Analog Devices ADM9264 Datasheet
L
H
V
REF
NC = NO CONNECT
L
H
L
H
L
H
PWROK
MONITOR
LOGIC
14
13
12
11
16
15
10
9
8
1
2
3
4
7
6
5
GND
SU1
SU2
SU3
SU4
NC
ERRX
V
CC
ERR1
ERR2
PWROK
ERR3
ERR4
DIS
ERRY
SU4DET
ADM9264
Quad Power Supply Monitor
a
FEATURES
Monitoring of 12 V, 5 V, 3.3 V and 2.8 V Supplies in
Parallel
Auxiliary Sensor Inputs
Low Power: 25 mA Typical
Internal Comparator Hysteresis
Power Supply Glitch Immunity
from 2.5 V to 6 V
V
CC
Guaranteed from –4 08 C to +858C
No External Components
16-Pin Narrow SOIC Package (150 Mil Wide)
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Network Systems
GENERAL DESCRIPTION
The ADM9264 is a Quad Supply Monitor IC which simultaneously monitors four separate power supply voltages and outputs error signals if any of the supply voltages go out of limits.
It is designed for PC supply monitoring but can be used on
any system where multiple power supplies require monitoring. The error output signals are available individually and also
gated into a common output - PWROK. Auxiliary inputs
ERRX, ERRY are provided which are also gated into the main
PWROK signal. These inputs allow signals from other monitoring circuits (for example temperature sensor, alarm, etc.) to be
linked into the ADM9264.
Each power supply monitor circuit uses a proprietary window
comparator design whereby a three resistor network is used in
conjunction with two comparators and a single precision voltage
reference to check if the supply is within its required operating
tolerance. An added feature of this design is that the power
supply voltages being monitored can be higher than the power
supply voltage to the monitoring IC itself.
for Desktop PCs
ADM9264
FUNCTIONAL BLOCK DIAGRAM
Analog Devices’ experience in the design of power supply supervisory circuits is used to provide an optimum solution for the
overall circuit in terms of cost, performance and power consumption. Key features of the design include the incorporation
of hysteresis and glitch immunity into the comparators, which
minimizes the possibility of spurious triggering by noise spikes
on the supplies being monitored.
The part is manufactured on one of Analog Devices’ proprietary
BiCMOS processes, which also includes high performance thin
film resistors to achieve the accuracy required for the precision
voltage reference and power supply high and low trip points.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 World Wide Web Site: http://www.analog.com
Fax: 617/326-8703 © Analog Devices, Inc., 1997
ADM9264–SPECIFICATIONS
(VCC = Full Operating Range, TA = T
MIN
to T
unless otherwise noted)
MAX
Parameter Min Typ Max Units Test Conditions/Comments
OPERATING TEMPERATURE RANGE –40 85 °C Industrial (A Version)
VCC SUPPLY VOLTAGE 2.5 6.0 V
V
SUPPLY CURRENT 25 75 µA Digital Inputs = V
CC
/GND
CC
SU1 INPUT RESISTANCE 200 240 kΩ I IN ~ 50 µA when SU1 = 12 V
SU2 INPUT RESISTANCE 85 100 kΩ I IN ~ 50 µA when SU2 = 5 V
SU3 INPUT RESISTANCE 55 66 kΩ I IN ~ 50 µA when SU3 = 3.3 V
SU4 INPUT RESISTANCE 45 56 kΩ I IN ~ 50 µA when SU4 = 2.8 V
SU1 HIGH TRIP POINT 12.72 12.96 13.2 V Measured with SU1 Rising
SU2 HIGH TRIP POINT 5.35 5.45 5.55 V Measured with SU2 Rising
SU3 HIGH TRIP POINT 3.53 3.60 3.66 V Measured with SU3 Rising
SU4 HIGH TRIP POINT 2.94 3.00 3.05 V Measured with SU4 Rising
SU1 LOW TRIP POINT 10.8 11.04 11.28 V Measured with SU1 Falling
SU2 LOW TRIP POINT 4.45 4.55 4.65 V Measured with SU2 Falling
SU3 LOW TRIP POINT 2.94 3.00 3.07 V Measured with SU3 Falling
SU4 LOW TRIP POINT 2.55 2.60 2.66 V Measured with SU4 Falling
SU1 HYSTERESIS 320 mV Measured at SU1
SU2 HYSTERESIS 130 mV Measured at SU2
SU3 HYSTERESIS 90 mV Measured at SU3
SU4 HYSTERESIS 80 mV Measured at SU4
GLITCH IMMUNITY 10 µs 100 mV Glitch on V
or SU1-4
CC
PROPAGATION DELAY 10 µs Delay from Supply Going Outside
Tolerance until Output Changes
DIGITAL INPUT LOW, V
DIGITAL INPUT HIGH, V
DIGITAL INPUT LOW, V
DIGITAL INPUT HIGH, V
IL
IH
IL
IH
2.4 V 4.0 V < VCC < 6 V
2.0 V 2.5 V < VCC < 4.0 V
0.8 V 4.0 V < VCC < 6 V
0.5 V 2.5 V < VCC < 4.0 V
DIGITAL INPUT CURRENT –1 +1 µA (ERRX, ERRY, DIS)
OPEN DRAIN OUTPUT LOW 0.4 V 10 kΩ External to Positive Supply V+
OPEN DRAIN OUTPUT HIGH V+ –0.25 V 10 kΩ External to Positive Supply V+
SUPPLY RANGE FOR V+ 2.5 6.0 V V+ Can Be Different from V
Specifications subject to change without notice.
