LND393
Dual Differential Comparators
DATA SHEET
GENERAL DESCRIPTION
Wide supply (Voltage range single
and dual supplies 5V to 30V,
2.5V to
15V)
Very Low supply current drain(0.8mA)
Low input biasing current(25nA)
Low input offset voltage(5nA)
Maximum offset voltage(5mV)
Input common-mode voltage range
includes ground
Differential input voltage range equal
to the power supply voltage
Output voltage compatible with TTL,
DTL,ECL ,MOS and CMOS logic
systems
FEATURES
The LND393 consists of two independent
precision voltage comparators with an offset
voltage specification as low as 2.0 mV max for
two comparators. They are specifically
designed to operate from a single power supply
over a wide range of voltages. In addition, the
comparators have the unique ability in that the
input common-mode voltage range includes
ground, while operated from a single power
supply voltage. Operation from split power
supplies is also possible and the low power
supply current drain is independent of the
magnitude of the power supply voltage.
Application areas include limit comparators,
simple analog to digital converters, pulse,
squarewave and time delay generators: wide
range VCO, MOS clock timers, multi-vibrators
and high voltage digital logic gates. The
LND393 was designed to directly interface with
TTL and CMOS. When the LND393 is operated
from both plus and minus power supplies, it will
directly interface with MOS logic where their low
power drain is a distinct advantage over
standard comparators.
ADVANTAGES
High precision comparators
Reduce
V
OS
drift over temperature
Power drain suitable for battery
operation
Compatible with all forms of logic
Allows sensing near ground
Eliminates need for dual supplies
PIN CONFIGURATION
A
B
1
8
2
3
4
5
6
7
OUTPUT A
INVERTING
INPUT A
NON-INVERTING
INPUT A
GROUND
V+
OUTPUT B
INVERTING
INPUT B
NON-INVERTING
INPUT B
+ +
-
-
Linear Dimensions, Inc. 445 East Ohio Street, Chicago IL 60611 USA tel 312.321.1810 fax 312.321.1830
www.lineardimensions.com
Parameter
Test Conditions *
Min
Typ
Max
Unit
25
C
2
5
V
IO
Input offset voltage
V
CC
=5V to 30V
V
IC
=V
ICR
min,
V
O
=1.4V
Full range
9
mV
25
C
5
50
I
IO
Input offset current
V
O
=1.4V
Full range
150
nA
25
C
-25
-250
I
IB
Input bias current
V
O
=1.4V
Full range
-400
nA
25
C
0
V
CC
-1.5
V
ICR
Common-mode input
voltage range**
Full
Range
0
V
CC
-2
V
A
VD
Large-signal differential
voltage amplification
V
CC =
15V
V
O
=1.4V to 11.4 V,
R
L
15k
25
C
50
200
V/mV
V
OH =
5V, V
ID =
1V
25
C
0.1
50
nA
I
OH
High-level output current
V
OH =
30V, V
ID
=1V
Full
Range
1
A
25
C
150
400
mV
V
OL
Low-Level output
voltage
I
OL
=4mA, V
ID
=-1V
Full
Range
700
mA
I
OL
Low-level output current
V
OL=
1.5V,V
ID
=-1V
25
C
6
mA
V
CC=
5V
25
C
0.8
1
mA
I
CC
Supply current
R
L
=
V
CC
=30V
Full
Range
2.5
mA
*Full range (MIN to Max), for the LND393 is 0
C to 70C. All characteristics are measured with zero common-mode
input voltage unless otherwise specified.
**The voltage at either input or common-mode should not be allowed to go negative by more than 0.3V. The upper
end of the common-mode voltage range is V
CC
1.5V, but either or both inputs can go to 30V without damage.
Parameter
Test Conditions
Min
Typ
Max Unit
100-mV input step with 5-mV
overdrive
1.3
Response time
R
L
connected to 5V
through 5.1 k
,
C
L=
15pF*(see Note
1)
TTL-level input step
0.3
s
*C
L
includes probe and jig capacitance.
Note 1: The response time specified is the interval between the input step function and the instant when the output
crosses 1.4V.
LND393
SWITCHING CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
Linear Dimensions, Inc. 445 East Ohio Street, Chicago IL 60611 USA tel 312.321.1810 fax 312.321.1830
www.lineardimensions.com
LND393
TYPICAL APPLICATIONS
(V+ =5.0Vdc)
LND393A
+5.0 V
+
-
DC
DRIVING CMOS
100 K
1
2
3
LND393A
V
O
V+
+V
+V
IN
REF
+
-
BASIC COMPARATOR
3.0 K
+5.0 V
-
LND393A
+
DC
DRIVING TTL
10 K
1
2
3
1
2
3
V
O
V+
+V
+V
IN
REF
+
-
NON INVERTING COMPARATOR
WITH HYSTERESIS
1/2 LND193
3.0 K
10K
10M
V+
REF
-
+V
V
+V
INVERTING COMPARATOR
WITH HYSTERESIS
O
IN
+
1/2 LND193
3.0 K
1M
1M
1M
1/2LND193
V+ (12 Vdc)
+
-
LIMIT COMPARATOR
-
+
IN
+V
1/2LND193
REF LOW
+V
+V
REF HI
S
2R
S
2R
R
S
10.0 K
1
2
LAMP
1
2
Linear Dimensions, Inc. 445 East Ohio Street, Chicago IL 60611 USA tel 312.321.1810 fax 312.321.1830
www.lineardimensions.com
LND393
1/2 LND193
V+
+
-
+15 Vdc
V
O
D1
D2
R1
R2
*
* For Large Raios of R1/R2, D1 can be
omitted.
t0t1 t2
6 s
60 s
PULSE GENERATOR
15k
1M
1M
1M
1M
80 pF
100k
-
V+
+
1/2 LND193
ZERO DETECTOR CROSSING
(SINGLE POWER SUPPLY)
V
IN
V
O
5.1k
10k
20M
5.1k
5.1k
100k
100k
1/2 LND193
V
O
V+
+
-
V+
SQUAREWAVE OSCILLATOR
0
V+
1-100kHz
4.3K
100K
100K
100K
100K
75 pF
Linear Dimensions, Inc. 445 East Ohio Street, Chicago IL 60611 USA tel 312.321.1810 fax 312.321.1830
www.lineardimensions.com
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