Data Sheet
FEATURES
Low Voltage, High Accuracy, Triple/Quad
Voltage Microprocessor Supervisory Circuit
ADM6710
FUNCTIONAL BLOCK DIAGRAM
IN
1
Accurate monitoring of up to four power supply voltages
5 factory set threshold options: 1.8 V, 2.5 V, 3.0 V, 3.3 V, 5 V
Adjustable input threshold voltage = 0.62 V (1.5% accuracy)
200 ms typical reset timeout
Open-drain RESET output (10 μA internal pull-up)
Reset output stage: active low, valid to IN
1
= 1 V or IN
2
= 1 V
Low power consumption (35 μA)
Power supply glitch immunity
Specified from −40°C to +125°C
6-lead SOT-23 package
ADM6710
IN
2
, V
CC
IN
2
,
V
CC
RESET
200ms
TIMEOUT
IN
3
UVLO
IN
4
06626-001
APPLICATIONS
Telecommunications
Microprocessor systems
Desktop and notebook computers
Data storage equipment
Servers/workstations
0.62V REF
Figure 1.
GENERAL DESCRIPTION
The
ADM6710
is a low voltage, high accuracy supervisory
circuit. The device monitors up to four system supply voltages.
The
ADM6710
incorporates a variety of internally pretrimmed
undervoltage threshold options for monitoring 1.8 V, 2.5 V,
3.0 V, 3.3 V and 5.0 V supply voltages. The
ADM6710Q
offers
three adjustable thresholds for monitoring voltages down to
0.62 V. See the Ordering Guide section for a list and description
of all available options.
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 IN
2
supply (or to V
CC
in the case of the
ADM6710Q)
of typically 10 μA. After all voltages rise above the
selected threshold level, the reset signal remains low for the
reset timeout period (200 ms typical).
The
ADM6710
output remains valid as long as IN
1
or IN
2
exceeds 1 V, whereas for the
ADM6710Q,
the output remains
valid as long as V
CC
exceeds 2 V.
Unused monitored inputs must not be allowed to float or to be
grounded, instead they must be connected to a supply voltage
greater than their specified threshold voltages.
The
ADM6710
is available in a 6-lead SOT-23 package. The
device operates over the extended temperature range of −40°C
to +125°C.
Rev. B
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DOCUMENTATION
Data Sheet
•
ADM6710: Low Voltage, High Accuracy, Triple/Quad
Voltage Microprocessor Supervisory Circuit Data Sheet
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REFERENCE MATERIALS
Product Selection Guide
•
Supervisory Devices Complementary Parts Guide for
Altera FPGAs
•
Supervisory Devices Complementary Parts Guide for
Xilinx FPGAs
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•
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ADM6710
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution .................................................................................. 4
Pin Configurations and Function Descriptions ........................... 5
Data Sheet
Typical Performance Characteristics ..............................................6
Theory of Operation .........................................................................8
Input Configuration ......................................................................8
RESET Output Configuration .....................................................8
Addition Of Manual Reset ...........................................................8
Outline Dimensions ..........................................................................9
Ordering Guide .............................................................................9
REVISION HISTORY
11/15—Rev. A to Rev. B
Changes to Features Section and General Description Section........ 1
Changes to Operating Voltage Range, V
IN2
Parameter and
RESET Output Low (V
OL
) Parameter, Table 1 .............................. 3
Change to Storage Temperature Range Parameter and
Operating Temperature Range Parameter, Table 2 ...................... 4
Changes to Figure 4, Figure 6, and Figure 9.................................. 6
Updated Outline Dimensions ......................................................... 9
Changes to Ordering Guide ............................................................ 9
10/10—Rev. 0 to Rev. A
Added Figure 17................................................................................ 9
6/07—Revision 0: Initial Version
Rev. B | Page 2 of 12
Data Sheet
SPECIFICATIONS
V
IN2
= 1 V to 5.5 V, T
A
= −40°C to +125°C, unless otherwise noted. Typical values are V
IN2
= 3.0 V to 3.3 V, T
A
= 25°C.
