BCDSEMI AS331_10

Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
General Description
Features
The AS331 consists of a single precision voltage comparator with a typical input offset voltage of 1.0mV
and high voltage gain. It is 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 AS331 is available in standard SOT-23-5 package.
·
·
·
AS331
Wide Supply Voltage Range
- Single Supply: 2V to 36V
- Dual Supplies: ±1V to ±18V
Low Supply Current at VCC=5V: 0.4mA
Low Input Bias Current: 25nA (Typical)
Low Input Offset Current:5nA (Typical)
Low Input Offset Voltage: 1mV (Typical)
Input Common Mode Voltage Range Includes
Ground
Differential Input Voltage Range Equals to the
Power Supply Voltage
Low Output Saturation Voltage at 4mA: 200mV
(Typical)
Open Collector Output
Applications
·
·
·
·
·
·
Battery Charger
Cordless Telephone
Switching Power Supply
DC-DC Module
PC Motherboard
Communication Equipment
SOT-23-5
Figure 1. Package Type of AS331
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
1
Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
AS331
Pin Configuration
K Package
(SOT-23-5)
INPUT-
1
GND
2
INPUT+
3
5
VCC
4
OUTPUT
Figure 2. Pin Configuration of AS331 (Top View)
Functional Block Diagram
VCC
5
INPUT+
INPUT-
3
Q2
Q3
Q1
Q4
4
1
OUTPUT
Q8
Q7
Q6
Q5
GND
2
Figure 3. Functional Block Diagram of AS331
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
2
Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
AS331
Ordering Information
AS331
E1: Lead Free
G1: Green
Circuit Type
TR: Tape and Reel
Package
K: SOT-23-5
Package
Temperature
Range
SOT-23-5
-40 to 85oC
Part Number
Lead Free
AS331KTR-E1
Green
AS331KTR-G1
Marking ID
Lead Free
EEA
Packing
Type
Green
GEA
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green package.
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
Supply Voltage
VCC
40
V
Differential Input Voltage
VID
40
V
Input Voltage
VIN
-0.3 to 40
V
Input Current (VIN<-0.3V) (Note 2)
IIN
50
mA
Output Short-circuit Current to Ground
Continuous
Power Dissipation (TA=25oC)
PD
620
Operating Junction Temperature
TJ
150
o
TSTG
-65 to 150
o
TLEAD
260
Storage Temperature
Lead Temperature (Soldering, 10sec)
mW
C
C
oC
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 Maximum 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 -0.3V (at
25oC).
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
AS331
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Ambient Temperature Range
Symbol
Min
Max
Unit
VCC
2
36
V
TA
-40
85
o
C
Electrical Characteristics
VCC=5V, GND=0V, TA=25oC, unless otherwise specified. Bold typeface applies over TA=-40 to 85oC (Note 3)
Parameter
Input Offset Voltage
Symbol
VOS
Conditions
Min
VOUT=1.4V, VCC=5 to 30V
IB
IIN+ or IIN- with output in linear range,
VCM=0V
Input Offset Current
IIO
IIN+-IIN-, VCM=0V
Supply Current
1
5
25
250
400
5
50
200
VCC=30V
ICC
Max
7.0
Input Bias Current
Input Common Mode
Voltage Range (Note 4)
Typ
VCC-1.5
0
VCC=5V
0.4
VCC=30V
0.5
mV
nA
nA
V
1.0
2.0
RL=∞
Unit
1.7
mA
3.0
Voltage Gain
GV
VCC=15V, RL≥15kΩ, VOUT=1 to 11V
50
200
V/mV
Large Signal Response
Time
VIN =TTL Logic Swing, RL=5.1kΩ
200
ns
Response Time
RL=5.1kΩ
1.3
µs
16
mA
0.1
nA
Output Sink Current
ISINK
Output Leakage Current
ILEAK
Saturation Voltage
VSAT
VIN-=1V, VIN+=0V, VOUT=1.5V
VIN-=0V, VIN+=1V, VOUT=5V
6.0
VIN-=0V, VIN+=1V, VOUT=30V
VIN-=1V, VIN+=0V, ISINK≤4mA
1
200
400
500
µA
mV
Note 3: These specifications are limited to -40oC≤TA≤85oC. 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 25oC). The upper end of the common mode voltage range is VCC-1.5V (at 25oC), but either or
both inputs can go to +36V without damages, independent of the magnitude of the VCC.
