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ADM2914 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 ADM2914은 전자 산업 및 응용 분야에서
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부품번호 ADM2914 기능
기능 Quad UV/OV Positive/Negative Voltage Supervisor
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ADM2914 데이터시트, 핀배열, 회로
Data Sheet
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 OV reset outputs
Adjustable reset timeout with disable option
Outputs guaranteed down to VCC of 1 V
Glitch immunity
62 µA supply current
16-lead QSOP package
APPLICATIONS
Server supply monitoring
FPGA/DSP core and I/O voltage monitoring
Telecommunications equipment
Medical equipment
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 allow each rail to be monitored for both overvoltage (OV)
and undervoltage (UV) conditions. A common active low
undervoltage (UV) and overvoltage (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.
The device incorporates an internal shunt regulator that enables
the device to be used in higher voltage systems. This feature
Quad UV/OV Positive/Negative
Voltage Supervisor
ADM2914
FUNCTIONAL BLOCK DIAGRAM
VCC TIMER
ADM2914
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
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 LATCH input pin. The ADM2914-2 has a disable
pin that can override and disable both the OV and UV output
signals.
The ADM2914 is available in a 16-lead QSOP package. The
device operates over the extended temperature range of −40°C
to +125°C.
Rev. E
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. 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 ©2009–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com




ADM2914 pdf, 반도체, 판매, 대치품
Data Sheet
ADM2914
SPECIFICATIONS
TA = −40°C to +85°C. Typical values at TA = 25°C, unless otherwise noted. VCC = 3.3 V, VLx = 0.45 V, VHx = 0.55 V, LATCH = VCC,
SEL = VCC, DIS = open, unless otherwise noted.
Table 1.
Parameter
SHUNT REGULATOR
VCC Shunt Regulator Voltage, VSHUNT
VCC Shunt Regulator Load Regulation, ΔVSHUNT
SUPPLY
Supply Voltage, VCC1
Minimum VCC Output Valid, VCCR(MIN)
Supply Undervoltage Lockout, VCC(UVLO)
Supply Undervoltage Lockout Hysteresis, ΔVCC(HYST)
Supply Current, ICC
REFERENCE OUTPUT
Reference Output Voltage, VREF
UNDERVOLTAGE/OVERVOLTAGE CHARACTERISTICS
Undervoltage/Overvoltage Threshold, VUOT
Undervoltage/Overvoltage Threshold to Output Delay, tUOD
VHx, VLx Input Current, IVHL
UV/OV Timeout Period, tUOTO
OV LATCH CLEAR INPUT (ADM2914-1)
OV Latch Clear Threshold Input High, VLATCH(IH)
OV Latch Clear Threshold Input Low, VLATCH(IL)
LATCH Input Current, ILATCH
DISABLE INPUT (ADM2914-2)
DIS Input High, VDIS(IH)
DIS Input Low, VDIS(IL)
DIS Input Current, IDIS
TIMER CHARACTERISTICS
TIMER Pull-Up Current, ITIMER(UP)
TIMER Pull-Down Current, ITIMER(DOWN)
TIMER Disable Voltage, VTIMER(DIS)
OUTPUT VOLTAGE
Output Voltage High, UV/OV, VOH
Output Voltage Low, UV/OV, VOL
THREE-STATE INPUT SEL
Low Level Input Voltage, VIL
High Level Input Voltage, VIH
Pin Voltage When Left in High-Z State, VZ
SEL High, Low Input Current, ISEL
Maximum SEL Input Current, ISEL(MAX)
Min Typ Max Unit Test Conditions/Comments
6.2 6.6 6.9 V
ICC = 5 mA
6.2 6.6 7.0 V
TA = −40°C to +125°C
200 300 mV ICC = 2 mA to 10 mA
2.3 VSHUNT V
1 V DIS = 0 V
1.9 2
2.1 V
DIS = 0 V, VCC rising
5
25 50
mV DIS = 0 V
62 100 μA VCC = 2.3 V to 6 V
0.985 1
0.985 1
1.015 V
1.020 V
IVREF = ±1 mA
TA = −40°C to +125°C
492.5 500
50 125
6 8.5
6 8.5
507.5
500
±15
±30
12.5
14
mV
μs
nA
nA
ms
ms
VHx = VUOT − 5 mV or VLx = VUOT + 5 mV
TA = −40°C to +125°C
CTIMER = 1 nF
TA = −40°C to +125°C
1.2 V
0.8 V
±1 μA VLATCH > 0.5 V
1.2
12
V
0.8 V
3 μA VDIS > 0.5 V
−1.3 −2.1 −2.8 μA
VTIMER = 0 V
−1.2 −2.1 −2.8 μA TA = −40°C to +125°C
1.3 2.1 2.8 μA VTIMER = 1.6 V
1.2 2.1 2.8 μA TA = −40°C to +125°C
−180 −270
mV Referenced to VCC
1 V VCC = 2.3 V; IUV/OV = −1 μA
0.1 0.3
V
VCC = 2.3 V; IUV/OV = 2.5 mA
0.01 0.15 V
VCC = 1 V; IUV = 100 μA
0.4 V
1.4 V
0.7 0.9 1.1 V
ISEL = ±10 μA
0.6 0.9 1.2 V
TA = −40°C to +125°C
±25 μA
±30 μA SEL tied to VCC or GND
1 The maximum voltage on the VCC pin is limited by the input current. The VCC pin has an internal 6.5 V shunt regulator and, therefore, a low impedance supply greater
than 6 V may exceed the maximum allowed input current. When operating from a higher supply than 6 V, always use a dropper resistor.
Rev. E | Page 3 of 16

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ADM2914 전자부품, 판매, 대치품
ADM2914
TYPICAL PERFORMANCE CHARACTERISTICS
0.505
0.504
0.503
0.502
0.501
0.500
0.499
0.498
0.497
0.496
0.495
–40 –30 –20 –10 0 10 20 30 40 50 60 70 80
TEMPERATURE (°C)
Figure 4. Input Threshold Voltage vs. Temperature
100
95
90
85
80
75
70
65
60
55
50
–40
VCC = 6V
VCC = 3.3V
VCC = 2.3V
–15 10 35
TEMPERATURE (°C)
60
Figure 5. Supply Current vs. Temperature
85
6.80
6.75
6.70
200µA
1mA
2mA
5mA
10mA
6.65
6.60
6.55
6.50
6.45
6.40
–40
–15 10 35
TEMPERATURE (°C)
60
Figure 6. VCC Shunt Voltage vs. Temperature
85
Data Sheet
6.80
6.75
6.70
6.65
6.60
6.55
6.50
6.45
6.40
0
–40°C
+85°C
+25°C
2 46
ICC (mA)
Figure 7. VCC Shunt Voltage vs. ICC
8
10
1.005
1.004
1.003
1.002
1.001
1.000
0.999
0.998
0.997
0.996
0.995
–40 –20 0 20 40 60 80
TEMPERATURE (°C)
Figure 8. Buffered Reference Voltage vs. Temperature
1000
900
RESET ASSERTED
ABOVE THE LINE
800
700
600 VCC = 6V
500
400
300 VCC = 2.3V
200
100
0
0.1 1
10 100
COMPARATOR OVERDRIVE (% OF VTH)
Figure 9. Transient Duration vs. Comparator Overdrive
Rev. E | Page 6 of 16

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부품번호상세설명 및 기능제조사
ADM2914

Quad UV/OV Positive/Negative Voltage Supervisor

Analog Devices
Analog Devices

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