ADM690AARNZ Analog Devices Inc, ADM690AARNZ Datasheet

ADM690AARNZ

Manufacturer Part Number

ADM690AARNZ

Description

IC SUPERVISOR MPU 4.65 WD 8SOIC

Manufacturer

Analog Devices Inc

Type

Battery Backup Circuitr

Datasheet

1.ADM690AARNZ.pdf (8 pages)

Specifications of ADM690AARNZ

Number Of Voltages Monitored

Output

Push-Pull, Totem Pole

Reset

Active Low

Reset Timeout

140 ms Minimum

Voltage - Threshold

4.65V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

8-SOIC (3.9mm Width)

Threshold Voltage

4.65V

No. Of Supervisors / Monitors

Supply Voltage Range

1V To 5.5V

Reset Type

Active-Low

Supply Current

1.95mA

Delay Time

200ms

Digital Ic Case Style

SOIC

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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GENERAL DESCRIPTION

The ADM690A/ADM692A/ADM802L/M/ADM805L/M

family of supervisory circuits offers complete single chip

solutions for power supply monitoring and battery control

functions in microprocessor systems. These functions include

failure warning.

The ADM690A/ADM692A/ADM802L/M/ADM805L/M are

available in 8-pin packages and provide:

1. Power-on reset output during power-up, power-down and

2. Battery backup switching for CMOS RAM, CMOS

3. A reset pulse if the optional watchdog timer has not been

4. A 1.25 V threshold detector for power fail warning, low battery

On the ADM690A/ADM802L/ADM805L the reset voltage

threshold is 4.65 V. On the ADM692A/ADM802M/

ADM805M, the reset voltage threshold is 4.40 V.

The ADM802L/ADM802M guarantee power fail accuracies to

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

P reset, backup battery switchover, watchdog timer, and power

2%.

brownout conditions. The RESET output remains opera-

tional with V

microprocessor or other low power devices.

toggled within 1.6 seconds.

detection, or to monitor a power supply other than +5 V.

FEATURES

Precision Supply Voltage Monitor

4.65 V ADM690A/ADM802L/ADM805L

4.40 V ADM692A/ADM802M/ADM805M

Reset Assertion Down to 1 V V

Reset Timeout—200 ms

Watchdog Timer—1.6 s

100 A Quiescent Supply Current

Automatic Battery Backup Power Switching

Voltage Monitor for Power Fail

Space-Saving MicroSOIC Package (ADM690A)

APPLICATIONS

Microprocessor Systems

Computers

Controllers

Intelligent Instruments

2% Power Fail Accuracy on ADM802L/M

as low as 1 V.

ADM690A/ADM692A/ADM802L/M/ADM805L/M

The ADM805L/M provides an active high reset output, RESET

instead of RESET.

The family of products is fabricated using an advanced epitaxial

CMOS process combining low power consumption and high

reliability. RESET assertion is guaranteed with V

They provide a pin-compatible upgrade for the MAX690A/

MAX692A/MAX802L/MAX802M/MAX805L

All parts are available in 8-pin DIP and SOIC packages. The

ADM690A is also available in a new space-saving microSOIC

package.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

POWER FAIL

WATCHDOG

INPUT (WDI)

INPUT (PFI)

BATT

FUNCTIONAL BLOCK DIAGRAM

4.65V*

1.25V

*4.4V FOR ADM692A/ADM802M/ADM805M

TRANSITION DETECTOR

World Wide Web Site: http://www.analog.com

SWITCHOVER

WATCHDOG

BATTERY

Supervisory Circuits

(1.6s)

( ) = ADM805L/M ONLY

GENERATOR

Microprocessor

RESET

ADM690A

ADM692A

ADM802L

ADM802M

ADM805L

ADM805M

as low as 1 V.

(RESET)

RESET

POWER FAIL

OUTPUT (PFO)

OUT

Related parts for ADM690AARNZ

ADM690AARNZ Summary of contents

Page 1

FEATURES Precision Supply Voltage Monitor 4.65 V ADM690A/ADM802L/ADM805L 4.40 V ADM692A/ADM802M/ADM805M Reset Assertion Down Reset Timeout—200 ms Watchdog Timer—1.6 s 100 A Quiescent Supply Current Automatic Battery Backup Power Switching Voltage Monitor for Power Fail ...

Page 2

ADM690A/ADM692A/ADM802L/M/ADM805L/M–SPECIFICATIONS ( 5.5 V (ADM690A/ADM802L/ADM805L unless otherwise noted) Parameter OPERATION CC BATT V Operating Voltage Range CC Supply Current (Excludes I ) OUT Supply Current in Battery Backup Mode Battery Standby ...

Page 3

ABSOLUTE MAXIMUM RATINGS +25 C unless otherwise noted ...

Page 4

ADM690A/ADM692A/ADM802L/M/ADM805L/M Typical Performance Curves 3 2.75 2.5 2. – mA OUT Figure 1. Output Voltage vs. Load Current in Battery Backup 100 90 PFO 10 1.3V 0% PFI 1.2V 200mV Figure 2. Power Fail ...

Page 5

V BATT BATTERY SWITCHOVER V CC RESET 4.65V* GENERATOR ADM690A WATCHDOG WATCHDOG ADM692A TRANSITION DETECTOR INPUT (WDI) (1.6s) ADM802L ADM802M ADM805L ADM805M POWER FAIL INPUT (PFI) 1.25V *4.4V FOR ADM692A/ADM802M/ADM805M ( ) = ADM805L/M ONLY Figure 7. Functional Block Diagram ...

Page 6

ADM690A/ADM692A/ADM802L/M/ADM805L/M Table I. Input and Output Status in Battery Backup Mode Signal Status connected to V OUT OUT BATT PMOS switch. RESET Logic low. RESET Logic high (ADM805L, ADM805M). The open circuit output voltage is equal to ...

Page 7

If the watchdog timer is not needed, the WDI input should be left floating. The Power Fail Input, PFI, monitors the input power supply via a resistive divider network. The voltage on the PFI input is compared with a precision ...

Page 8

ADM690A/ADM692A/ADM802L/M/ADM805L/M OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Pin Plastic DIP (N-8) 0.430 (10.92) 0.348 (8.84 0.280 (7.11) 0.240 (6.10 0.325 (8.25) 0.300 (7.62) 0.060 (1.52) PIN 1 0.015 (0.38) 0.210 (5.33) MAX 0.130 0.160 ...

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