ADM6339_技术文档

Quad Voltage Microprocessor

Supervisory Circuit

ADM6339

FUNCTIONAL BLOCK DIAGRAM

FEATURES

IN

1

Accurate monitoring of up to four power supply voltages

6 factory-set threshold options: −5.0 V, +1.8 V, +2.5 V, +3.0 V,

+3.3 V, and +5.0 V

Adjustable input threshold options: −0.5 V ( 2.0% accuracy),

+0.62 V ( 0.8% accuracy), and +1.23 V

200 ms typical reset timeout

Open-drain RESET output (10 μA internal pull-up)

Reset output stage: active low, valid to IN₁= 1 V or IN₂= 1 V

Low power consumption (55 μA)

IN

1

2

3

4

5V PULLUP

IN

2

RESET

200ms

TIMEOUT

Glitch immunity

Specified from −40°C to +85°C

ADM6339

V

REF

6-lead SOT-23 package

Figure 1.

APPLICATIONS

Telecommunications

Microprocessor systems

Data storage equipment

Servers/workstations

GENERAL DESCRIPTION

active low output asserts, triggering a system reset. The output

is open drain with a weak internal pull-up to the monitored IN₂

supply of typically 10 μA. After all voltages exceed the selected

threshold level, the reset signal remains low for the reset

timeout period (200 ms typical).

The ADM6339 is a high accuracy supervisory circuit capable of

monitoring up to four system supply voltages.

The ADM6339 incorporates a variety of internally pretrimmed

undervoltage threshold options for monitoring −5.0 V, +1.8 V,

+2.5 V, +3.0 V, +3.3 V, and +5.0 V supply voltages. Tolerance levels

of 5% and 10% are available. The device is also available

with one to three adjustable threshold options. The adjustable

voltage threshold options are +1.23 V, +0.62 V, and −0.5 V. See

the Ordering Guide section for a list and description of all

available options.

The ADM6339 output remains valid as long as IN₁or IN₂exceeds

1 V. Unused monitored inputs should not be allowed to float or

to be grounded; instead, they should be connected to a supply

voltage greater than their specified threshold voltages.

The ADM6339 is available in a 6-lead SOT-23 package. The

device operates over the extended temperature range of −40°C

to +85°C.

If a monitored power supply voltage decreases below the mini-

mum voltage threshold (or rises above the maximum voltage

threshold for the −0.5 V and −5.0 V input options), a single

Rev. A

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 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 registeredtrademarks arethe 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

ADM6339

TABLE OF CONTENTS

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

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

Theory of Operation .........................................................................8

Input Configuration......................................................................8

Monitoring Negative Voltages < −5.0 V.....................................8

User Adjustable Threshold Options ...........................................8

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 4

ESD Caution.................................................................................. 4

Pin Configuration and Function Descriptions............................. 5

RESET

Output Configuration .....................................................9

Outline Dimensions....................................................................... 10

Ordering Guide .......................................................................... 10

REVISION HISTORY

10/10—Rev. 0 to Rev. A

Added Figure 19.............................................................................. 10

6/09—Revision 0: Initial Version

Rev. A | Page 2 of 12

ADM6339

SPECIFICATIONS

V_IN2= 1.0 V to 5.5 V, T_A= −40°C to +85°C, unless otherwise noted. Typical values are V_IN2= 3.0 V to 3.3 V, T_A= 25°C.

Table 1.

Parameter

Min

Typ

Max

Units

Test Conditions/Comments

1, 2

OPERATING VOLTAGE RANGE (V_IN2

INPUT CURRENT

)

1.0

5.5

V

IN_xInput Current

25

55

40

115

μA

V_INx= nominal input voltage for 1.8 V, 2.5 V, and 5.0 V supplies.

V_IN2= nominal input voltage for 3.0 V and 3.3 V supplies. V_IN2is

also the device power supply. The supply splits into 25 μA for

the resistor divider and 30 μA for other circuits.

−0.1

+0.1

1.5

−20

+0.1

−5

μA

V_INx= 0 V to V_IN2(input threshold voltage = 1.23 V).

V_IN1= 1.5 V (ADM6339K and ADM6639L models only).

