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PDF MAX3745 Data sheet ( Hoja de datos )
| Número de pieza | MAX3745 | |
| Descripción | (MAX3744 / MAX3745) SFP Transimpedance Amplifiers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX3745 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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19-2927; Rev 1; 8/03
2.7Gbps SFP Transimpedance
Amplifiers with RSSI
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 >2mAP-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 580Ω resistor to VCC. 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
*Patent pending
Features
o Up to 2.7Gbps (NRZ) Data Rates
o RSSI Implementation in 4-Pin TO46 Header
(MAX3744)
o 10psP-P Deterministic Jitter for <100µAP-P Input
Current
o 330nARMS Input-Referred Noise at 2.1GHz
Bandwidth
o 28mA Supply Current at +3.3V
o 2GHz Small-Signal Bandwidth
o 2.0mAP-P AC Overload
o Die Size: 30 mils x 50 mils
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX3744E/D
-40°C to +85°C Dice**
MAX3745E/D
-40°C to +85°C Dice**
**Dice are guaranteed to operate from -40°C to +85°C, but are
tested only at TA = +25°C.
Typical Application Circuit
SFP OPTICAL RECEIVER
400pF
400pF
VCC
FILTER OUT+
MAX3744
IN OUT-
GND
4-PIN TO CAN
VCC
IN+ OUT+
MAX3748A
IN- OUT-
RSSI
3.3kΩ
DISABLE
LOS
0.1µF
0.1µF
DS1858/
DS1859
HOST
BOARD
VCC = 3.3V
4.7kΩ
TO
10kΩ
MOD-DEF1
MOD-DEF2
________________________________________________________________ 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.
1 page  
2.7Gbps SFP Transimpedance
Amplifiers with RSSI
Typical Operating Characteristics (continued)
(VCC = +3.3V, CIN = 0.85pF, TA = +25°C, unless otherwise noted.)
DIFFERENTIAL S22 vs. FREQUENCY
0
-5
MAX3744
-10
-15
-20 MAX3745
-25
-30
0
500 1000 1500 2000 2500 3000 3500 4000
FREQUENCY (MHz)
SUPPLY CURRENT
vs. TEMPERATURE
70
60
50
40
30
20
10
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
200
150
100
50
0
-50
-100
-150
-200
-100
DC TRANSFER FUNCTION
(VFILT = 0V)
-50 0 50
INPUT CURRENT (mAP-P)
100
RSSI
MAX3744, MAX3748A
550
TA = -40°C
500
450 TA = +85°C
400
350
300
250
200
150
0
500 1000 1500
AVERAGE INPUT CURRENT (µA)
2000
BANDWIDTH vs. TEMPERATURE
4.0
3.5
3.0
2.5
CIN = 0.6pF
2.0
1.5
1.0
0.5
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
EYE DIAGRAM
TEMPERATURE = +100°C INPUT = 20µAP-P
DATA RATE = 2.7Gbps
MAX3744 toc15
223-1 PRBS
6mV/div
60ps/div
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MAX3745.PDF ] | |
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