Datasheet ALD2302SA, ALD2302PA, ALD2302DA, ALD2302ASA, ALD2302APA Datasheet (Advanced Linear Devices Inc)

ADVANCED
LINEAR
DEVICES, INC.

ALD2302A/ALD2302

DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER

GENERAL DESCRIPTION

The ALD2302A/ALD2302 are monolithic precision high performance
dual voltage comparators built with advanced silicon gate CMOS tech­nology. The primary features are: very high typical input impedance of

12

10

Ω; low input bias current of 10pA; fast response time of 180ns; very
low power dissipation of 175µA per comparator; and single (+5V) or dual
(±5V) power supply operation.

The input voltage range includes ground, which makes these compara­tors ideal for single supply low level signal detection with high source
impedance. The outputs can source and sink current allowing for
application flexibility. They can be used in either wired-OR connection
without pull-up resistor or push-pull configuration. The ALD2302A/
ALD2302 can also be used in wired-OR connection with other open
drain circuits such as the ALD2301/ALD2303 voltage comparators.

The ALD2302A/ALD2302 voltage comparators are ideal for a great
variety of applications, especially in low level signal detection circuits
which require low standby power and high output current. For quad
packages, use the ALD4302 quad voltage comparator.

APPLICATIONS

• PCMCIA instruments

• MOSFET driver

• High source impedance voltage
comparison circuits

• Multiple limit window comparator

• Power supply voltage monitor

• Photodetector sensor circuit

• High speed LED driver

• Oscillators

• Battery operated instruments

• Remote signal detection

• Multiple relay drivers

FEATURES

• Guaranteed to drive 200Ω loads

• Fanout of 30LS TTL loads

• Low supply current of 175µA each comparator

• Pinout of LM193 type industry standard
comparators

• Extremely low input bias currents -- 10pA

• Virtually eliminates source impedance effects

• Low operating supply voltage of 4V to 12V

• Single (+5V) and dual supply (±5V) operation

• High speed for both large and small signals -­180ns for TTL inputs and 400ns for 20mV
overdrive

• CMOS, NMOS and TTL compatible

• Push-pull outputs-current sourcing/ sinking

• High output sinking current -- 60mA

• Low supply current spikes

PIN CONFIGURATION

OUT

-IN

+IN

GND

1

1

2

1

3

1

4

TOP VIEW

DA, PA, SA PACKAGE

+

8

V

7

OUT

2

-IN

6

5

+IN

2

2

BENEFITS

• On-chip input and output buffers

• Precision voltage comparison capability

BLOCK DIAGRAM

• Eliminate need for second power supply

• Eliminate pull-up resistor

+

ORDERING INFORMATION

Operating Temperature Range *

-55°C to +125°C 0°C to +70°C 0°C to +70°C
8-Pin 8-Pin 8-Pin

CERDIP Small Outline Plastic Dip
Package Package (SOIC) Package

INVERTING INPUT

-IN

NONINVERTING INPUT
+IN

INVERTING INPUT

-IN

NONINVERTING INPUT
+IN

(2)

1

(3)

1

(6)

2

(5)

2

ALD2302A DA ALD2302A SA ALD2302A PA
ALD2302 DA ALD2302 SA ALD2302 PA

* Contact factory for industrial temperature range

© 1998 Advanced Linear Devices, Inc. 415 T asman Drive, Sunnyvale, California 94089 -1706 Tel: [phone] Fax: [phone] http://www .aldinc.com

(8) V

+

V

(4) GND

(1) OUT 1

(7) OUT

2

ABSOLUTE MAXIMUM RATINGS

Supply voltage, V
Differential input voltage range -0.3V to V

+

13.2V

+

+0.3V
Power dissipation 600 mW
Operating temperature range PA, SA package 0°C to +70°C

DA package -55°C to +125°C
Storage temperature range -65°C to +150°C
Lead temperature, 10 seconds +260°C

