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Limiting Amplifier. MAX3746 Datasheet

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Limiting Amplifier. MAX3746 Datasheet






MAX3746 Amplifier. Datasheet pdf. Equivalent




MAX3746 Amplifier. Datasheet pdf. Equivalent





Part

MAX3746

Description

Limiting Amplifier



Feature


www.DataSheet4U.com 19-3386; Rev 2; 6/07 Low-Power, 622Mbps to 3.2Gbps Limitin g Amplifier General Description The MAX 3746 multirate limiting amplifier funct ions as a data quantizer for SONET, Fib re-Channel, and Gigabit Ethernet optica l receivers. The amplifier accepts a wi de range of input voltages and provides selectable-level, current-mode logic ( CML) output voltag.
Manufacture

Maxim Integrated Products

Datasheet
Download MAX3746 Datasheet


Maxim Integrated Products MAX3746

MAX3746; es with controlled edge speeds. A receiv ed-signal-strength indicator (RSSI) is available when the MAX3746 is DC-couple d to the MAX3744/MAX3724 SFP transimped ance amplifier (TIA). A receiver consis ting of the MAX3744/MAX3724 and the MAX 3746 can provide up to 19dB RSSI dynami c range. Additional features include a programmable loss-of-signal (LOS) detec t, an optional dis.


Maxim Integrated Products MAX3746

able function (DISABLE), and an output-s ignal polarity reversal (OUTPOL). Outpu t disable can be used to implement sque lch. The combination of the MAX3746 and the MAX3744/ MAX3724 allows for the im plementation of all the smallform-facto r SFF-8472 digital diagnostic specifica tions using a standard 4-pin TO-46 head er. The MAX3746 is pin-for-pin compatib le with the MAX374.


Maxim Integrated Products MAX3746

8A limiting amplifier and consumes 30% l ess power. The MAX3746 is packaged in a 3mm x 3mm, 16-pin QFN package. ♦ SFP Reference Design Available ♦ Low 115 mW Power Consumption ♦ 16-Pin QFN Pac kage with 3mm x 3mm Footprint ♦ 70ps Rise and Fall Time ♦ Loss-of-Signal w ith Programmable Threshold ♦ RSSI Int erface (with MAX3744/MAX3724 TIA) ♦ O utput Disable ♦ Polarity Select .

Part

MAX3746

Description

Limiting Amplifier



Feature


www.DataSheet4U.com 19-3386; Rev 2; 6/07 Low-Power, 622Mbps to 3.2Gbps Limitin g Amplifier General Description The MAX 3746 multirate limiting amplifier funct ions as a data quantizer for SONET, Fib re-Channel, and Gigabit Ethernet optica l receivers. The amplifier accepts a wi de range of input voltages and provides selectable-level, current-mode logic ( CML) output voltag.
Manufacture

