MAX3761EEP+ Maxim Integrated Products, MAX3761EEP+ Datasheet

IC AMP LIMITING 622MBPS 20-QSOP

MAX3761EEP+

Manufacturer Part Number
MAX3761EEP+
Description
IC AMP LIMITING 622MBPS 20-QSOP
Manufacturer
Maxim Integrated Products
Type
Limiting Amplifierr
Datasheet

Specifications of MAX3761EEP+

Applications
Optical Networks
Mounting Type
Surface Mount
Package / Case
20-QSOP
Operating Supply Voltage
5 V
Supply Current
25 mA
Operating Temperature Range
+ 85 C
Available Set Gain
12.5 dB
Mounting Style
SMD/SMT
Number Of Channels
1
Power Dissipation
591 mW
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX3761/MAX3762 limiting amplifiers, with 4mV
sensitivity and PECL data outputs, are optimized for
operation in low-cost, 622Mbps, LAN/ATM LAN fiber
optics applications.
An integrated power detector senses the input signal’s
amplitude. A received-signal-strength indicator (RSSI)
gives an analog indication of the power level, while the
complementary loss-of-signal (LOS) outputs indicate if
the input power level exceeds the programmed
threshold level. The LOS threshold can be adjusted to
detect signal amplitudes between 3mVp-p and
100mVp-p, providing a 15dB LOS adjustment in fiber
optic receivers. The LOS outputs have 3.5dB of
hysteresis, which prevents chatter when input signal
levels are small. The MAX3761’s LOS outputs are com-
patible with TTL-logic levels. The MAX3762 has PECL
LOS outputs.
DISABLE and LOS can be used to implement a squelch
function, which turns off the data outputs when the
input signal is below the programmed threshold.
19-1097; Rev 4; 8/08
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.
________________________Applications
__________________Pin Configuration
_______________General Description
TOP VIEW
622Mbps LAN/ATM LAN Receivers
155Mbps LAN/ATM LAN Receivers
FILTER
RSSI
VIN+
GND
VIN-
SUB
CZN
CZP
V
EN
CC
________________________________________________________________ Maxim Integrated Products
10
1
2
3
4
5
6
7
9
8
with Chatter-Free Power Detect for LANs
MAX3761
MAX3762
Low-Power, 622Mbps Limiting Amplifiers
QSOP
17
14
13
12
20
19
18
16
15
11
DISABLE
LOS+
LOS-
V
VCCO
OUT+
OUT-
GNDO
VTH
INV
CC
♦ ♦ Chatter-Free Power Detector with Programmable
♦ ♦ 4mV Input Sensitivity
♦ ♦ PECL Data Outputs
♦ ♦ Single 5V Power Supply
♦ ♦ 250ps Output Edge Speed
♦ ♦ Low 15ps Pulse-Width Distortion
♦ ♦ TTL Loss-of-Signal Interface Logic—MAX3761
♦ ♦ PECL Loss-of-Signal Interface Logic—MAX3762
* Dice are designed to operate from -40°C to +85°C, but are
tested and guaranteed only at T
+ Denotes a lead-free/RoHS-compliant package.
____________________________Features
_________Typical Operating Circuits
MAX3761EEP+
MAX3761E/D
MAX3762EEP+
MAX3762E/D
MAX3762 at end of data sheet.
BYPASS
SUPPLY
Loss-of-Signal Outputs
100pF
+5V
PART
100pF
+V
CC
5.6nF
5.6nF
C
100kΩ
10nF
C
C
FILTER
IN
IN
R1
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
RSSI
FILTER
V
EN
VCCO
VIN+
VIN-
INV
CC
MAX3761
A
22kΩ
R2
= +25°C.
CZP
DISABLE
VTH
GNDO
LOS-
OUT-
OUT+
LOS+
GND
CZN
SUB
20 QSOP
Dice*
20 QSOP
Dice*
PIN-PACKAGE
50Ω
C
150pF
AZ
V
CC
50Ω
- 2V
1

Related parts for MAX3761EEP+

MAX3761EEP+ Summary of contents

Page 1

... Output Edge Speed ♦ ♦ Low 15ps Pulse-Width Distortion ♦ ♦ TTL Loss-of-Signal Interface Logic—MAX3761 ♦ ♦ PECL Loss-of-Signal Interface Logic—MAX3762 PART MAX3761EEP+ MAX3761E/D MAX3762EEP+ MAX3762E/D * Dice are designed to operate from -40°C to +85°C, but are tested and guaranteed only Denotes a lead-free/RoHS-compliant package ...