OPERATING ELECTRICAL CHARACTERISTICS

+

= 25°C V

T

A

Parameter Symbol Min Typ Max Min Typ Max Unit Conditions

Voltage V
Supply V

Supply I
Current

Voltage A
Gain

Input Offset V
Voltage 2.0 5.0 0°C ≤ T

Input Offset I

1

Current

Input Bias I

1

Current

= +5V unless otherwise specified

2302A 2302 Test

±2 ±6 ±2 ±6 V Dual Supply

4 12 4 12 V Single Supply

350 500 350 500 µARLOAD = ∞

10 100 10 100 V/mV RLOAD ≥15KΩ

0.5 1.0 1.5 4.0 mV RLOAD =1.5KΩ

10 200 10 200 pA 0°C ≤ TA ≤ 70°C

10 200 10 200 pA 0°C ≤ TA ≤ 70°C

1000 1000

S

OS

B

S
+

VD

OS

800 800

≤ 70°C

A

Common
Mode Input V
Voltage

2

Range

ICR

-0.3 V

Low Level I
Output V

OL

0.18 0.4 0.18 0.4 V V

+

-1.5 -0.3 V

+

-1.5 V

SINK

INPUT

Voltage Differential

Low Level
Output I

OL

24 60 24 60 mA V

OL

Current
High Level

Output V
Voltage

Response C

2

Time

OH

t

RP

3.5 4.5 3.5 4.5 V IOH = -2mA

=15pF

L

400 400 ns 100mV Input

Step/20mV
Overdrive

= 15pF

C

180 180 ns TTL- Level Input

L

Step

Notes:1 Consists of junction leakage currents

2

Sample tested parameters

=12mA

=1V

=1.0V

ALD2302A/ALD2302 Advanced Linear Devices 2

TYPICAL PERFORMANCE CHARACTERISTICS

SATURATION VOLTAGE

vs. TEMPERATURE

1.4

VS = ± 2.5V

1.2

I

= 50mA

SINK

1.0

0.8

0.6

0.4

0.2

SATURATION VOLTAGE (V)

0

-55 -25 0 25 50 12510075
TEMPERATURE (°C)

COMMON - MODE VOLTAGE REFERRED

TO SUPPLY VOLTAGE

0.5

V+

-0.5

-1.0

0.5

V-

-0.5

COMMON - MODE VOLTAGE LIMITS (V)

VS = ± 2.5 V

-55 -25 0 25 50 12510075

TEMPERATURE (°C)

TRANSFER FUNCTION

+6.0

TA = 25°C
V

= ±6V

S

0.0

OUTPUT VOLTAGE (V)

-6.0

-2.5

0.0

+2.5

DIFFERENTIAL INPUT VOLTAGE (mV)

RESPONSE TIME FOR VARIOUS

INPUT OVERDRIVES

0

V

V+

100

IN

INPUT

VOLTAGE (mV)

≈≈

+2.5

0.0

0V

TTL

50mV

V

+

OUT

-

V-

OUTPUT

VOLTAGE (V)

-2.5

0.0 0.1 0.2 0.40.3 0.60.5 0.7
TIME (µs)

TA = 25°C
V

= ±2.5V

S

20mV

≈≈

10mV

SATURATION VOLTAGE vs.

1.5

1.2

0.9

0.6

VOLTAGE (V)

OUTPUT SATURATION

0.3

0.0

VS = ±2.5V

0 1530456075

OUTPUT SINK CURRENT (mA)

SINK CURRENT

125°C

85°C

25°C

-25°C

-55°C

100

0

INPUT

VOLTAGE (mV)

+2.5

0.0

OUTPUT

-2.5

VOLTAGE (V)

RESPONSE TIME FOR VARIOUS

INPUT OVERDRIVES

TA = 25°C
V

= ±2.5V

S

V

V+

IN

0V

TTL

0.0 0.1 0.2 0.40.3 0.60.5 0.7

V

+

OUT

-

V-

10mV
20mV

50mV

TIME (µs)

≈≈

ALD2302A/ALD2302 Advanced Linear Devices 3

TYPICAL PERFORMANCE CHARACTERISTICS

TOTAL SUPPLY CURRENT vs.

