Datasheet

MAX3969
200Mbps SFP Limiting Amplifier
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
Power-Supply Voltage Range (V
CC
, V
CCO
) ..........-0.5V to +7.0V
Voltage at FILTER, RSSI, IN+, IN-, CZP, CZN, SQUELCH,
INV, V
TH
..................................................-0.5V to (V
CC
+ 0.5V)
TTL Output Current (LOS,
LOS) .........................................±9mA
PECL Output Current (OUT+, OUT-, SD) .........................±50mA
Differential Voltage Between CZP and CZN..........-1.5V to +1.5V
Differential Voltage Between IN+ and IN- .............-1.5V to +1.5V
Continuous Power Dissipation (T
A
= +85°C)
20-Pin Thin QFN (derate 16.9mW/°C above +85°C) ....1099mW
Operating Junction Temperature Range (die).....-40°C to +150°C
Die Attach Temperature...................................................+400°C
Storage Temperature Range .............................-50°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.97V to +5.5V, PECL outputs terminated with 50Ω to V
CC
- 2V, R1 = 100kΩ, T
A
= -40°C to +85°C, unless otherwise noted.
Typical values are at V
CC
= +3.3V, T
A
= +25°C.) (Note 1)
PARAMETER CONDITIONS
MIN
TYP
MAX
UNITS
Supply Current PECL outputs open 22 45 mA
LOS Hysteresis Input = 4.0mV
P-P
(Note 2) 3.0 5 8.0 dB
Squelch Input Current 27 100 µA
PECL Output-Voltage High (Note 3)
-1085 -880
mV
PECL Output-Voltage Low (Note 3)
-1830 -1550
mV
Input = 7mV
P-P
or 90mV
P-P
, 0°C to +85°C
-3.0 +3.0
dB
LOS Assert Accuracy
Input = 7mV
P-P
or 90mV
P-P
, -40°C to +85°C -3.6 +3.6
dB
Minimum LOS Assert Input 2.7
mV
P-P
Maximum LOS Deassert Input
143
mV
P-P
Input Sensitivity (Note 4) 1 4
mV
P-P
Input Overload (Note 4)
1500
mV
P-P
TTL Output High R
LOS
= 4.7kΩ to 10kΩ 2.4 3.0 V
TTL Output Leakage (Note 5) 1 20 µA
TTL Output Low I
OL
= 800µA 0.2 0.5 V
Data Output Transition Time 20% to 80%, Input > 4mV
P-P
(Note 4)
0.35
0.8
1.20
ns
Pulse-Width Distortion Input > 4mV
P-P
(Notes 4, 6) 50 250 ps
LOS, SD Assert/Deassert Time C
FILTER
= 0.01µF 10 µs
Note 1: Dice are tested and guaranteed only at T
A
= +25°C.
Note 2: LOS hysteresis = 20log(V
LOS-DEASSERT
/ V
LOS-ASSERT
).
Note 3: Relative to supply voltage (V
CCO
).
Note 4: AC characteristics are guaranteed by design and characterization.
Note 5: Input < LOS threshold (LOS = HIGH), V
LOS
= 2.4V.
Note 6: Pulse-width distortion = [(width of wider pulse) - (width of narrower pulse)] / 2, measured with 100Mbps 1-0 pattern.