MAX3748 Maxim, MAX3748 Datasheet - Page 3

• Manufacturer Part Number: MAX3748
• Description: Compact 155Mbps to 3.2Gbps Limiting Amplifier
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
+25°C, V
0.75
Note 1: Between sensitivity and overload, all AC specifications are met.
Note 2: Guaranteed by design and characterization.
Note 3: The deterministic jitter caused by this filter is not included in the DJ generation specifications (input).
Note 4: 2
Note 5: Random jitter was measured without using a filter at the input.
Note 6: The supply current measurement excludes the CML output currents by connecting the CML outputs to a separate V
Note 7: Unless otherwise specified, the pattern for all LOS detect specifications is 2
Note 8: The signal at the input is switched between two amplitudes, Signal_ON and Signal_OFF, as shown in Figure 2.
Note 9: I
Note 10: Stability is defined as variation over temperature and power supply with respect to the typical gain of the part.
Medium LOS Deassert Level
High LOS Assert Level
High LOS Deassert Level
LOSS OF SIGNAL at 155Mbps (Note 7)
LOS Hysteresis
LOS Assert/Deassert Time
Low LOS Assert Level
Low LOS Deassert Level
Medium LOS Assert Level
Medium LOS Deassert Level
High LOS Assert Level
High LOS Deassert Level
RSSI
RSSI Current Gain (Note 9)
Input-Referred RSSI Current
Stability
TTL/CMOS I/O
LOS Output High Voltage
LOS Output Low Voltage
LOS Output Current
DISABLE Input High
DISABLE Input Low
DISABLE Input Current
CC
✕
= 2.97V to 3.63V, ambient temperature = -40°C to +85°C, CML output load is 50Ω to V
2.667GHz for all data rates of 2.667Gbps and below, and with f
CC
low-speed portion of the DJ (baseline wander) was obtained by measuring the eye width difference between outputs gen-
erated using K28.5 and 2
(see Figure 1).
CM_INPUT
PARAMETER
23
= 3.3V, unless otherwise specified. The data input transition time is controlled by a 4th-order Bessel filter with f
- 1 PRBS pattern was substituted by K28.5 pattern to determine the high-speed portion of the deterministic jitter. The
is the input common mode. I
_______________________________________________________________________________________
23
SYMBOL
- 1 PRBS patterns.
A
V
V
V
V
RSSI
OH
OL
IH
IL
RSSI
R
R
R
10log ( V
(Note 8)
R
R
R
R
R
R
A
I
(Note 10)
R
R
R
IC is powered down
R
Compact 155Mbps to 3.2Gbps
RSSI
TH
TH
TH
TH
TH
TH
TH
TH
TH
RSSI
LOS
LOS
LOS
LOS
= 280Ω
= 80Ω
= 80Ω
= 20kΩ
= 20kΩ
= 280Ω
= 280Ω
= 80Ω
= 80Ω
is the current at the RSSI output.
/A
= 4.7kΩ to10kΩ to V
= 4.7kΩ to10kΩ to V
= 4.7kΩ to10kΩ to V
= 4.7kΩ to 10kΩ to V
= I
RSSI
D E A S S E R T
RSSI
/I
CM_RSSI
CONDITIONS
/V
A S S E R T
-3dB
I
I
CM_INPUT
CM_INPUT
= 0.75
CC_host
CC_host
CC_host
)
CC_host
✕
< 6.6mA
> 6.6mA
3.2GHz for data rate of 3.2Gbps.)
(3V)
(3.6V)
(3.3V);
Limiting Amplifier
23
- 1 PRBS.
CC
, C
22.8
MIN
-31
-73
2.4
2.0
AZ
= 0.1µF, typical values are at
13.3
21.2
33.3
55.5
0.03
TYP
38.3
65.2
2.1
3.5
5.6
20
25
MAX
38.6
99.3
+33
+90
0.4
0.8
40
10
UNITS
mV
mV
mV
mV
mV
mV
mV
mV
mV
CC
-3dB
dB
µA
µA
µA
µs
V
V
V
V
P-P
P-P
P-P
P-P
P-P
P-P
P-P
P-P
P-P
=
3