ADM6315_技术文档

Open-Drain Microprocessor

Supervisory Circuit in 4-Lead SOT-143

a

ADM6315

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Superior Upgrade for MAX6315

Specified Over Temperature

Low Power Consumption (5 ␮A Typ)

Precision Voltage Monitor of Voltages from 2.5 V to

5 V at 100 mV Increments

V

GND

CC

V

REF

ADM6315

Reset Assertion Down to V_CC> 1 V

Built-In Manual Reset

Pin Compatible with the ADM811

RESET

CIRCUITRY

APPLICATIONS

DEBOUNCE

MR

Microprocessor Systems

Controllers

Intelligent Instruments

Automotive Systems

Safety Systems

Portable Instruments

V

CC

SYSTEM POWER

GENERAL DESCRIPTION

The ADM6315 is a reliable voltage monitoring device that is

suitable for use in most voltage monitoring applications.

10k⍀

␮P

SYSTEM

ADM6315

MR

RESET

The ADM6315 is designed to monitor as little as a 1.8% degra-

dation of a power supply voltage. Voltages that can be moni-

tored by the ADM6315 are all voltages (at 100 mV increments)

from 2.5 V to 5 V.

GND

Figure 1. Typical Operating Circuit

Included in this circuit is a debounced Manual Reset input.

Reset can be activated using an ordinary switch (pulling MR

low), by a low input from another digital device or by a degra-

dation of the supply voltage. The manual reset function is very

useful, especially if the circuit in which the ADM6315 is oper-

ating, enters into a state that can only be detected by the user.

Allowing the user to manually reset a system can reduce the

damage or danger that could be otherwise caused by an out of

control or locked-up system.

The ADM6315 comes in a cost and space efficient SOT-143

package.

REV. 0

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

(V = Full Operating Range, T = T_MINto T_MAX, V_CCTyp = 5 V unless otherwise noted)

ADM6315–SPECIFICATIONS

CC

A

P

arameter

Min

Typ

Max

Units

Test Conditions/Comments

SUPPLY

Operating Voltage

V_CCSupply Current

1.0

5.5

12

V

µA

T_A= 0°C to +70°C

V_CC= 5.5 V (No Load)

V_CC= 3.6 V (No Load)

5

4

1

RESET VOLTAGE THRESHOLD (V_TH

)

V_TH– 1.8% V_TH

V_TH– 2.5%

V_TH+ 1.8%

V_TH+ 2.5%

V

T_A= +25°C

T_A= 0°C to +70°C

RESET THRESHOLD TEMPERATURE

COEFFICIENT

60

35

ppm/°C

µs

V_CCTO RESET DELAY

V_CC= Falling at 1 mV/µs

RESET ACTIVE TIMEOUT PERIOD

1

20

140

1120

1.4

28

200

1570

2.6

53

370

2960

ms

ADM6315xxD1

ADM6315xxD2

ADM6315xxD3

ADM6315xxD4

MANUAL RESET

Input Threshold

0.8

V

V_TH> 4.0 V (V_IL)

2.4

V

µs

ns

kΩ

V_TH> 4.0 V (V_IH)

V_TH< 4.0 V (V_IL)

V_TH< 4.0 V (V_IH)

0.3 V_CC

1

0.7 V_CC

Minimum Input Pulse

Glitch Rejection

To Reset Delay

100

500

63

Pull-Up Resistance

32

100

RESET OUTPUT

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 mA

Output Leakage Current

V_CC> V_TH, RESET Deasserted

NOTES

¹The ADM6315 is available with preset reset threshold values from 2.5 V to 5 V at 100 mV increments.

Specifications subject to change without notice.

–2–

REV. 0

ADM6315

ABSOLUTE MAXIMUM RATINGS*

(T_A= +25°C unless otherwise noted)

PIN CONFIGURATION

Terminal Voltage (With Respect to Ground)

V_CC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V

All Other Inputs . . . . . . . . . . . . . . . . .–0.3 V to V_CC+ 0.3 V

Input Current

4

3

1

2

V

GND

CC

ADM6315

TOP VIEW

(Not to Scale)

V_CC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA

RESET

MR

Output Current

RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA

Power Dissipation (T_A= +70°C)

RT-4, SOT-143

PIN FUNCTION DESCRIPTIONS

Derate by 4 mW/°C above +70°C . . . . . . . . . . . 320 mW

θ_JAThermal Impedance . . . . . . . . . . . . . . . . . . . . 330°C/W

Operating Temperature Range . . . . . . . . . . . –40°C to +85°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +160°C

Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . .+300°C

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . .+215°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . .+220°C

ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.5 kV

Pin Mnemonic

Function

1

2

GND

RESET

0 V. Ground reference for all signals.

Active Low Logic Output. RESET re-

mains low while V_CCis below the reset

threshold or when MR is low, RESET

then remains low for either 1 ms (min),

20 ms (min), 140 ms (min) or 1120 ms

(min) after V_CCrises above the reset

threshold and MR is high.

