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PDF MAX3748 Data sheet ( Hoja de datos )
| Número de pieza | MAX3748 | |
| Descripción | Compact 155Mbps to 3.2Gbps Limiting Amplifier | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX3748 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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19-2717; Rev 1; 7/03
EVAALVUAAILTAIOBNLEKIT
Compact 155Mbps to 3.2Gbps
Limiting Amplifier
General Description
The MAX3748/MAX3748A multirate limiting amplifier func-
tions as a data quantizer for SONET, Fibre Channel, and
Gigabit Ethernet optical receivers. The amplifier accepts
a wide range of input voltages and provides constant-
level current-mode logic (CML) output voltages with con-
trolled edge speeds.
A received-signal-strength indicator (RSSI) is available
when the MAX3748/MAX3748A is combined with the
MAX3744 SFP transimpedance amplifier (TIA). A receiver
consisting of the MAX3744* and the MAX3748/
MAX3748A can provide up to 19dB RSSI dynamic range.
Additional features include a programmable loss-of-signal
(LOS) detect, an optional disable function (DISABLE),
and an output signal polarity reversal (OUTPOL). Output
disable can be used to implement squelch.
The combination of the MAX3748/MAX3748A and the
MAX3744 allows for the implementation of all the small-
form-factor SFF-8472 digital diagnostic specifications
using a standard 4-pin TO-46 header. The MAX3748/
MAX3748A is packaged in a 3mm ✕ 3mm 16-pin QFN
package with an exposed pad.
*Future product—contact factory for availability.
Applications
Gigabit Ethernet SFF/SFP Transceiver Modules
Fibre Channel SFF/SFP Transceiver Modules
Multirate OC-3 to OC-48-FEC SFF/SFP
Transceiver Modules
4-PIN TO HEADER
MAX3744 TIA*
DS1858
3-INPUT DIAGNOSTIC
MONITOR
R1
3kΩ
SFP OPTICAL RECEIVER
OUTPOL
VCC
IN+
IN-
MAX3748/
MAX3748A
RSSI TH
RTH
GND
C1
0.1µF
*FUTURE PRODUCT.
Features
o SFP Reference Design Available
o 16-Pin QFN Package with 3mm ✕ 3mm Footprint
o Single +3.3V Supply Voltage
o 86ps Rise and Fall Time
o Loss of Signal with Programmable Threshold
o RSSI Interface (with MAX3744 TIA)
o Output Disable
o Polarity Select
o 8.5psP-P Deterministic Jitter (3.2Gbps)
Ordering Information
PART
TEMP RANGE
MAX3748ETE -40°C to +85°C
MAX3748AETE -40°C to +85°C
*EP = Exposed pad.
PIN-
PACKAGE
16 QFN-EP*
16 QFN-EP*
PACKAGE
CODE
T1633-3
T1633-3
Functional Diagram and Pin Configuration appear at end of
data sheet.
Typical Operating Circuits
0.1µF
SUPPLY FILTER
CAZ1 CAZ2
HOST BOARD
HOST FILTER
VCC_RX
OUT+
OUT-
0.1µF
0.1µF
50Ω
SERDES
50Ω
DISABLE LOS
4.7kΩ TO 10kΩ
VCC_HOST
LOS
Typical Operating Circuits continued at end of data sheet.
________________________________________________________________ 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  
Compact 155Mbps to 3.2Gbps
Limiting Amplifier
Typical Operating Characteristics (continued)
(TA = +25°C and VCC = +3.3V, unless otherwise specified.)
OUTPUT EYE DIAGRAM WITH MAXIMUM INPUT
(DATA RATE OF 2.6667Gbps)
MAX3748 toc10
2.7Gbps, 223 - 1 PRBS, 1200mVP-P
OUTPUT EYE DIAGRAM AT +100°C
(MINIMUM INPUT)
MAX3748 toc11
3.2Gbps, 223 - 1 PRBS, 5mVP-P
ASSERT/DEASSERT LEVELS vs. RTH
100
DEASSERT
100mV/div
100mV/div
10
ASSERT
50ps/div
50ps/div
1
0.01
0.1 1 10
RTH (kΩ)
100
INPUT RETURN GAIN vs. FREQUENCY (SDD11)
(INPUT SIGNAL LEVEL = -40dBm)
30
OUTPUT
20 DISABLED
10
OUTPUT RETURN GAIN vs. FREQUENCY (SDD22)
(INPUT SIGNAL LEVEL = -40dBm)
30
20
10
DETERMINISTIC JITTER vs. INPUT OFFSET VOLTAGE
(2.667Gbps, K28.5)
20
18
16
14
00
-10 -10
12
10
8
-20 -20
-30 -30
6
4
2
-40
100M
1G
-40
10G 100M
1G
10G
FREQUENCY (Hz)
FREQUENCY (Hz)
0
-6 -4 -2 0 2 4
INPUT OFFSET VOLTAGE (mVP-P)
6
LOS HYSTERESIS vs. TEMPERATURE
(2.667bps, 210 - 1 PRBS)
6
RSSI CURRENT GAIN vs. INPUT TIA CURRENT
(MAX3744 AND MAX3748)
700
5 600
4
3 RTH = 20kΩ
2
RTH = 80Ω
1 RTH = 280Ω
500
400
300
200
100
0
-40-30-20-10 0 10 20 30 40 50 60 70 80 90 100
TEMPERATURE (°C)
0
0 100 200 300 400 500 600 700 800 900 1000
INPUT TIA CURRENT (µA)
_______________________________________________________________________________________ 5
5 Page 
Compact 155Mbps to 3.2Gbps
Limiting Amplifier
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
CL - A -
D
D/2
E/2
E
-B-
CL
D2/2
D2
b 0.10 M C A B
(NE - 1) X e
e
E2/2
E2
L
k
(ND - 1) X e
0.10 C
0.08 C
A
A2
A1
CL
L
e
CL
e
L
PROPRIETARY INFORMATION
TITLE: PACKAGE OUTLINE
12 & 16L, QFN THIN, 3x3x0.8 mm
APPROVAL
DOCUMENT CONTROL NO.
21-0136
REV.
C
1
2
EXPOSED PAD VARIATIONS
NOTES:
1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
3. N IS THE TOTAL NUMBER OF TERMINALS.
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO
JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED
WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR
MARKED FEATURE.
5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm
FROM TERMINAL TIP.
6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
9. DRAWING CONFORMS TO JEDEC MO220 REVISION C.
PROPRIETARY INFORMATION
TITLE: PACKAGE OUTLINE
12 & 16L, QFN THIN, 3x3x0.8 mm
APPROVAL
DOCUMENT CONTROL NO.
21-0136
REV.
C
2
2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11
© 2003 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MAX3748.PDF ] | |
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