MAX3272A MAXIM [Maxim Integrated Products], MAX3272A Datasheet

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MAX3272A

Manufacturer Part Number
MAX3272A
Description
+3.3V, 2.5Gbps Low-Power Limiting Amplifiers
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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The MAX3272/MAX3272A 2.5Gbps limiting amplifiers
accept a wide range of input voltages and provide a
constant-level output voltage with controlled edge
speeds. Additional features include power detectors
with programmable loss-of-signal (LOS) indication, an
optional squelch function that mutes the data output sig-
nal when the input voltage falls below a programmable
threshold, and an output polarity selector. These parts
exhibit excellent jitter performance and have low power
dissipation.
The MAX3272/MAX3272A feature current-mode logic
(CML) data outputs that are tolerant of inductive con-
nectors, and are available in a 4mm
age or in die form (MAX3272 only). Along with the
MAX3271, the MAX3272/MAX3272A are ideal for low-
power, compact optical receivers.
19-2269; Rev 3; 11/04
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.
Typical Operating Circuits continue at end of data sheet.
Gigabit Ethernet Optical Receivers
Fibre Channel Optical Receivers
System Interconnects
2.5Gbps Optical Receivers
SONET/SDH Receivers
MAX3271
________________________________________________________________ Maxim Integrated Products
General Description
+3.3V
Applications
C
4mm QFN pack-
CLOS
0.1µF
0.1µF
R
IN+
IN-
CAZ1
OUTPOL
CLOS
TH
TH
+3.3V, 2.5Gbps Low-Power
C
AZ
100Ω
SQUELCH
CAZ2
♦ Single +3.3V Power Supply
♦ 33mA Supply Current
♦ 5ps Deterministic Jitter
♦ 90ps Edge Speed
♦ Output Squelch Function
♦ Programmable Loss-of-Signal Function
♦ CML Output Interface
♦ 20-Pin 4mm
♦ Selectable Output Polarity
+ Denotes Lead-Free Package.
*Dice are designed and guaranteed to operate from -40°C to
+85°C, but are tested only at T
Pin Configuration appears at end of data sheet.
MAX3272EGP
MAX3272E/D
MAX3272AETP+ -40°C to +85°C
MAX3272AEGP
V
CC
+3.3V
GND
PART
SIGNAL
LOSS
LOS
OF
Limiting Amplifiers
MAX3272A
MAX3272/
LOS
Typical Operating Circuit
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
4mm QFN or Thin QFN Package
LEVEL
OUT+
OUT-
Ordering Information
A
= +25°C.
SDI+
SDI-
PIN-
PACKAGE
20 QFN
Dice*
20 Thin QFN T2044-3
20 QFN
MAX3873
+3.3V
V
CDR
GND
CC
SCLKO+
SCLKO-
Features
SDO+
SDO-
PACKAGE
CODE
G2044-3
G2044-3
1

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MAX3272A Summary of contents

Page 1

... Along with the MAX3271, the MAX3272/MAX3272A are ideal for low- power, compact optical receivers. Gigabit Ethernet Optical Receivers Fibre Channel Optical Receivers System Interconnects 2 ...

Page 2

... Voltage at IN+, IN- ..........................(V CC Voltage at SQUELCH, CAZ1, CAZ2, TH, CLOS ...............................................-0. LOS (MAX3272)...........................-0.5V to +6.0V Voltage at LOS, Voltage at LOS, LOS (MAX3272A) .............-0. Voltage at LEVEL...................................................-0.5V to +2.0V Voltage at OUTPOL ...............................................-0.5V to +6.0V Current into LOS, LOS ..........................................-1mA to +9mA Differential Input Voltage (IN+ - IN-).................................2.5V Continuous Current at IN+, IN- ...........................................50mA 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 ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +3.0V to +3.6V -40°C to +85°C. Typical values are PARAMETER SYMBOL High LOS Deassert Level LOS Output High Voltage LOS Output Low Voltage Squelch Input Current Note 1: Dice ...

Page 4

Low-Power Limiting Amplifiers (V = +3.3V +25°C, unless otherwise noted RANDOM JITTER vs. INPUT AMPLITUDE 100 1000 10,000 INPUT AMPLITUDE (mV ...

Page 5

... Inverted Loss-of-Signal Output. LOS is asserted TTL low when the signal drops below the assert LOS 10 threshold set by the TH input. The MAX3272 does not have ESD protection on this pin. The MAX3272A has ESD protection on this pin. Output Current Level. When this pin is not connected, the CML output current is approximately 11 LEVEL 16mA ...

Page 6

... CORRECTION Figure 2. Functional Diagram 6 _______________________________________________________________________________________ Figure functional diagram of the MAX3272/ MAX3272A, comprising a CML input buffer, power detector and loss-of- signal indicators, gain stage, offset- I correction loop, and CML output buffer. OUT The input buffer (Figure 3) provides 100Ω input imped- ance between IN+ and IN-. DC-coupling the inputs is not recommended ...

Page 7

... If ESD protection is desired, a low-capaci- tance Schottky diode or diode array structure, such as the MAX3202E, is recommended (see the Typical Operating Circuits). The LOS and LOS pins on the MAX3272A include ESD protection and result, cannot be interfaced with +5V modules. The high-bandwidth gain stage provides approximately 42dB of gain ...

Page 8

... GND LEVEL Figure 5. CML Output Circuit CML Output Buffer The MAX3272/MAX3272A CML output circuit (Figure 5) provides high tolerance to impedance mismatches and inductive connectors. The output current can be set to two levels using the LEVEL pin. When LEVEL is uncon- nected, the output current is approximately 16mA. ...

Page 9

... MAX3272A QFN* NOTE: EXPOSED PAD MUST BE CONNECTED TO SUPPLY GROUND GND 1 2 IN+ IN- 3 MAX3272A GND THIN QFN* NOTE: EXPOSED PAD MUST BE CONNECTED TO SUPPLY GROUND. _______________________________________________________________________________________ +3.3V, 2.5Gbps Low-Power Limiting Amplifiers PAD ...

Page 10

Low-Power Limiting Amplifiers +3.3V MAX3271 *THE MAX3202E PROVIDES ESD PROTECTION ON THE LOS PIN Wire Bonding Die For high-current density and reliable operation, the MAX3272 uses gold metallization. Make connections to the dice with gold wire only, and ...

Page 11

V CC (PAD 21) GND (PAD 1) IN+ (PAD 2) IN- (PAD 3) GND (PAD 4) TH (PAD (PAD 6) TRANSISTOR COUNT: 726 PROCESS: SiGe Bipolar SUBSTRATE: Insulator, Connect to GND DIE SIZE: 1.68mm ✕ 1.57mm DIE ...

Page 12

Low-Power Limiting Amplifiers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 12 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE 12,16,20,24L QFN, 4x4x0. 21-0106 ...

Page 13

For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ +3.3V, 2.5Gbps Low-Power Limiting Amplifiers Package Information (continued) PACKAGE OUTLINE 12,16,20,24L QFN, 4x4x0. 21-0106 ...

Page 14

Low-Power Limiting Amplifiers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry other than circuitry ...

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