ambient Temperature Range .......0°C to +85°C Storage 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 I CC V DIN+, V DINV DIN VDIN = (VDIN+) - (VDIN-) Single-ended RMOD = 10k (Note 2) RMOD = 20k (Note 2) Single-ended 3.2Gbps, 30dB cable loss at 1.6GHz (Note 3) Single-ended (Note 2) Single-ended V CIM V CIM+, V CIMNo external load, VCIM = (VCIM+) - (VCIM-) No external load Output high (Note 4) Output low (Note 4) Each output DC-coupled 50 to VCC VCC - 0.2 45 500 50 -0.5 0.5 2.4 0.4 62.5 CONDITIONS Includes external load current (Note 1) V CC - 0.6 400 45 750 400 50 55 870 450 62.5 650 1100 55 65 1000 75 +0.5 V CC - 0.5 MIN TYP 65 MAX 85 V CC + 0.2 1100 65 1000 550 75 700 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 Output Voltage (Differential) Output Impedance Voltage at CIM Output (Differential) Voltage at CIM Output (Single-Ended) Voltage at LOS Output Common-Mode Voltage CABLE EQUALIZER OUTPUT SPECIFICATIONS mVp-p Vp-p V V V V mVp-p mVp-p mVp-p mVp-p V mVp-p
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3.2Gbps Adaptive Equalizer and 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.) (Note 5)
PARAMETER Maximum Input Data Rate CABLE DRIVER SPECIFICATIONS Random Jitter Deterministic Jitter Output Edge Speed Input Return Loss (Single-Ended) Output Return Loss (Single-Ended) EQUALIZER SPECIFICATIONS 0dB cable loss (Note 8) Residual Jitter (Note 7) Output Edge Speed Input Return Loss (Single-Ended) Output Return Loss (Single-Ended) Equalization Compensation Equalization Time Constant 24dB cable loss (Note 8) 30dB cable loss (Note 8) 20% to 80% 3.2GHz 3.2GHz 1.6GHz (skin-effect losses only) 30 5 170 97 112 56 14 14 240 200 200 77 mUIp-p mUIp-p mUIp-p ps dB dB dB µs (Note 6) (Note 6) 20% to 80% 3.2GHz 3.2GHz 2 20 59 14 14 4 60 76 mUIRMS mUIp-p ps dB dB SYMBOL CONDITIONS MIN 3.2 TYP MAX UNITS Gbps
MAX3800
Note 1: Note 2: Note 3: Note 4: Note 5: Note 6:
Equalizer and driver total currents (equalizer with maximum equalization and driver with maximum output swing). Input voltage within specification limits, 50 to VCC at each output. Minimum cable input for LOS to assert high. 100k load to ground. AC electrical characteristics are guaranteed by design and characterization. VDIN = 400mVp-p to 1100mVp-p (differential), 10k RMOD 20k, 3.2Gbps 213-1 PRBS with 100 consecutive ones and 100 consecutive zeros substituted. Note 7: Includes random jitter and deterministic jitter. Note 8: Differential cable input voltage = 700mVp-p, 3.2Gbps 213-1 PRBS with 100 consecutive ones and 100 consecutive zeros substituted. Cable loss is due to skin effect only.
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