ADM6315-28D4ART-RL7_技术文档

Open-Drain Microprocessor

Supervisory Circuit in 4-Lead SOT-143

Data Sheet

ADM6315

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Specified over temperature

V

GND

CC

Low power consumption (5 μA typical)

Precision voltage monitor of voltages from 2.5 V to 5 V

at 100 mV increments

V

REF

ADM6315

Reset assertion down to V_CC> 1 V

Reset timeout periods: 1 ms, 20 ms, 140 ms,

or 1120 ms (minimum)

RESET

CIRCUITRY

MR

DEBOUNCE

Built-in manual reset

Pin compatible with the ADM811

Available in SOT-143 package

Qualified for automotive applications

Figure 1.

APPLICATIONS

V

CC

SYSTEM POWER

Microprocessor systems

Controllers

Intelligent instruments

Automotive systems

Safety systems

10kΩ

MICROPROCESSOR

SYSTEM

ADM6315

RESET

MR

RESET

GND

Portable instruments

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 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 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.

The ADM6315 is available in a cost- and space-efficient

SOT-143 package.

Included in this circuit is a debounced manual reset input.

RESET

MR

can be activated using an ordinary switch (pulling

low), a low input from another digital device, or a degradation

of the supply voltage.

Rev. G

Document Feedback

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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

ADM6315

Data Sheet

TABLE OF CONTENTS

Features .............................................................................................. 1

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

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

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

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

RESET

Benefits of a Very Accurate

Threshold .............................7

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

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

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

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

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

Automotive Products....................................................................9

REVISION HISTORY

2/03—Rev. A to Rev. B

9/13—Rev. F to Rev. G

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

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

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

12/11—Rev. E to Rev. F

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

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

9/07—Rev. D to Rev. E

10/01—Rev. 0 to Rev. A

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

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

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

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

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

1999—Revision 0: Initial Version

4/06—Rev. C to Rev. D

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

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

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

12/03—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

Rev. G | Page 2 of 12

Data Sheet

ADM6315

SPECIFICATIONS

V_CC= full operating range, T_A= T_MINto T_MAX, V_CCtypical = 5 V, unless otherwise noted.

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

SUPPLY

Operating Voltage

V_CCSupply Current

1

5.5

12

15

10

V

μA

T_A= −40°C to +85°C

5

V_CC= 5.5 V, no load, T_A= −40°C to +85°C

V_CC= 5.5 V, no load, T_A= −40°C to +125°C

V_CC= 3.6 V, no load, T_A= −40°C to +85°C

V_CC= 3.6 V, no load, T_A= −40°C to +125°C

T_A= 25°C

4

12

μA

RESET VOLTAGE THRESHOLD (V_TH)

V_TH− 1.8%

V_TH− 2.5%

V_TH− 3.5%

V_TH

V_TH+ 1.8%

V_TH+ 2.5%

V_TH+ 3.5%

V

T_A= −40°C to +85°C

T_A= −40°C to +125°C

RESET THRESHOLD TEMPERATURE COEFFICIENT

V_CCTO RESET DELAY

60

35

ppm/°C

μs

V_CC= falling at 1 mV/μs

RESET ACTIVE TIMEOUT PERIOD

ADM6315xxD1

1

0.8

20

1.4

28

2

2.4

40

48

280

336

ms

T_A= −40°C to +85°C

T_A= −40°C to +125°C

T_A= −40°C to +85°C

T_A= −40°C to +125°C

T_A= −40°C to +85°C

T_A= −40°C to +125°C

T_A= −40°C to +85°C

T_A= −40°C to +125°C

ADM6315xxD2

ADM6315xxD3

ADM6315xxD4

16

140

112

1120

896

200

1570 2240

2688

MANUAL RESET

Input Threshold

0.8

V

μs

ns

kΩ

V_TH> 4 V (V_IL)

V_TH> 4 V (V_IH)

V_TH< 4 V (V_IL)

V_TH< 4 V (V_IH)

2.4

0.3 × V_CC

1

0.7 × V_CC

Minimum Input Pulse

Glitch Rejection

To Reset Delay

Pull-Up Resistance

RESET OUTPUT

100

500

63

32

100

Output Voltage

0.4

0.3

1

V

μA

V_CC> 4.25 V, I_SINK= 3.2 mA

V_CC> 2.5 V, I_SINK= 1.2 mA

V_CC> 1 V, I_SINK= 80 μA

Output Leakage Current

V_CC> V_TH, RESET deasserted

Rev. G | Page 3 of 12

ADM6315

Data Sheet

ABSOLUTE MAXIMUM RATINGS

T_A= 25°C, unless otherwise noted.

THERMAL RESISTANCE

θ_JAis specified for the worst-case conditions, that is, a device

soldered in a circuit board for surface-mount packages.

Table 2.

