ADM705AR Datasheet ADM705ANZ, ADM707ARZ-REEL, ADM705ARZ-REEL | P10-P12

ADM705/ADM706/ADM707/ADM708 Data Sheet

Rev. H | Page 10 of 12

APPLICATIONS INFORMATION

A typical application circuit is shown in Figure 18. The un-

regulated dc input supply is monitored using PFI via the resistive

divider network. Resistor R1 and Resistor R2 must be selected

so when the supply voltage drops below the desired level (such

as 8 V), the voltage on PFI drops below the 1.25 V threshold,

thereby generating an interrupt to the microprocessor. Monitoring

the preregulator input provides additional time to execute an

orderly shutdown procedure before power is lost.

TO 15V

INPUT

POWER

MICROPROCESSOR

1.25V

PFI

PFO

ADP3367

–

00088-020

RESET

INTERRUPT

RESET

ADM705/ADM706/

ADM707/ADM708

Figure 18. Typical Application Circuit

Microprocessor activity is monitored using WDI. This is driven

using an output line from the processor. The software routines

toggle this line at least once every 1.60 seconds. If a problem occurs

and this line is not toggled,

WDO

goes low and a nonmaskable

interrupt is generated. This interrupt routine can clear the problem.

If, in the event of inactivity on the WDI line, a system reset is

required,

WDO

must connect to

as shown in Figure 19.

ADM705/

ADM706

RESET

GND

I/O LINE

MICROPROCESSOR

WDI

WDO

RESET

00088-021

Figure 19.

RESET

From

WDO

MONITORING ADDITIONAL SUPPLY LEVELS

It is possible to use the power fail comparator to monitor a

second supply as shown in Figure 20. The two sensing resistors,

R1 and R2, are selected so the voltage on PFI drops below 1.25 V at

the minimum acceptable input supply.

PFO

can connect to

a reset is generated when the supply drops out of tolerance. In

this case, if either supply drops out of tolerance, a reset is generated.

ADM705/

ADM706

RESET

GND

PFI

PFO

RESET

00088-022

MICROPROCESSOR

Figure 20. Monitoring 5 V and an Additional Supply, V

MICROPROCESSOR WITH BIDIRECTIONAL RESET

To prevent contention for microprocessors with a bidirectional

reset line, a current limiting resistor must be inserted between

the ADM705/ADM706/ADM707/ADM708

RESET

output pin

and the microprocessor

RESET

pin. This limits the current to a

safe level if there are conflicting output reset levels. A suitable

resistor value is 4.7 kΩ. If the reset output is required for other

uses, it must be buffered, as shown in Figure 21.

ADM70x

RESET

GND

RESET

GND

BUFFERED

RESET

00088-023

MICROPROCESSOR

Figure 21. Bidirectional Input/Output

RESET

Data Sheet ADM705/ADM706/ADM707/ADM708

Rev. H | Page 11 of 12

OUTLINE DIMENSIONS

COMPLIANT TO JEDEC STANDARDS MS-001-BA

0.022 (0.56)

0.018 (0.46)

0.014 (0.36)

SEATING

PLANE

0.015

(0.38)

MIN

0.210

(5.33)

MAX

PIN 1

0.150 (3.81)

0.130 (3.30)

0.115 (2.92)

0.070 (1.78)

0.060 (1.52)

0.045 (1.14)

0.280 (7.11)

0.250 (6.35)

0.240 (6.10)

0.100 (2.54)

BSC

0.400 (10.16)

0.365 (9.27)

0.355 (9.02)

0.060 (1.52)

MAX

0.430 (10.92)

MAX

0.014 (0.36)

0.010 (0.25)

0.008 (0.20)

0.325 (8.26)

0.310 (7.87)

0.300 (7.62)

0.195 (4.95)

0.130 (3.30)

0.115 (2.92)

0.015 (0.38)

GAUGE

PLANE

0.005 (0.13)

MIN

CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS

(IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR

REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.

CORNER LEADS MAY BE CONFIGURED AS WHOLE OR HALF LEADS.

Figure 22. 8-Lead Plastic Dual-in-Line Package [PDIP]

Narrow Body

(N-8)

Dimensions shown in inches and (millimeters)

0.25 (0.0098)

0.17 (0.0067)

1.27 (0.0500)

0.40 (0.0157)

0.50 (0.0196)

0.25 (0.0099)

× 45

8°

0°

1.75 (0.0688)

1.35 (0.0532)

SEATING

PLANE

0.25 (0.0098)

0.10 (0.0040)

8 5

5.00 (0.1968)

4.80 (0.1890)

4.00 (0.1574)

3.80 (0.1497)

1.27 (0.0500)

BSC

6.20 (0.2440)

5.80 (0.2284)

0.51 (0.0201)

0.31 (0.0122)

COPLANARITY

0.10

CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS

(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR

REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.

COMPLIANT TO JEDEC STANDARDS MS-012-AA

Figure 23. 8-Lead Standard Small Outline Package [SOIC_N]

(R-8)

Dimensions shown in millimeters and (inches)

ADM705/ADM706/ADM707/ADM708 Data Sheet

Rev. H | Page 12 of 12

COMPLIANT TO JEDEC STANDARDS MO-187-AA

6°

0°

0.80

0.55

0.40

0.65 BSC

0.40

0.25

1.10 MAX

3.20

3.00

2.80

COPLANARITY

0.10

0.23

0.09

3.20

3.00

2.80

5.15

4.90

4.65

PIN 1

IDENTIFIER

15° MAX

0.95

0.85

0.75

0.15

0.05

10-07-2009-B

Figure 24. 8-Lead Mini Small Outline Package [MSOP]

(RM-8)

Dimensions shown in millimeters

ORDERING GUIDE

Model

Temperature Range Package Description Package Option Branding

ADM705AN −40°C to +85°C 8-Lead Plastic Dual-in-Line Package [PDIP] N-8

ADM705ANZ −40°C to +85°C 8-Lead Plastic Dual-in-Line Package [PDIP] N-8

ADM705AR −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM705AR–REEL −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM705AR–REEL7 −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM705ARZ −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM705ARZ–REEL −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM705ARZ–REEL7 −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM706ANZ

−40°C to +85°C

8-Lead Plastic Dual-in-Line Package [PDIP]

N-8

ADM706AR −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM706AR-REEL −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM706AR-REEL7 −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM706ARZ −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM706ARZ-REEL

−40°C to +85°C

8-Lead Standard Small Outline Package [SOIC_N]

R-8

ADM706ARZ-REEL7 −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM707ANZ −40°C to +85°C 8-Lead Plastic Dual-in-Line Package [PDIP] N-8

ADM707AR −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM707AR-REEL −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM707ARZ −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM707ARZ-REEL −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM708ANZ −40°C to +85°C 8-Lead Plastic Dual-in-Line Package [PDIP] N-8

ADM708AR −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM708AR-REEL −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM708ARZ −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM708ARZ-REEL −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8

ADM708ARMZ −40°C to +85°C 8-Lead Mini Small Outline Package [MSOP] RM-8 M8F

ADM708ARMZ-REEL −40°C to +85°C 8-Lead Mini Small Outline Package [MSOP] RM-8 M8F

Z = RoHS Compliant Part.

registered trademarks are the property of their respective owners.

D00088-0-1/16(H)

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