MAX3748HETE#G16 Maxim Integrated Products, MAX3748HETE#G16 Datasheet

IC AMP LIMITING 16-TQFN-EP

MAX3748HETE#G16

Manufacturer Part Number
MAX3748HETE#G16
Description
IC AMP LIMITING 16-TQFN-EP
Manufacturer
Maxim Integrated Products
Type
Limiting Amplifierr
Datasheet

Specifications of MAX3748HETE#G16

Applications
Optical Networks
Mounting Type
Surface Mount
Package / Case
16-TQFN Exposed Pad
Amplifier Type
Limiting
Supply Voltage Range
2.97V To 3.63V
Amplifier Case Style
TQFN
No. Of Pins
16
Operating Temperature Range
-40°C To +85°C
Filter Terminals
SMD
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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0
The MAX3748/MAX3748A multirate limiting amplifiers
function 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 volt-
ages with controlled edge speeds.
A received-signal-strength indicator (RSSI) is available
when the MAX3748/MAX3748A are 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 (OUT-
POL). 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 are packaged in a 3mm x 3mm, 16-pin thin
QFN package with an exposed pad.
19-2717; Rev 5; 11/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Typical Operating Circuits continued at end of data sheet.
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
________________________________________________________________ Maxim Integrated Products
3-INPUT DIAGNOSTIC
MONITOR
DS1858
General Description
MAX3744 TIA
3kΩ
R1
Applications
C1
0.1μF
IN+
IN-
Compact 155Mbps to 4.25Gbps
RSSI
SFP OPTICAL RECEIVER
OUTPOL
MAX3748A
MAX3748
TH
R
TH
GND
V
CC
♦ SFP Reference Design Available
♦ 16-Pin TQFN Package with 3mm
♦ Single +3.3V Supply Voltage
♦ 86ps Rise and Fall Time
♦ Loss of Signal with Programmable Threshold
♦ RSSI Interface (with MAX3744 TIA)
♦ Output Disable
♦ Polarity Select
♦ 8.7ps
H = hybrid lead-free package. *See Detailed Description for
more information. The MAX3748H is the MAX3748A in a hybrid
lead-free package.
# Denotes a RoHS-compliant device that may include lead that
is exempt under the RoHS requirements.
** EP = Exposed pad.
Functional Diagram and Pin Configuration appear at end of
data sheet.
MAX3748HETE#G16*
MAX3748ETE
MAX3748AETE
CAZ1 CAZ2
DISABLE
0.1μF
PART
P-P
LOS
OUT+
OUT-
Deterministic Jitter (4.25Gbps)
Limiting Amplifier
SUPPLY FILTER
Typical Operating Circuits
0.1μF
0.1μF
Ordering Information
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
4.7kΩ TO 10kΩ
50Ω
50Ω
HOST BOARD
HOST FILTER
V
V
LOS
CC
CC
SERDES
_RX
_HOST
3mm Footprint
PIN-PACKAGE
16 TQFN-EP**
16 TQFN-EP**
16 TQFN-EP**
Features
1

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MAX3748HETE#G16 Summary of contents

Page 1

... Output Disable ♦ Polarity Select ♦ 8.7ps Deterministic Jitter (4.25Gbps) P-P PART MAX3748HETE#G16* MAX3748ETE MAX3748AETE H = hybrid lead-free package. *See Detailed Description for more information. The MAX3748H is the MAX3748A in a hybrid lead-free package. # Denotes a RoHS-compliant device that may include lead that is exempt under the RoHS requirements ...

Page 2

Compact 155Mbps to 4.25Gbps Limiting Amplifier ABSOLUTE MAXIMUM RATINGS Power-Supply Voltage (V ) .................................-0.5V to +6.0V CC Voltage at IN+, IN- ..........................(V CC Voltage at DISABLE, OUTPOL, RSSI, CAZ1, CAZ2, LOS, TH............................-0. Current into LOS ...................................................-1mA to +9mA ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 2.97V to 3.63V, ambient temperature = -40°C to +85°C, CML output load is 50Ω +25° 3.3V, unless otherwise specified. The data input transition time is controlled by a 4th-order Bessel ...

Page 4

Compact 155Mbps to 4.25Gbps Limiting Amplifier (T = +25°C and V = +3.3V, unless otherwise specified SUPPLY CURRENT vs. TEMPERATURE 100 -40 -30-20 - ...

Page 5

V = +3.3V, unless otherwise specified OUTPUT EYE DIAGRAM WITH MAXIMUM INPUT (DATA RATE OF 2.6667Gbps) MAX3748 toc10 23 2.7Gbps PRBS, 1200mV P-P 100mV/div 50ps/div INPUT RETURN GAIN vs. FREQUENCY (SDD11) ...

Page 6

Compact 155Mbps to 4.25Gbps Limiting Amplifier PIN NAME Supply Voltage CC 2 IN+ Noninverted Input Signal, CML 3 IN- Inverted Input Signal, CML Loss-of-Signal Threshold Pin. Resistor to ground ( disables the LOS ...

Page 7

(SUPPLY CURRENT) CC 50Ω 50Ω MAX3748 MAX3748A R TH Figure 1. Power-Supply Current Measurement Detailed Description The limiting amplifier consists of an input buffer, a multi- stage amplifier, offset correction circuitry, an output buffer, power-detection circuitry, and ...

Page 8

Compact 155Mbps to 4.25Gbps Limiting Amplifier CML Output Buffer The MAX3748/MAX3748A limiting amplifier’s CML out- put provides high tolerance to impedance mismatches and inductive connectors. The output current is approx- imately 18mA. The output is disabled by connecting the DISABLE ...

Page 9

Select the Offset-Correction Capacitor The capacitor between CAZ1 and CAZ2 determines the time constant of the signal path DC offset cancellation loop. To maintain stability important to keep a one- decade separation between f and the low-frequency IN ...

Page 10

Compact 155Mbps to 4.25Gbps Limiting Amplifier V (+3.3V OR APD V (+3.3V REFERENCE VOLTAGE) 5-PIN TO HEADER PIN OR IN+ APD MAX3744 TIA IN- DS1858 3-INPUT DIAGNOSTIC MONITOR R1 C1 3kΩ 0.1μF V (+3.3V OR APD CC REFERENCE ...

Page 11

Compact 155Mbps to 4.25Gbps V CC CAZ1 50Ω 50Ω IN+ IN- RSSI DETECT RSSI Pin Configurations V OUT+ OUT- OUTPOL RSSI 13 8 GND CAZ2 LOS 14 7 MAX3748 MAX3748A CAZ1 DISABLE 15 6 GND ...

Page 12

... 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products DESCRIPTION is a registered trademark of Maxim Integrated Products, Inc ...

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