V_INx= −5.0 V (IN_xinput threshold voltage = −5.0 V).

V_INx= 0.62 V (IN_xinput threshold voltage = 0.62 V).

V_INx= −0.5 V (IN_xinput threshold voltage = −0.5 V).

0.4

−15

−0.1

−1

−3

THRESHOLD VOLTAGE

Fixed Threshold Voltage (V_TH)

V_INxDecreasing

4.50

4.25

3.00

2.85

2.70

2.55

2.13

1.53

−4.75

−4.50

4.63

4.38

3.08

2.93

2.78

2.63

2.19

1.58

−4.63

−4.38

4.75

4.50

3.15

3.00

2.85

2.70

2.25

1.62

−4.50

−4.25

V

5.0 V (−5% tolerance) threshold.

5.0 V (−10% tolerance) threshold.

3.3 V (−5% tolerance) threshold.

3.3 V (−10% tolerance) threshold.

3.0 V (−5% tolerance) threshold.

3.0 V (−10% tolerance) threshold.

2.5 V (−10% tolerance) threshold.

1.8 V (−10% tolerance) threshold.

−5.0 V (+5% tolerance) threshold.

−5.0 V (+10% tolerance) threshold.

V_INxIncreasing

Adjustable Threshold Voltage (V_TH)

V_INxDecreasing

1.20

1.23

1.26

V

0.615

−0.497

0.620

−0.487 −0.477

0.625

V

V_INxIncreasing

−0.5 V threshold.

RESET THRESHOLD HYSTERESIS (V_HYST

)

0.3

0.47

60

% V_TH

ppm/°C

IN₄, ADM6339Q model.

RESET THRESHOLD TEMPERATURE

COEFFICIENT (TCV_TH)

IN_Xto RESET DELAY (t_RD)

30

μs

V_INx= V_THto (V_TH− 50 mV) for all inputs except −0.5 V and −5.0 V;

V_INx= V_THto (V_TH+ 50 mV) for −5.0 V and −0.5 V inputs only.

RESET TIMEOUT PERIOD (t_RP)

140

200

280

0.4

ms

V

RESET

V_IN2= 5.0 V, I_SINK= 2 mA.

OUTPUT LOW (V_OL)

V

V_IN2= 2.5 V, I_SINK= 1.2 mA.

V_IN2= V_IN1= 1 V, I_SINK= 50 μA.

V_IN1=1V, V_IN2= 0 V, I_SINK= 20 μA

V_IN1=0 V, V_IN2= 1 V, I_SINK= 20 μA

RESET

0.8 × V_IN2

V

RESET

not asserted.

OUTPUT HIGH (V_OH)

V

_IN2≥ 2.55 V, I_SOURCE= 6 μA,

10

μA

RESET

V_IN2≥ 2.55 V, not asserted.

OUTPUT HIGH SOURCE

CURRENT (I_OH)

¹The device is powered by Input IN₂.

2

RESET

The

output is guaranteed to be in the correct state for IN₁or IN₂down to 1 V.

Rev. A | Page 3 of 12

ADM6339

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter

Table 3. Thermal Resistance

Package Type

Rating

θ_JA

Unit

V_CC, RESET, GND

−0.3 V to +6 V

20 mA

6-Lead SOT-23

169.5

°C/W

Continuous RESET Current

IN_x(Positive Reset Threshold)

IN₄(Negative Reset Threshold, −5 V)

IN₄ADM6339Q Model (Negative Reset

Threshold, −0.5 V)

−0.3 V to +6 V

−6 V to +0.3 V

−2 V to +0.3 V

ESD CAUTION

Storage Temperature Range

Operating Temperature Range

Lead Temperature (10 sec)

Junction Temperature

−65°C to +125°C

−40°C to +85°C

300°C

135°C

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. A | Page 4 of 12

ADM6339

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

IN

1

2

3

6

5

4

RESET

1

2

3

ADM6339

GND

TOP VIEW

(Not to Scale)

IN

4

Figure 2. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic Description

1

2

3

4

5

6

IN₁

IN₂

IN₃

IN₄

GND

RESET

Monitored Input Voltage 1.

Monitored Input Voltage 2. IN₂is the power supply input for the ADM6339.

