Diodes AP331A User Manual

AP331A

SINGLE DIFFERENTIAL COMPARATOR

Features

• Wide supply Voltage range: 2.0V to 36V Single or dual supplies: ±1.0V to ±18V

• Very low supply current drain (0.4mA) – independent of supply voltage

• Low input biasing curr ent: 150nA

• Low input offset current: ±70nA

• Low input offset voltage: ±4mV

• Input common-mode voltage ra nge includes ground

• Differential input voltage range equal to the power

supply voltage

• Low output saturation voltage: 250mV at 4mA

• Output voltage compatible with TTL, DTL, ECL, MOS

and CMOS logic systems

• SOT25 and SOT25R: Available in “Green” Molding Compound (No Br, Sb)

• Lead Free Finish/ RoHS Compliant ( Note 1)

Applications

• High precision comparators

• Reduced V

• Eliminates need for dual supplies

• Allows sensing near ground

• Compatible with all forms of logic

• Power drain suitable for battery operation

drift over temperature

OS

Ordering Information

General Description

The AP331A is a precision voltage comparators with an offset voltage specification as low as 8.0 mV max for comparator 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 pow er sup ply voltage. Th e comparator 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, square wave and time delay gene rators; wide range VCO; MOS clock timers; multivibrators and high voltage digital logic gates. The AP331A is designed to directly interface with TTL and CMOS. When operated from both plus and minus power supplies, the AP331A will directly interface with MOS logic where their low power drain is a distinct advantage over standard comparators.

AP331A XX G - 7

Package

W : SOT25

Lead Free

G : Green

WR : SOT25R

Device

AP331AWG-7 AP331AWRG-7

Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html

2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf

Package

Code

W SOT25

WR SOT25R

AP331A Rev. 2 1 of 13 FEBRUARY 2009

Packaging

(Note 2)

Quantity Part Number Suffix

3000/Tape & Reel -7 3000/Tape & Reel -7

.

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Packing

7 : Tape & Reel

7” Tape and Reel

SINGLE DIFFERENTIAL COMPARATOR

Pin Assignments

(1) SOT25 (2) SOT25R

( Top View )

AP331A

( Top View )

IN-

1

GND

2

IN+

5

43

Vcc

Output

Pin Descriptions

Pin Name

IN- 1 3 Input-

GND 2 2 Ground

IN+ 3 1 Input+

Output 4 4 Output

Vcc 5 5 Power Supply

SOT25

Pin No.

SOT25R

Block Diagram

IN+

1

GND

2

IN-

Description

5

43

Vcc

Output

+

V

100μA3.5μA100μA3.5μA

Q2 Q3

+INPUT

-INPUT

AP331A Rev. 2 2 of 13 FEBRUARY 2009

Q1

Q4

Q6

Q7Q8

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OUTPUT

Q5

r

(+)

(-)

AP331A

SINGLE DIFFERENTIAL COMPARATOR

Absolute Maximum Ratings

Symbol Paramete

VCC Supply Voltage 40 V VIN

Differential Input Voltage (Note 10)

VIN Input Voltage -0.3 to +40 V

ICC PD

Input Current (V Power Dissipation (Note 3)

-0.3V) (Note 5)

IN

SOT25 SOT25R

Output Short-Circuit to Ground (Note 4) Continuous

TJ Operating Junction T emperature Range+150

TST Storage Temperature Range -65 to +150

Recommended Operating Conditions

Symbol Paramete

VCC Supply Voltage (Single) +2 +36 V VCC Supply Voltage (Dual Supplies, V+ VS GND) ±1 ±18 V VIN VIN

Differential Input Voltage (Single) (Note 10) Differential Input Voltage (Dual Supplies) (Note 10)

TA Operating Ambient Temperature 0 70

Electrical Characteristics

= 5V, T

(V

CC

Symbol Parameter Conditions Min Typ. Max Unit

V

OFFSET

I

BIAS

I

OFFSET

ICC Supply Current RL = ∞

I

O(Sink)

V

SAT

I

O(Leak)

AP331A Rev. 2 3 of 13 FEBRUARY 2009

= 25oC, unless otherwise stated)

A

Input Offset Voltage

Input Bias Current

Input Offset Current I

Input Common Mode Voltage Range

Voltage Gain

Large Signal Response Time

Response Time

Output Sink Current

Saturation Voltage

Output Leaka ge Current

(Note 11)

I

(+) or IIN(-) with Output In

IN

Linear Range, V

CM

= 0V

(Note 7)

-I

V

IN

+

= 30V (Note 8)

V

= 0V - 70 150 nA

CM

+

= 5V - 0.4 1

V V+ = 36V - 1 2. 5

R

> 15kΩ, V+ = 15V

L

V

= 1V to 11V

O

= TTL Logic Swing,

V

IN

V

= 1.4V, V

REF

R

= 5.1kΩ

L

= 5V, RL = 5.1kΩ

V

RL

= 5V,

RL

(Note 9) V

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

IN

< 1.5V

V

O

V

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

IN

< 4mA

I

SINK

V

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

IN

= 5V

V

O

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Rating Unit

40 V 50 mA

740 mW

o

C

o

C

Min Max Unit

0 ±36 V

-18 +18 V

o

C

- 4.0 8.0 mV

- 150 400 nA

0 - V

+

-1.5 V mA

50 200 - V/mV

- 300 - ns

- 1.3 - μs

6.0 16 - mA

- 250 400 mV

- 0.1 - nA

(+)