Manual Reset. This active low de-

bounced input will ignore input pulses of

100 ns (typical) and is guaranteed to

accept input pulses of greater than 1 µs.

Leave floating when not used.

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those listed in the operational

sections of this specification is not implied. Exposure to absolute maximum ratings

for extended periods of time may affect device reliability.

3

4

MR

V_CC

Monitored supply voltage.

ORDERING GUIDE

Temperature

Range

Package

Description

Package

Option

Model

ADM6315–xxxxxxx-xx*

–40°C to +85°C

Plastic Surface Mount

SOT-143

*Refer to Tables I to IV.

REV. 0

–3–

–Typical Performance Characteristics

ADM6315

800

700

600

500

400

300

200

100

0

10

8

6

4

2

0

V

= 5.5

CC

V

= 3

= 1

CC

V

–100

0

–40

–20

0

20

40

60

80

100

125

4

8

20

60

100

400

800 1200 1600

TH CC

TEMPERATURE – ؇C

RESET COMPARATOR OVERDRIVE, V -V – mV

Figure 2. Supply Current vs. Temperature

Figure 5. Maximum Transient Duration vs. RESET Com-

parator Overdrive

450

1.005

1.000

400

350

300

250

200

150

100

V

= 20mV

OD

0.995

0.990

V

= 125mV

OD

50

0

V

= 200mV

OD

–40

–20

0

20

40

60

80

100

125

–40

–20

0

20

40

60

80

100

125

TEMPERATURE – ؇C

Figure 3. Power-Down Reset Delay vs. Temperature

Figure 6. Normalized Reset Threshold vs. Temperature

(V_CCFalling)

1.06

1.04

1.02

1.00

0.98

0.96

0.94

12

+85؇C

10

8

6

–40؇C

+25؇C

4

2

0

–40

–20

0

20

40

60

80

100

125

0

1

2

3

4

5

TEMPERATURE – ؇C

SUPPLY VOLTAGE – V

Figure 4. Normalized Reset Timeout Period vs. Tempera-

ture (V_CCRising)

Figure 7. Supply Current vs. Supply Voltage

–4–

REV. 0

ADM6315

The MR input will (typical) ignore negative going pulses faster

than 100 ns and 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 used in a noisy environment, then

placing a 1 µF decoupling capacitor between the MR input and

ground will further improve the glitch immunity of the ADM6315.

INTERFACING TO OTHER DEVICES

OUTPUT

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 V_CCof the ADM6315 input making it

suitable for use in more diverse applications.

V

TRIP-POINT (MAX)

CC

THE BENEFITS OF A VERY ACCURATE RESET

THRESHOLD

V

TRIP-POINT

CC

V

TRIP-POINT (MIN)

CC

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.

V

CC

RESET ACTIVE TIMEOUT

V

CC

RST

V

TRIP-POINT(MAX)

CC

V

TRIP-POINT

CC

V

TRIP-POINT(MIN)

CC

Figure 9. V_CCPower-Up Timing Diagram

V

TO RESET

DELAY

CC

RST

TRANSIENT IMMUNITY

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

good immunity to negative going transients (Figure 5). Because

of this characteristic, the ADM6315 is suitable for use in noisy

environments.

VOL

Figure 8. V_CCPower-Down/Brownout Timing Diagram

Figure 5 shows the reset comparator overdrive (the maximum

magnitude of negative going pulses with respect to the typical

reset threshold) versus pulse duration, without causing a reset.

DETAILED DESCRIPTION

The ADM6315 is designed to protect the integrity of a systems

operation by ensuring the proper operation of the system during

power-up, power-down and brownout conditions.

When the ADM6315 is powered-up (depending on the selected

reset active timeout), the RESET output of the ADM6315 will

remain low for a period typically equalling the Reset Active

Timeout Period. This is designed to give the system time to

power-up correctly and for the power supply to stabilize before

any devices are brought out of reset and allowed to begin ex-

ecuting instructions. Initializing a system in this way provides a

more reliable start-up for microprocessor systems.

