ADM6315 Datasheet by Analog Devices Inc.

ANALOG DEVICES ADM6315 Include RESE 1‘ Ducumemfeedbick

Open-Drain Microprocessor

Supervisory Circuit in 4-Lead SOT-143

Data Sheet

ADM6315

Rev. H Document Feedback

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FEATURES

Specified over temperature

Low power consumption (5 μA typical)

Precision voltage monitor of voltages from 2.5 V to 5 V

at 100 mV increments

Reset assertion down to VCC > 1 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

FUNCTIONAL BLOCK DIAGRAM

DEBOUNCE

ADM6315

GND

RESET

REF

RESET

CIRCUITRY

00081-001

Figure 1.

ADM6315

GND GND

10kΩ

SYSTEM POWER

MICROPROCESSOR

SYSTEM

00081-011

RESET

Figure 2. Typical Operating Circuit

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%

degradation 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 efficient and space efficient

SOT-143 package.

snafu: of an Accunls RE

ADM6315 Data Sheet

Rev. H | Page 2 of 8

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

Typical Performance Characteristics ..............................................6

Theory of Operation .........................................................................7

Interfacing to Output of Other Devices .....................................7

Benefits of an Accurate RESET Threshold ....................................7

Detailed Description .....................................................................7

Manual Reset Input .......................................................................7

Transient Immunity ......................................................................7

Outline Dimensions ..........................................................................8

Ordering Guide .............................................................................8

REVISION HISTORY

11/2018—Rev. G to Rev. H

Change to Features Section ............................................................. 1

Deleted Automotive Products Section ........................................... 8

Changes to Ordering Guide ............................................................ 8

9/2013—Rev. F to Rev. G

Changed Date in Revision F Revision History ............................. 2

Updated Outline Dimensions ......................................................... 8

12/2011—Rev. E to Rev. F

Added Automotive Part ..................................................... Universal

Changes to Ordering Guide ............................................................ 8

9/2007—Rev. D to Rev. E

Changes to Absolute Maximum Ratings ....................................... 4

Updated Outline Dimensions ......................................................... 8

Changes to Ordering Guide ............................................................ 8

4/2006—Rev. C to Rev. D

Updated Format .................................................................. Universal

Updated Outline Dimensions ......................................................... 8

Changes to Ordering Guide ............................................................ 8

12/2003—Rev. B to Rev. C

Edit 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

2/2003—Rev. A to Rev. B

Edits 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

10/2001—Rev. 0 to Rev. A

Edits to Table III ................................................................................ 7

Edits to Table IV ................................................................................ 7

1999—Revision 0: Initial Version

RESET RESET RESET RESET RESET

Data Sheet ADM6315

Rev. H | Page 3 of 8

SPECIFICATIONS

VCC = full operating range, TA = TMIN to TMAX, VCC typical = 5 V, unless otherwise noted.

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) VTH − 1.8% VTH VTH + 1.8% V TA = 25°C

VTH − 2.5% VTH + 2.5% V TA = −40°C to +85°C

VTH − 3.5% VTH + 3.5% V TA = −40°C to +125°C

RESET THRESHOLD TEMPERATURE COEFFICIENT 60 ppm/°C

VCC TO RESET DELAY 35 μs VCC = falling at 1 mV/μs

RESET ACTIVE TIMEOUT PERIOD

ADM6315xxD1

1.4

= −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

= −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

To Reset Delay 500 ns

Pull-Up Resistance 32 63 100 kΩ

RESET OUTPUT

Output Voltage 0.4 V VCC > 4.25 V, ISINK = 3.2 mA

0.3 V VCC > 2.5 V, ISINK = 1.2 mA

0.3 V VCC > 1 V, ISINK = 80 μA

Output Leakage Current 1 μA VCC > VTH, RESET deasserted

RESET Am ESD [eleummic Ischavgel sensitive devite. Charged devkes and mom boards (an amavge wmham dmmun mmaugh mg pmdun lemme: paxemed or pvopnexavy pmemon mumy, damage may occuv on dewces summed m hlgh enevgy ESD Therelave, pvopev ESD precautions mama be Kaken m avmd performance degvadanon or loss of funcuona‘ny

ADM6315 Data Sheet

Rev. H | Page 4 of 8

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

VCC 20 mA

Output Current

RESET 20 mA

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 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.