Table 1.
Parameter
OPERATING VOLTAGE RANGE
V
CC 1
V
IN2 2
INPUT CURRENT
IN
x
Input Current
Min
2.0
1.0
1.2
25
55
Typ
Max
5.5
5.5
5.5
40
115
0.4
0.2
50
4.75
4.50
3.15
3.00
2.85
2.70
2.38
2.25
1.71
1.62
0.629
Units
V
V
V
µA
µA
µA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
%V
TH
ppm/°C
µs
ms
V
V
V
V
V
10
µA
Test Conditions/Comments
ADM6710
ADM6710Q
only
All devices except
ADM6710Q;
T
A
= 0°C to +125°C
All devices except
ADM6710Q;
T
A
= −40°C to +125°C
IN
X
= nominal input voltage (for 1.8 V, 2.5 V and 5.0 V
supplies)
IN
2
= 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
V
IN1
= 0 V to 0.85 V (for adjustable thresholds)
V
IN3
, V
IN4
= 0 V to 0.85 V (for adjustable thresholds)
ADM6710Q
only; V
CC
= 5.5 V
IN
X
decreasing; 5 V (−5%)
IN
X
decreasing; 5 V (−10%)
IN
X
decreasing; 3.3 V (−5%)
IN
X
decreasing; 3.3 V (−10%)
IN
X
decreasing; 3.0 V (−5%)
IN
X
decreasing; 3.0 V (−10%)
IN
X
decreasing; 2.5 V (−5%)
IN
X
decreasing; 2.5 V (−10%)
IN
X
decreasing; 1.8 V (−5%)
IN
X
decreasing; 1.8 V (−10%)
IN
X
decreasing
IN
X
increasing relative to IN
X
decreasing
I
CC
Input Current
THRESHOLD VOLTAGE
Threshold Voltage (V
TH
)
35
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
60
30
200
Adjustable Threshold (V
TH
)
RESET THRESHOLD HYSTERESIS (V
HYST
)
RESET THRESHOLD TEMPERATURE
COEFFICIENT (TCV
TH
)
IN
X
to RESET DELAY (t
RP
)
RESET TIMEOUT PERIOD (t
RP
)
RESET OUTPUT LOW (V
OL
)
V
IN
falling at 10 mV/µs from V
TH
to V
TH
− 50 mV
V
IN2
, V
CC
= 5 V, I
SINK
= 2 mA
V
IN2
, V
CC
= 2.5 V, I
SINK
= 1.2 mA
V
IN2
= 1.0 , I
SINK
= 20 µA, T
A
= 0°C to +125°C
V
CC
≥ 2.0 V, I
SOURCE
= 4 µA, RESET deasserted
(ADM6710Q only)
V
IN2
≥ 2.0 V, I
SOURCE
= 4 µA, RESET deasserted
V
IN2
≥ 2.0 V, RESET deasserted
140
280
0.3
0.4
0.3
RESET OUTPUT HIGH (V
OH
)
0.8 × V
CC
0.8 × V
IN2
RESET OUTPUT HIGH SOURCE CURRENT (I
OH
)
1
2
Note that the
ADM6710Q
is powered from V
CC
.
The RESET output is guaranteed to be in the correct state for IN
1
or IN
2
down to 1 V.
Rev. B | Page 3 of 12
ADM6710
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
V
CC
, IN
X
, RESET to GND
Continuous RESET Current
Storage Temperature Range
Operating Temperature Range
Lead Temperature (10 sec)
Junction Temperature
Rating
−0.3 V to +6 V
20 mA
−65°C to +150°C
−40°C to +125°C
300°C
135°C
Data Sheet
Table 3. Thermal Resistance
Package Type
6-lead SOT-23
θ
JA
169.5
Unit
°C/W
ESD CAUTION
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
Rev. B | Page 4 of 12
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