MAX3948 Просмотр технического описания (PDF) - Maxim Integrated
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MAX3948 Datasheet PDF : 37 Pages
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MAX3948
11.3Gbps, Low-Power, DC-Coupled Laser Driver
ELECTRICAL CHARACTERISTICS (continued)
(VCC = VCCT = 2.95V to 3.63V, TA = -40NC to +95NC; typical values are at VCC = VCCT = 3.3V, TA = +25NC, LDDC = 20mA, LDMOD
= 40mA, and 14I single-ended electrical output load, unless otherwise noted. See Figure 1 for electrical setup.) (Note 2)
PARAMETER
Modulation Output Termination
Modulation Current DAC Stability
Modulation Current Rise/Fall
Time
SYMBOL
ROUT
tR, tF
CONDITIONS
10mA P LDMOD P 85mA,
VVOUT = VCCT - 1.5V (Notes 6, 7)
20% to 80%, 10mA P LDMOD P 85mA
(Note 6)
MIN TYP
19
25
1.5
26
10mA P LDMOD P 85mA, 8.5Gbps with
K28.5 pattern
4
Deterministic Jitter (Note 6)
DJ
10mA P LDMOD P 85mA, 10.3125Gbps
(Note 9)
6
10mA P LDMOD P 85mA, 11.3Gbps
(Note 9)
8
Random Jitter
RJ
10mA P LDMOD P 85mA (Note 6)
0.19
0.1GHz P f P 4.1GHz, ZCM_SOURCE =
12.5W
-10
SCC22
Differential S-Parameters
(Note 4)
4.1GHz < f P 11.3GHz, ZCM_SOURCE =
12.5W
-6
SDD22
0.1GHz< f P 11.3GHz, ZDIFF_SOURCE =
50W
-13
SAFETY FEATURES
Fault never occurs for VVOUT R VCCT - 2V,
fault always occurs for VVOUT < VCCT -
2.8V, referenced to VCCT
VCCT -
2.8
Threshold Voltage at VOUT
Fault never occurs for VVOUT R 1.7V, fault
always occurs for VVOUT < 1.35V,
referenced to GND,
1.35
SET_IMOD[8:6] = 111b
MAX
31
UNITS
I
4
%
36
ps
12
psP-P
13
0.55
psRMS
dB
VCCT
-2
1.7
V
Threshold Voltage at TOUTC
Threshold Voltage at TOUTA
Threshold Voltage at VCCT
Fault never occurs for VVOUT R 0.57V, fault
always occurs for VVOUT < 0.43V,
referenced to GND,
0.43
SET_IMOD[8:6] = 000b
Fault never occurs for VTOUTC R 0.48V,
fault always occurs for VTOUTC < 0.35V
Fault never occurs for VTOUTA R VCCT -
1.45V, fault always occurs for VTOUTA <
VCCT - 1.88V
Fault never occurs for VCCT R VCC - 0.15V,
fault always occurs for VCCT < VCC - 0.4V
0.35
VCCT -
1.88
VCC -
0.4
0.57
0.48
V
VCCT -
1.45
V
VCC -
0.15
V
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