Rainbow Electronics MAX3745 - Manual

General Description
The MAX3744/MAX3745 transimpedance amplifiers pro-
vide a compact, low-power solution for communication
up to 2.7Gbps. They feature 330nA input-referred noise
at 2.1GHz bandwidth (BW) with 0.85pF input capaci-
tance. The parts also have >2mA
P-P AC input overload.
Both parts operate from a single +3.3V supply and con-
sume 93mW. The MAX3744/MAX3745 are in a compact
30-mil x 50-mil die and require no external compensa-
tion capacitor. A space-saving filter connection is pro-
vided for positive bias to the photodiode through an
on-chip 580
Ω resistor to V
CC . These features allow
easy assembly into a low-cost TO-46 or TO-56 header
with a photodiode.
The MAX3744 and MAX3748A receiver chip set pro-
vides an RSSI output using a Maxim-proprietary* inter-
face technique. The MAX3744 preamplifier, MAX3748A
postamplifier, and DS1858/DS1859 SFP controller meet
all the SFF-8472 digital diagnostic requirements.
Applications
Up to 2.7Gbps SFF/SFP Optical Receivers
Optimized for Small-Form-Factor Pluggable (SFP)
Optical Receivers
Features
♦ Up to 2.7Gbps (NRZ) Data Rates
♦ RSSI Implementation in 4-Pin TO46 Header
(MAX3744)
♦ 10ps
P-P
Deterministic Jitter for <100µA
P-P
Input
Current
♦ 330nA
RMS Input-Referred Noise at 2.1GHz
Bandwidth
♦ 28mA Supply Current at +3.3V
♦ 2GHz Small-Signal Bandwidth
♦ 2.0mA
P-P AC Overload
♦ Die Size: 30 mils x 50 mils
MAX3744/MAX3745
2.7Gbps SFP Transimpedance
Amplifiers with RSSI
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
V CC
FILTER
4-PIN TO CAN
400pF
400pF
IN
OUT+
OUT-
GND
OUT+
0.1
µ
F
0.1
µ
F
3.3k
Ω
IN+
V CC
IN-
RSSI DISABLE LOS
OUT-
MAX3748A
SFP OPTICAL RECEIVER HOST
BOARD
MOD-DEF1
MOD-DEF2
4.7k Ω
TO
10k
Ω
V CC
MAX3744
DS1858/
DS1859
3.3V
Typical Application Circuit
19-2927; Rev 0; 7/03
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.
**Dice are guaranteed to operate from -40°C to +85°C, but are
tested only at T
A = +25°C.
PART TEMP RANGE PIN-PACKAGE
MAX3744E/D -40 °C to +85°C Dice**
MAX3745E/D -40 °C to +85°C Dice**
*Patent pending