When a brownout condition occurs (assuming V_CCis falling at

1 mV/µs), the ADM6315 will produce a reset in typically 35 µs.

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

reset together before any part of the systems’ voltage falls below

its recommended operating voltage. This 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 as either a means for the system operator to

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

reset the system.

REV. 0

–5–

ADM6315

Table I.

Table II.

Min

Timeout

(ms)

Min

Timeout

(ms)

Trip-

Point

Trip-

Point

Model*

Brand

Model*

Brand

ADM6315-50D1ART-RL7 5.00

ADM6315-50D1ART-RL 5.00

ADM6315-49D1ART-RL7 4.90

ADM6315-49D1ART-RL 4.90

ADM6315-48D1ART-RL7 4.80

ADM6315-48D1ART-RL 4.80

ADM6315-47D1ART-RL7 4.70

ADM6315-47D1ART-RL 4.70

ADM6315-46D1ART-RL7 4.63

ADM6315-46D1ART-RL 4.63

ADM6315-45D1ART-RL7 4.50

ADM6315-45D1ART-RL 4.50

ADM6315-44D1ART-RL7 4.39

ADM6315-44D1ART-RL 4.39

ADM6315-43D1ART-RL7 4.30

ADM6315-43D1ART-RL 4.30

ADM6315-42D1ART-RL7 4.20

ADM6315-42D1ART-RL 4.20

ADM6315-41D1ART-RL7 4.10

ADM6315-41D1ART-RL 4.10

ADM6315-40D1ART-RL7 4.00

ADM6315-40D1ART-RL 4.00

ADM6315-39D1ART-RL7 3.90

ADM6315-39D1ART-RL 3.90

ADM6315-38D1ART-RL7 3.80

ADM6315-38D1ART-RL 3.80

ADM6315-37D1ART-RL7 3.70

ADM6315-37D1ART-RL 3.70

ADM6315-36D1ART-RL7 3.60

ADM6315-36D1ART-RL 3.60

ADM6315-35D1ART-RL7 3.50

ADM6315-35D1ART-RL 3.50

ADM6315-34D1ART-RL7 3.40

ADM6315-34D1ART-RL 3.40

ADM6315-33D1ART-RL7 3.30

ADM6315-33D1ART-RL 3.30

ADM6315-32D1ART-RL7 3.20

ADM6315-32D1ART-RL 3.20

ADM6315-31D1ART-RL7 3.08

ADM6315-31D1ART-RL 3.08

ADM6315-30D1ART-RL7 3.00

ADM6315-30D1ART-RL 3.00

ADM6315-29D1ART-RL7 2.93

ADM6315-29D1ART-RL 2.93

ADM6315-28D1ART-RL7 2.80

ADM6315-28D1ART-RL 2.80

ADM6315-27D1ART-RL7 2.70

ADM6315-27D1ART-RL 2.70

ADM6315-26D1ART-RL7 2.63

ADM6315-26D1ART-RL 2.63

ADM6315-25D1ART-RL7 2.50

1

MDZ

MDY

MDX

MDW

MDV

MDU

MDT

MDS

MDR

MDQ

MDP

MDO

MDN

MDM

MDL

MDK

MDJ

ADM6315-50D2ART-RL7 5.00

ADM6315-50D2ART-RL 5.00

ADM6315-49D2ART-RL7 4.90

ADM6315-49D2ART-RL 4.90

ADM6315-48D2ART-RL7 4.80

ADM6315-48D2ART-RL 4.80

ADM6315-47D2ART-RL7 4.70

ADM6315-47D2ART-RL 4.70

ADM6315-46D2ART-RL7 4.63

ADM6315-46D2ART-RL 4.63

ADM6315-45D2ART-RL7 4.50

ADM6315-45D2ART-RL 4.50

ADM6315-44D2ART-RL7 4.39

ADM6315-44D2ART-RL 4.39

ADM6315-43D2ART-RL7 4.30

ADM6315-43D2ART-RL 4.30

ADM6315-42D2ART-RL7 4.20

ADM6315-42D2ART-RL 4.20

ADM6315-41D2ART-RL7 4.10

ADM6315-41D2ART-RL 4.10

ADM6315-40D2ART-RL7 4.00

ADM6315-40D2ART-RL 4.00

ADM6315-39D2ART-RL7 3.90

ADM6315-39D2ART-RL 3.90

ADM6315-38D2ART-RL7 3.80

ADM6315-38D2ART-RL 3.80

ADM6315-37D2ART-RL7 3.70

ADM6315-37D2ART-RL 3.70

ADM6315-36D2ART-RL7 3.60

ADM6315-36D2ART-RL 3.60

ADM6315-35D2ART-RL7 3.50

ADM6315-35D2ART-RL 3.50

ADM6315-34D2ART-RL7 3.40

ADM6315-34D2ART-RL 3.40

ADM6315-33D2ART-RL7 3.30

ADM6315-33D2ART-RL 3.30

ADM6315-32D2ART-RL7 3.20

ADM6315-32D2ART-RL 3.20

ADM6315-31D2ART-RL7 3.08

ADM6315-31D2ART-RL 3.08

ADM6315-30D2ART-RL7 3.00

ADM6315-30D2ART-RL 3.00

ADM6315-29D2ART-RL7 2.93

ADM6315-29D2ART-RL 2.93

ADM6315-28D2ART-RL7 2.80

ADM6315-28D2ART-RL 2.80

ADM6315-27D2ART-RL7 2.70

ADM6315-27D2ART-RL 2.70

ADM6315-26D2ART-RL7 2.63

ADM6315-26D2ART-RL 2.63

ADM6315-25D2ART-RL7 2.50

ADM6315-25D2ART-RL 2.50

20

MEZ

MEY

MEX

MEW

MEV

MEU

MET

MES

MER

MEQ

MEP

MEO

MEN

MEM

MEL

MEK

MEJ

MDJ

MDI

MEJ

MEI

MDH

MDG

MDF

MDE

MDD

MDC

MDB

MDA

MEH

MEG

MEF

MEE

MED

MEC

MEB

MEA

ADM6315-25D1ART-RL

2.50

NOTES

ADM6315-xxxxxxx-RL7 are in reels of 3,000 pieces.

ADM6315-xxxxxxx-RL are in reels of 10,000 pieces.

*Only available in reels.

–6–

REV. 0

ADM6315

Table III.

Table IV.

Min

Timeout

(ms)

Min

Timeout

(ms)

