MAX3665EUA+T Maxim Integrated Products, MAX3665EUA+T Datasheet - Page 4

• Manufacturer Part Number: MAX3665EUA+T
• Description: IC PREAMP 622MBPS TRANS 8-UMAX
• Manufacturer: Maxim Integrated Products
• Type: Transimpedance Preamplifierr

Specifications of MAX3665EUA+T

• Applications: Optical Networks
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

________________Detailed Description
The MAX3665 is a transimpedance amplifier designed
for 622Mbps SDH/SONET applications. It comprises a
transimpedance amplifier, a paraphase amplifier with
CML differential outputs, and a DC cancellation loop.
Figure 1 shows a functional diagram of the MAX3665.
The signal current at IN flows into the summing node of a
high-gain amplifier. Shunt feedback through R
this current to a voltage. Diodes D1 and D2 clamp the
output voltage for large input currents.
622Mbps, Ultra-Low-Power, 3.3V
Transimpedance Preamplifier for SDH/SONET
_____________________Pin Description
_____________________________Typical Operating Characteristics (continued)
(V
4
CC
PIN
5, 8
_______________________________________________________________________________________
1
2
3
4
6
7
400
350
300
250
200
150
= +3.3V, includes off-chip filter, see Figure 3b, T
-40
vs. TEMPERATURE (INPUT = 450 A
DIFFERENTIAL OUTPUT AMPLITUDE
NAME
-20
OUT+
OUT-
GND
N.C.
FILT
V
IN
CC
AMBIENT TEMPERATURE ( C)
0
V
CC
20
= 5.0V
+3.3V or +5.0V Supply Voltage
Signal Input (From Photodiode)
No Connection. Not internally con-
nected.
On-Chip Resistor for Filtering
Photodiode Supply Voltage
Ground
Noninverting Voltage Output. Current
flowing into IN causes V
increase.
Inverting Voltage Output. Current flow-
ing into IN causes V
Transimpedance Amplifier
40
V
CC
= 3.3V
60
80
FUNCTION
P-P
100
)
OUT-
OUT+
to decrease.
F
to
A
converts
= +25°C, unless otherwise noted.)
(INPUT = 10 A
EYE DIAGRAM
200ps/div
INPUT: 2
CONTAINS 100 ZEROS
IN
Figure 1. Functional Diagram
Q4
P-P
13
)
- 1 PRBS
V
V
CC
CC
Q1
Q5
CANCELLATION
R
D2
D1
F
AMP
DC
R7
REFERENCE AMP
PARAPHASE
GND
AMP
R4
(INPUT = 450 A
V
CC
EYE DIAGRAM
200ps/div
50
R6
R2
R3
MAX3665
INPUT: 2
CONTAINS 100 ZEROS
V
CC
Q3
1.5k
50
R5
R1
P-P
13
V
CC
Q2
)
- 1 PRBS
OUT+
OUT-
FILT