ML4622CP Sirenza Microdevices, ML4622CP Datasheet

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ML4622CP

Manufacturer Part Number
ML4622CP
Description
Manufacturer
Sirenza Microdevices
Datasheet

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GENERAL DESCRIPTION
The ML4622 and ML4624 data quantizers are low noise,
wideband, bipolar monolithic ICs designed specifically for
signal recovery applications in fiberoptic receiver systems.
They contain a wideband limiting amplifier which is
capable of accepting an input signal as low as 2mV
with a 55dB dynamic range. This high level of sensitivity
is achieved by using a DC restoration feedback loop
which nulls any offset voltage produced in the limiting
amplifier.
The output stage is a high speed comparator circuit with
both TTL and ECL outputs. An enable pin is included for
added control.
The Link Detect circuit provides a Link Monitor function
with a user selectable reference voltage. This circuit
monitors the peaks of the input signal and provides a
logic level output indicating when the input falls below
an acceptable level. This output can be used to disable
the quantizer and/or drive an LED, providing a visible link
status.
ML4622/ML4624 BLOCK DIAGRAM
1
V
TH
V
V
V
V
ADJ
IN
IN
REF
DC
+
BIAS
THRESH
REF
GEN
CF1
AMP
CF2
LINK DETECT
P-P
C
TIMER
Fiber Optic Data Quantizer
FEATURES
APPLICATIONS
Data rates up to 40MHz or 80MBd
Can be powered by either +5V providing TTL or raised
ECL level outputs or –5.2V providing ECL levels
Low noise design: 25 V RMS over bandwidth
Adjustable Link Monitor function with hystersis
Wide 55dB input dynamic range
Low power design
ML4624 is pin compatible with the ML4621
IEEE 802.3 10BASE-FL Receiver
IEEE 802.5 fiber optic token ring, 4 and 16mbps
Fiber Optic Data Communications and
Telecommunications Receivers
CMP
ECL
ML4622, ML4624
ECL+
ECL–
*ML4624 ONLY
CMP
TTL
TTL OUT
CMP ENABLE
V
V
GND
GND TTL
TTL LINK MON
CC
CC
January 1997
TTL*

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ML4622CP Summary of contents

Page 1

GENERAL DESCRIPTION The ML4622 and ML4624 data quantizers are low noise, wideband, bipolar monolithic ICs designed specifically for signal recovery applications in fiberoptic receiver systems. They contain a wideband limiting amplifier which is capable of accepting an input signal as ...

Page 2

ML4622, ML4624 PIN CONNECTIONS ML4622 16-Pin DIP or SOIC (Narrow) TTL LINK MON 1 16 CMP ENABLE GND ADJ IN– REF TIMER ...

Page 3

PIN DESCRIPTION NAME FUNCTION TTL LINK MON TTL Link Monitor output. Signal is low when the V exceed the minimum threshold, which is set by a voltage on the V ADJ pin. Signal is high when the TH input signal ...

Page 4

ML4622, ML4624 ABSOLUTE MAXIMUM RATINGS V – GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to ...

Page 5

ML4622, ML4624 ELECTRICAL CHARACTERISTICS (Continued) Over recommended operating conditions of T industrial temperature range SYMBOL PARAMETER V Input Threshold Voltage TH ML4622 ML4624 Hystersis V Common mode voltage CM on VIN+, VIN– ECL Output High Voltage ...

Page 6

ML4622, ML4624 FUNCTIONAL DESCRIPTION AMPLIFIER The ML4622, ML4624 have an adjustable Bandwidth limiting amplifier. Maximum sensitivity is achieved through the use restoration feedback loop and AC coupling the input. When AC coupled, the input DC bias voltage ...

Page 7

To avoid stability problems, the value of this capacitor should be at least 10 times larger than the input coupling capacitors. COMPARATOR Two types of comparators are ...

Page 8

... ML4622, ML4624 ORDERING INFORMATION PART NUMBER ML4622CP ML4622CS ML4622IS ML4624CP ML4624CQ © Micro Linear 1997 is a registered trademark of Micro Linear Corporation Products described herein may be covered by one or more of the following patents: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; 5,418,502; 5,508,570; 5,510,727; 5,523,940; 5,546,017; ...

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