(-)

A

T

AP331A

SINGLE DIFFERENTIAL COMPARATOR

Electrical Characteristics

( V

= 5V ) ( Note 6 )

CC

Symbol Parameter Conditions Min Typ. Max Unit

V

Input Offset Voltage (Note 11) - - 9 mV

OFFSET

I

Input Offset Current I

OFFSET

I

Input Bias Current

BIAS

Input Common Mode Voltage Range

V

Saturation Voltage

SAT

I

Output Leakage Current

O(Leak)

Differential Input Voltage

θ

Notes: 3. The maximum power dissipation is a function of T

4. Short circuits from the output to V

5. 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 di ode actio n, there is also lateral NP N parasitic transist or acti on o n the IC chip. This transistor action can cause the output

6. The AP331A temperature specifications are limited to 0°C <

7. The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent

8. The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3V. The

9. The response time specified is for a 100mV input step with 5mV overdrive. For larger overdrive signals 300ns can be

10. Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the

11. At output switch point, V

12. Test condition for SOT25 and sot25R: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.

Thermal Resistance

JA

Junction-to-Ambient

hermal Resistance

JC

Junction-to-Case

P

= (T

D

ground, the maximum output current is approximately 20mA independent of the magnitude of V

voltages of the comparators to go to the V 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.

of the state of the output so no loading change exists on the reference or input lines.

upper end of the common-mode voltage range is V independent of the magnitude of V

obtained, see typical performance characteristics section.

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).

at 25°C.

-TA)/ θJA . All numbers apply for packages soldered directly onto a PC board.

J(MAX)

+

can cause excessive heating and eventual destruction. When considering short circuits to

+

.

~ 1.4V, RS=0Ω with V+ from 5V to 30V; and over the full input common-mode range (0V to V+-1.5V),

O

J(MAX)

+

voltage level (or to ground for a large overdrive) for the time duration that an input

-I

, V

IN

(+) or IIN(-) with Output In

I

IN

Linear Range, V

= 0V - - 200 n

CM

= 0V

- - 500 nA

(Note 7)

+

=30V (Note 8)

V

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

V

IN

SINK

< 4mA V

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

IN

V

= 30V

O

Keep All V

’s > 0V (or V-, if

IN

Used), (Note 10) SOT25 (Note 12) SOT25R (Note 12) SOT25 (Note 12) SOT25R (Note 12)

, θJA. The maximum allowable power dissipation at any ambient temperature is

TOP < +70°C.

+

-1.5V at 25°C, but either or both inputs can go to 36V without damage,

0 - V

- - 700 mV

- - 1.0 μA

- - 36 V 173

37

+

.

+

-2.0 V

o

C/W

o

C/W

AP331A Rev. 2 4 of 13 FEBRUARY 2009

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AP331A

SINGLE DIFFERENTIAL COMPARATOR

Application Information

The AP331A is high gain, wide bandwidth devices, like most comparators, can easily oscillate if the output lead is inadvertently allowed to capacitively couple to the inputs via stray capacitance. This shows up only during the output voltage transition intervals as the comparator change states. Power supply bypassing is not required to solve this problem. Standard PC board layout is helpful as it reduces stray input-output coupling. Reducing the input resistors to < 10kΩ reduces the feedback signal levels and finally, adding even a small amount (1.0 to 10 mV) of positive feedback (hysteresis) causes such a rapid transition that oscillations due to stray feedback are not possible. Simply socketing the IC and attaching resistors to the pins will cause input-output oscillations during the small transition intervals unless hysteresis is used. If the input signa l is a pulse wav eform, with relativ ely fast rise and fall time s, hystere sis is not required. All input pins of any unused comparators should be tied to the negative supply.

The bias network of the AP331A establishes a drain current independent of the magnitude of the power supply voltage over the range of from 2.0 V

The differential input voltage may be larger than V+ without damaging the device (Note 10). Protection should be provided to prevent the input voltages from going negative more than -0.3 V applications section.

The output of the AP331A is the uncommitted collector of a grounded-emitter NPN output transistor. Many collectors can be tied together to provide an output OR’ing function. An output pull-up resistor can be connected to any available power supply voltage within the permitted supply voltage range and there is no restriction on this voltage due to the magnitude of the voltage applied to the

+

terminal of the AP331A package. The output can also be used as a simple SPST switch to ground (when a pull-up resistor i s not used).

V The amount of current the output device can sink is limited by the drive available (which is independent of V When the maximum current limit is reached (approx imately 16mA ), the output transistor will come o ut of saturation and the out put voltage will rise very rapidly. The output saturation voltage is limited by the approximate ly 60Ω r of the output transistor (1.0 mV) allows the output to clamp essentially to ground level for small load currents.