Trip-

Point

Trip-

Point

Model*

Brand

Model*

Brand

ADM6315-50D3ART-RL7

ADM6315-50D3ART-RL

ADM6315-49D3ART-RL7

ADM6315-49D3ART-RL

ADM6315-48D3ART-RL7

ADM6315-48D3ART-RL

ADM6315-47D3ART-RL7

ADM6315-47D3ART-RL

ADM6315-46D3ART-RL7

ADM6315-46D3ART-RL

5.00

4.90

4.80

4.70

4.63

140

MFZ

MFY

MFX

MFW

MFV

MFU

MFT

MFS

MFR

MFQ

MFP

MFO

MFN

MFM

MFL

MFK

MFJ

ADM6315-50D4ART-RL

ADM6315-50D4ART-RL7

ADM6315-49D4ART-RL

ADM6315-49D4ART-RL7

ADM6315-48D4ART-RL

ADM6315-48D4ART-RL7

ADM6315-47D4ART-RL

ADM6315-47D4ART-RL7

ADM6315-46D4ART-RL

ADM6315-46D4ART-RL7

ADM6315-45D4ART-RL

ADM6315-45D4ART-RL7

ADM6315-44D4ART-RL

ADM6315-44D4ART-RL7

ADM6315-43D4ART-RL

ADM6315-43D4ART-RL7

ADM6315-42D4ART-RL

ADM6315-42D4ART-RL7

ADM6315-41D4ART-RL

ADM6315-41D4ART-RL7

ADM6315-40D4ART-RL

ADM6315-40D4ART-RL7

ADM6315-39D4ART-RL

ADM6315-39D4ART-RL7

ADM6315-38D4ART-RL

ADM6315-38D4ART-RL7

ADM6315-37D4ART-RL

ADM6315-37D4ART-RL7

ADM6315-36D4ART-RL

ADM6315-36D4ART-RL7

ADM6315-35D4ART-RL

ADM6315-35D4ART-RL7

ADM6315-34D4ART-RL

ADM6315-34D4ART-RL7

ADM6315-33D4ART-RL

ADM6315-33D4ART-RL7

ADM6315-32D4ART-RL

ADM6315-32D4ART-RL7

ADM6315-31D4ART-RL

ADM6315-31D4ART-RL7

ADM6315-30D4ART-RL

ADM6315-30D4ART-RL7

ADM6315-29D4ART-RL

ADM6315-29D4ART-RL7

ADM6315-28D4ART-RL

ADM6315-28D4ART-RL7

ADM6315-27D4ART-RL

ADM6315-27D4ART-RL7

ADM6315-26D4ART-RL

ADM6315-26D4ART-RL7

ADM6315-25D4ART-RL

ADM6315-25D4ART-RL7

5.00

4.90

4.80

4.70

4.63

4.50

4.39

4.30

4.20

4.10

4.00

3.90

3.80

3.70

3.60

3.50

3.40

3.30

3.20

3.08

3.00

2.93

2.80

2.70

2.63

2.50

1120

MGZ

MGY

MGX

MGW

MGV

MGU

MGT

MGS

MGR

MGQ

MGP

MGO

MGN

MGM

MGL

MGK

MGJ

ADM6315-45D3ART-RL7 4.50

ADM6315-45D3ART-RL

ADM6315-44D3ART-RL7

ADM6315-44D3ART-RL

ADM6315-43D3ART-RL7

ADM6315-43D3ART-RL

ADM6315-42D3ART-RL7

ADM6315-42D3ART-RL

ADM6315-41D3ART-RL7