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 θJA Unit

4-Lead SOT-143 330 °C/W

ESD CAUTION

WE LIL! §\ Ihenﬁm

Data Sheet ADM6315

Rev. H | Page 5 of 8

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

GND

RESET

ADM6315

TOP VIEW

(Not to Scale)

00081-002

Figure 3. Pin Configuration

Table 4. Pin Function Descriptions

Pin No. Mnemonic Description

1 GND Ground Reference for All Signals, 0 V.

2 RESET Active Low Logic Output. RESET remains low while VCC is below the reset threshold or when MR is low. RESET

then remains low for a minimum of 1 ms, 20 ms, 140 ms, or 1120 ms after VCC rises above the reset threshold

and MR is high.

3 MR Manual Reset. This active low debounced input ignores input pulses of 100 ns (typical) and is guaranteed to

accept input pulses of greater than 1 μs. Leave floating when not used.

4 VCC Monitored Supply Voltage.

/ 7 Maximum TmmremDu/ar/on vs. RESET was 12 :2 19:33 53.3: 22.12 E 395me any. 3:553: 73. 55:5 Ens” //‘ i’g‘ / r,” J /J m «as 1 E a _ :3 :2: mg zaeaiwgn. is 85. 582: ES“ 55:59.

ADM6315 Data Sheet

Rev. H | Page 6 of 8

TYPICAL PERFORMANCE CHARACTERISTICS

TEMPERATURE (°C)

–40

(µA)

–20 020 40 60 80 100 125

= 5.5V

= 3V

= 1V

00081-003

Figure 4. Supply Current vs. Temperature

POWER-DOWN RESET DELAY (µs)

100

150

200

250

300

350

400

450

= 20mV

= 125mV

= 200mV

TEMPERATURE (°C)

–40

–20 020 40 60 80 100 125

00081-004

Figure 5. Power-Down Reset Delay vs. Temperature

0.94

NORMALIZED RESET TIMEOUT PERIOD (ms)

0.96

0.98

1.00

1.02

1.04

1.06

TEMPERATURE (°C)

–40

–20 020 40 60 80 100 125

00081-005

Figure 6. Normalized Reset Timeout Period vs. Temperature (VCC Rising)

0100 200 300 400 500 600 700 800 900 1000

MAXIMUM TRANSIENT DURATION (µs)

00081-012

RESET COMPARATOR OVERDRIVE, (V

– V

) (mV)

Figure 7. Maximum Transient Duration vs. RESET Comparator Overdrive

NORMALIZED RESET THRESHOLD (V)

0.995

1.000

1.005

0.990

TEMPERATURE (°C)

–40

–20 020 40 60 80 100 125

00081-007

Figure 8. Normalized Reset Threshold vs. Temperature (VCC Falling)

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

+85°C

+25°C –40°C

012345

00081-008

Figure 9. Supply Current vs. Supply Voltage

RiESEY RiESET

Data Sheet ADM6315

Rev. H | Page 7 of 8

THEORY OF OPERATION

INTERFACING TO OUTPUT OF OTHER DEVICES

The ADM6315 series is designed to integrate with as many

devices as possible. One feature of the ADM6315 is the RESET

open-drain output, which can sink current from sources with a

voltage greater than the VCC of the ADM6315 input, making it

suitable for use in more diverse applications.

BENEFITS OF AN ACCURATE RESET THRESHOLD

Because the ADM6315 series can operate effectively even when

there are large degradations of the supply voltages (due to an

accurate internal voltage reference circuit), the possibility of a

malfunction during a power failure is greatly reduced.

RESET

VOL

TRIP POINT (MAX)

TRIP POINT

TO RESET

DELAY

TRIP POINT (MIN)

00081-009

Figure 10. VCC Power-Down/Brownout Timing Diagram

DETAILED DESCRIPTION

The ADM6315 is designed to protect the integrity of a system’s

operation by ensuring the proper operation of the system

during power-up, power-down, and brownout conditions.

