ADM2914-1SRQZEP-R7 [ADI]
Quad UV/OV Positive/Negative Voltage Supervisor;
| 型号： | ADM2914-1SRQZEP-R7 |
| 厂家： | 
ADI |
| 描述： | Quad UV/OV Positive/Negative Voltage Supervisor 光电二极管 |
| 文件： | 总8页 (文件大小：188K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Quad UV/OV Positive/Negative
Voltage Supervisor
ADM2914-EP
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
CC
TIMER
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
ADM2914-EP
VH1
TIMER
500mV
500mV
VL1
VH2
UV
Outputs guaranteed down to VCC of 1 V
Glitch immunity
62 μA supply current
16-lead QSOP package
VL2
VH3
OUTPUT
LOGIC
ENHANCED PRODUCT FEATURES
500mV
500mV
Operating temperature range of −55°C to +125°C
OV
VL3
VH4
APPLICATIONS
MUX
Server supply monitoring
LOGIC
REF
LATCH
REF
FPGA/DSP core and I/O voltage monitoring
Telecommunications equipment
Medical equipment
VL4
SEL
GND
Figure 1.
GENERAL DESCRIPTION
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-EP uses the internal shunt
regulator to regulate VCC if the supply line exceeds the absolute
maximum ratings.
The ADM2914-EP 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
UV
OV
undervoltage ( ) and overvoltage ( ) pin is shared by each
of the monitored voltage rails.
The ADM2914-EP offers a latching overvoltage output that can
LATCH
be cleared by toggling the
input pin.
The ADM2914-EP 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 ADM2914-EP is available in a 16-lead QSOP package. The
device operates over the extended temperature range of −55°C
to +125°C.
Additional application and technical information can be found
in the ADM2914 data sheet.
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 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.
Trademarks and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2011 Analog Devices, Inc. All rights reserved.
ADM2914-EP
TABLE OF CONTENTS
Features .............................................................................................. 1
Absolute Maximum Ratings ............................................................4
ESD Caution...................................................................................4
Pin Configuration and Function Descriptions..............................5
Typical Performance Characteristics ..............................................6
Outline Dimensions..........................................................................8
Ordering Guide .............................................................................8
Enhanced Product Features ............................................................ 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
REVISION HISTORY
6/11—Revision 0: Initial Version
Rev. 0 | Page 2 of 8
ADM2914-EP
SPECIFICATIONS
LATCH
TA = −55°C to +125°C. Typical values at TA = 25°C, unless otherwise noted. VCC = 3.3 V, VLx = 0.45 V, VHx = 0.55 V,
SEL = VCC, unless otherwise noted.
= VCC,
Table 1.
Parameter
Min
Typ
Max
Unit Test Conditions/Comments
SHUNT REGULATOR
VCC Shunt Regulator Voltage, VSHUNT
6.2
6.2
6.6
6.6
200
6.9
7.0
300