Page 2

Low-Power, 622Mbps Limiting Amplifiers with Chatter-Free Power Detect for LANs ABSOLUTE MAXIMUM RATINGS V , VCCO............................................................-0.5V to +7.0V CC FILTER, RSSI, EN, VIN+, VIN-, CZP, CZN, DISABLE, LOS+, LOS-, INV, VTH...............-0. PECL Output Current (OUT+, OUT-, LOS+, LOS-) ...

Page 3

Low-Power, 622Mbps Limiting Amplifiers with Chatter-Free Power Detect for LANs AC ELECTRICAL CHARACTERISTICS (V = +4.5V to +5.5V, PECL outputs terminated with 50Ω noted. Typical values are +5.0V PARAMETER Minimum LOS Assert ...

Page 4

Low-Power, 622Mbps Limiting Amplifiers with Chatter-Free Power Detect for LANs ____________________________Typical Operating Characteristics (continued) (MAX3761/MAX3762 EV kit +5.0V, PECL outputs terminated with 50Ω unless otherwise noted.) RSSI vs. TEMPERATURE 23 (622Mbps PRBS) ...

Page 5

Low-Power, 622Mbps Limiting Amplifiers with Chatter-Free Power Detect for LANs ____________________________Typical Operating Characteristics (continued) (MAX3761/MAX3762 EV kit +5.0V, PECL outputs terminated with 50Ω unless otherwise noted.) DATA OUTPUT SINGLE-ENDED PRBS PATTERN) INPUT ...

Page 6

Low-Power, 622Mbps Limiting Amplifiers with Chatter-Free Power Detect for LANs V GND CC LIMITER VIN+/VIN FWD FWD FILTER C FILTER V CC FWD = FULL-WAVE DETECTOR Figure 1. Functional Diagram _______________Detailed Description Figure 1 shows the functional diagram ...

Page 7

Low-Power, 622Mbps Limiting Amplifiers with Chatter-Free Power Detect for LANs Loss-of-Signal Indicator The MAX3761/MAX3762 includes a loss-of-signal moni- tor with a programmable assert threshold and a hys- teresis comparator. Internally, one comparator input is tied to the RSSI output signal ...

Page 8

Low-Power, 622Mbps Limiting Amplifiers with Chatter-Free Power Detect for LANs Capacitor Selection A typical MAX3761/MAX3762 implementation requires four external capacitors. To select the capacitors, first determine the following parameters in the receiver sys- tem (see the Applications Information section for ...

Page 9

Low-Power, 622Mbps Limiting Amplifiers with Chatter-Free Power Detect for LANs __________Applications Information Converting Average Optical Power to Signal Amplitude Many of the MAX3761/MAX3762’s specifications relate to input-signal amplitude. When working with fiber optic receivers, the input is usually expressed in ...

Page 10

Low-Power, 622Mbps Limiting Amplifiers with Chatter-Free Power Detect for LANs For LOS assert at -35dBm, select R1 = 100kΩ and R2 = 22kΩ, which programs the LOS assert at input ≅ 3mV. With this selection, LOS assert time will typically ...

Page 11

Low-Power, 622Mbps Limiting Amplifiers with Chatter-Free Power Detect for LANs _____________________________________Typical Operating Circuits (continued) +5V 100pF 100pF Package Information For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE 20 QSOP E20+1 ______________________________________________________________________________________ CZP ...

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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