ANALOG DEVICES ADCMP350, ADCMP352, ADCMP354 Service Manual

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Comparators and Reference Circuits

ADCMP350/ADCMP352/ADCMP354/ADCMP356

FEATURES

Comparators with 0.6 V on-chip references
Output stages:

Open-drain active-low (ADCMP350)
Push-pull active-low (ADCMP352)
Open-drain active-high (ADCMP354)
Push-pull active-high (ADCMP356)

High voltage (up to 22 V) tolerance on V

and open-drain

IN

output pins
Low power consumption (10 µA)
10 nA input bias current
15 mV hysteresis
5 µs propagation delay
Specified over −40°C to +125°C temperature range
4-lead SC70 package

APPLICATIONS

Voltage detectors
Microprocessor systems
Computers
Battery monitors
Intelligent instruments
Portable equipment

FUNCTIONAL BLOCK DIAGRAMS

ADCMP350/ADCMP352

REF

V

IN

ADCMP354/ADCMP356

V

IN

REF

V

GND

V

GND

CC

CC

Figure 1.

OUT (OD/PP)

OUT (OD/PP)

04745-001

`

GENERAL DESCRIPTION

The ADCMP350/ADCMP352/ADCMP354/ADCMP356 parts
are comparator and reference circuits suitable for use in
general-purpose applications. The high voltage input and
output structures will allow voltages of up to 22 V on the input
of all devices and the output of the open-drain devices. High
performance over the −40°C to +125°C temperature range
makes them suitable for use in automotive and other thermally
harsh applications, while low power consumption and space­efficient SC70 packaging make them ideal for battery-powered
portable equipment.

Table 1. Selection Table

Part No. Reference Voltage (V) Input Connection Output

ADCMP350 0.6 Inverting Open Drain
ADCMP352 0.6 Inverting Push-Pull
ADCMP354 0.6 Noninverting Open Drain
ADCMP356 0.6 Noninverting Push-Pull

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
Fax: [phone] © 2004 Analog Devices, Inc. All rights reserved.

www.analog.com

ADCMP350/ADCMP352/ADCMP354/ADCMP356

TABLE OF CONTENTS

Specifications..................................................................................... 3

Applications........................................................................................9

Absolute Maximum Ratings............................................................ 4

ESD Caution.................................................................................. 4

Pin Configuration and Function Descriptions............................. 5

Typical Performance Characteristics ............................................. 6

REVISION HISTORY

10/04—Revision 0: Initial Version

Adding Hysteresis..........................................................................9

Volt a ge D e te c tor ............................................................................9

Outline Dimensions ....................................................................... 10

Ordering Guide .......................................................................... 10

Rev. 0 | Page 2 of 12

ADCMP350/ADCMP352/ADCMP354/ADCMP356

SPECIFICATIONS

VCC = Full operating range, TA = –40°C to +125°C, unless otherwise noted.

Table 2.

Parameter Min Typ Max Unit Test Conditions/Comments

SUPPLY

VCC Operating Voltage Range 2.25 5.5 V
VIN Operating Voltage Range 0 22 V
Supply Current 10 15 µA

VIN THRESHOLD RISING 0.579 0.6 0.621 V VCC = 3.3V, TA = −40°C to +85°C

0.579 0.6 0.624 V VCC = 3.3V, TA = −40°C to +125°C
VIN THRESHOLD FALLING 0.564 0.585 0.606 V VCC = 3.3V, TA = −40°C to +85°C

0.564 0.585 0.609 V VCC = 3.3V, TA = −40°C to +125°C
INPUT BIAS CURRENT 10 nA VIN = 0.6 V
170 µA VIN = 22 V
THRESHOLD TEMPERATURE COEFFICIENT 30 ppm/°C
VIN TO OUT DELAY 5 µs VIN = VTH to (VTH − 100 mV)
OUT VOLTAGE LOW 0.4 V VIN < VTH min, I
OUT VOLTAGE HIGH 0.8 × V

OUTPUT RISE TIME 30 ns Cout = 15 pF
OUTPUT FALL TIME 45 ns Cout = 15 pF
OUTPUT LEAKAGE CURRENT 1 µA OUT = 22 V, open drain only

V

CC

> VTH max, I

V

IN

Push-pull only

= 1.2 mA

SINK

SOURCE

= 500 µA,

Rev. 0 | Page 3 of 12

ADCMP350/ADCMP352/ADCMP354/ADCMP356

ABSOLUTE MAXIMUM RATINGS

TA = 25°C, unless otherwise noted.

Table 3.

