MAX3971AUTP+ Maxim Integrated Products, MAX3971AUTP+ Datasheet - Page 6

• Manufacturer Part Number: MAX3971AUTP+
• Description: IC AMP LIMIT 10.7GBPS 20-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Limiting Amplifierr

Specifications of MAX3971AUTP+

• Applications: Optical Networks
• Mounting Type: Surface Mount
• Package / Case: 20-TQFN Exposed Pad
• Operating Supply Voltage: 3.3 V
• Supply Current: 50 mA
• Operating Temperature Range: + 85 C
• Mounting Style: SMD/SMT
• Number Of Channels: 1
• Power Dissipation: 1300 mW
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

An equivalent circuit for the output network is shown in
Figure 3. It consists of a pair of 50Ω resistors connect-
ed to V
tial transistor pair (Q1 and Q2). The differential output
signals are clamped by transistors Q3 and Q4 when
the DISABLE input is high.
A logic signal can be applied to the DISABLE pin to
squelch the output signal. When the output is disabled,
an offset is added to the output, preventing the follow-
ing stage from oscillating, if DC-coupled. See Figure 4
for the input stage of the DISABLE function.
+3.3V, 10.7Gbps Limiting Amplifier
Figure 3. CML Output Equivalent Circuit
Figure 2. CML Input Equivalent Circuit
6
DISABLE
_______________________________________________________________________________________
DATA
STRUCTURES
CC
GNDIN+
GNDIN-
IN+
IN-
ESD
Q3
driven by the collectors of an output differen-
Q4
Q1
50Ω
V
CC3
50Ω
V
CC1
CML Output Circuit
DISABLE Function
Q2
50Ω
50Ω
STRUCTURES
ESD
OUT+
OUT-
Figure 4. TTL Input Stage
Figure 5. Power-Supply Filter
DISABLE
100kΩ
0.001μF
V
CC1
20μA
L
0.001μF
+3.3V
MAX3971A
+3.3V
V
CC2
SUPPLY FILTER
0.001μF
V
CC3