V
V
mV
ICC = 5 mA
TA = −55°C to +125°C
ICC = 2 mA to 10 mA
VCC Shunt Regulator Load Regulation, ΔVSHUNT
SUPPLY
1
Supply Voltage, VCC
2.3
VSHUNT
1
2.1
50
V
V
V
mV
μA
Minimum VCC Output Valid, VCCR(MIN)
Supply Undervoltage Lockout, VCC(UVLO)
Supply Undervoltage Lockout Hysteresis, ΔVCC(HYST)
Supply Current, ICC
1.9
5
2
25
62
VCC rising
100
VCC = 2.3 V to 6 V
REFERENCE OUTPUT
Reference Output Voltage, VREF
0.985
0.985
1
1
1.015
1.020
V
V
IVREF
= 1 mA
TA = −55°C to +125°C
UNDERVOLTAGE/OVERVOLTAGE CHARACTERISTICS
Undervoltage/Overvoltage Threshold, VUOT
Undervoltage/Overvoltage Threshold to Output Delay, tUOD
VHx, VLx Input Current, IVHL
492.5
50
500
125
507.5
500
15
30
12.5
14
mV
μs
nA
nA
ms
ms
VHx = VUOT − 5 mV or VLx = VUOT + 5 mV
TA = −55°C to +125°C
CTIMER = 1 nF
UV OV
6
6
8.5
8.5
/
Timeout Period, tUOTO
TA = −55°C to +125°C
OV
OV
LATCH CLEAR INPUT
Latch Clear Threshold Input High, VLATCH
Latch Clear Threshold Input Low, VLATCH
1.2
V
(IH)
OV
LATCH
0.8
1
V
(IL)
VLATCH > 0.5 V
μA
Input Current, ILATCH
TIMER CHARACTERISTICS
TIMER Pull-Up Current, ITIMER(UP)
−1.3
−1.2
1.3
1.2
−180
−2.1
−2.1
2.1
2.1
−270
−2.8
−2.8
2.8
μA
μA
μA
μA
mV
VTIMER = 0 V
TA = −55°C to +125°C
VTIMER = 1.6 V
TA = −55°C to +125°C
Referenced to VCC
TIMER Pull-Down Current, ITIMER(DOWN)
2.8
TIMER Disable Voltage, VTIMER(DIS)
OUTPUT VOLTAGE
VCC = 2.3 V; IUV OV = −1 μA
UV OV
1
V
V
V
Output Voltage High,
Output Voltage Low,
/
, VOH
/
VCC = 2.3 V; IUV OV = 2.5 mA
UV OV
0.1
0.3
/
, VOL
/
VCC = 1 V; IUV = 100 μA
0.01
0.15
THREE-STATE INPUT SEL
Low Level Input Voltage, VIL
0.4
V
High Level Input Voltage, VIH
Pin Voltage When Left in High-Z State, VZ
1.4
0.7
0.6
V
V
V
μA
μA
0.9
0.9
1.1
1.2
25
30
ISEL = 10 μA
TA = −55°C to +125°C
SEL High, Low Input Current, ISEL
Maximum SEL Input Current, ISEL(MAX)
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. 0 | Page 3 of 8
ADM2914-EP
ABSOLUTE MAXIMUM RATINGS
Table 2.
Table 3. Thermal Resistance
Package Type
Parameter
Rating
θJA
Unit
VCC
UV, OV
−0.3 V to +6 V
−0.3 V to +16 V
−0.3 V to (VCC + 0.3 V)
−0.3 V to +7.5 V
10 mA
16-Lead QSOP
104
°C/W
TIMER
VLx, VHx, LATCH, SEL
ESD CAUTION
ICC
Reference Load Current (IREF
)
1 mA
IUV, IOV
10 mA
Storage Temperature Range
Operating Temperature Range
Lead Temperature (Soldering, 10 sec)
−65°C to +150°C
−55°C to +125°C
300°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Rev. 0 | Page 4 of 8
ADM2914-EP
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
V
VH1
VL1
VH2
VL2
VH3
VL3
VH4
VL4
1
2
3
4
5
6
7
8
16
CC
15 TIMER
14 SEL
13 LATCH
12 UV
ADM2914-EP
TOP VIEW
(Not to Scale)
11 OV
10 REF
9
GND
Figure 2. ADM2914-EP Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1
3
2
4
5
7
VH1
VH2
VL1
VL2
VH3
VH4
Voltage High Input 1 and Voltage High Input 2. If the voltage monitored by VH1 or VH2 drops below 0.5 V, an
undervoltage condition is detected. Connect to VCC when not in use.
Voltage Low Input 1 and Voltage Low Input 2. If the voltage monitored by VL1 or VL2 rises above 0.5 V, an
overvoltage condition is detected. Tie to GND when not in use.