Monitored Input Voltage 3.

Monitored Input Voltage 4.

Ground.

Active Low RESET Output. RESET goes low when an input drops below the specified threshold (or above in the

case of the −0.5 V and −5.0 V input options). After all inputs rise above the threshold voltage, RESET remains low

for 200 ms (typical) before going high. RESET is open drain with a weak internal pull-up to IN₂, typically 10 μA.

Rev. A | Page 5 of 12

ADM6339

TYPICAL PERFORMANCE CHARACTERISTICS

V_IN2= V_CC= 3.0 V, T_A= 25°C, unless otherwise noted.

60

58

56

54

52

50

48

46

44

100

90

80

70

60

50

40

30

20

10

0

RESET ASSERTED ABOVE THIS LINE

V

= 3.3V

= 3V

IN2

42

40

–40

–15

10

35

60

85

0

100 200 300 400 500 600 700 800 900 1000

RESET THRESHOLD OVERDRIVE (mV)

TEMPERATURE (ºC)

Figure 3. IN₂Input Current vs. Temperature

Figure 6. Maximum IN_xTransient Duration vs. Reset Threshold Overdrive

120

100

80

60

40

20

0

100

90

80

70

60

50

40

30

20

10

0

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

0

100 200 300 400 500 600 700 800 900 1000

RESET THRESHOLD OVERDRIVE (mV)

IN VOLTAGE (V)

2

RESET

Figure 7.

Delay vs. Reset Threshold Overdrive (IN_xDecreasing)

Figure 4. IN₂Input Current vs. IN₂Voltage

214

212

210

208

206

204

202

0.05

0

–0.05

–0.10

–0.15

–0.20

5V

1.8V

–40

–15

10

35

60

85

–40

–20

0

20

40

60

80

TEMPERATURE (ºC)

TEMPERATURE (°C)

Figure 8. Reset Timeout Delay vs. Temperature

Figure 5. Normalized Threshold Error vs. Temperature

Rev. A | Page 6 of 12

ADM6339

IN

x

C3

IN

x

C3

RESET

C2

C2 BwL DC1M C3 BwL DC1M

Timebase 0.0µs Trigger

10.0 µs/div STOP

200kS 2.0 GS/s EDGE NEGATIVE

0.0µs

–520mV

C2 BwL DC1M C3 BwL DC1M

Timebase –101ms Trigger C3 DC

2.00V/div

1.00V/div

2.00V/div

50.0 ms/div Normal

1.0 MS/s Edge

680mV

Positive

–6.000V offset

2.040V offset

–6.000V offset

2.000V offset

500kS

RESET

Timeout Delay (50 ms/Div)

Figure 9.

Pull-Up and Pull-Down Response (10 μs/Div)

Figure 11.

–0.490

–0.495

–0.500

–0.505

–0.510

0.630

0.625

0.620

0.615

0.610

–40

–20

0

20

40

60

80

–40

–20

0

20

40

60

80

TEMPERATURE (°C)

Figure 10. 0.62 V Input Voltage Trip Threshold vs. Temperature

Figure 12. −0.5 V Input Voltage Trip Threshold vs. Temperature

Rev. A | Page 7 of 12

ADM6339

THEORY OF OPERATION

The ADM6339 is a compact, low power supervisory circuit that

is capable of monitoring up to four voltages in a multisupply

application.

For an input monitor current error of <1%, the resistor network

current should be greater than or equal to 2 mA (for I_IN4= 20 μA

maximum). Set R₂= 2.5 kΩ. Calculate R₁based on the desired

V

_INTHreset threshold voltage, using the following equation:

The device includes several factory-set voltage threshold options

f or m on it or i n g − 5 . 0 V, + 1 . 8 V, + 2 . 5 V, + 3 . 0 V, + 3 . 3 V, a n d + 5 . 0 V

supplies. The ADM6339 is available with one to three adjustable

threshold options. The adjustable voltage threshold options

available are +1.23 V, +0.62 V, and −0.5 V. See the Ordering Guide

section for a list and description of all available options.

R₁= R₂((V_INTH/V_TH) − 1)

where:

R₂≤ 2.49 kΩ.

V

_INTHis the desired threshold voltage.

