ADM6710 [ADI]
Low Voltage, High Accuracy, Quad Voltage UP Supervisory Circuit; 低电压，高精度，四路电压UP监控电路
| 型号： | ADM6710 |
| 厂家： | 
ADI |
| 描述： | Low Voltage, High Accuracy, Quad Voltage UP Supervisory Circuit |
| 文件： | 总8页 (文件大小：184K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Low Voltage, High Accuracy,
Quad Voltage μP Supervisory Circuit
Preliminary Technical Data
ADM6710
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Accurate monitoring of up to four power supply voltages
5 reset threshold options: 1.8 V to 5 V
Monitors down to 0.62 V (1.5% accuracy)
200 ms typical reset timeout
IN
1
ADM6710
IN , V
CC
2
IN ,
2
V
CC
RESET
Open-drain
output (10 μA internal pull-up)
RESET
Reset output stage: active low, valid to IN1 = 1 V or IN2 = 1 V
Low power consumption (35 μA)
Power supply glitch immunity
200ms
TIMEOUT
IN
3
UVLO
Specified from −40º C to +85 ºC
6-lead SOT-23 package
IN
4
APPLICATIONS
0.62V REF
Microprocessor systems
Desktop and notebook computers
Controllers
Figure 1.
Data storage equipment
Servers/workstations
GENERAL DESCRIPTION
The ADM6710 output remains valid as long as IN1 or IN2
exceeds 1V, while for the ADM6710Q the output remains valid
as long as VCC exceeds 2 V.
The ADM6710 is a low voltage, high accuracy supervisory
circuit. This device monitors up to four system supply voltages.
If a monitored power supply voltage falls below the minimum
voltage threshold, a single active low output asserts, triggering a
system reset. The output is open drain with a weak internal
pull-up to the monitored IN2 supply (or to VCC in the case of the
ADM67109Q) of typically 10 μA. Once all voltages rise above
the selected threshold level, the reset signal remains low for the
reset timeout period (200 ms typical).
The ADM6710 incorporates a variety of internally pretrimmed
undervoltage threshold options for monitoring 5.0 V, 3.3 V, 3.0
V, 2.5 V and 1.8 V supply voltages. The device offers up to three
adjustable thresholds for monitoring voltages down to 0.62 V.
The ADM6710 is available in a 6-lead SOT-23 package and is
suitable for use in a variety of voltage monitoring applications.
Rev. PrB
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
©2007 Analog Devices, Inc. All rights reserved.
ADM6710
Preliminary Technical Data
TABLE OF CONTENTS
Features .............................................................................................. 1
Theory of Operation .........................................................................6
Input Configuration......................................................................6
Reset Output Configuration ........................................................6
Addition Of Manual Reset ...........................................................7
Outline Dimensions..........................................................................8
Ordering Guide .............................................................................8
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description......................................................................... 1
Specifications..................................................................................... 3
Absolute Maximum ratings............................................................. 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
Rev. PrB | Page 2 of 8
Preliminary Technical Data
ADM6710
SPECIFICATIONS
VIN2 = 1 V to 5.5 V, TA = −40ºC to 85ºC, unless otherwise stated. Typical values are VIN2 =3.0 V to 3.3 V, TA = +25ºC.
Table 1.
Parameter
Min
2.0
1.0
1.2
Typ
Max
5.5
5.5
5.5
40
Units
Test Conditions
VCC OPERATING VOLTAGE RANGE1
VIN2 OPERATING VOLTAGE RANGE2
V
ADM6710Q only
V
V
All devices except ADM6710Q; TA = 0ºC to +85ºC
All devices except ADM6710Q; TA = −40ºC to +85ºC
INX, INPUT CURRENT
25
55
μA
INX = nominal input voltage (for 1.8 V, 2.5 V and 5.0 V
supplies)
IN2 = nominal input voltage (for 3.0 V and 3.3 V supplies).
