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

.

.

www.diodes.com © Diodes Incorporated

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

www.diodes.com © Diodes Incorporated

OUTPUT

Q5

r

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

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

www.diodes.com © Diodes Incorporated

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

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

IN

(+) or IIN(-) with Output In

I

IN

Linear Range, V

= 0V - - 200 n

CM

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

www.diodes.com © Diodes Incorporated