TOTAL SUPPLY VOLTAGE

+

500

V

-

+

400

300

200

SUPPLY CURRENT (µA)

100

4.02.0

6.0

8.0

SUPPLY VOLTAGE (V)

NORMALIZED INPUT OFFSET VOLTAGE

vs. TEMPERATURE

+3

+2

+1

V

CM

V

S

T

= 25°C

A

R

=

L

10.0

= 0V

= ±2.5V

SUPPLY CURRENT vs. TEMPERATURE

550

500

∞

450

VS = ±2.5V
No Load
All comparators

400
350
300

SUPPLY CURRENT (µA)

250
200

12.0

-55

-25

025

50

100

75

125

TEMPERATURE (°C)

INPUT OFFSET VOLTAGE vs. SUPPLY

VOLTAGE REPRESENTATIVE SAMPLES

6

4

2

T

= 25°C

A

0

-1

VOLTAGE (mV)

-2

NORMALIZED INPUT OFFSET

-3

-55 -25 0 25 50 12510075
TEMPERATURE (°C)

OUTPUT HIGH VOLTAGE

+

V

-0.6

(V)

+

+

V

-0.5

+

-0.4

V

+

V

-0.3

+

-0.2

V

+

-0.1

V

+

V

OUTPUT HIGH VOLTAGE FROM V

2

vs. SUPPLY VOLTAGE

4

SUPPLY VOLTAGE (V)

TA = 25°C

IOH = -2mA

6

8

10

12

0

-2

-4

INPUT OFFSET VOLTAGE (mV)

-6
2

4

6

SUPPLY VOLTAGE (V)

OUTPUT LOW VOLTAGE

vs. SUPPLY VOLTAGE

0.6

0.5

0.4

0.3

0.2

0.1

OUTPUT LOW VOLTAGE (V)

0.0
2

4

6

SUPPLY VOLTAGE (V)

8

8

10

TA = 25°C

I

= 12mA

OL

10

12

12

ALD2302A/ALD2302 Advanced Linear Devices 4

TYPICAL APPLICATIONS

ZERO CROSSING DETECTOR

DOUBLE DUAL LIMIT WINDOW COMPARATOR

+3V

ALD2302

50K

V

V

IN

+

OUT

-5V

50K

+12V

VH

+12V

2

+

+12V

1/2 ALD2302

VH

V

MULTIPLE RELAY DRIVE

REF

V

IN

+

+5V

+5V

47K

V

VL

1

IN

1

+

+12V

+12V

+

1/2 ALD2302

VOLTAGE LEVEL TRANSLATOR

V+ = +10V

V

REF

V

IN

+

1/2 ALD2302

V

= 1.4V for TTL input

REF

+

V

V

REF

Output V

=

OUT

for CMOS input

2

swings from rail-to-rail

V

OUT

+

VL

50K

VL1 and VH1 first limit window send warning

and VH2 second limit window execute

VL

2

system cutoff

2

ALD2302

ALD2302A/ALD2302 Advanced Linear Devices 5

TYPICAL APPLICATIONS

PUSH-PULL COMPLEMENTARY POWER MOSFET DRIVER

This circuit eliminates crossover current in the
complementary power transistors. The outputs can
be used to source and sink different loads or tied
together to provide push-pull drive of the same load.

1/2 ALD 2302

+

V

V

REF

V

IN

+

+12V

+12V

10K

V

1

V

IN

40K

V

2

+

+12V

+

10K

TIME DELAY GENERATOR

+

V

R

F1

R

R

T

C

T

F2

R

F3

ALD2302

1/2 ALD 2302

+

1/2 ALD 2302

+

1/2 ALD 2302

+12V

P- Channel VP 02
Power MOSFET

2A Source

2A Sink

N - Channel VN 01
Power MOSFET

V

1

V

2

V

3

+

R

F4

Design & Operating Notes:

1. As each output sources up to 10mA in the output high state, the output stage of a wired - OR low output circuit must be able to sink this current and still
provide desired output voltage levels. For TTL output levels, this consideration limits the number to a maximum of three ALD2302 outputs wired-OR
together.

2. In order to minimize stray oscillation, all unused inputs must be tied to ground.

3. The input bias and offset currents are essentially input protection diode reverse bias leakage currents, and are typically less than 1 pA at room
temperature. The currents are a function of ambient temperature, and would have to be considered in applications where very high source impedance
or high accuracy are involved.

4. The high output sinking current of 60mA for each output offers flexibility in many applications, as a separate buffer or driver would not be necessary to
drive the intended load. However, as the circuit normally operates close to ambient temperature due to its very low power consumption, thermal effects
caused by large output current transients must be considered in certain applications.

ALD2302A/ALD2302 Advanced Linear Devices 6