Maxim Integrated Products

Datasheet
Download MAX3746 Datasheet




 MAX3746
www.DataSheet4U.com
19-3386; Rev 2; 6/07
Low-Power, 622Mbps to 3.2Gbps
Limiting Amplifier
General Description
The MAX3746 multirate limiting amplifier functions as a
data quantizer for SONET, Fibre-Channel, and Gigabit
Ethernet optical receivers. The amplifier accepts a wide
range of input voltages and provides selectable-level,
current-mode logic (CML) output voltages with con-
trolled edge speeds. A received-signal-strength indica-
tor (RSSI) is available when the MAX3746 is
DC-coupled to the MAX3744/MAX3724 SFP transim-
pedance amplifier (TIA). A receiver consisting of the
MAX3744/MAX3724 and the MAX3746 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 dis-
able can be used to implement squelch.
The combination of the MAX3746 and the MAX3744/
MAX3724 allows for the implementation of all the small-
form-factor SFF-8472 digital diagnostic specifications
using a standard 4-pin TO-46 header.
The MAX3746 is pin-for-pin compatible with the
MAX3748A limiting amplifier and consumes 30% less
power. The MAX3746 is packaged in a 3mm x 3mm,
16-pin QFN package.
Applications
Gigabit Ethernet SFF/SFP Transceiver Modules
Fibre-Channel SFF/SFP Transceiver Modules
Multirate OC-12 to OC48-FEC SFF/SFP
Transceiver Modules
Features
SFP Reference Design Available
Low 115mW Power Consumption
16-Pin QFN Package with 3mm x 3mm Footprint
70ps Rise and Fall Time
Loss-of-Signal with Programmable Threshold
RSSI Interface (with MAX3744/MAX3724 TIA)
Output Disable
Polarity Select
8.4psP-P Deterministic Jitter (3.2Gbps)
Improved EMI Performance
Selectable CML Output levels
Pin Compatible with MAX3748A
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG CODE
MAX3746ETE -40°C to +85°C 16 Thin QFN T1633F-3
MAX3746HETE* -40°C to +85°C 16 Thin QFN T1633F-3
*The MAX3746HETE is a hybrid lead-free package. See the
Detailed Description section for more information.
Pin Configuration appears at end of data sheet.
Typical Operating Circuits continued at end of data sheet.
Typical Operating Circuits
4-PIN TO HEADER
SFP OPTICAL RECEIVER
OUTPOL
VCC
SUPPLY FILTER
HOST BOARD
HOST FILTER
VCC_RX
MAX3744 TIA
DS1859
3-INPUT DIAGNOSTIC
MONITOR
R1
3kΩ
IN+
IN-
MAX3746
RSSI TH
GND
RTH = 14kΩ
C1
0.1μF
OUT+
OUT-
0.1μF
0.1μF
DISABLE LOS
50Ω
SERDES
50Ω
4.7kΩ TO 10kΩ
2.97V TO 3.6V
LOS
________________________________________________________________ Maxim Integrated Products 1
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.




 MAX3746
Low-Power, 622Mbps to 3.2Gbps
Limiting Amplifier
ABSOLUTE MAXIMUM RATINGS
Power-Supply Voltage (VCC) .................................-0.5V to +4.5V
Voltage at IN+, IN- ..........................(VCC - 2.4V) to (VCC + 0.5V)
Voltage at DISABLE, OUTPOL, RSSI,
LOS, TH ...................................................-0.5V to (VCC + 0.5V)
Current into LOS.....................................................1mA to +9mA
Differential Input Voltage (IN+ - IN-) .....................................2.5V
Continuous Current at CML Outputs
(OUT+, OUT-) ................................................-25mA to +25mA
Continuous Power Dissipation (TA = + 70°C)
16-Pin QFN (derate 17.7mW above +70°C) .....................1.4W
Operating Junction Temperature Range (TJ) ....-55°C to +150°C
Storage Ambient Temperature Range (Ts) .......-55°C to +150°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = +2.97V to +3.63V, CML output load is 50Ω to VCC, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC =
+3.3V, TA = +25°C, unless otherwise specified. The data input transition time is controlled by 4th-order Bessel filter with f-3dB = 0.75 x
2.667GHz for all data rates of 2.667Gbps and below, and with f-3dB = 0.75 x 3.2GHz for a data rate of 3.2Gbps.)
PARAMETER
Single-Ended Input Resistance
Input Return Loss
Input Sensitivity
Input Overload
Single-Ended Output Resistance
Output Return Loss
CML Differential Output Voltage
SYMBOL
RIN
se S11
diff S11
VIN-MIN
VIN-MAX
ROUT
diff S22
CONDITIONS
Single ended to VCC
Single ended, f < 3GHz, DUT is powered on
Differential, f < 3GHz, DUT is powered on
(Note 1)
(Note 1)
Single ended to VCC
Differential, f < 3GHz, DUT is powered on
4mVP-P < VIN < 1200mVP-P,
OUTPOL connected to VCC or GND
4mVP-P < VIN < 1200mVP-P,
OUTPOL open or connected to 30kΩ
MIN
42
1200
42
600
400
TYP
50
14
15
2
50
20
800
500
MAX
58
UNITS
Ω
dB
4 mVP-P
mVP-P
58 Ω
dB
1000
600
mVP-P
Differential Output Signal when
Disabled
Deterministic Jitter
(Note 3)
Outputs AC-coupled,
VIN-MAX applied to input (Note 2)
K28.5 pattern at 3.2Gbps (Note 2)
K28.5 pattern at 3.2Gbps at TA = +100°C
223 - 1 PRBS equivalent at 2.7Gbps (Note 2)
223 - 1 PRBS equivalent pattern at 2.7Gbps
at TA = +100°C
DJ K28.5 pattern at 2.1Gbps
K28.5 pattern at 2.1Gbps at TA = +100°C
223 - 1 PRBS equivalent pattern at 622Mbps
(Note 2)
10 mVP-P
8.4 18
10.2
11.6 23
13.1
8 20 psP-P
9.7
42.5 69
223 - 1 PRBS equivalent pattern at 622Mbps
at TA = +100°C
47.8
2 _______________________________________________________________________________________