V_THis the internal threshold voltage.

INPUT CONFIGURATION

For example, when monitoring a nominal voltage of −12 V,

_INTH= −11.1 V, V_TH= −4.63 V, and R₂= 2.49 kΩ. Therefore,

using the previous equation, R₁= 3.48 kΩ.

V

Built-in hysteresis improves the ADM6339’s immunity to short

input transients, without noticeably reducing the threshold

accuracy. The internal comparators each have a hysteresis of

0.3% with respect to the reset threshold voltage. (The IN₄input

of the ADM6339Q model has a hysteresis of 0.47% with respect

to its reset threshold voltage of −0.487 V.)

ADM6339

R

2

1

R

Monitored inputs are resistant to short power supply glitches.

Figure 6 depicts the ADM6339 glitch immunity data. To

increase noise immunity in noisy applications, place a 0.1 ꢀF

capacitor between the IN₂input and ground. Adding capacitance

to IN₁, IN₃, and IN₄also improves noise immunity.

V

INTH

Figure 14. Negative Voltage Monitoring

USER ADJUSTABLE THRESHOLD OPTIONS

The ADM6339 offers the choice of three adjustable IN_xinput

threshold voltages: +1.23 V, +0.62 V, or −0.5 V.

ADM6339

IN

1

2

3

4

When using an adjustable threshold of 1.23 V (typical), to

monitor a voltage greater than 1.23 V, connect a resistor divider

network to the device as shown in Figure 15. V_INTH, the desired

threshold voltage, can be expressed as

MONITORED

SUPPLIES

RESET

MICROPROCESSOR

GND

V

_INTH= 1.23 V((R₁+ R₂)/(R₂))

Figure 13. Typical Applications Circuit

The ADM6339 has a guaranteed input current of 0.1 μA on its

1.23 V adjustable input. Resistor values up to 100 kΩ can be

used for R₂with <1% error.

IN₂must always be used for normal operation because it is the

device’s power supply input. Do not allow unused monitor

inputs to float or to be grounded. Unused IN₃or IN₄inputs with

positive thresholds can be connected directly to the IN₂input.

Unused IN₄options with negative thresholds must be tied to a

more negative supply.

V

INTH

ADM6339

R

1

2

R

MONITORING NEGATIVE VOLTAGES < −5.0 V

V

= 1.23V

REF

A number of ADM6339 models include a pretrimmed threshold

option to monitor −5.0 V voltage levels. Use a low impedance

resistor divider network similar to that shown in Figure 14 to

monitor supplies more negative than −5.0 V.

Figure 15. Setting the 1.23 V Adjustable Monitor

The same approach is taken when using the 0.62 V (typical)

adjustable threshold input. Use the following equation to solve

for the values of R₁and R₂:

The current through the external resistor divider should be

greater than the input current for the −5.0 V monitor options.

V

_INTH= 0.62 V((R₁+ R₂)/(R₂))

The 0.62 V (typical) adjustable threshold input offers high

threshold accuracy of 0.8%.

Rev. A | Page 8 of 12

ADM6339

When monitoring a voltage more negative than −0.5 V, a

scheme similar to that previously described in the Monitoring

Negative Voltages < −5.0 V section is used. For an input

monitor current error of <1%, the resistor network current

should be ≥500 μA (for I_IN4= 5 μA maximum). Calculate R₁

based on the desired V_INTHreset threshold voltage, using the

following equation:

RESET

is open drain with a weak internal pull-up to IN₂of

10 ꢀA (typical). Many applications that interface with other

logic devices do not require an external pull-up resistor.

However, if an external pull-up resistor is required and it is

connected to a voltage ranging from 0 V to 5.5 V, the resistor

overdrives the internal pull-up. Reverse current flow from the

external pull-up voltage to IN₂is prevented by the internal

circuitry.

R₁= R₂((V_INTH/V_TH) − 1)

IN = 3.3V

5V

2

where V_INTHis the desired threshold voltage and V_THis the

internal threshold voltage, −0.487 V (typical).

V

CC

100kΩ

RESET OUTPUT CONFIGURATION

ADM6339

RESET

The

output asserts low if a monitored INx voltage

drops below its voltage threshold (or goes above its associated

threshold in the case of the −0.5 V and −5.0 V input options).

