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LESHAN RADIO COMPANY, LTD.
Dual Differential
Comparators
LR393
DESCRIPTION:
The LR393 consists of two independent voltage
comparators with an offset voltage specification as low as
2.0mV max. for two comparators which were designed
specifically to operation from a single power supply over a
wide range of voltages. Operate from split power supplies
is also possible,and the low power supply current drain is
independent of the magnitude of the power supply voltage.
These comparators also have a unique characteristic in
that the input common-mode voltage range includes ground,
even though operated from a single power supply voltage.
DIP-8
SOP-8
FEATURE:
z Wide supply voltage range: single supply operation: 2V to 36V, dual supply operation: f1V to f18V
z Very low supply current drain (0.8mA) independent of supply voltage(2.0mW/comparator at 5.0 VDC)
z Low input biasing current: 25nA
z Low input offset current: 5.0nA; Low input offset voltage: 5.0mV
z Input common-mode voltage range includes ground
z Differential input voltage range equal to the power supply voltage
z Output voltage compatible with TTL,DTL,ECL,MOS and CMOS logic systems.
BLOCK DIAGRAM
ORDERING INFORMATION
VCC + Input
R2
2.1 k
Q4
R4
Q3
Q5
2.0 k
Q6
F1
− Input
Output
Q14
Device
LR393
LR393D
Package
DIP-8
SOP-8
PIN CONFIGURATION
Q10
Q1
Q9
Q8
Q2
R1
4.6 k
Q11
Q16
Q12
Q15
Output 1 1
-Input 1 2
+Input 1 3 +
GND 4
8 Vcc
7 Output 2
6 -Input 2
+ 5 +Input 2
NOTE: Diagram shown is for 1 comparator
(Top View)
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LESHAN RADIO COMPANY, LTD.
PIN DESCRIPTIONS
No Description
1 Output 1
2 -Input1
3 +Input1
4 Ground
Symbol
OUT1
IN1˄-˅
IN1˄+˅
GND
No
5
6
7
8
ABSOLUTE MAXIMUM RATINGS
Characteristics
Supply Voltage
Single supply voltage
Dual supplies voltage
Differential Input Voltage
Input common-mode voltage
Output short-circuit to ground
Input Current
Maximum junction temperature
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Symbol
Vcc
VIDR
VICR
IOG
IIN
TJ
PD
Tamb
Tstg
Description
+Input2
-Input2
Output 2
Supply Voltage
Value
Min Max
r18
36
36
-0.3 36
20
50
125
570
0 70
-65 150
LR393
Symbol
IN2˄+˅
IN2˄-˅
OUT2
Vcc
Unit
V
V
V
mA
mA
ć
mW
ć
ć
ELECTRICAL CHARACTERISTICS˄Un less otherwise specified :Vcc=5VˈTamb=25ć˅
Characteristics
Test conditions
Symbo Mi Typ. Max Unit
Input Offset Voltage
0ć d Ta d 70ć
VIO
r1.0 r5.0
r9.0
mV
Input Offset Current
0ć d Ta d 70ć
IIO
r5.0 r50
r150
nA
Input Bias Current
0ć d Ta d 70ć
IIB
25 250
nA
400
Input Common-mode
Voltage Range
0ć d Ta d 70ć
VICR
0
0
Vcc-1.5
Vcc-2.0
V
Supply Current
RL=f dual comparator
RL=fˈdual comparator Vcc=30V
Icc
0.4
1.0
2.5
mA
Voltage Gain
RL t 15K:ˈVcc=15V
Gv 50 200
V/mV
Large Signal Response VIN=TTL Logic SwingˈVREF=1.4Vˈ
Time
VRL=5.0Vˈ RL=5.1K:
tRES
300
ns
Response Time
VRL=5.0Vˈ RL=5.1K:
tRES 1.3
ns
Input Differential Voltage
VID Vcc V
Output Sink Current
VIN˄-˅t 1.0VˈVIN˄+˅=0VˈVo d 1.5V ISINK 6.0 16
mA
VIN˄-˅t 1.0VˈVIN˄+˅=0VˈISINK d 4.0mA
150 400
output saturation voltage VIN˄-˅t 1.0VˈVIN˄+˅=0VˈISINK d 4.0mA VSAT
0ć d Ta d 70ć
mV
700
Output Leakage Current
VIN˄+˅t 1.0VˈVIN˄-˅=0VˈVo=5.0V
VIN˄+˅t 1.0VˈVIN˄-˅=0VˈVo=30V
0ć d Ta d 70ć
IOL
0.1
1000
nA
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LESHAN RADIO COMPANY, LTD.
APPLICATION CIRCUIT
LR393
+15 V
R1
8.2 k
Vin R1
D1
R4
220 k
6.8 k
R2
R5
220 k
*
LR393
)
10 k
15 k 10 M
R3
D1 prevents input from going negative by more than 0.6 V.
R1 + R2 = R3
R3 R5 for small error in zero crossing.
10
Figure 1. Zero Crossing Detector
(Single Supply)
1.0 MW
VCC
51 k
0.001 mF LR393
+
VCC
RL
10 k
VO
51 k VCC
51 k
VO
0
t
Figure 3. Free−Running Square−Wave Oscillator
Vin Vin(min)
+VCC
Q
* 10 k
Vin
LR393
)
VCC
−VEE
VO
− VEE
DQ
Vin(min) [ 0.4 V peak for 1% phase distortion (DQ).
Q
Figure 2. Zero Crossing Detector
(Split Supply)
VCC VCC
t
LR393
+ VC
R
C
‘‘ON’’ for t ­ tO + Dt
where:
Dt
=
RC ȏ n (
Vref
VCC
)
LR393
+
+ Vref
RL
VO
Vin Vref
0
VO
0
VC Vref
0
tO ȏ
Figure 4. Time Delay Generator
t
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LESHAN RADIO COMPANY, LTD.
TYPICAL CHARACTERISTICS CURVES
LR393
Figure 1. Supply Current vs Supply Voltage
Figure 2. Input Current vs Supply Voltage
Figure 3. Output Saturation Voltage vs Sink Current
Figure 4. Response Time for Various Input
Overdrive-Negative Transition
Figure 5. Response Time for Various Input
Overdrive-Positive Transition
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Mechanical Dimensions
LESHAN RADIO COMPANY, LTD.
LR393
DIP-8
Unit: mm
f
f
e
e e
f

e e
¶hf



0,1
f
0$;
5
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