
M
+3.3V, 2.5Gbps Low-Power 
Limiting Amplifiers
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.3V and T
A
= +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
73
MAX
124.7
UNITS
mV
P-P
V
V
μA
High LOS Deassert Level
LOS Output High Voltage
LOS Output Low Voltage
Squelch Input Current
R
TH
 = 80
 (Notes 3, 10)
Sinking 30μA
Sourcing 1.2mA
2.4
0.4
400
Note 1:
Note 2:
Dice are designed and guaranteed from -40°C to +85°C but are tested only at T
A
= +25°C.
Supply current measurement excludes the current of the CML output stage (16mA typical). See Figure 1, 
Power-Supply 
Current Measurement
.
Guaranteed by design and characterization.
Input edge speed is controlled using 4-pole, lowpass Bessel filters with bandwidth approximately 75% of the maximum 
data rate.
Deterministic jitter is measured with a K28.5 pattern (0011 1110 1011 0000 0101). Deterministic jitter is the peak-to-peak 
deviation from ideal time crossings, measured at the zero-level crossings of the differential output per ANSI X3.230, Annex A.
Random jitter is measured with the minimum input signal. For Fibre Channel and Gigabit Ethernet applications, the peak-
to-peak random jitter is 14.1 times the RMS random jitter.
Power-supply noise rejection (PSNR) is calculated by the equation PSNR = 20log (
V
CC
/(
V
OUT
)), where 
V
OUT
is the 
change in differential output voltage due to the power-supply noise, 
V
CC
. See Power-Supply Noise Rejection vs. 
Frequency in the 
Typical Operating Characteristics
.
Hysteresis is defined as: 20 
 log(V
LOS-DEASSERT
/V
LOS-ASSERT
).
Response time to a 10dB change in input power. For the specification guaranteed, the power is assumed to switch back 
and forth between two levels (separated by 10dB and equidistant from assert and deassert levels) outside of the two 
hysteresis thresholds.
Note 10:
 All power-detect AC parameters are guaranteed with a 2
23
- 1 PRBS, 2.5Gbps input, with the longest possible run of 80CID.
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Typical Operating Characteristics
(V
CC
= +3.3V, T
A 
= +25°C, unless otherwise noted.)
600
650
700
750
800
850
900
950
1000
0
10
20
V
IN
 (mV
P-P
)
30
40
50
OUTPUT AMPLITUDE
vs. INPUT AMPLITUDE
M
V
O
P
)
LEVEL = GND
LEVEL = OPEN
20
35
30
25
40
45
50
55
60
65
70
-40
10
-15
AMBIENT TEMPERATURE (
°
C)
35
60
85
SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
M
S
0
6
4
2
8
10
12
14
16
18
20
1
10
INPUT AMPLITUDE (mV
P-P
)
100
1000
10,000
DETERMINISTIC JITTER
vs. INPUT AMPLITUDE
M
D
P
)