After all voltages exceed their associated threshold level, the

reset signal remains low for the reset timeout period, t_RP

(200 ms typical).

Figure 17. Interfacing with a Different Logic Supply Voltage

IN

V

x

TH

t_RD

t_RP

90%

RESET

10%

RESET

Figure 16. ADM6339

Timing

Rev. A | Page 9 of 12

ADM6339

OUTLINE DIMENSIONS

3.00

2.90

2.80

6

1

5

2

4

3

3.00

2.80

2.60

1.70

1.60

1.50

PIN 1

INDICATOR

0.95 BSC

1.90

BSC

1.30

1.15

0.90

0.20 MAX

0.08 MIN

1.45 MAX

0.95 MIN

0.55

0.45

0.35

0.15 MAX

0.05 MIN

10°

4°

0°

SEATING

PLANE

0.60

BSC

0.50 MAX

0.30 MIN

COMPLIANT TO JEDEC STANDARDS MO-178-AB

Figure 18. 6-Lead Small Outline Transistor Package [SOT-23]

(RJ-6)

Dimensions shown in millimeters

ROUND SPROCKET HOLES

PIN 1 MARKER

DIRECTION OF FEED

Figure 19. ADM6339 Reel Orientation

ORDERING GUIDE

Nominal Input Voltage (V)

Tolerance Temperature

(%) Range

Adj (1.23) 10

Adj (1.23)

Adj (1.23) 10

Adj (1.23)

Adj (1.23) 10

Adj (1.23)

Adj (1.23) 10

Package

Description

Package

Option

Model^{1, 2}

IN₁

IN₂IN₃

3.3 2.5

3.3 1.8

3.0 2.5

3.0 1.8

3.3 2.5

IN₄

Branding

MBF

MBH

MBJ

MBK

MBL

MBM

MBN

MBP

MBQ

MBR

MBS

MBU

MB6

MB7

MB8

MB5

MBX

ADM6339AARJZ-RL7 5.0

ADM6339BARJZ-RL7 5.0

ADM6339CARJZ-RL7 5.0

ADM6339DARJZ-RL7 5.0

ADM6339EARJZ-RL7

ADM6339FARJZ-RL7

ADM6339GARJZ-RL7 5.0

ADM6339HARJZ-RL7 5.0

ADM6339IARJZ-RL7

ADM6339JARJZ-RL7

ADM6339KARJZ-RL7

ADM6339LARJZ-RL7

ADM6339MARJZ-RL7 5.0

ADM6339NARJZ-RL7 5.0

ADM6339OARJZ-RL7 5.0

−40°C to +85°C 6-Lead SOT-23 RJ-6

5

5.0

5

Adj (1.23)

1.8

5

10

5

5.0

Adj (1.23) 3.3 2.5

Adj (1.23) 10

Adj (1.23)

5

3.0 Adj (1.23) −5.0

10

5

10

5

3.0 Adj (1.23) −5.0

3.3 Adj (1.23) −5.0

ADM6339PARJZ-RL7

5.0

ADM6339QARJZ-RL7 Adj (0.62) 3.3 Adj (0.62) Adj (−0.5) 10

¹Z = RoHS Compliant Part.

²Nominal input voltage is specified with 10% tolerance.

Rev. A | Page 10 of 12

ADM6339

NOTES

Rev. A | Page 11 of 12

ADM6339

NOTES

registered trademarks are the property of their respective owners.

D08169-0-10/10(A)

Rev. A | Page 12 of 12


型号：	ADM6339
厂家：	ADI
描述：	Quad Voltage Microprocessor Supervisory Circuit
文件：	总12页 (文件大小：203K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ADM6339 [ADI]

相关型号：

ADM6339AARJZ-RL7

ADM6339BARJZ-RL7

ADM6339CARJZ-RL7

ADM6339DARJZ-RL7

ADM6339EARJZ-RL7

ADM6339FARJZ-RL7

ADM6339GARJZ-RL7

ADM6339HARJZ-RL7

ADM6339IARJZ-RL7

ADM6339JARJZ-RL7

ADM6339KARJZ-RL7

ADM6339LARJZ-RL7