TL/H/5023
LP265/LP365 Micropower Programmable Quad Comparator
December 1994
LP265/LP365 Micropower Programmable
Quad Comparator
General Description
The LP365 consists of four independent voltage comparators. The comparators can be programmed, four at the
same time, for various supply currents, input currents, response times and output current drives. This is accomplished by connecting a single resistor between the V
CC
and I
SET
pins.
These comparators can be operated from split power supplies or from a single power supply over a wide range of
voltages. The input can sense signals at ground level even
with single supply operation. The unique output NPN transistor stages are uncommitted to either power supply. They
can be connected directly to various logic system supplies
so that they are highly flexible to interface with various logic
families.
Application areas include battery power circuits, threshold
detectors, zero crossing detectors, simple serial A/D converters, VCO, multivibrators, voltage converters, power sequencers, and high performance V/F converters, and RTD
linearization.
Features
Y
Single programming resistor to tailor power consumption, input current, speed and output current drive
capability
Y
Wide single supply voltage range or dual supplies (4
V
DC
to 36 VDCorg2.0 VDCtog18 VDC)
Y
Low supply current drain (10 mA) and low power
consumption (10 mW/comparator)
@
I
SET
e
0.5 mA
V
CC
e
5
VDC
Y
Uncommitted output stageÐselectable output levels
Y
Output directly compatible with DTL, TTL, CMOS, MOS
or other special logic families
Y
Input common-mode range includes ground
Y
Differential input voltage equal to the power supply
voltage
Typical Connection
TL/H/5023– 1
Programming Equation
I
SET
e
(Va)b(Vb)b1.3V
R
SET
I
SUPPLY
&
22
c
I
SET
Connection Diagram
Dual-In-Line Package
TL/H/5023– 2
Order Number LP365M, LP365AN or LP365N
See NS Package Numbers M16A or N16A
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.