Typical Circuit ( V

to 30 VDC. It is usually unnecessary to use a bypass capacitor across the power supply line.

DC

(at 25°C). An input clamp diode can be used as shown in the

DC

of the output transistor. The low offset voltage

SAT

CC

= 5.0V

)

DC

+

V

+5.0V

+

) and the β of this device.

DC

3.0K

V

O

+

100K

+V

REF

IN

+

-

1/4 MM54CXX

AP331A Rev. 2 5 of 13 FEBRUARY 2009

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Typical Circuit (Continued) (V

= 5.0V

CC

DC

AP331A

SINGLE DIFFERENTIAL COMPARATOR

)

+

V

FREQUENCY

+V

CONTROL

VOLTAGE

INPUT

200K

0.1µF

100K

-

AP331A

2.0K

V 0

+

V

O

+

200K

CRYSTAL

f=100KHz

Crystal Controlled Oscillator

+

V

100K

10

C

0.1µF

20K

50K

-

AP331A

+

20K

500pF

-

3.0K

5.1K

0.01µF

V+/2

100K

+

AP331A

-

+

V

3.0K

OUTPUT1

OUTPUT2

AP331A

+

Two-Decade High Frequency VCO

+

V

+V

REF

-

AP331A

10K

IN

+

10M

3K

V

O

Non-Inverting Comparator with

Hysteresis

AP331A Rev. 2 6 of 13 FEBRUARY 2009

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Typical Circuit (Continued) (V

CC

= 5.0V

DC

AP331A

SINGLE DIFFERENTIAL COMPARATOR

)

V

0

A

B

C

+

V

0

"0" "1"

+

A

"0" "1"

B C D

ALL DIODES 1N914

39K

+0.375V

100K

100K 100K

10K

D1 D2

D3 D4

1K

100K

+

V

-

AP331A

+

AND Gate

-

AP331A

+

V

3K

200K

+0.075V

V

0

A B C

+

"0" "1"

100K

100K 100K

f

-

1K

AP331A

+

1K

3K

f

Or Gate

+

V

2R

R4 3K

+V

REF HI

V

OUT

+V

S

+

AP331A

-

R

S

IN

+

AP331A

2R

S

+V

REF LOW

-

V+ (12VDC)

10K

LAMP

12 ESB

2N2222

Large Fan-in AND Gate

Limit Comparator

AP331A Rev. 2 7 of 13 FEBRUARY 2009

Typical Circuit (Continued)

(V

= 5.0VDC)

CC

AP331A

SINGLE DIFFERENTIAL COMPARATOR

+

V

+

AP331A

3.0K V

O

-

+

AP331A

-

ORing the Outputs

+

V

100K 100K

V

IN

5.1K5.1K

-

1N914

5.1K

AP331A

+ 0

t

0

100pF

V

O

1N914

1M

+

20M

10K

1M

-

AP331A

+

V

0.001µF

1N914

10K

1ms

V

O

+

PW

t0t

V

0

1

Zero Crossing Detector

(Single Power Supply)

One-Shot Multivibrator

AP331A Rev. 2 8 of 13 FEBRUARY 2009

Typical Circuit (Continued)

(V

= 5.0VDC)

CC

AP331A

SINGLE DIFFERENTIAL COMPARATOR

AP331A Rev. 2 9 of 13 FEBRUARY 2009

φ

Split-Supply Applications

+

(V

= +15VDC and V- = -15 VDC)

AP331A

SINGLE DIFFERENTIAL COMPARATOR

+

V

51K

+

-

50pF

10K

AP331A

5.1K

3.9K2K

-

V

-

AP331A

+

2K8.2K

+

AP331A

-

6.8K

2.4K

A

AP331A

B

MOS Clock Driver

AP331A Rev. 2 10 of 13 FEBRUARY 2009

Typical Characteristics

Supply Current Input Current

Response Time for Various Input Overdrives—Negative Transition

AP331A

SINGLE DIFFERENTIAL COMPARATOR

Response Time for Various Input

Overdrives—Positive Transition

Output Saturation Voltage

AP331A Rev. 2 11 of 13 FEBRUARY 2009

Marking Information

(1) SOT25 and SOT25R

AP331A

SINGLE DIFFERENTIAL COMPARATOR

( Top View )

W X

7

4

XX

: Identification code

: Year 0~9

Y

: Week : A~Z : 1~26 week;

W

a~z : 27~52 week; z represents 52 and 53 week

X

: A~Z : Green

5

XX

Y

1 2 3

Part Number Package Identification Code

AP331A SOT25 R9 AP331A SOT25R R3

Package Information (All Dimensions in mm)

(1) Package Type: SOT25 and SOT25R

AP331A Rev. 2 12 of 13 FEBRUARY 2009

AP331A

SINGLE DIFFERENTIAL COMPARATOR

IMPORTANT NOTICE

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.

LIFE SUPPORT

Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.

AP331A Rev. 2 13 of 13 FEBRUARY 2009