Voltage High Input 3 and Voltage High Input 4. The polarity of these inputs is determined by the state of the SEL
pin. When the monitored input is configured as a positive voltage and the voltage monitored by VH3 or VH4 drops
below 0.5 V, an undervoltage condition is detected. Conversely, when the input is configured as a negative voltage
and the input drops below 0.5 V, an overvoltage condition is detected. Connect to VCC when not in use.
6
8
VL3
VL4
Voltage Low Input 3 and Voltage Low Input 4. The polarity of these inputs is determined by the state of the SEL pin.
When the monitored input is configured as a positive voltage and the voltage monitored by VL3 or VL4 rises above
0.5 V, an overvoltage condition is detected. Conversely, when the input is configured as a negative voltage and the
input rises above 0.5 V, an undervoltage condition is detected. Tie to GND when not in use.
9
10
GND
REF
Device Ground.
Buffered Reference Output. This pin is a 1 V reference that is used as an offset when monitoring negative voltages.
This pin can source or sink 1 mA and drive loads up to 1 nF. Larger capacitive loads may lead to instability. Leave
unconnected when not in use.
11
12
13
OV
Overvoltage Reset Output. OV is asserted low if a negative polarity input voltage drops below its associated
threshold or if a positive polarity input voltage exceeds its threshold. The ADM2914-EP allows OV to be latched
low. This pin has a weak pull-up to VCC and can be pulled up to 16 V externally. Leave this pin unconnected when
not in use.
Undervoltage Reset Output. UV is asserted low if a negative polarity input voltage exceeds its associated threshold
or if a positive polarity input voltage drops below its threshold. UV is held low for an adjustable timeout period set
by the external capacitor tied to the TIMER pin. The UV pin has a weak pull-up to VCC and can be pulled up to 16 V
externally via an external pull-up resistor. Leave this pin unconnected when not in use.
UV
LATCH
OV Latch Bypass Input/Clear Pin. When pulled high, the OV latch is cleared. When held high, the OV output has the
same delay and output characteristics as the UV output. When pulled low, the OV output is latched when asserted.
14
15
16
SEL
Input Polarity Select. This three-state input pin allows the polarity of VH3, VL3, VH4, and VL4 to be configured.
Connect to VCC or GND, or leave open to select one of three possible input polarity configurations.
Adjustable Reset Delay Timer. Connect an external capacitor to the TIMER pin to program the reset timeout delay.
Refer to Figure 14 in the Typical Performance Characteristics section. Connect this pin to VCC to bypass the timer.
Supply Voltage. VCC operates as a direct supply for voltages up to 6 V. For voltages greater than 6 V, it operates as a
shunt regulator. A dropper resistor must be used in this configuration to limit the current to less than 10 mA. When
used without the resistor, the voltage at this pin must not exceed 6 V. A 0.1 μF bypass capacitor or greater should
be used.