ADM6315-41D3ART-RL

ADM6315-40D3ART-RL7

ADM6315-40D3ART-RL

ADM6315-39D3ART-RL7

ADM6315-39D3ART-RL

ADM6315-38D3ART-RL7

ADM6315-38D3ART-RL

ADM6315-37D3ART-RL7

ADM6315-37D3ART-RL

ADM6315-36D3ART-RL7

ADM6315-36D3ART-RL

ADM6315-35D3ART-RL7

ADM6315-35D3ART-RL

ADM6315-34D3ART-RL7

ADM6315-34D3ART-RL

ADM6315-33D3ART-RL7

ADM6315-33D3ART-RL

ADM6315-32D3ART-RL7

ADM6315-32D3ART-RL

ADM6315-31D3ART-RL7

ADM6315-31D3ART-RL

ADM6315-30D3ART-RL7

ADM6315-30D3ART-RL

ADM6315-29D3ART-RL7

ADM6315-29D3ART-RL

ADM6315-28D3ART-RL7

ADM6315-28D3ART-RL

ADM6315-27D3ART-RL7

ADM6315-27D3ART-RL

ADM6315-26D3ART-RL7

ADM6315-26D3ART-RL

ADM6315-25D3ART-RL7

ADM6315-25D3ART-RL

4.50

4.39

4.30

4.20

4.10

4.00

3.90

3.80

3.70

3.60

3.50

3.40

3.30

3.20

3.08

3.00

2.93

2.80

2.70

2.63

2.50

MFJ

MFI

MGJ

MGI

MFH

MFG

MFF

MFE

MFD

MFC

MFB

MFA

MGH

MGG

MGF

MGE

MGD

MGC

MGB

MGA

NOTES

All parts in bold are ex-stock. Consult factory for availability of orders.

ADM6315-xxxxxxx-RL7 are in reels of 3,000 pieces.

ADM6315-xxxxxxx-RL are in reels of 10,000 pieces.

*Only available in reels.

REV. 0

–7–

ADM6315

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

4-Lead Plastic Surface Mount Package

(SOT-143)

0.079 (2.00)

0.071 (1.80)

4

1

3

2

0.055 (1.40)

0.047 (1.20)

0.098 (2.50)

0.083 (2.10)

PIN 1

0.080 (2.03)

0.070 (1.78)

0.120 (3.05)

0.105 (2.67)

7؇

0.004 (0.10)

0.001 (0.03)

0.040 (1.02)

0.031 (0.79)

8؇

0؇

0.0059 (0.089)

0.0035 (0.15)

0.037 (0.94)

0.030 (0.77)

0.021 (0.54)

0.015 (0.38)

0.010 (0.25)

0.005 (0.13)

SEATING

PLANE

–8–

REV. 0


型号：	ADM6315
厂家：	ADI
描述：	Open-Drain Microprocessor Supervisory Circuit in 4-Lead SOT-143 漏极开路微处理器监控电路采用4引脚SOT -143 微处理器监控
文件：	总8页 (文件大小：99K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ADM6315 [ADI]

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