Data Sheet
LOW POWER LOW OFFSET VOLTAGE DUAL COMPARATORS
General Description
The AS393/393A consist of two independent precision
voltage comparators with a typical offset voltage of
1.0mV and high gain. They are specifically designed to
operate from a single power supply over wide range of
voltages. Operation from split power supply is also
possible and the low power supply current drain is
independent of the magnitude of the power supply
voltage.
The AS393/393A series are compatible with industry
standard 393. AS393A has more stringent input offset
voltage than AS393.
The AS393 is available in standard DIP-8, SOIC-8
TSSOP-8 packages, AS393A is available in standard
DIP-8 and SOIC-8 packages.
AS393/393A
Features
·
Wide Supply Voltage Range
- Single Supply: 2.0V to 36V
- Dual Supplies:
±1.0V
to
±18V
Low Supply Current Drain: 0.6mA
Low Input Bias Current: 25nA (Typical)
Low Input Offset Current:
±5.0nA
(Typical)
Low Input Offset Voltage: 1.0mV (Typical)
Input Common Mode Voltage Range Includes
Ground
Differential Input Voltage Range Equals to the
Power Supply Voltage
Low Output Saturation Voltage: 200mV at 4mA
Open Collector Output
·
·
·
·
·
·
·
·
Applications
·
·
·
·
·
·
Battery Charger
Cordless Telephone
Switching Power Supply
DC-DC Module
PC Motherboard
Communication Equipment
SOIC-8
DIP-8
TSSOP-8
Figure 1. Package Types of AS393/393A
Aug. 2006 Rev. 1.6
BCD Semiconductor Manufacturing Limited
1
Data Sheet
LOW POWER LOW OFFSET VOLTAGE DUAL COMPARATORS
Pin Configuration
M /P/G Package
SOIC-8/DIP-8/TSSOP-8
OUTPUT1
INPUT1-
INPUT1+
GND
1
2
3
4
8
7
7
6
5
V
CC
OUTPUT 2
INPUT 2-
INPUT 2+
AS393/393A
Figure 2. Pin Configuration of AS393/393A (Top View)
Functional Block Diagram
V
CC
Q2
+INPUT
Q1
Q3
Q4
-INPUT
Q7
OUTPUT
Q8
Q5
Q6
Figure 3. Functional Block Diagram of AS393
/393A
(Each comparator)
Ordering Information
AS393
Circuit Type
Blank: AS393
A: AS393A
-
E1: Lead Free
Blank: Tin Lead
TR: Tape and Reel
Blank: Tube
Package
M: SOIC-8
P: DIP-8
G: TSSOP-8
Aug. 2006 Rev. 1.6
BCD Semiconductor Manufacturing Limited
2
Data Sheet
LOW POWER LOW OFFSET VOLTAGE DUAL COMPARATORS
Ordering Information (Continued)
Temperature
Range
Part Number
Tin Lead
AS393M
SOIC-8
-40 to 85
o
C
DIP-8
AS393MTR
Lead Free
AS393M-E1
AS393MTR-E1
AS393AM-E1
AS393AMTR-E1
AS393P
AS393P-E1
AS393AP-E1
AS393G-E1
AS393GTR-E1
AS393P
Marking ID
Tin Lead
AS393M
AS393M
Lead Free
AS393M-E1
AS393M-E1
AS393AM-E1
AS393AM-E1
AS393P-E1
AS393AP-E1
EG3C
EG3C
AS393/393A
Package
Packing Type
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tube
Tube
Tape & Reel
TSSOP-8
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Absolute Maximum Ratings (Note 1)
Parameter
Supply Voltage
Differential Input Voltage
Input Voltage
Input Current (V
IN
< -0.3V) (Note 2)
Output Short-Circuit Current to Ground
DIP-8
Power Dissipation (T
A
=25
o
C)
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
P
D
T
J
T
STG
T
LEAD
SOIC-8
TSSOP-8
150
-65 to 150
260
Symbol
V
CC
V
ID
V
IN
I
IN
Value
40
40
-0.3 to 40
50
Continuous
780
660
570
o
C
o
C
o
Unit
V
V
V
mA
mW
C
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Max-
imum Ratings" for extended periods may affect device reliability.
