MAX3785 データシートの表示（PDF） - Maxim Integrated
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MAX3785 Datasheet PDF : 8 Pages
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6.25Gbps, 1.8V PC Board Equalizer
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC to GND.................................-0.5V to +6.0V
Continuous Output Current (OUT+, OUT-) .......-25mA to +25mA
Input Voltage (IN+, IN-) ..............................-0.5V to (VCC + 0.5V)
Operating Ambient Temperature Range
(UBL, UTB)......................................................... 0°C to +85°C
Operating Ambient Temperature Range (ITT).....-20°C to +85°C
Storage Ambient Temperature Range...............-55°C to +150°C
Continuous Power Dissipation (TA = +70°C)
6-Pin TDFN (derate 24.4mW above +70°C)..................1.95W
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.
ELECTRICAL CHARACTERISTICS
(Typical values measured at VCC = 1.8V and TA= +25°C. Specifications guaranteed over specified operating conditions.)
(See Operating Conditions table.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Supply Current
35
55
mA
Input Swing (IN)
Measured differentially at data source before
encountering loss (Point A in Figure 1) (Note 1)
400
1600 mVP-P
Input Common-Mode Voltage Range (Note 1)
Input Return Loss
Differential Input Resistance
Output Swing
Output Resistance
Output Return Loss
Output Transition Time (tr, tf)
100MHz to 3.2GHz, power off
IN+ and IN-
Measured differentially at OUT+ and OUT- with 50
±1% load at each side
OUT+ or OUT-
100MHz to 3.2GHz, IN+ = high
20% to 80% (Note 2)
2.5Gbps, 3.2Gbps, 5.0Gbps; 0in to 30in FR-4
400mVP-P IN 1600mVP-P
VCC -
(INMAX/4)
VCC -
(INMIN/4)
15
85
100
115
450
800
42
50
58
14
30
40
55
0.10 0.15
V
dB
mVP-P
dB
ps
Residual Deterministic Jitter
(Notes 1, 3, 4)
2.5Gbps, 3.2Gbps; 40in FR-4
400mVP-P IN 1600mVP-P
6.25Gbps; 0in to 30in FR-4
600mVP-P IN 1600mVP-P
0.15 0.20
UI
0.15 0.25
Output Random Jitter
Low-Frequency Cutoff Frequency
Latency
Maximum Bit Rate
Minimum Bit Rate
6.25Gbps; 0in to 30in FR-4
IN = 400mVP-P
(Notes 1, 2)
(Note 1)
(Note 1)
0.20 0.30
0.75
50
200
6.25 6.4
1.0
1.0 psRMS
kHz
ps
Gbps
2.5 Gbps
Note 1: Guaranteed by design and characterization.
Note 2: Using input pattern 0000011111 at 6.25Gbps.
Note 3: Difference in deterministic jitter between data source and equalizer output, evaluated at 2.5Gbps, 3.2Gbps, 5Gbps, and
6.25Gbps. Pattern used: PRBS (27), ninety-six 0s, 1, 0, 1, 0, PRBS (27), ninety-six 1s, 0, 1, 0, 1.
Note 4: Signal is applied differentially at input to a 6-mil wide, loosely coupled stripline. Deterministic jitter at the output of the
transmission line is from media-induced loss, not from clock source modulation (see Figure 1).
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