Parameter Rating

V

CC

V

IN

OUT (Open Drain) −0.3 V to +25 V
OUT (Push-Pull) −0.3 V to (VCC + 0.3 V)
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −65°C to +150°C
θJA Thermal Impedance, SC70 146°C/W
Lead Temperature

Soldering (10 sec) 300°C

Vapor Phase (60 sec) 215°C

Infrared (15 sec) 220°C

−0.3 V to +6 V

−0.3 V to +25 V

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or
any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

Rev. 0 | Page 4 of 12

ADCMP350/ADCMP352/ADCMP354/ADCMP356

G

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

V

1

IN

ADCMP350/
ADCMP352/
ADCMP354/
ADCMP356

ND OUT

Figure 2. Pin Configuration

4

V

CC

32

04745-002

Table 4. Pin Function Descriptions

Pin No. Mnemonic Description

1 V

IN

Monitors Analog Input Voltage. Connected to inverting or noninverting input, depending on model number.
2 GND Ground.
3 OUT Digital Output. Open-drain or push-pull options, depending on model number.
4 V

CC

Power Supply.

Rev. 0 | Page 5 of 12

ADCMP350/ADCMP352/ADCMP354/ADCMP356

TYPICAL PERFORMANCE CHARACTERISTICS

11.0

10.5
TA +25°C

10.0

TA+125°C

9.5

9.0

(µA)

CC

I

8.5

8.0

7.5

7.0

2.25 2.55 2.85 3.15 3.45 5.55

TA+85°C

TA–40°C

3.75 4.05 4.35 4.65 4.95 5.25
V

(V)

CC

Figure 3. ICC vs. VCC over Temperature.

05112-003

20

18

16

14

A)

µ

12

10

8

6

SUPPLY CURRENT (

4

2

0

02468 22

10 12 14 16 18 20

V

(V)

IN

Figure 6. Supply Current vs. Input Voltage

05112-006

700

680

660

640

620

V

TRIP RISING

TRIP

600

(mV)

TRIP

V

V

580

560

540

520

500

–40 –25 –10 5 20 35 50 65 80 95 110 125

TRIP FALLING

TRIP

TEMPERATURE (°C)

Figure 4. VIN Trip Threshold vs. Temperature.(VCC = 3.3V)

20

18

16

HYSTERESIS

14

12

10

8

HYSTERESIS (mV)

6

4

2

0

–40 –25 –10 5 20 35 50 65 80 95 110 125

TEMPERATURE (°C)

Figure 5. VIN Trip Hysteresis vs. Temperature

05112-004

05112-005

200

180

160

140

120

100

80

IN LEAKAGE (µA)

60

40

20

0

02468 22

T

TA = +125°C

10 12 14 16 18 20

(V)

V

IN

= +85°C

A

= +25°C

T

A

T

= –40°C

A

Figure 7. Input Leakage vs. Input Voltage

1.0

0.9

0.8

0.7

0.6

0.5

0.4

LEAKAGE (µA)

IN

V

0.3

0.2

0.1

0

0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3

Figure 8. V

Leakage Current vs. VIN Voltag e (VCC = 3.8 V)

IN

(V)

V

IN

TA = 25°C

05112-007

05112-019

Rev. 0 | Page 6 of 12

ADCMP350/ADCMP352/ADCMP354/ADCMP356

200

190

180

170

160

150

140

IN LEAKAGE (µA)

130

120

110

100

2.25 2.55 2.85 3.15 3.45 5.55

TA = +125°C

T

= +85°C

A

TA = +25°C

T

= –40°C

A

3.75 4.05 4.35 4.65 4.95 5.25
V

(V)

CC

Figure 9. Input Leakage vs. Supply Voltage (VIN = 22 V)

700

680

660

640

(mV)

TRIP

V

620

600

580

560

540

520

500

V

RISING

TRIP

V

FALLING

TRIP

2.25 2.55 2.85 3.15 3.45 5.55

3.75 4.05 4.35 4.65 4.95 5.25
V

(V)

CC

Figure 10. VIN Trip T hres hold vs. VCC

05112-009

05112-008

10000

T

= +25°C

A

1000

T

= +85°C

100

TA = +125°C

10

OUTPUT VOLTAGE (mV)

1

0.1

0.01 0.1 10

A

T

= –40°C

A

OUTPUT SINK CURRENT (mA)

1

Figure 12. Output Voltage vs. Output Sink Current (Isink = 500 mA)

120

100

80

60

40

OUTPUT LOW VOLTAGE (mV)

20

0

2.25 2.40 2.70 3.00 3.30 5.50

3.60 3.90 4.20 4.50 4.80 5.20

SUPPLY VOLTAGE (V)

Figure 13. Output Low Voltage vs. Supply Voltage (Isink = 500 mA)

05112-010

05112-011

20

18

16

14

12

10

8

HYSTERESIS (mV)

6

4

2

0

2.25 2.55 2.85 3.15 3.45 5.55

Figure 11. V

HYSTERESIS

3.75 4.05 4.35 4.65 4.95 5.25
V

(V)

CC

Trip Hysteresis vs. VCC

IN

05112-020

Rev. 0 | Page 7 of 12

200

180

160

140

120

100

80

FALL TIME (ns)

60

40

20

0

2.25 2.40 2.70 3.00 3.30 5.50

3.60 3.90 4.20 4.50 4.80 5.20

SUPPLY VOLTAGE (V)