When the ADM6315 is powered up, the RESET output of the

ADM6315 remains low for a period typically equal to the RESET

active timeout period. This feature allows adequate time for the

system to power up correctly and for the power supply to

stabilize before any devices are brought out of reset and allowed

to begin executing instructions. Initializing a system in this way

provides a more reliable startup for microprocessor systems.

When a brownout condition occurs (assuming VCC is falling at

1 mV/μs), the ADM6315 produces a reset in 35 μs typical.

Producing a reset this fast means that the entire system can be

reset together before any part of the system’s voltage falls below

its recommended operating voltage. This system reset can avoid

dangerous and/or erroneous operation of a microprocessor-

based system.

MANUAL RESET INPUT

The ADM6315 also provides an additional input, MR. This

input can be used either as a means for the system operator to

reset the system manually via a switch or for a digital circuit to

reset the system.

The MR input (typically) ignores negative-going pulses that are

faster than 100 ns, and it is guaranteed to accept any negative-

going input pulse of a duration greater than or equal to 1 μs. If

MR is connected to long cables or is used in a noisy environment,

placing a 1 μF decoupling capacitor between the MR input and

ground further improves the glitch immunity of the ADM6315.

TRIP POINT (MAX)

TRIP POINT

TRIP POINT (MIN)

RESET

RESET ACTIVE TIMEOUT

00081-010

Figure 11. VCC Power-Up Timing Diagram

TRANSIENT IMMUNITY

As well as being an accurate reset circuit, the ADM6315 has

good immunity from negative-going transients (see Figure 7).

Because of this characteristic, the ADM6315 is suitable for use

in noisy environments.

Figure 7 shows the RESET comparator overdrive (the maximum

magnitude of negative-going pulses with respect to the typical

reset threshold) vs. the pulse duration without a reset.

ANALOG DEVICES

ADM6315 Data Sheet

Rev. H | Page 8 of 8

OUTLINE DIMENSIONS

COMPLIANT TO JEDEC STANDARDS TO-253-AA

0.89

0.76

0.50

0.30

0.100

0.013

3.04

2.90

2.80

1.07

0.90

0.75

1.92 BSC

1.72 REF

0.20

BSC

0.54 REF

1.40

1.30

1.20

2.64

2.10

8°

0°

0.60

0.50

0.40

0.20

0.08

1.22

0.80

03-13-2012-B

SEATING

PLANE

Figure 12. 4-Lead Small Outline Transistor Package [SOT-143]

(RA-4)

Dimensions shown in millimeters

ORDERING GUIDE

Model1 Temperature Range Package Description Package Option Trip Point

Minimum

Timeout (ms) Marking Code

ADM6315-44D1ARTRL7 −40°C to +125°C 4-Lead SOT-143 RA-4 4.39 1 MDT

ADM6315-31D1ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 3.08 1 M7X

ADM6315-29D1ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 2.93 1 M7T

ADM6315-26D1ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 2.63 1 MDB#

ADM6315-45D2ARTZR7 –40°C to +125°C 4-Lead SOT-143 RA-4 4.50 20 MA8

ADM6315-31D2ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 3.08 20 M7Y

ADM6315-29D2ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 2.93 20 M7U

ADM6315-26D2ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 2.63 20 MEB#

ADM6315-46D3ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 4.63 140 M84

ADM6315-44D3ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 4.39 140 MFT#

ADM6315-31D3ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 3.08 140 M4G

ADM6315-29D3ARTRL7 −40°C to +125°C 4-Lead SOT-143 RA-4 2.93 140 MFC

ADM6315-26D3ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 2.63 140 MFB#

ADM6315-46D4ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 4.63 1120 M85

ADM6315-44D4ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 4.39 1120 M9H

ADM6315-31D4ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 3.08 1120 M7Z

ADM6315-29D4ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 2.93 1120 M7W

ADM6315-26D4ARTZR7 −40°C to +125°C 4-Lead SOT-143 RA-4 2.63 1120 MGB#

1 Z = RoHS-Compliant Part, # denotes lead-free product may be top or bottom marked.

registered trademarks are the property of their respective owners.

D00081-0-11/18(H)