MVL107S SINGLE-CHANNEL VOLTAGE COMPARATOR

 

ULTRA-FAST COMPARATOR FOR DISCRIMINATORS, TDCs AND WIRE CHAMBER FRONT-ENDS

The Model MVL107S is a voltage comparator designed for applications requiring ultra-high speed and accurate timing. The devices are manufactured using a high speed bipolar process which results in an extremely short (3.5 nsec) propagation delay with operation at speeds in excess of 350 MHz. The standard package is a surface mount so8, contact LeCroy for other packaging options.

The MVL107S incorporates a unique hysteresis feature for exceptionally clean operation. When the comparator changes state, an internal differential input offset of nominally 4.8 mV is generated. This positive feedback drives the device quickly through its switching region, greatly reducing the possibility of oscillation or output chatter with small or slowly changing inputs. The propagation delay is typically 3.5 nsec and changes by only 100 psec across a 5 to 100 mV overdrive range. This very low delay variation makes this comparator extremely useful in critical timing applications.

The MVL107S provides differential inputs and complementary outputs compatible with the ECL logic family. The outputs can drive 50 ohm loads or 100 ohm twisted pair. (External pull-down resistors are required.)

 

SPECIFICATIONS

MAXIMUM RATING            
           
Symbol Parameter

Min

Typ

Max

Units

 Comments
Vcc Positive Supply Voltage   5 6 V  
VEE Negative Supply Voltage   -5.2 -6 V  
Input Voltage     �4.0 V  
Differential Input Voltage     �3.6 V  
Output Current     30 mA Per output pin
Power Dissipation     80 mW  
T Operating Temperature 0 25 70 � C  
           
ELECTRICAL CHARACTERISTICS
           
Symbol Parameter

Min

Typ

Max

Units

 Comments
IOS Input offset current -0.5 �0.05 0.5 �A  
IB Input bias current 1.6 3.5 6 �A  
Rin Input resistance 20 30   Kohm  
Cin Input capacitance 1.2 1.6 2.1 pF  
Vcm Input voltage range -2   1.7 V  
VT Threshold 0 2.6 6 mV  
VH Hysteresis voltage 4.4 4.8 5.2 mV  
VOL Output low level 1.95 -1.8 -1.6 V RT > 510 ohm, VT > -5.2 V
VOH Output high level -0.91 -0.79 -0.74 V RT = 510 ohm, VT = -5.2 V
I+ Positive supply current   5.5   mA  
I- Negative supply current   6   mA  
PD Power dissipation   59   mW  
           
SWITCHING CHARACTERISTICS
           
Symbol Parameter

Min

Typ

Max

Units

 Comments
tpd Propagation delay 3 3.5 4 nsec 50 mV overdrive Note 1
delta tpd/delta T Avg. Temp. Const. of prop. delay   2   psec/�C 0 to 70�C
tr, tf Transition time 1 1.4 2 nsec RT = 510 ohm;VT = -5.2 V
DPR Double pulse resolution   3.8   nsec Note 2
fmax Max. toggle frequency   350   MHz  
Tmin Min. input width   2   nsec  

 

Notes:

1. Propagation delays are defined as the delay between a positive going input and an output transition of either polarity. The input overdrive is 50 mV with the threshold set at 0 mV.

2. Double pulse resolution is defined as the minimum pulse pair spacing at which the MVL107S responds to the second pulse of the pair. The output levels of the second pulse must cross V OH and VOL.

3. Characteristics measured at VCC = +5.0 V, V EE = -5.2 V and T = 25�C.

 

MVL107S Simplified Schematic.

MVL107S Pin Assignments.so8 Package.

 

Copyright� February 1997. LeCroy is a registered trademark of LeCroy Corporation. All rights reserved. Information in this publication supersedes all earlier versions. Specifications and prices subject to change without notice.