CC
–2–
REV. 0
ADM9264
WARNING!
ESD SENSITIVE DEVICE
ABSOLUTE MAXIMUM RATINGS*
(T
= +25°C unless otherwise noted)
A
ORDERING GUIDE
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
SU1, SU2, SU3, SU4 . . . . . . . . . . . . . . . . . . –0.3 V to +15 V
All Other Inputs . . . . . . . . . . . . . . . . . . –0.3 V to V
+ 0.3 V
CC
All Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
Output Current
ERR1-4, PWROK . . . . . . . . . . . . . . . . 20 mA
Operating Temperature Range
Industrial (A Version) . . . . . . . . . . . . . . . . –40°C to +85°C
Power Dissipation, R-16A . . . . . . . . . . . . . . . . . . . 700 mW
θ
Thermal Impedance . . . . . . . . . . . . . . . . . . . 110°C/W
JA
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . . +300°C
Model Range Option
ADM9264ARN –40°C to +85°C R-16A
ADM9264ARN-REEL
ADM9264ARN-REEL7
NOTES
1
R = Small Outline IC.
2
2500 devices per reel.
3
1000 devices per reel.
2
3
Vapor Phase (60 secs) . . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 secs) . . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute maximum ratings for
extended periods of time may affect device reliability.
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 the ADM9264 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.
Temperature Package
–40°C to +85°C R-16A
–40°C to +85°C R-16A
1
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–3–
ADM9264
PIN CONFIGURATION
GND
1
SU1
2
SU2
3
SU3
4
SU4
5
NC
6
ERRX
7
V
8
CC
NC = NO CONNECT
ADM9264
TOP VIEW
(Not to Scale)
16
15
14
13
12
11
10
9
ERR1
ERR2
PWROK
ERR3
ERR4
DIS
ERRY
SU4DET
PIN FUNCTION DESCRIPTIONS
Pin No. Mnemonic Function
1 GND Ground.
2 SU1 Supply to Be Monitored. 12 V ± 6%.
3 SU2 Supply to Be Monitored. 5 V ± 7%.
4 SU3 Supply to Be Monitored. 3.3 V ± 7%.
5 SU4 Supply to Be Monitored. 2.8 V ± 5%.
6 NC No Connect.
7 ERRX Digital Input. Auxiliary error input (active high). When High it forces PWROK to be Low.
8V
CC
Supply Monitor IC Power Supply. Can be powered off any power supply between 2.5 V and 6 V
including one of the supplies being monitored (except for SU1).
9 SU4DET Digital Input. Disable SU4. When High it causes ERR4 to pull high through 10 kΩ external resistor to
a positive power supply.
10 ERRY Digital Input. Auxiliary error input (active low). When Low it forces PWROK to be Low.
11 DIS Digital Input. When High it forces PWROK to be High.
12 ERR4 Open Drain Output. Pulls high through 10 kΩ external resistor to a positive power supply when
SU4DET is high or SU4 is within its required tolerance of 2.8 V ± 5%. Pulls Low otherwise.
13 ERR3 Open Drain Output. Low when SU3 is outside its required tolerance of 3.3 V ± 7%. Pulls High other-
wise through 10 kΩ external resistor to a positive power supply.
14 PWROK Open Drain Output. Pulls High through external 10 kΩ resistor to a positive power supply when SU1,
SU2, SU3 and SU4 are all within their required tolerances and when ERRY is High and when ERRX
is Low. Pulls Low otherwise.
15 ERR2 Open Drain Output. Low when SU2 is outside its required tolerance of 5 V ± 7%. Pulls High other-
wise through 10 kΩ external resistor to a positive power supply.
16 ERR1 Open Drain Output. Low when SU1 is outside its required tolerance of 12 V ± 6%. Pulls High other-
wise through 10 kΩ external resistor to a positive power supply.
–4–
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