Diodes AS331 User Manual

Data Sheet

LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331

General Description

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.

Features

· Wide Supply Voltage Range

- Single Supply: 2V to 36V

- Dual Supplies: ±1V to ±18V

· Low Supply Current at V

· 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

=5V: 0.4mA

CC

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

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Data Sheet

LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331

Pin Configuration

K Package

(SOT-23-5)

INPUT-

INPUT+

Figure 2. Pin Configuration of AS331 (Top View)

Functional Block Diagram

GND

1

5

VCC

2

34

VCC

5

OUTPUT

INPUT+

INPUT-

GND

3

Q1

1

2

Q2 Q3

Q5

Q6

Q4

Q7

Q8

4

OUTPUT

Figure 3. Functional Block Diagram of AS331

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Data Sheet

LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331

Ordering Information

AS331 -

E1: Lead Free

Circuit Type

G1: Green

Package

TR: Tape and Reel

K: SOT-23-5

Package

SOT-23-5

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.

Temperature

Range

-40 to 85

o

C

Lead Free Green Lead Free Green

AS331KTR-E1 AS331KTR-G1 EEA GEA Tape & Reel

Part Number Marking ID

Packing

Typ e

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Supply Voltage

Differential Input Voltage

Input Voltage

Input Current (V

Output Short-circuit Current to Ground Continuous

<-0.3V) (Note 2) I

IN

V

CC

V

ID

V

IN

IN

40 V

40 V

-0.3 to 40 V

50 mA

Power Dissipation (T

Operating Junction Temperature

Storage Temperature

Lead Temperature (Soldering, 10sec)

=25oC)

A

T

T

LEAD

P

T

STG

D

J

620 mW

150

-65 to 150

260

o

C

o

C

o

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 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

o

25

C).

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Data Sheet

LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Supply Voltage

Operating Ambient Temperature Range

V

CC

T

A

236V

-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 Symbol Conditions Min Typ Max Unit

Input Offset Voltage

Input Bias Current

Input Offset Current

Input Common Mode
Voltage Range (Note 4)

Supply Current

Voltage Gain

Large Signal Response
Time

Response Time

Output Sink Current

Output Leakage Current

Saturation Voltage

V

OS

I

B

I

IO

I

CC

G

V

I

SINKVIN

I

LEAK

V

SAT

V

=1.4V, VCC=5 to 30V

OUT

IIN+ or IIN- with output in linear range,

=0V

V

CM

IIN+-IIN-, VCM=0V

V

=30V

CC

=5V 0.4 1.0

V

CC

RL=∞

=30V 0.5 1.7

V

CC

VCC=15V, RL≥15kΩ, V

V

=TTL Logic Swing, RL=5.1kΩ

IN

=5.1kΩ

R

L

-=1V, VIN+=0V, V

VIN-=0V, VIN+=1V, V

V

-=0V, VIN+=1V, V

IN

VIN-=1V, VIN+=0V, I

OUT

OUT

OUT

OUT

SINK

=1 to 11V

=1.5V

=5V

=30V

≤4mA

0

50 200 V/mV

2 0 0 n s

6.0 16 mA

15

7.0

mV

25 250

400

550

200

VCC-1.5

2.0

mA

3.0

1.3 µs

0.1 nA

1 µA

200 400

500

mV

nA

nA

V

Note 3: These specifications are limited to -40oC≤T

o

≤85

C. Limits over temperature are guaranteed by design, but

A

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

both inputs can go to +36V without damages, independent of the magnitude of the V

-1.5V (at 25
.

CC

o

C), but either or

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Data Sheet

LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331

Typical Performance Characteristics

0.6

0.5

0.4

0.3

0.2

Supply Current (mA)

0.1

TC=-40oC

TC=25oC

TC=85oC

0.0

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30

Supply Voltage (V)

Figure 4. Supply Current vs. Supply Voltage

1.1

1.0

0.9

RL=5.1KΩ

VCC=5V

VCC=30V

0.60

0.55

VCC=5V

VCC=30V

0.50

0.45

0.40

0.35

Supply Current (mA)

0.30

0.25

0.20

-40-200 20406080100120

Case Temperature (oC)

Figure 5. Supply Current vs. Case Temperature

350

VCC=5V

I

=4mA

300

SINK

0.8

0.7

0.6

Input Offset Voltage (mV)

0.5

0.4

-40-20 0 20406080100120

Case Temperature (oC)

250

200

Saturation Voltage (mV)

150

100

-40-20 0 20406080100120

Case Temperature (oC)

Figure 7. Saturation Voltage vs. Case TemperatureFigure 6. Input Offset Voltage vs. Case Temperature

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Data Sheet

LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331

Typical Performance Characteristics (Continued)

6

VCC=5V

5

TC=25oC

4

3

2

Saturation Voltage (V)

