AP393
Low Power Low Offset Voltage Dual Comparators
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 1.0 Sep 7, 2004
1/13
Features
- Wide supply
Voltage range: 2.0V to 36V
Single or dual supplies: 1.0V to 18V
- Very low supply current drain (0.4 mA)
independent of supply voltage
- Low input biasing current: 25 nA
- Low input offset current: 5 nA
- Maximum offset voltage: 3 mV
- Input common-mode voltage range includes
ground
- Differential input voltage range equal to the power
supply voltage
- Low output saturation voltage: 250 mV at 4 mA
- Output voltage compatible with TTL, DTL, ECL,
MOS and CMOS logic systems
- 8-pin PDIP and SOP Pb-Free packages
Advantages
- High precision comparators
- Reduced V
OS
drift over temperature
- Eliminates need for dual supplies
- Allows sensing near ground
- Compatible with all forms of logic
- Power drain suitable for battery operation
Pin Assignment
General Description
The AP393 consists of two independent precision
voltage comparators with an offset voltage
specification as low as 2.0 mV max for two
comparators which were designed specifically to
operate from a single power supply over a wide
range of voltages. 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. 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.
Application areas include limit comparators, simple
analog to digital converters; pulse, squarewave and
time delay generators; wide range VCO; MOS clock
timers; multivibrators and high voltage digital logic
gates. The AP393 is designed to directly interface
with TTL and CMOS. When operated from both
plus and minus power supplies, the AP393 will
directly interface with MOS logic where their low
power drain is a distinct advantage over standard
comparators.
SOP-8L/PDIP-8L
1
2
3
4
5
6
7
8
(Top View)
INVERTING INPUT 1
GND
AP393
NON-INVERTING INPUT 1
OUTPUT 2
OUTPUT 1
V
+
INVERTING INPUT 2
NON-INVERTING INPUT 2
Pin Descriptions
Pin Name
Pin
No.
Description
OUTPUT 1
1
Channel 1 Output
INVERTING
INPUT 1
2
Channel 1 Negative Input
NON-INVERT
ING INPUT 1
3
Channel 1 Positive Input
GND 4
Ground
Pin Name
Pin
No.
Description
NON-INVERT
ING INPUT 2
5
Channel 2 Positive Input
INVERTING
INPUT 2
6
Channel 2 Negative Input
OUTPUT 2
7
Channel 2 Output
V
+
8
Vcc
AP393
Low Power Low Offset Voltage Dual Comparators
Anachip Corp.
www.anachip.com.tw Rev. 1.0 Sep 7, 2004
3/13
Absolute Maximum Ratings
(Note 10)
Symbol
Parameter
Rating
Unit
V
CC
Supply
Voltage
36
V
V
IN
Differential Input Voltage
(Note 8)
36
V
V
IN
Input Voltage
-0.3 to +36
V
I
CC
Input Current (V
IN
-0.3V)
(Note 3)
50
mA
Molded DIP
780
Metal Can
660
P
D
Power
Dissipation
(Note 1)
Small Outline Package
510
mW
Output Short-Circuit to Ground
(Note 2)
Continuous
T
OP
Operating Temperature Range
0 to +70
o
C
T
ST
Storage Temperature Range
-65 to +150
o
C
T
Lead
Lead Temperature Range (Soldering, 10 sec)
+260
o
C
PDIP Soldering (10 sec)
+260
Vapor Phase (60 sec)
+215
Soldering Information
SOP
Infrared (15 sec)
+220
o
C
ESD
rating
(1.5k in with 100pF)
1300
V
Electrical Characteristics
(V
CC
=5V, T
A
=25
o
C, unless otherwise stated)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
OFFSET
Input Offset Voltage
(Note 9)
- 1.0 5.0
mV
I
BIAS
Input
Bias
Current
I
IN
(+) or I
IN
(-) with Output In
Linear Range, V
CM
=0V
(Note 5)
- 25
250
nA
I
OFFSET
Input Offset Current
I
IN
(+) - I
IN
(-) V
CM
=0V -
5.0
50
nA
Input Common Mode Voltage Range V
+
=30V
(Note 6)
0
-
V
+
-1.5
V
V
+
=5V -
0.4
1
I
CC
Supply
Current
R
L
=
V
+
=36V -
1
2.5
mA
Voltage
Gain
R
L
> 15k, V
+
=15V
V
O
=1V to 11V
50 200 - V/mV
Large Signal Response Time
V
IN
=TTL Logic Swing,
V
REF
=1.4V, V
RL
=5V, R
L
=5.1k
- 300 - ns
Response
Time
V
RL
=5V, R
L
=5.1k
(Note 7)
- 1.3 - s
I
O(Sink)
Output
Sink
Current
V
IN
(-)=1V, V
IN
(+)=0, V
O
<1.5V
6.0 16 - mA
V
SAT
Saturation
Voltage
V
IN
(-)=1V, V
IN
(+)=0, I
SINK
<
4mA
- 250
400
mV
I
O(Leak)
Output Leakage Current
V
IN
(-)=0, V
IN
(+)=1V, V
O
=5V - 0.1 - nA
Electrical Characteristics
(V
CC
=5V)
(Note 4)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
OFFSET
Input Offset Voltage
(Note 9)
- - 9
mV
I
OFFSET
Input Offset Current
I
IN
(+) -I
IN
(-), V
CM
=0V -
-
150
nA
I
BIAS
Input
Bias
Current
I
IN
(+) or I
IN
(-) with Output In
Linear Range, V
CM
=0V
(Note 5)
- -
400
nA
Input Common Mode Voltage Range V
+
=30V
(Note 6)
0
-
V
+
-2.0
V
V
SAT
Saturation
Voltage
V
IN
(-)=1V, V
IN
(+)=0, I
SINK
<
4mA
- -
700
mV
I
O(Leak)
Output Leakage Current
V
IN
(-)=0, V
IN
(+)=1V, V
O
=30V - - 1.0
A
Differential
Input
Voltage
Keep All V
IN
's > 0V (or V
-
, if
Used),
(Note 8)
- - 36
V
AP393
Low Power Low Offset Voltage Dual Comparators
Anachip Corp.