The supply splits into 25 μA for the resistor divider and
30 μA for other circuits.
115
μA
0.4
0.2
μA
μA
VIN1 = 0 to 0.85 V (for adjustable thresholds)
VIN3, V IN4 = 0 to .85 V (for adjustable thresholds)
ADM6710Q only; VCC = 5.5 V
INX decreasing; 5 V (−5%)
INX decreasing; 5 V (−10%)
INX decreasing; 3.3 V (−5%)
INX decreasing; 3.3 V (−10%)
INX decreasing; 3.0 V (−5%)
INX decreasing; 3.0 V (−10%)
INX decreasing; 2.5 V (−5%)
INX decreasing; 2.5 V (−10%)
INX decreasing; 1.8 V (−5%)
INX decreasing; 1.8 V (−10%)
INX decreasing
ICC INPUT CURRENT
35
50
THRESHOLD VOLTAGE (VTH)
4.50
4.25
3.00
2.85
2.70
2.55
2.25
2.13
1.62
1.53
0.611
4.63
4.38
3.08
2.93
2.78
2.63
2.32
2.19
1.67
1.58
0.620
0.3
4.75
4.50
3.15
3.00
2.85
2.70
2.38
2.25
1.71
1.62
0.629
V
V
V
V
V
V
V
V
V
V
ADJUSTABLE THRESHOLD (VTH)
V
RESET THRESHOLD HYSTERESIS (VHYST
)
%VTH
ppm/°C
INX increasing relative to INX decreasing
RESET THRESHOLD TEMPERATURE
COEFFICIENT (TCVTH)
60
INX to RESET DELAY (tRP)
RESET TIMEOUT PERIOD (tRP)
RESET OUTPUT LOW (VOL)
30
μs
ms
V
VIN falling at 10 mV/μs from VTH to VTH − 50 mV
140
200
280
0.3
0.4
0.3
V
IN2, VCC = 5 V, ISINK = 2 mA
V
V
VIN2, VCC = 2.5 V, ISINK = 1.2 mA
VIN2 = 1.0 , ISINK = 50 μA, TA = 0 ºC to +85 ºC
RESET OUTPUT HIGH (VOH)
0.8 × VCC
0.8 × VCC
V
RESET
RESET
VCC ≥2.0 V, ISOURCE=6 μA,
VIN2 ≥2.0 V, ISOURCE=6 μA,
deasserted (ADM6710Q only)
deasserted
V
RESET OUTPUT HIGH SOURCE
CURRENT (IOH)
10
μA
RESET
IN2 ≥ 2.0 V, deasserted
V
1 Note that the ADM6710Q is powered from VCC.
2
RESET
The
output is guaranteed to be in the correct state for IN1 or IN2 down to 1 V.
Rev. PrB | Page 3 of 8
ADM6710
Preliminary Technical Data
ABSOLUTE MAXIMUM RATINGS
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and 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.
Table 2.
Parameter
Rating
RESET
−0.3 V to +6 V
20 mA
VCC, INX,
to GND
RESET
Continuous
Current
Continuous Power Dissipation
Storage Temperature Range
Operating Temperature Range
Lead Temperature (10 sec)
Junction Temperature
450 mW
−65°C to +125°C
−40°C to +85°C
300°C
ESD CAUTION
150°C
Rev. PrB | Page 4 of 8
Preliminary Technical Data
ADM6710
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
IN
1
2
3
6
5
4
RESET
GND
IN
IN
IN
1
2
3
6
5
4
RESET
1
1
2
3
ADM6710Q
ADM6710
V
GND
TOP VIEW
TOP VIEW
CC
(Not to Scale)
(Not to Scale)
IN
IN
4
IN
4
3
Figure 2.
Table 3. Pin Function Descriptions
Pin No. Mneumonic Description
1
2
IN1
IN2
Input Voltage 1.
Input Voltage 2. IN2 is the power supply input for the ADM6710.
