Datasheet

MAX3964A/MAX3968
+3.0V to +5.5V, 125Mbps to 266Mbps
Limiting Amplifiers with Loss-of-Signal Detector
_______________________________________________________________________________________ 3
Note 1: Dice are tested and guaranteed at T
A
= +25°C only.
Note 2: LOS hysteresis = 20log(V
LOS-DEASSERT
/ V
LOS-ASSERT
).
Note 3: Voltage measurements are relative to supply voltage (V
CC
).
Note 4: PWD = [(width of wider pulse) - (width of narrower pulse)] / 2, measured with 100Mbps 1-0 pattern.
ELECTRICAL CHARACTERISTICS—MAX3964AETP
(V
CC
= +3.0V to +5.5V, PECL outputs terminated with 50Ω to (V
CC
- 2V), T
A
= -40°C to +85°C. Typical values measured at V
CC
=
+3.3V and T
A
= +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Current I
CC
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)
-1.085 -0.880
V
PECL Output Voltage Low (Note 3)
-1.830 -1.550
V
Input = 7mV
P-P
or 90mV
P-P
, 0°C to +85°C -3 +3
LOS Assert Accuracy
Input = 7mV
P-P
or 90mV
P-P
, -40°C to 0°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 24
mV
P-P
Input Overload 1.5 V
P-P
Output Transition Time t
r
, t
f
20% to 80% 1.6 2.4 ns
Pulse-Width Distortion (Note 4) 50
250
ps
P-P
Typical Operating Characteristics
(MAX3964A EV kit, V
CC
= +3.3V, decibels (dB) calculated as 20 log ∆V, PECL outputs terminated with 50Ω to (V
CC
- 2V), T
A
= +25°C,
unless otherwise noted.)
1.00
1 100 1k10
RSSI VOLTAGE vs. INPUT AMPLITUDE
2.00
3.00
1.50
2.50
MAX3964/65toc01
INPUT AMPLITUDE (mV)
V
RSSI
(V)
INPUT PATTERN IS 2
23 -
1 PRBS
LOS DEASSERTED
LOS ASSERTED
1.5
1.6
1.7
1.9
1.8
2.0
2.2
2.1
2.3
-40 0 20-20 40 60 80 100
RSSI VOLTAGE vs. TEMPERATURE
MAX3964/65toc02
TEMPERATURE (°C)
V
RSSI
(V)
INPUT = 100mV
INPUT = 10mV
INPUT = 5mV
100
30
1 100 1k10 10k
PULSE-WIDTH DISTORTION
vs. INPUT AMPLITUDE
40
50
60
MAX3964/65toc03
INPUT AMPLITUDE (mV
P-P
)
PWD (ps)
70
80
90