ANALOG DEVICES ADM6315 Service Manual
Open-Drain Microprocessor
V
www.BDTIC.com/ADI
FEATURES
Specified over temperature
Low power consumption (5 μA typical)
Precision voltage monitor of voltages from 2.5 V to 5 V
a
t 100 mV increments
Reset assertion down to V
Reset timeout periods: 1 ms, 20 ms, 140 ms,
or 1120 ms
(minimum)
Built-in manual reset
Pin compatible with the ADM811
Available in SOT-143 package
APPLICATIONS
Microprocessor systems
Controllers
Intelligent instruments
Automotive systems
Safety systems
Portable instruments
> 1 V
CC
Supervisory Circuit in 4-Lead SOT-143
ADM6315
FUNCTIONAL BLOCK DIAGRAM
SYSTEM
V
CC
MR
00081-001
CC
GND
RESET
V
ADM6315
RESET
CIRCUITRY
Figure 1.
ADM6315
MR
RESET
GND GND
Figure 2. Typical Operating Circuit
10kΩ
REF
DEBOUNCE
SYSTEM POWER
MICROPROCESSOR
RESET
00081-011
GENERAL DESCRIPTION
The ADM6315 is a reliable voltage-monitoring device that is
suitable for use in most voltage-monitoring applications.
The ADM6315 is designed to monitor as little as a 1.8%
deg
radation of a power supply voltage. The ADM6315 can
monitor all voltages (at 100 mV increments) from 2.5 V to 5 V.
Included in this circuit is a debounced manual reset input.
RESET
can be activated using an ordinary switch (pulling MR
low), a low input from another digital device, or a degradation
of the supply voltage.
The manual reset function is very useful, especially if the circuit
in
which the ADM6315 is operating enters into a state that can
be detected only by the user. Allowing the user to reset a system
manually can reduce the damage or danger that could otherwise
be caused by an out-of-control or locked-up system.
The ADM6315 is available in a cost- and space-efficient
T-143 package.
SO
Rev. E
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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 registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©1999–2007 Analog Devices, Inc. All rights reserved.
ADM6315
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TABLE OF CONTENTS
Features.............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
Thermal Resistance ...................................................................... 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
REVISION HISTORY
9/07—Rev. D to Rev. E
Changes to Absolute Maximum Ratings....................................... 4
Updated Outline Dimensions......................................................... 8
Changes to Ordering Guide............................................................ 8
4/06—Rev. C to Rev. D
pdated Format..................................................................Universal
U
Updated Outline Dimensions......................................................... 8
Changes to Ordering Guide............................................................ 8
12/03—Rev. B to Rev. C
E
dit to Absolute Maximum Ratings............................................... 3
Edits to Ordering Guide .................................................................. 4
Deleted Table I and Table II ............................................................ 6
Deleted Table III and Table IV........................................................ 7
Updated Outline Dimensions......................................................... 8
Typical Performance Characteristics..............................................6
Theory of Operation .........................................................................7
Interfacing to Output of Other Devices .....................................7
Benefits of a Very Accurate
Detailed Description.....................................................................7
Manual Reset Input.......................................................................7
Transient Immunity ......................................................................7
Outline Dimensions..........................................................................8
Ordering Guide .............................................................................8
2/03—Rev. A to Rev. B
E
dits to Features.................................................................................1
Edits to Specifications.......................................................................2
Edits to Absolute Maximum Ratings..............................................3
Edits to Ordering Guide...................................................................3
Edits to Table I and Table II .............................................................6
Edits to Table III and Table IV.........................................................7
Updated Outline Dimensions..........................................................8
10/01—Rev. 0 to Rev. A
dits to Table III ................................................................................7
E
Edits to Table IV ................................................................................7
1999—Revision 0: Initial Version
RESET
Threshold .............................7
Rev. E | Page 2 of 12
ADM6315
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SPECIFICATIONS
VCC = full operating range, TA = T
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
SUPPLY
Operating Voltage 1 5.5 V TA = −40°C to +85°C
VCC Supply Current 5 12 μA VCC = 5.5 V, no load, TA = −40°C to +85°C
15 μA VCC = 5.5 V, no load, TA = −40°C to +125°C
4 10 μA VCC = 3.6 V, no load, TA = −40°C to +85°C
12 μA VCC = 3.6 V, no load, TA = −40°C to +125°C
RESET VOLTAGE THRESHOLD (VTH)
V
V
RESET THRESHOLD TEMPERATURE COEFFICIENT
VCC TO RESET DELAY 35 μs VCC = falling at 1 mV/μs
RESET ACTIVE TIMEOUT PERIOD
ADM6315xxD1 1 1.4 2 ms TA = −40°C to +85°C
0.8 2.4 ms TA = −40°C to +125°C
ADM6315xxD2 20 28 40 ms TA = −40°C to +85°C
16 48 ms TA = −40°C to +125°C
ADM6315xxD3 140 200 280 ms TA = −40°C to +85°C
112 336 ms TA = −40°C to +125°C
ADM6315xxD4 1120 1570 2240 ms TA = −40°C to +85°C
896 2688 ms TA = −40°C to +125°C
MANUAL RESET
Input Threshold 0.8 V VTH > 4 V (VIL)
2.4 V VTH > 4 V (VIH)
0.3 × VCC V VTH < 4 V (VIL)
0.7 × VCC V VTH < 4 V (VIH)
Minimum Input Pulse 1 μs
Glitch Rejection 100 ns
To Reset Delay 500 ns
Pull-Up Resistance 32 63 100 kΩ
RESET OUTPUT
Output Voltage 0.4 V VCC > 4.25 V, I
0.3 V VCC > 2.5 V, I
0.3 V VCC > 1 V, I
Output Leakage Current 1 μA
MIN
to T
, VCC typical = 5 V, unless otherwise noted.
MAX
V
− 1.8% VTH VTH + 1.8% V TA = 25°C
TH
− 2.5% VTH + 2.5% V TA = −40°C to +85°C
TH
− 3.5% VTH + 3.5% V TA = −40°C to +125°C
TH
60 ppm/°C
= 3.2 mA
SINK
= 1.2 mA
SINK
= 80 μA
SINK
> VTH, RESET deasserted
V
CC
Rev. E | Page 3 of 12
ADM6315
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ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 2.
Parameter Rating
Terminal Voltage (with Respect to Ground)
VCC −0.3 V to +6 V
All Other Inputs −0.3 V to +6 V
Input Current
20 mA
V
CC
Output Current
RESET
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −65°C to +160°C
Lead Temperature (Soldering, 10 sec) 300°C
Vapor Phase (60 sec) 215°C
Infrared (15 sec) 220°C
ESD Rating 2.5 kV
Stresses above those listed under Absolute Maximum Ratings
y cause permanent damage to the device. This is a stress
ma
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.
20 mA
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 3. Thermal Resistance
Package Type θ
4-Lead SOT-143 330 °C/W
Unit
JA
ESD CAUTION
Rev. E | Page 4 of 12
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