Parameter

Rating

Terminal Voltage (with Respect to Ground)

V_CC

All Other Inputs

Table 3. Thermal Resistance

Package Type

−0.3 V to +6 V

θ_JA

Unit

4-Lead SOT-143

330

°C/W

Input Current

V_CC

20 mA

Output Current

RESET

ESD CAUTION

20 mA

Operating Temperature Range

Storage Temperature Range

Lead Temperature (Soldering, 10 sec)

Vapor Phase (60 sec)

Infrared (15 sec)

−40°C to +125°C

−65°C to +160°C

300°C

215°C

220°C

ESD Rating

2.5 kV

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. G | Page 4 of 12

Data Sheet

ADM6315

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

V

1

4

GND

CC

ADM6315

TOP VIEW

(Not to Scale)

2

3

RESET

MR

Figure 3. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

2

GND

RESET

Ground Reference for All Signals, 0 V.

Active Low Logic Output. RESET remains low while V_CCis 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 V_CCrises above the reset threshold

and MR is high.

3

4

MR

V_CC

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.

Monitored Supply Voltage.

Rev. G | Page 5 of 12

ADM6315

Data Sheet

TYPICAL PERFORMANCE CHARACTERISTICS

50

45

10

40

35

30

25

8

V

= 5.5V

CC

6

4

2

0

V

= 3V

= 1V

CC

20

15

10

5

V

0

100 200 300 400 500 600 700 800 900 1000

RESET COMPARATOR OVERDRIVE, (V – V ) (mV)

–40

–20

0

20

40

60

80

100

125

TEMPERATURE (°C)

TH

CC

Figure 4. Supply Current vs. Temperature

RESET

Figure 7. Maximum Transient Duration vs.

Comparator Overdrive

450

400

350

300

250

200

150

100

1.005

1.000

V

= 20mV

OD

0.995

0.990

V

= 125mV

OD

50

0

= 200mV

60

OD

–40

–20

0

20

40

80

100

125

–40

–20

0

20

40

60

80

100

125

TEMPERATURE (°C)

Figure 5. Power-Down Reset Delay vs. Temperature

Figure 8. Normalized Reset Threshold vs. Temperature (V_CCFalling)

12

10

1.06

1.04

1.02

1.00

0.98

0.96

0.94

8

+85°C

6

–40°C

+25°C

4

2

0

2

5

–40

–20

0

20

40

60

80

100

125

1

4

3

TEMPERATURE (°C)

SUPPLY VOLTAGE (V)

Figure 6. Normalized Reset Timeout Period vs. Temperature (V_CCRising)

Figure 9. Supply Current vs. Supply Voltage

Rev. G | Page 6 of 12

Data Sheet

ADM6315

THEORY OF OPERATION

INTERFACING TO OUTPUT OF OTHER DEVICES

MANUAL RESET INPUT

MR

. This

The ADM6315 also provides an additional input,

The ADM6315 series is designed to integrate with as many

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.

RESET

devices as possible. One feature of the ADM6315 is the

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

voltage greater than the V_CCof the ADM6315 input, making it

suitable for use in more diverse applications.

MR

The

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

BENEFITS OF A VERY 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.

MR

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

MR

placing a 1 μF decoupling capacitor between the

input and

ground further improves the glitch immunity of the ADM6315.

V

CC

V

TRIP POINT (MAX)

CC

TRIP POINT

V

TRIP POINT (MAX)

CC

V

CC

V

TRIP POINT

CC

V

TRIP POINT (MIN)

CC

V

TRIP POINT (MIN)

CC

V

CC

V

TO RESET

DELAY

CC

RESET ACTIVE TIMEOUT

RESET

VOL

RESET

Figure 10. V_CCPower-Down/Brownout Timing Diagram

Figure 11. V_CCPower-Up Timing Diagram

DETAILED DESCRIPTION

TRANSIENT IMMUNITY

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.

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.

RESET

When the ADM6315 is powered up, the

ADM6315 remains low for a period typically equal to the

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.

output of the

RESET

Figure 7 shows the

comparator overdrive (the maximum

magnitude of negative-going pulses with respect to the typical

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

When a brownout condition occurs (assuming V_CCis 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.

Rev. G | Page 7 of 12

ADM6315

Data Sheet

OUTLINE DIMENSIONS

3.04

2.90

2.80

1.92 BSC

0.20

BSC

2.64

2.10

4

3

2

1.40

1.30

1.20

1

1.72 REF

1.07

0.90

0.75

1.22

0.80

0.20

0.08

0.100

0.013

8°

0°

0.60

0.50

0.40

0.89

0.76

0.50

0.30

SEATING

PLANE

0.54 REF

COMPLIANT TO JEDEC STANDARDS TO-253-AA

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

(RA-4)