1

0

0 2 4 6 8 10 12 14 16 18 20 22

Output Sink Current (mA)

Figure 8. Saturation Voltage vs. Output Sink Current

900

VCC=5V,GND=0V, RL=5.1KΩ

Input Overdrive Voltage=100mV

800

700

600

500

Response Time (nS)

400

300

0 20406080100120140

Load Capacitor (pF)

Low to High
High to Low

600

VCC=5V, Input Overdrive Voltage=100mV

550

500

450

400

350

Response Time (nS)

300

250

200

-40-200 20406080100120

Low to High
High to Low

Case Temperature (oC)

Figure 9. Response Time vs. Case Temperature

2.0

1.8

1.6

1.4

1.2

1.0

0.8

Response Time (nS)

0.6

0.4

0.2
0 20406080100

Input OverdrIve Voltage (mV)

Low to High
High to Low

VCC=5V, GND=0V

RL=5.1KΩ

Figure 10. Response Time vs. Load Capacitor

Figure 11. Response Time vs. Input Overdrive Voltage

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Data Sheet

LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331

Typical Performance Characteristics (Continued)

Response Time (nS)

Figure 12.

Input

1.8

RL=5.1KΩ

1.6

Input Overdrive Voltage=5mV

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0
0 5 10 15 20 25 30

Low to High
High to Low

Supply Voltage (V)

Response Time vs. Supply Voltage

20mV

10mV

5mV

Output

1.8

RL=5.1KΩ

1.6

Input Overdrive Voltage=100mV

1.4

1.2

1.0

0.8

0.6

Response Time (nS)

0.4

0.2

0.0
0 5 10 15 20 25 30

Low to High
High to Low

Supply Voltage (V)

Figure 13. Response Time vs. Supply Voltage

100mV

20mV 10mV

Input Overdrive
Voltage=5mV

Output

Input

Input Overdrive Voltage=100mV

V

=5V, RL=5.1KΩ

V

=5V, RL=5.1KΩ

CC

Figure 14. Response Time for Positive Transition

CC

Figure 15. Response Time for Negative Transition

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Data Sheet

LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331

Typical Performance Characteristics (Continued)

Input

VCC=15V

V

=5V

CC

Output

Input Overdrive Voltage=100mV

Figure 16. Response Time for Positive Transition

Input

Output

Output

VCC=15V

=5V

V

CC

Input

Input Overdrive Voltage=100mV

Figure 17. Response Time for Negative Transition

Input

=5V, RL=5.1KΩ

V

CC

Figure 19. 100kHz Response

Output

V

=5V, RL=5.1KΩ

CC

Input Overdrive Voltage=5mV

Figure 18. 100kHz Response

Output

Input Overdrive Voltage=100mV

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

=5V, RL=5.1KΩ

V

CC

Output

Input Overdrive Voltage=100mV

Figure 20. 500kHz Response

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Data Sheet

LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331

Typical Application

V

CC

5V

VIN+

+

AS331

+

V

REF

-

Figure 21. Basic Comparator

V

VIN+

REF

3KΩ

V

OUT

V

CC

+

AS331

-

+

100KΩ

V

OUT

Figure 22. Driving CMOS

V

CC

4.3KΩ

1MΩ

10KΩ

100KΩ

100pF

V

+

IN

1MΩ

-

AS331

V

OUT

75pF

-

AS331

V

OUT

+

+

0.001µF

1MΩ

Figure 23. One Shot Multivibrator

100KΩ

V

IN

100KΩ

Figure 24. Squarewave Oscillator

100KΩ

May. 2010 Rev. 1. 4 BCD Semiconductor Manufacturing Limited

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Data Sheet

LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331

Mechanical Dimensions

Unit: mm(inch)SOT-23-5

2.820(0.111)

3.020(0.119)

)

)

4

2

2

1

0

0

.

.

0

)

)

9

)

)

4

6

0

1

1

1

.

.

0

0

(

(

0

0

5

5

6

9

.

.

2

2

7

5

6

0

0

.

.

0

0

(

(

0

0

0

0

5

7

.

.

1

1

0.200(0.008)

0

(

(

0

0

0

0

6

3

.

.

0

0

0.100(0.004)

0.200(0.008)

0.950(0.037)

P

Y

T

)
7
5
0

.

X

0

A

(
0

M

5
4

.
1

1.800(0.071)

2.000(0.079)

0.300(0.012)

0.400(0.016)

0

0

0

0

0

9

.

.

1

0

0

3

0

0

7

.

0

R

0

(

0

0

0

.

0

(

0

5

1

.

5

3

0

(

0

.

)

)

1

5

0

.

0

(

)

8

2

0

.

0

(

F

E

0°

8°

)

0

0

0

.

)

6

0

0

.

May. 2010 Rev. 1. 4 BCD Semiconductor Manufacturing Limited

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BCD Semiconductor Manufacturing Limited

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particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use

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