TIMER
VCC
Rev. 0 | Page 5 of 8
ADM2914-EP
TYPICAL PERFORMANCE CHARACTERISTICS
6.80
0.505
0.504
0.503
6.75
6.70
6.65
6.60
6.55
6.50
6.45
6.40
0.502
0.501
0.500
0.499
–40°C
+25°C
+85°C
0.498
0.497
0.496
0.495
0
2
4
I
6
8
10
–40 –25 –10
5
20
35
50
65
80
95 110 125
(mA)
TEMPERATURE (°C)
CC
Figure 3. Input Threshold Voltage vs. Temperature
Figure 6. VCC Shunt Voltage vs. ICC
90
85
80
75
70
65
60
55
50
1.020
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0.980
V
= 6V
CC
V
= 3.3V
= 2.3V
CC
V
CC
–40 –25 –10
5
20
35
50
65
80
95 110 125
–40 –25 –10
5
20
35
50
65
80
95 110 125
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 7. Buffered Reference Voltage vs. Temperature
Figure 4. Supply Current vs. Temperature
1000
900
800
700
600
500
400
300
200
100
0
6.80
6.75
6.70
6.65
6.60
6.55
6.50
6.45
6.40
200µA
1mA
2mA
5mA
10mA
RESET ASSERTED
ABOVE THE LINE
V
= 6V
CC
V
= 2.3V
CC
–40 –25 –10
5
20
35
50
65
80
95 110 125
0.1
1
10
100
TEMPERATURE (°C)
COMPARATOR OVERDRIVE (% OF V
)
TH
Figure 8. Transient Duration vs. Comparator Overdrive
Figure 5. VCC Shunt Voltage vs. Temperature
Rev. 0 | Page 6 of 8
ADM2914-EP
3.0
2.5
2.0
1.5
14
13
12
11
10
9
VHx = 0.45V
SEL = V
CC
UV = 150mV
1.0
0.5
0
UV = 50mV
8
–0.5
7
0
1
2
3
4
5
6
–40 –25 –10
5
20
35
50
65
80
95 110 125
SUPPLY VOLTAGE, V (V)
CC
TEMPERATURE (°C)
Figure 12. ISINK, IUV vs. VCC
UV OV
/ Timeout Period vs. Temperature
Figure 9.
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1000
900
800
700
600
500
400
300
200
100
0
WITH 10kΩ PULL-UP
+85°C
+25°C
–40°C
WITHOUT PULL-UP
–0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
5
10
15
SUPPLY VOLTAGE, V (V)
I
(mA)
CC
SINK
UV
Figure 10.
Output Voltage vs. VCC
UV OV
/ Voltage Output Low vs. Output Sink Current
Figure 13.
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
10k
VHx = 0.55V
SEL = V
CC
1k
100
10
1
0.1
0
1
2
3
4
5
1
10
100
(nF)
1000
SUPPLY VOLTAGE, V (V)
TIMER PIN CAPACITANCE C
CC
TIMER
UV
Figure 11.
Output Voltage vs. VCC
UV OV
Figure 14. / Timeout Period vs. Capacitance
Rev. 0 | Page 7 of 8
ADM2914-EP
OUTLINE DIMENSIONS
0.197 (5.00)
0.193 (4.90)
0.189 (4.80)
16
1
9
8
0.158 (4.01)
0.154 (3.91)
0.150 (3.81)
0.244 (6.20)
0.236 (5.99)
0.228 (5.79)
0.010 (0.25)
0.006 (0.15)
0.020 (0.51)
0.010 (0.25)
0.069 (1.75)
0.053 (1.35)
0.065 (1.65)
0.049 (1.25)
0.010 (0.25)
0.004 (0.10)
0.041 (1.04)
REF
SEATING
PLANE
8°
0°
0.025 (0.64)
BSC
0.050 (1.27)
0.016 (0.41)
COPLANARITY
0.004 (0.10)
0.012 (0.30)
0.008 (0.20)
COMPLIANT TO JEDEC STANDARDS MO-137-AB
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 15. 16-Lead Shrink Small Outline Package [QSOP]
(RQ-16)
Dimensions shown in inches and (millimeters)
ORDERING GUIDE
Model1
Temperature Range
Package Description
Package Option
RQ-16
RQ-16
ADM2914-1SRQZEP
ADM2914-1SRQZEP-R7
−55°C to +125°C
−55°C to +125°C
16-Lead Shrink Small Outline Package [QSOP]
16-Lead Shrink Small Outline Package [QSOP]
1 Z = RoHS Compliant Part.
©2011 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D09789-0-6/11(0)
Rev. 0 | Page 8 of 8
相关型号：
ADM2914-2ARQZ
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, ROHS COMPLIANT, MO-137AB, QSOP-16
ROCHESTER
ADM2914-2ARQZ-RL7
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, ROHS COMPLIANT, MO-137AB, QSOP-16
ROCHESTER
©2020 ICPDF网 联系我们和版权申明