VCC
VCC is the power supply input for the ADM6710Q. It is not a monitored input.
3
4
5
6
IN3
IN4
GND
RESET
Input Voltage 3.
Input Voltage 4.
Ground.
RESET goes low when an input drops below the specified threshold. Once all inputs rise above the threshold
voltage, RESET remains low for 200 ms (typical) before going high. The RESET output is open drain with a weak
internal pull-up to IN2 or, in the case of the ADM6710Q to VCC, typically 10 μA.
Rev. PrB | Page 5 of 8
ADM6710
Preliminary Technical Data
THEORY OF OPERATION
V
INTH
The ADM6710 is a compact, low power supervisory circuit
capable of monitoring up to four voltages in multivoltage
applications. If a monitored power supply voltage falls below the
minimum voltage threshold, a single active low output asserts,
triggering a system reset.
R1
R2
V
= 0.62V
REF
The ADM6710 includes several voltage threshold options for
monitoring 5.0 V, 3.3 V, 3.0 V, 2.5 V and 1.8 V supplies. It also
provides up to three adjustable thresholds for monitoring
voltages down to 0.62 V. See the Ordering Guide section for a
list and description of all options available.
Figure 4. Setting the Adjustable Monitor
The ADM6710Q contains an internal voltage clamp at each of
the adjustable voltage inputs. Input voltages greater than 1.5 V
induce a higher input current.
The ADM6710 includes precision comparators, an accurate
band gap reference, and a series of internally-trimmed resistor
divider networks to set the factory-fixed reset threshold
options. The resistor networks scale the specified INx reset
voltages to match the internal band gap reference/comparator
voltage.
The ADM6710 is normally powered from the monitored IN2, or
VCC in the case of the ADM6710Q. Monitored inputs are
resistant to short power supply glitches. To increase noise
immunity in noisy applications, place a 0.1 μF capacitor
between the IN2 input and ground. Adding capacitance to IN1,
IN3, and IN4 also improves noise immunity.
Adjustable threshold options bypass the internal resistor
networks and connect directly to one of the comparator inputs.
External resistor divider networks must be used to scale
voltages down for monitoring at the adjustable inputs. The
ADM6710Q provides a separate unmonitored power supply
input (VCC) and three adjustable voltage inputs.
Do not allow unused monitor inputs to float or to be grounded.
Connect these inputs to a supply voltage greater than their
specified threshold voltages. In the case of unused INx
adjustable inputs, limit the bias current by connecting a 1 MΩ
series resistor between the unused input and IN2 (or VCC with
the ADM6710Q).
The internal comparators each typically have a hysteresis of
0.3% with respect to its reset threshold. This built-in hysteresis
improves the device’s immunity to ambient noise without
noticeably reducing the threshold accuracy. The ADM6710 is
unaffected by short input transients.
RESET OUTPUT CONFIGURATION
The ADM6710 has a reset timeout period of 200 ms (typical).
The output is open drain with a weak internal pull-up to the
monitored IN2 or VCC supply, typically 10 uA.
In many applications that interface with other logic devices,
there is no requirement for an external pull-up resistor. An
external pull-up resistor to any voltage, ranging from 0 V to
5.5 V, can overdrive the internal pull-up when interfacing to
different logic supply voltages (see Figure 5). Reverse current
flow from the external pull-up voltage to IN2 is prevented by
the internal circuitry.
ADM6710
IN
IN
IN
IN
1
2
3
4
MONITORED
SUPPLIES
MICROPROCESSOR
RESET
GND
Figure 3. Typical Applications Circuit
IN =3.3V
2
5V
INPUT CONFIGURATION
V
CC
The ADM6710 provides numerous monitor choices with
adjustable reset thresholds. Typically, the threshold voltage at
each adjustable INx input is 0.62 V. To monitor a voltage greater
than 0.62 V, connect a resistor divider network to the circuit as
depicted in Figure 4, where
100kΩ
ADM6710
RESET
RESET
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
R1 + R2
R2
VINTH = 0.62 V
Figure 5. Interface with a Different Logic Supply Voltage
The ADM6710Q is powered by VCC, which is not a monitored
voltage. All other ADM6710 options are powered by IN2, which
is a monitored voltage. If a supply voltage drops below its
associated threshold, the reset output asserts low and remains
low while either IN1 or IN2 remains above 1.0 V.