www.anachip.com.tw Rev. 1.0 Sep 7, 2004
4/13
Note 1: For operating at high temperatures, the AP393 must be derated based on a 125C maximum junction temperature and a
thermal resistance of 170C/W which applies for the device soldered in a printed circuit board, operating in a still air ambient.
The AP393 must be derated based on a 150C maximum junction temperature. The low bias dissipation and the "ON-OFF"
characteristic of the outputs keeps the chip dissipation very small (P
D
<100 mW), provided the output transistors are allowed
to saturate.
Note 2: Short circuits from the output to V
+
can cause excessive heating and eventual destruction. When considering short circuits to
ground, the maximum output current is approximately 20 mA independent of the magnitude of V
+
.
Note 3: 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 is negative,
again returns to a value greater than -0.3V.
Note 4: The AP393 temperature specifications are limited to 0C < T
A
< +70C.
Note 5: The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent
of the state of the output so no loading change exists on the reference or input lines.
Note 6: The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3V. The
upper end of the common-mode voltage range is V
+
-1.5V at 25C, but either or both inputs can go to 36V without damage,
independent of the magnitude of V
+
.
Note 7: The response time specified is for a 100 mV input step with 5 mV overdrive. For larger overdrive signals 300 ns can be
obtained, see typical performance characteristics section.
Note 8: Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the
common-mode range, the comparator will provide a proper output state. The low input voltage state must not be less than
-0.3V (or 0.3V below the magnitude of the negative power supply, if used).
Note 9: At output switch point, V
O
~ 1.4V, R
S
=0 with V
+
from 5V to 30V; and over the full input common-mode range (0V to V
+
-1.5V),
at 25C.
Note 10: Refer to RETS193AX for AP393 military specifications.
Typical Circuit
(V
CC
=5.0V
DC
)
V
O
3.0K
V
+
+V
IN
+V
REF
Basic Comparator
+
-
AP393
Driving CMOS
+
-
+5.0V
DC
100K
AP393
1/4 MM54CXX
Driving TTL
+
-
AP393
1/4 DM54XX
+5V
DC
10K
+
-
V
O
100K
100K
100K
100K
75 pF
4.3K
V
+
V
+
V
+
Squarewave Oscillator
1:100kHz
1/2 AP393
0
AP393
Low Power Low Offset Voltage Dual Comparators
Anachip Corp.
www.anachip.com.tw Rev. 1.0 Sep 7, 2004
5/13
Typical Circuit (Continued)
(V
CC
=5.0V
DC
)
Pulse Generator
+
-
V
O
100K
1M
1M
1M
80 pF
15K
V
+
+15V
DC
1M
R2
R1
1N914
D1
1N914
D2
60s
6s
-V
+
0
t
O
t
1
t
2
*For large ratios of R1/R2, D1 can
be omitted
1/2 AP393
*
Crystal Controlled Oscillator
+
-
V
O
200K
0.1F
2.0K
V
+
V
+
100K
200K
0
CRYSTAL
f=100KHz
1/2 AP393
+
-
+
-
+
-
+V
C
FREQUENCY
CONTROL
VOLTAGE
INPUT
0.1F
10
20K
20K
50K
V
+
/2
OUTPUT2
OUTPUT1
500pF
V
+
0.01F
3.0K
5.1K
100K
3.0K
V
+
Two-Decade High Frequency VCO
V
+
/2
1/2 AP393
1/2 AP393
1/2 AP393
100K
V
O
3.0K
V
+
+V
IN
+V
REF
Basic Comparator
+
-
V*=+30V
DC
+250mV
DC
< V
C
< +50V
DC
700Hz < f
O
< 100KHz
1/2 AP393
Non-Inverting Comparator with
Hysteresis
V
O
3K
V
+
+V
IN
+V
REF
+
-
10M
10K
1/2 AP393
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