December 1994
LM615 Quad Comparator and Adjustable Reference
General Description
Features
COMPARATORS
The comparators have an input range which extends to the
negative supply, and have open-collector outputs. Improved
over the LM139 series, the input stages of the comparators
have lateral PNP input transistors which enable low input
currents for large differential input voltages and swings
Y
Low operating current
600 mA
Y
Wide supply voltage range
4V to 36V
Y
Open-collector outputs
Input common-mode range
Vb to (Va
Y
b
1.8V)
above Va
.
Y
g
Wide differential input voltage
36V
The voltage reference is a three-terminal shunt-type band-
gap, and is referred to the Vb terminal. Two resistors pro-
gram the reference from 1.24V to 6.3V, with accuracy of
REFERENCE
Y
Adjustable output voltage
1.24V to 6.3V
g
0.6% available. The reference features operation over a
Y
g
Tight initial tolerance available
0.6% (25 C)
§
shunt current range of 17 mA to 20 mA, low dynamic imped-
ance, broad capacitive load range, and cathode terminal
voltage ranging from a diode-drop below Vb to above Va
Y
Wide operating current range
17 mA to 20 mA
Y
Tolerant of load capacitance
.
As
a member of National’s Super-BlockTM family, the
Applications
Y
LM615 is a space-saving monolithic alternative to a multi-
chip solution, offering a high level of integration without sac-
rificing performance.
Adjustable threshold detector
Y
Time-delay generator
Y
Voltage window comparator
Y
Power supply monitor
Y
RGB level detector
Connection Diagram
M Package
N Package
TL/H/11057–24
TL/H/11057–1
Top View
Top View
Ordering Information
For information about surface-mount packaging of this device, please contact the
Analog Product Marketing group at National Semiconductor Corp. headquarters.
Temperature Range
Reference
Tolerances
NSC
Package Number
Military
s
Industrial
40 C
§
Package
s
s
s
a
T
J
b
a
b
55 C
§
T
J
125 C
§
85 C
§
g
80 ppm/ C max
0.6% at 25 C,
§
LM615AMN
LM615AIN
16-Pin
Molded DIP
N16A
J16A
N16A
M16A
§
LM615AMJ/883
(Note 13)
16-Pin
Ceramic DIP
g
150 ppm/ C max
2.0% at 25 C,
§
LM615MN
LM615IN
LM615IM
16-Pin
Molded DIP
§
16-Pin Narrow
Surface Mount
Super-BlockTM is a trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
TL/H/11057
RRD-B30M115/Printed in U. S. A.