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ADM2914-2ARQZ データシート(PDF) 1 Page - Analog Devices

部品番号 ADM2914-2ARQZ
部品情報  Quad UV/OV Positive/Negative Voltage Supervisor
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ホームページ  http://www.analog.com
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Quad UV/OV Positive/Negative
Voltage Supervisor
ADM2914
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2009 Analog Devices, Inc. All rights reserved.
FEATURES
Quad UV/OV positive/negative supervisor
Supervises up to 2 negative rails
Adjustable UV and OV input thresholds
High threshold accuracy over temperature: ±1.5%
1 V buffered reference output
Open-drain UV and
APPLICATIONS
OV reset outputs
Adjustable reset timeout with disable option
Outputs guaranteed down to V
CC of 1 V
Glitch immunity
62 µA supply current
16-lead QSOP package
Server supply monitoring
FPGA/DSP core and I/O voltage monitoring
Telecommunications equipment
Medical equipment
FUNCTIONAL BLOCK DIAGRAM
TIMER
TIMER
VCC
LOGIC
OUTPUT
LOGIC
REF
500mV
500mV
500mV
500mV
MUX
SEL
GND
ADM2914
VH1
UV
OV
REF
LATCH/DIS
VL1
VH2
VL2
VH3
VL3
VH4
VL4
Figure 1.
GENERAL DESCRIPTION
The ADM2914 is a quad voltage supervisory IC ideally suited
for monitoring multiple rails in a wide range of applications.
Each monitored rail has two dedicated input pins, VHx and VLx,
which allows each rail to be monitored for both overvoltage
(OV) and undervoltage (UV) conditions. A common active low
undervoltage (UV) and overvoltage (
The device incorporates an internal shunt regulator that enables
the device to be used in higher voltage systems. This feature
requires a resistor to be placed between the main supply rail and
the VCC pin to limit the current flow into the VCC pin to no
greater than 10 mA. The ADM2914 uses the internal shunt
regulator to regulate VCC if the supply line exceeds the absolute
maximum ratings.
The ADM2914 is available in two models. The ADM2914-1
offers a latching overvoltage output that can be cleared by
toggling the
OV) pin is shared by each
of the monitored voltage rails.
The ADM2914 includes a 1 V buffered reference output, REF,
that acts as an offset when monitoring a negative voltage. The
three-state SEL pin determines the polarity of the third and
fourth inputs, that is, it configures the device to monitor
positive or negative supplies.
LATCH input pin. The ADM2914-2 has a disable
pin that can override and disable both the OV and UV
The ADM2914 is available in a 16-lead QSOP package. The
device operates over the extended temperature range of −40°C
to +125°C.
output
signals.


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