RISE TIME

FALL TIME

Figure 14. Fall Time vs. Supply Voltage

05112-012

ADCMP350/ADCMP352/ADCMP354/ADCMP356

100

90

80

70

60

50

40

30

20

SHORT-CIRCUIT SINK CURRENT (mA)

10

0

2.25 2.40 2.70 3.00 3.30 5.50

Figure 15. Short-Circuit Sink Current vs. Supply Voltage

(V

25

3.60 3.90 4.20 4.50 4.80 5.20

SUPPLY VOLTAGE (V)

= 3.3, PUSH-PULL Only)

cc

05112-013

1

CH1 = VIN

CH2 = VOUT

2

CH1 20mV/DIV CH2 1.00V/DIV TIMEBASE: 10µs/DIV

Figure 17. Propagation Delay Timing, 10 mV Overdrive

05112-015

20

s)

µ

15

10

PROPAGATION DELAY (

5

0

t

PLH

t

PHL

10 80 90 100 110 130

INPUT OVERDRIVE (mV)

120706050403020

05112-014

Figure 16. Propagation Delay vs. Input Overdrive ( Vcc = 3.3, PUSH-PULL Only)

CH1 = VIN

1

CH2 = VOUT

2

CH1 100mV/DIV CH2 1.00V/DIV TIMEBASE: 10µs/DIV

Figure 18. Propagation Delay Timing, 100 mV Overdrive

05112-016

Rev. 0 | Page 8 of 12

ADCMP350/ADCMP352/ADCMP354/ADCMP356

(

APPLICATIONS

ADDING HYSTERESIS

To prevent oscillations at the output caused by noise or slowly
moving signals passing the switching threshold, positive
feedback can be used to add hysteresis to the noninverting parts
(ADCMP354 and ADCMP356).

For the noninverting configuration shown in Figure 19, two
resistors are used to create different switching thresholds,
depending on whether the input signal is increasing or
decreasing in magnitude. When the input voltage is increasing,
the threshold is above V
threshold is below V

The upper input threshold level is given by

V

IN_HI

where V

= 0.6 V.

REF

The lower input threshold level is given by

, and when it’s decreasing, the

REF

.

REF

V

=

IN_LO

()

REF

REF

=

R2

R2

−+

+

R2R1V

R1VR2R1V

CC

)

VOLTAGE DETECTOR

The ADCMP35x parts can be used to monitor voltages, such as
battery monitoring or threshold detectors. Using a resistor
divider at the input to select the appropriate trip voltage, the
comparator can be configured to give a logic output when the
input passes that threshold. Figure 20 shows the typical
configuration of the ADCMP354 for monitoring a supply to
indicate that the voltage is above a certain level.

V

= 5V

CC

ADM331

ADCMP354

V

IN

R1

R1

V

= 0.6V

REF

V

IN

Figure 20. Voltage Detector Application

OUT

R

PULLUP

05112-018

The hysteresis is the difference between these voltage levels and
is given by

R1V

CC

V

=∆

IN

R2

V

= 5V

CC

ADM331

ADCMP354

V

= 0.6V

REF

V

V

IN

IN

R1

R2

Figure 19. Noninverting Comparator Configuration with Hysteresis

OUT

R

PULLUP

R

LOAD

05112-017

Rev. 0 | Page 9 of 12

ADCMP350/ADCMP352/ADCMP354/ADCMP356

OUTLINE DIMENSIONS

2.20

1.35

1.15

PIN 1

0.65 BSC

1.80

4

1

3

2

*

0.50 BSC

2.40

1.80

0.70

0.50

1.10

0.80

SEATING
PLANE

0.18

0.10

0.30

0.10

1.00

0.80

0.10 MAX

0.30

0.15

0.10 COPLANARITY

*

PACKAGE OUTLINE CORRESPONDS IN FULL TO EIAJ SC82
EXCEPT FOR WIDTH OF PIN-2 AS SHOWN

Figure 21. 4-Lead Thin Shrink Small Outline Transistor Package [SC70]

(EIAJ SC82 body)

(KS-4)

Dimensions shown in millimeters

ORDERING GUIDE

Model Temperature Range Package Description Branding Package Option

ADCMP350YKS-REEL7 –40°C to +125°C 4-Lead SC70 M0Z KS-4
ADCMP352YKS-REEL7 –40°C to +125°C 4-Lead SC70 M11 KS-4
ADCMP354YKS-REEL7 –40°C to +125°C 4-Lead SC70 M13 KS-4
ADCMP356YKS-REEL7 –40°C to +125°C 4-Lead SC70 M15 KS-4

Rev. 0 | Page 10 of 12

ADCMP350/ADCMP352/ADCMP354/ADCMP356

NOTES

Rev. 0 | Page 11 of 12

ADCMP350/ADCMP352/ADCMP354/ADCMP356

NOTES

© 2004 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.

D05112-0-10/04(0)

Rev. 0 | Page 12 of 12