Note 2: This input current will only exist when the voltage at any of the input leads is driven negative. It is due to
the collector-base junction of the input PNP transistors becoming forward biased and thereby acting as input diode
clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action on the IC chip. This
transistor action can cause the output voltages of the comparators to go to the V+ voltage level (or to ground for a
large overdrive) for the time duration that an input is driven negative. This is not destructive and normal output
states will re-establish when the input voltage, which was negative, again returns to a value greater than -0.3 V
DC
(at 25
o
C).
Aug. 2006 Rev. 1.6
BCD Semiconductor Manufacturing Limited
3
Data Sheet
LOW POWER LOW OFFSET VOLTAGE DUAL COMPARATORS
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Temperature Range
Symbol
V
CC
T
A
Min
2
-40
Max
36
85
Unit
V
o
C
AS393/393A
Electrical Characteristics
Limits in standard typeface are for T
A
=25
o
C,
bold
typeface applies over T
A
=-40
o
C to 85
o
C (Note 3), V
CC
=5V, GND=0V,
unless otherwise specified.
Parameter
Conditions
AS393
Input Offset Voltage
V
O
=1.4V, R
S
=0Ω,
V
CC
=5V to 30V
AS393A
Min
Typ
1.0
1.0
25
5.0
Max
5.0
7
3.0
5
Input Bias Current
Input Offset Current
Input Common Mode
Voltage Range (Note 4)
I
IN
+ or I
IN
- with output in Linear Range,
V
CM
=0V
I
IN
+-I
IN
-, V
CM
=0V
V
CC
=30V
V
CC
=5V
Supply Current
R
L=
∞
V
CC
=30V
50
0
0.6
0.7
250
400
50
200
V
CC
-1.5
1.0
2
1.7
3
Voltage Gain
Large Signal Response
Time
Response Time
Output Sink Current
Output LeackageCurrent
V
CC
=15V, R
L
≥15kΩ,
V
O
=1V to 11V
V
IN
=TTL Logic Swing, V
REF
=1.4V,
V
RL
=5V, R
L
=5.1k
V
RL
=5V, R
L
=5.1K
V
IN
-=1V, V
IN
+=0, V
O
=1.5V
V
IN
-=0V, V
IN
+=1V, V
O
=5V
V
IN
-=0V, V
IN
+=1V, V
O
=30V
V
IN
-=1V, V
IN
+=0, I
SINK
≤4mA
200
6.0
200
200
1.3
16
0.1
1
400
500
V/mV
ns
µs
mA
nA
µA
mV
mA
nA
nA
V
mV
Unit
Saturation Voltage
Note 3: These specifications are limited to -40
o
C
≤
T
A
≤85
o
C. Limits over temperature are guaranteed by design,
but not tested in production.
Note 4: The input common-mode voltage of either input signal voltage should not be allowed to go negatively by
more than 0.3V (at 25
o
C
). The upper end of the common-mode voltage range is V
CC
-1.5V (at 25
o
C
), but either or
both inputs can go to +18V without damages, independent of the magnitude of the V
CC
.
Aug. 2006 Rev. 1.6
BCD Semiconductor Manufacturing Limited
4
Data Sheet
LOW POWER LOW OFFSET VOLTAGE DUAL COMPARATORS
Typical Performance Characteristics
AS393/393A
1.0
0.9
100
90
Input Bias Current (nA)
0.8
80
70
60
50
40
30
20
10
0
0.0
Supply Current (mA)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
5
10
15
20
25
30
35
40
Ta=-40 C
o
Ta=0 C
o
Ta=25 C
o
Ta=70 C
o
Ta=85 C
o
-40 C
o
0 C
o
25 C
o
70 C
o
85 C
o
5.0
10.0
15.0
20.0
25.0
30.0
Supply Voltage (V)
Supply Voltage (V)
Figure 4. Supply Voltage vs. Supply Current
Figure 5. Supply Voltage vs. Input Bias Current
Output Voltage (V)
Input Voltage (mV)
10
6
4
2
0
0
V
CC
Vo-Saturation Voltage (V
DC
)
1
85 C
o
70 C
o
25 C
o
-40 C
o
0.1
-50
5.1K
V
IN
_
V
OUT
+
0.01
-100
1E-3
10m
100m
1
10
100
I
O
-Output Sink Current (mA)
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Time (µs)
Figure 6. Output Sink Current vs. Saturation Voltage
Figure 7. Response Time for 5mV Input Overdrive -
Negative Transition
Aug. 2006 Rev. 1.6
BCD Semiconductor Manufacturing Limited
5
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