MAX3861ETG+ Maxim Integrated Products, MAX3861ETG+ Datasheet - Page 8

• Manufacturer Part Number: MAX3861ETG+
• Description: IC AMP POST W/AGC 24-TQFN-EP
• Manufacturer: Maxim Integrated Products
• Type: Postamplifierr

Specifications of MAX3861ETG+

• Applications: Optical Networks
• Mounting Type: Surface Mount
• Package / Case: 24-TQFN Exposed Pad
• Operating Supply Voltage: 3.3 V
• Supply Current: 94 mA
• Operating Temperature Range: + 150 C
• Mounting Style: SMD/SMT
• Number Of Channels: 1
• Power Dissipation: 1350 mW
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

When AC-coupling is desired, select coupling capaci-
tors C
istic jitter. Jitter is decreased as the input low-frequency
cutoff (f
For ATM/SONET or other applications using scrambled
NRZ data, select (C
f
other applications using 8B/10B data coding, select
(C
The capacitor between CD+ and CD- determines the
time constant of the input signal detection DC offset-
cancellation loop. A value of 0.1µF for C
low-frequency cutoff (f
frequency is desired, 0.22µF gives f
0.47µF gives f
tion, do not use a capacitor of less than 0.01µF.
2.7Gbps Post Amp with Automatic Gain Control
8
Figure 2. Input Interface
IN
Setting the Offset-Cancellation Loop Time
IN+
IN
IN-
< 32kHz. For Fibre Channel, Gigabit Ethernet, and
_______________________________________________________________________________________
, C
IN
OUT
IN
and C
) is decreased.
Constant for Input Signal Detection
) ≥ 0.01µF, which provides f
C
OUT
Select the Coupling Capacitors
50Ω
= 2.1kHz. To guarantee stable opera-
f
IN
to minimize the receiver’s determin-
IN
=
, C
C
Circuitry (Selecting C
) below 10kHz. If a lower cutoff
V
[
CC
2 50
OUT
π
( )( )
) ≥ 0.1µF, which provides
1
C
IN
50Ω
]
IN
C
= 4.5kHz and
< 320kHz.
CD
provides a
CD
)
The capacitor between CZ+ and CZ- determines the
time constant of the signal path DC offset-cancellation
loop. To maintain stability, keep a one-decade separa-
tion between f
associated with the DC offset-cancellation circuit. For
SONET applications, f
Therefore, C
0.47µF (f
To guarantee stable operation, do not use a capacitor
of less than 0.01µF.
The automatic gain-control loop time constant is deter-
mined by the external capacitor connected between CG+
and CG-. Maxim recommends a value of at least
0.0022µF.
Output amplitude can be programmed from 400mV
to 920mV
the Output Signal Amplitude vs. SC Pin Voltage graph
in the Typical Operating Characteristics.
Figure 3. Output Interface
Setting the Offset-Cancellation Loop Time
Setting the Automatic Gain-Control Loop
OC
P-P
Programming the Output Amplitude
Constant for the Main Signal Path
= 1.4kHz), or a greater value can be used.
by applying a voltage to the SC pin. See
CZ
IN
Time Constant (Selecting C
= 0.22µF (f
and the low-frequency cutoff (f
50Ω
IN
(Programming the SC Pin)
< 32kHz, so f
V
CC
50Ω
OC
= 2.99kHz), C
(Selecting C
OCMAX
< 3.2kHz.
CZ
OUT+
OUT-
CG
CZ
OC
P-P
=
)
)
)