现货库存、技术资料、百科信息、热点资讯，精彩尽在鼎好!
LM393 Dual Differential Comparator
DUAL DIFFERENTIAL COMP ARATORS
The LM393 dual differential comparator is
made up of two voltage comparators that
operate using the same power supply. THe
supply voltage can range from 2 to 36 volts.
FEATURES
Dual supplies can also be used as long as the
difference between them is 2 to 36 volts. The
LM393 is designed to operate at a temperature
range of 0oC to 70oC.
PIN ARRANGEMENT
l Single or dual supplies
8 DIP LM393CD
8 SOP LM393CS
l 2 to 36 V Supply
l Low Input Bias Current
l Low Input Offset Voltage
l Low Input Offset Current
l Low Supply Current Drain
l Output Compatible with TTL, MOS,
and CMOS
ABSOLUTE MAXIMUM RATINGS
Item Symbol Rating Unit
Power Supply Voltage V
Input Differential Voltage Range V
Input Common Mode Voltage Range V
Output Short Circuit-to-Ground I
Output Sink Current (1) I
Power Dissipation @ 25oCP
Derate above 25oC 1/R
Operating Ambient Temperature Range T
Operating Junction Temperature T
Storage Temperature Range T
CC
IDR
ICR
SC
Sink
D
θJA
A
J
S
+36 or +18 V
36 V
-0.3 to +36 V
Continuous mA
20
570 mW
5.7 mW/oC
0 to 70
125
-65 to 150
o
o
o
C
C
C
Notes: 1. The max. output current may be as high as 20 mA, independent of the magnitude of VCC , output short circuits to
VCC can cause excessive heating and eventual destruction.
2. At output switch point, V O = 1.4 Vdc, RS = 0 Ω with VCC from 5.0 Vdc to 30 Vdc, and over the full input
common mode range (0V to VCC = –1.5V).
3. Due to the PNP transistor inputs, bias current will flow out of the inputs. This current is essentially constant,
independent of the output state, therefore, no loading changes will exist on the input lines.
4. Input common mode of either input should not be permitted to go more than 0.3V negative of ground or minus
supply. The upper limit of common mode range is VCC –1.5V .
5. Response time is specified with a 100mV step and 5.0mV of overdrive. With larger magnitudes of overdrive faster
response times are obtainable.
6. The comparator will exhibit proper output state if one of the inputs becomes greater than VCC , the other input
must remain within the common mode range. The low input state must not be less than –0.3V of ground or minus
supply.
LM393 Dual Differential Comparator
ELECTRICAL CHARACTERISTICS
VCC = 5.0Vdc, 0oC < TA < 70oC (unless otherwise noted)
Item Symbol Min Typ Max Unit
Input Offset Voltage (2) V
IO
TA = 25oC --- 1.0 5.0
0oC < TA < 70oC --- --- 9.0
Input Offset Current I
IO
TA = 25oC --- 5.0 50
0oC < TA < 70oC --- --- 150
Input Offset Current (3) I
IB
TA = 25oC --- 25 250
0oC < TA < 70oC --- --- 400
Input Common Mode Voltage Range (3) V
ICR
TA = 25oC 0 --- VCC-1.5
0oC < TA < 70oC 0 --- VCC-2.0
Voltage Gain A
VOL
50 200 --- V/mV
RL > 15K, VCC = 15 Vdc
TA = 25oC
Large Signal Response Time --- --- 300 --- ns
Vin = TTL Logic Swing.
Vref = 1.4 Vdc
VRL = 5.0 Vdc, RL = 5.1K
TA = 25oC
Response Time (5) t
TLH
--- 13 --- µs
VRL = 5.0 Vdc, RL = 5.1K
TA = 25oC
Input Differential Voltage (6) V
ID
--- --- V
All Vin > GND or V-Supply
(if used)
Output Sink Current I
Sink
6.0 16 --- mA
Vin- > 1.0 Vdc, Vin+ = 0 Vdc
Vo < 1.5 Vdc, TA = 25oC
Output Saturation Voltage V
OL
Vin- > 1.0 Vdc, Vin+ = 0 Vdc --- 150 400
I
< 4.0 mA, TA = 25oC
Sink
0oC < TA < 70oC --- --- 700
Output Leakage Current I
OL
Vin- = 0 Vdc, Vin+ > 1.0 Vdc --- 0.1 -- Vo = 5.0 Vdc, TA = 25oC
Vin- = 0 Vdc, Vin+ > 1.0 Vdc --- --- 1000
Vo = 30 Vdc, 0oC < TA < 70oC
Supply Current L
RL = , TA = 25oC --- 0.4 1.0
RL = , VCC = 30 V --- --- 2.5
8
8
CC
mV
nA
nA
V
CC
V
mV
nA
mA
LM393 Dual Differential Comparator
CIRCUIT SCHEMATIC
(Diagram shown is for 1 comparator)
Input Bias Current (nA)
Satuuration Voltage (Vdc)
Output Sink Current (mA)
Supply Voltage (Vdc)
Supply Current (mA)
Supply Voltage (Vdc)
LM393 Dual Differential Comparator
APPLICATIONS INFORMATION
These dual comparators feature high gain, wide bandwidth characteristics. This gives
the device oscillation tendencies if the outputs are capacitively coupled to the inputs via stray
capacitance. This oscillation manifests itself during output transitions (VOL to VOH ). To alleviate
this situation, input resistors <10 kΩ should be used.
The addition of positive feedback (< 10 mV) is also recommended. It is good design
practice to ground all unused pins.
Differential input voltages may be larger than supply voltage without damaging the
comparator’s inputs. Voltages more negative than –0.3 V should not be used.
Zero Crossing Detector
(Single Supply)
Free-Running Square Wave Oscillator
Zero Crossing Detector
(Split Supply)
Time Delay Generator
Comparator With Hysteresis
Loading...