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MAX3275U

Description
Low-Noise, Fibre Channel Transimpedance Amplifiers
File Size1MB,9 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX3275U Overview

Low-Noise, Fibre Channel Transimpedance Amplifiers

19-2207; Rev 1; 3/05
Low-Noise, Fibre Channel Transimpedance
Amplifiers
General Description
The MAX3275/MAX3277 transimpedance amplifiers
provide a compact low-power solution for communica-
tion up to 2.125Gbps. They feature 300nA input-
referred noise at 2.1GHz bandwidth (BW) with 0.85pF
input capacitance. The parts also have 2mA
P-P
AC
input overload.
The MAX3277 is identical to the MAX3275, but with the
output polarities inverted for optimum packaging flexi-
bility. Both parts operate from a single 3.3V supply and
consume only 83mW. The MAX3275/MAX3277 are
compact 24mil x 47mil die and require no external com-
pensation capacitor. A space-saving filter connection is
provided for positive bias to the photodiode through an
on-chip 600Ω resistor to V
CC
. These features allow
easy assembly into a TO-46 or TO-56 header with a
photodiode.
The MAX3275/MAX3277 and MAX3274 limiting ampli-
fiers provide a two-chip solution for dual-rate, fibre
channel receiver applications.
o
Up to 2.125Gbps (NRZ) Data Rates
o
7ps
P-P
Deterministic Jitter for <100µA
P-P
Input Current
o
300nA
RMS
Input-Referred Noise at 2.1GHz
Bandwidth
o
25mA Supply Current at +3.3V
o
2.3GHz Small-Signal Bandwidth
o
2.0mA
P-P
AC Overload
o
Die Size: 24mil x 47mil
Features
MAX3275/MAX3277
Ordering Information
PART
MAX3275U/D
MAX3277U/D
TEMP RANGE
0°C to +85°C
0°C to +85°C
PIN-PACKAGE
Dice*
Dice*
Applications
Dual-Rate Fibre Channel Optical Receivers
Gigabit Ethernet Optical Receivers
*Dice
are guaranteed to operate from 0°C to +85°C, but are test-
ed only at T
A
= +25°C.
Typical Application Circuit
SMALL FORM FACTOR
OPTICAL RECEIVER
+3.3V
+3.3V
4.7kΩ
TO
10kΩ
HOST SERVER
OR SWITCH
400pF
600Ω
C
FILTER
400pF
IN
V
CC
MAX3275
OUT+
TIA
OUT-
0.1µF
GND
660Ω
TH SQUELCH
IN-
0.1µF
IN+
100Ω
MAX3274
LOS LOS
0.1µF
OUT+
LIMITING
AMP
OUT-
0.1µF
BWSEL
RATE SELECT
DESERIALIZER
100Ω
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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