 MAX3746
Low-Power, 622Mbps to 3.2Gbps
Limiting Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.97V to +3.63V, CML output load is 50Ω to VCC, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC =
3.3V, TA = +25°C, unless otherwise specified. The data input transition time is controlled by 4th-order Bessel filter with f-3dB = 0.75 x
2.667GHz for all data rates of 2.667Gbps and below, and with f-3dB = 0.75 x 3.2GHz for a data rate of 3.2Gbps.)
PARAMETER
Random Jitter
Data Output Transition
Time
Input-ReferredNoise
Low-Frequency Cutoff
Power-Supply Current
Power-Supply Noise Rejection
LOSS-OF-SIGNAL (Notes 2, 6)
LOS Hysteresis
LOS Assert/Deassert Time
Low LOS Assert Level
Low LOS Deassert Level
Medium LOS Assert Level
Medium LOS Deassert Level
High LOS Assert Level
High LOS Deassert Level
CM_RSSI SPECIFICATION
RSSI Current Gain
VCM to IRSSI 3dB Bandwidth
Input-Referred RSSI Current
Stability
RSSI Output Compliance Voltage
TTL/CMOS I/O
LOS Output High Voltage
LOS Output Low Voltage
SYMBOL
CONDITIONS
Input = 4mVP-P (Notes 2, 4)
4mVP-P < VINP-P < 1200mVP-P,
20% to 80% (Note 2)
(Note 2)
ICC
PSNR
Includes the CML output current; OUTPOL
connected to VCC or GND
Includes the CML output current; OUTPOL
open or connected to 30kΩ to GND
Excludes the CML output current and the
CM_RSSI circuitry; OUTPOL connected to
VCC or GND (Note 5)
f < 2MHz
10 log (VDEASSERT / VASSERT)
(Note 7)
RTH = 2kΩ
RTH = 2kΩ
RTH = 14kΩ
RTH = 14kΩ
RTH = 25kΩ
RTH = 25kΩ
ARSSI IRSSI / ICM_RSSI (Note 8)
IRSSI
ARSSI
VRSSI
Input < 6.6mA, 0V VRSSI 2.5V (Note 9)
VOH RLOS = 4.7kΩ to 10kΩ to Vcc_host (3V)
VOL RLOS = 4.7kΩ to 10kΩ to Vcc_host (3.6V)
MIN TYP MAX UNITS
3 7 psRMS
70 114
ps
150 µVRMS
20 kHz
35 41.5
29 35
mA
20 25
40 dB
1.25 2.2
dB
2.3 50 µs
2.6 4 6.4 mVP-P
6 9.6 mVP-P
19.6 28 31.8 mVP-P
42 54.7 mVP-P
36 50 54.3 mVP-P
84 114 mVP-P
0.031
40
-40 +36
0 2.0
kHz
µA
V
2.4 V
0.4 V
_______________________________________________________________________________________ 3






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