ADM12914 Datasheet: Quad UV/OV Positive/Negative Voltage Supervisor





ADM12914 Quad UV/OV Positive/Negative Voltage Supervisor Datasheet

Part Number ADM12914
Description Quad UV/OV Positive/Negative Voltage Supervisor
Manufacture Analog Devices
Total Page 17 Pages
PDF Download Download ADM12914 Datasheet PDF

Features: Data Sheet ±0.8% Accurate Quad UV/OV P ositive/Negative Voltage Supervisor ADM 12914 FEATURES Quad undervoltage/overv oltage (UV/OV) positive/negative superv isor Supervises up to two negative rail s Adjustable UV and OV input thresholds Industry leading threshold accuracy ov er the extended temperature range: ±0. 8% 1 V buffered reference output Open-d rain UV and OV reset outputs Adjustable reset timeout with disable option Outp uts guaranteed down to VCC of 0.9 V Gli tch immunity 62 µA supply current 16-l ead QSOP package Specified from −40° C to +125°C APPLICATIONS Server supply monitoring FPGA/DSP core and I/O volta ge monitoring Telecommunications equipm ent Medical equipment FUNCTIONAL BLOCK DIAGRAM VCC TIMER ADM12914 VH1 500m V TIMER VL1 VH2 500mV UV VL2 VH3 OUTPUT LOGIC 500mV VL3 VH4 500mV VL4 MUX SEL GND Figure 1. OV LOGIC REF L ATCH/DIS REF GENERAL DESCRIPTION The A DM12914 is a quad voltage supervisory I C ideally suited for monitoring multiple rails in a wide range .

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Data Sheet
±0.8% Accurate Quad UV/OV
Positive/Negative Voltage Supervisor
ADM12914
FEATURES
Quad undervoltage/overvoltage (UV/OV) positive/negative
supervisor
Supervises up to two negative rails
Adjustable UV and OV input thresholds
Industry leading threshold accuracy over the extended
temperature range: ±0.8%
1 V buffered reference output
Open-drain UV and OV reset outputs
Adjustable reset timeout with disable option
Outputs guaranteed down to VCC of 0.9 V
Glitch immunity
62 µA supply current
16-lead QSOP package
Specified from −40°C to +125°C
APPLICATIONS
Server supply monitoring
FPGA/DSP core and I/O voltage monitoring
Telecommunications equipment
Medical equipment
FUNCTIONAL BLOCK DIAGRAM
VCC TIMER
ADM12914
VH1
500mV
TIMER
VL1
VH2
500mV
UV
VL2
VH3
OUTPUT
LOGIC
500mV
VL3
VH4
500mV
VL4
MUX
SEL GND
Figure 1.
OV
LOGIC
REF
LATCH/DIS
REF
GENERAL DESCRIPTION
The ADM12914 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 undervoltage
(UV) and overvoltage (OV) conditions with high threshold
accuracy of ±0.8%. Common active low undervoltage (UV) and
overvoltage (OV) pins are shared by each of the monitored
voltage rails.
The ADM12914 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.
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 at a level
no greater than 10 mA. The ADM12914 uses the internal shunt
regulator to regulate VCC if the supply line exceeds the absolute
maximum ratings.
The ADM12914 is available in two models. The ADM12914-1
offers a latching overvoltage output that can be cleared by
toggling the LATCH input pin. The ADM12914-2 has a disable
pin that can override and disable both the UV and the OV
output signals.
The ADM12914 is available in a 16-lead QSOP package. The
device is specified over the extended temperature range of
−40°C to +125°C.
Rev. E
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