Dimensions shown in millimeters

ORDERING GUIDE

Temperature

Range

Package

Option

Trip

Point

Minimum

Timeout (ms) Branding

Model^{1, 2}

Package Description

−40°C to +125°C

–40°C to +125°C

−40°C to +125°C

4-Lead Small Outline Transistor [SOT-143] RA-4

4.63

4.50

4.39

3.08

2.93

2.63

4.63

4.50

4.39

3.08

1

MDV

M9Q

MDU

M81

MDT

MDG

M7X

MDC

M7T

MDB

MDB#

MEV

MEU

MA8

MET

M80

MEG

M7Y

LLV

ADM6315-46D1ARTRL7

ADM6315-46D1ART-RL

ADM6315-46D1ARTZR7

ADM6315-45D1ARTRL7

ADM6315-45D1ART-RL

ADM6315-45D1ARTZR7

ADM6315-44D1ARTRL7

ADM6315-44D1ART-RL

ADM6315-31D1ARTRL7

ADM6315-31D1ARTZR7

ADM6315-31D1ARTZRL

ADM6315-29D1ARTRL7

ADM6315-29D1ART-RL

ADM6315-29D1ARTZR7

ADM6315-26D1ARTRL7

ADM6315-26D1ART-RL

ADM6315-26D1ARTZR7

ADM6315-26D1ARTZRL

ADM6315-46D2ARTRL7

ADM6315-46D2ART-RL

ADM6315-45D2ARTRL7

ADM6315-45D2ART-RL

ADM6315-45D2ARTZR7

ADM6315-44D2ARTRL7

ADM6315-44D2ART-RL

ADM6315-44D2ARTZR7

ADM6315-31D2ARTRL7

ADM6315-31D2ARTZR7

ADM6315-31D2ARTZRL

ADM6315W31D2ARTZR7

1

20

Rev. G | Page 8 of 12

Data Sheet

ADM6315

Temperature

Range

Package

Option

Trip

Point

Minimum

Timeout (ms) Branding

Model^{1, 2}

Package Description

−40°C to +125°C

–40°C to +125°C

−40°C to +125°C

–40°C to +125°C

4-Lead Small Outline Transistor [SOT-143] RA-4

2.93

2.63

4.63

4.50

4.39

3.08

2.93

2.63

4.63

4.50

4.39

3.08

2.93

2.63

20

MEC

M7U

MEB

ADM6315-29D2ARTRL7

ADM6315-29D2ART-RL

ADM6315-29D2ARTZR7

ADM6315-26D2ARTRL7

ADM6315-26D2ARTZR7

ADM6315-26D2ARTZRL

ADM6315-46D3ARTRL7

ADM6315-46D3ART-RL

ADM6315-46D3ARTZR7

ADM6315-45D3ARTRL7

ADM6315-45D3ART-RL

ADM6315-45D3ARTZR7

ADM6315-44D3ARTRL7

ADM6315-44D3ARTZR7

ADM6315-44D3ARTZRL

ADM6315-31D3ARTRL7

ADM6315-31D3ART-RL

ADM6315-31D3ARTZR7

ADM6315-31D3ARTZRL

ADM6315-29D3ARTRL7

ADM6315-29D3ART-RL

ADM6315-29D3ARTZR7

ADM6315-26D3ARTZR7

ADM6315-26D3ARTZRL

ADM6315-46D4ARTRL7

ADM6315-46D4ART-RL

ADM6315-46D4ARTZR7

ADM6315-45D4ARTRL7

ADM6315-45D4ART-RL

ADM6315-44D4ARTRL7

ADM6315-44D4ARTZR7

ADM6315-44D4ARTZRL

ADM6315-31D4ARTRL7

ADM6315-31D4ART-RL

ADM6315-31D4ARTZR7

ADM6315-29D4ARTRL7

ADM6315-29D4ART-RL

ADM6315-29D4ARTZR7

ADM6315-26D4ARTRL7

ADM6315-26D4ART-RL

ADM6315-26D4ARTZR7

ADM6315-26D4ARTZRL

20

MEB#

MFV

M84

20

140

1120

MFU

M82

MFT

MFT#

MFG

M4G

MFC

M7V

MFB#

MGV

M85

MGU

MGT

M9H

MGG

M7Z

MGC

M7W

MGB

MGB#

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

²W = Qualified for Automotive Applications.

AUTOMOTIVE PRODUCTS

The ADM6315W model is available with controlled manufacturing to support the quality and reliability requirements of automotive

applications. Note that these automotive models may have specifications that differ from the commercial models; therefore, designers

should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for use in

automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to

obtain the specific Automotive Reliability reports for these models.

Rev. G | Page 9 of 12

ADM6315

NOTES

Data Sheet

Rev. G | Page 10 of 12

Data Sheet

NOTES

ADM6315

Rev. G | Page 11 of 12

ADM6315

NOTES

Data Sheet

registered trademarks are the property of their respective owners.

D00081-0-9/13(G)

Rev. G | Page 12 of 12


型号：	ADM6315-28D4ART-RL7
厂家：	ADI
描述：	IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4, PLASTIC, SOT-143, 4 PIN, Power Management Circuit 光电二极管
文件：	总12页 (文件大小：202K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ADM6315-28D4ART-RL7 [ADI]

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