Rev. PrB | Page 6 of 8
Preliminary Technical Data
ADM6710
Use the circuit shown in Figure 6 to add a manual reset to the
ADM6710. When the switch is closed, the analog input shorts
ADDITION OF MANUAL RESET
ADM6710
RESET
to ground and a
output commences. The switch must
IN
IN
IN
IN
V
1
2
3
4
IN4
RESET
remain open for a minimum of 140 ms for the
deassert.
output to
RESET
R1
GND
R2
Figure 6. Addition of Manual Reset (IN4 is an Adjustable Input).
ADM6710
Preliminary Technical Data
OUTLINE DIMENSIONS
2.90 BSC
6
1
5
2
4
3
2.80 BSC
1.60 BSC
PIN 1
INDICATOR
0.95 BSC
1.90
BSC
1.30
1.15
0.90
1.45 MAX
0.22
0.08
10°
4°
0°
0.60
0.45
0.30
0.50
0.30
0.15 MAX
SEATING
PLANE
COMPLIANT TO JEDEC STANDARDS MO-178-AB
Figure 7. 6-Lead Small Outline Transistor Package [SOT-23]
(RJ-6)
Dimensions shown in millimeters
ORDERING GUIDE
Nominal Input Voltage
Supply
Tolerance (%)
Temperature
Range
Package
Description
Package
Option
Model
Branding
MA9
MAH
MAJ
MAK
MAX
MA4
MAL
MAM
MAN
MAP
MAQ
MAR
MAS
IN1
5
5
5
5
Adj.2 3.3
Adj.2 3.3
5
5
IN2 IN3
IN4
ADM6710AARJZ-REEL71
ADM6710BARJZ-REEL71
ADM6710CARJZ-REEL71
ADM6710DARJZ-REEL71
ADM6710EARJZ-REEL71
ADM6710FARJZ-REEL71
ADM6710GARJZ-REEL71
ADM6710HARJZ-REEL71
ADM6710IARJZ-REEL71
ADM6710JARJZ-REEL71
ADM6710KARJZ-REEL71
ADM6710LARJZ-REEL71
ADM6710MARJZ-REEL71
ADM6710NARJZ-REEL71
ADM6710OARJZ-REEL71
ADM6710PARJZ-REEL71
ADM6710QARJZ-REEL71
3.3
3.3
3.3
3.3
2.5
2.5
1.8
1.8
2.5
2.5
Adj.2 10
Adj.2
Adj.2 10
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
RJ-6
5
Adj.2
1.8
1.8
5
10
5
3.3
3.3
Adj.2 Adj.2 10
Adj.2 Adj.2
5
Adj.2 3.3
Adj.2 3.3
Adj.2 3.3
Adj.2 3.3
2.5
2.5
1.8
1.8
2.5
2.5
1.8
1.8
Adj.2 10
Adj.2
Adj.2 10
Adj.2
Adj.2 10
Adj.2
Adj.2 10
Adj.2
5
5
Adj.2
Adj.2
Adj.2
Adj.2
3
3
3
3
5
MAT
MAU
MAV
MAW
5
Adj.2 VCC Adj.2 Adj.2 N/A
1 Z = RoHS Compliant Part.
2 Adjustable voltage based on 0.62 V internal threshold. The external threshold voltage can be set using an external resistor divider.
©2007 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
PR06626-0-3/07(PrB)
Rev. PrB | Page 8 of 8
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ADI
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