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
AS331
Typical Performance Characteristics
0.60
0.6
VCC=5V
0.55
VCC=30V
Supply Current (mA)
Supply Current (mA)
0.5
0.4
0.3
0.2
o
TC=-40 C
0.45
0.40
0.35
0.30
o
TC=25 C
0.1
0.50
o
TC=85 C
0.25
0.0
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
0.20
-40
30
-20
0
60
80
100
120
Case Temperature ( C)
Figure 4. Supply Current vs. Supply Voltage
Figure 5. Supply Current vs. Case Temperature
350
RL=5.1KΩ
VCC=5V
VCC=5V
1.0
VCC=30V
0.9
Saturation Voltage (mV)
Input Offset Voltage (mV)
40
o
Supply Voltage (V)
1.1
20
0.8
0.7
0.6
300
ISINK=4mA
250
200
150
0.5
0.4
-40
-20
0
20
40
60
80
100
100
-40
120
-20
0
20
40
60
80
100
120
o
o
Case Temperature ( C)
Case Temperature ( C)
Figure 6. Input Offset Voltage vs. Case Temperature
Figure 7. Saturation Voltage vs. Case Temperature
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
AS331
Typical Performance Characteristics (Continued)
6
600
VCC=5V
o
VCC=5V, Input Overdrive Voltage=100mV
Low to High
High to Low
550
TC=25 C
Response Time (nS)
Saturation Voltage (V)
5
4
3
2
500
450
400
350
300
1
250
0
0
2
4
6
8
10
12
14
16
18
20
200
-40
22
-20
0
20
40
60
80
100
120
o
Case Temperature ( C)
Output Sink Current (mA)
Figure 9. Response Time vs. Case Temperature
Figure 8. Saturation Voltage vs. Output Sink Current
2.0
900
VCC=5V,GND=0V, RL=5.1KΩ
1.8
Input Overdrive Voltage=100mV
Response Time (nS)
Response Time (nS)
RL=5.1KΩ
1.6
800
700
600
Low to High
High to Low
500
VCC=5V, GND=0V
1.4
1.2
1.0
Low to High
High to Low
0.8
0.6
400
300
0.4
0.2
0
20
40
60
80
100
120
140
0
20
40
60
80
100
Input OverdrIve Voltage (mV)
Load Capacitor (pF)
Figure 10. Response Time vs. Load Capacitor
Figure 11. Response Time vs. Input Overdrive Voltage
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
AS331
Typical Performance Characteristics (Continued)
1.8
1.8
RL=5.1KΩ
1.6
Input Overdrive Voltage=100mV
1.4
Response Time (nS)
Response Time (nS)
1.4
1.2
Low to High
High to Low
1.0
0.8
0.6
1.2
1.0
0.6
0.4
0.2
0.2
0.0
0
5
10
15
20
25
30
0
5
10
15
20
25
30
Supply Voltage (V)
Supply Voltage (V)
Figure 13. Response Time vs. Supply Voltage
Figure 12. Response Time vs. Supply Voltage
20mV
Low to High
High to Low
0.8
0.4
0.0
RL=5.1KΩ
1.6
Input Overdrive Voltage=5mV
10mV 5mV
Output
100mV 20mV 10mV Input Overdrive
Voltage=5mV
Input
Input
Output
Input Overdrive Voltage=100mV
VCC=5V, RL=5.1KΩ
VCC=5V, RL=5.1KΩ
Figure 15. Response Time for Negative Transition
Figure 14. Response Time for Positive Transition
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
AS331
Typical Performance Characteristics (Continued)
Input
VCC=15V
Output
VCC=5V
Output
VCC=5V
Input
Output
Input Overdrive Voltage=100mV
Input Overdrive Voltage=100mV
Figure 17. Response Time for Negative Transition
Figure 16. Response Time for Positive Transition
Input
Input
VCC=5V, RL=5.1KΩ
VCC=5V, RL=5.1KΩ
Output
VCC=15V
Output
Input Overdrive Voltage=5mV
Input Overdrive Voltage=100mV
Figure 19. 100kHz Response
Figure 18. 100kHz Response
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
AS331
Typical Performance Characteristics (Continued)
Input
VCC=5V, RL=5.1KΩ
Output
Input Overdrive Voltage=100mV
Figure 20. 500kHz Response
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
AS331
Typical Application
VCC
5V
VIN+
3KΩ
VIN+
+
100KΩ
+
VOUT
AS331
VOUT
AS331
-
VREF+
-
VREF+
Figure 22. Driving CMOS
Figure 21. Basic Comparator
VCC
VCC
4.3KΩ
100KΩ
1MΩ
10KΩ
100pF
VIN+
75pF
-
-
1MΩ
AS331
VOUT
VOUT
AS331
+
+
100KΩ
100KΩ
0.001µF
VIN
100KΩ
1MΩ
Figure 24. Squarewave Oscillator
Figure 23. One Shot Multivibrator
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
10
Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR
AS331
Mechanical Dimensions
SOT-23-5
Unit: mm(inch)
0.300(0.012)
0.600(0.024)
1.500(0.059)
1.700(0.067)
0.100(0.004)
0.200(0.008)
2.950(0.116)
2.650(0.104)
2.820(0.111)
3.020(0.119)
0.200(0.008)
0.700(0.028)
REF
0.300(0.012)
0.400(0.016)
0°
8°
1.800(0.071)
2.000(0.079)
0.000(0.000)
MAX
1.450(0.057)
0.950(0.037)
TYP
0.150(0.006)
0.900(0.035)
1.300(0.051)
May. 2010 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
11
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