Analog Devices ADM1810-10AKS, ADM1810-10AKSZ, ADM1810-10ART, ADM1810-10ARTZ, ADM1810-5AKS Schematic [ru]

Microprocessor Reset Circuits

ADM1810-ADM1813/ADM1815-ADM1818

FEATURES

Reliable low cost voltage monitor with reset output

Suitable for monitoring 2.5 V, 3 V, 3.3 V, and 5 V power supply voltages

Reset threshold levels: 4.62 V, 4.35 V, 3.06 V, 2.88 V, 2.55 V, 2.31 V, and 2.18 V typical

Active high and low push-pull output choices: ADM1810, ADM1812, ADM1815, and ADM1817

Open-drain output choices: ADM1811, ADM1813, ADM1816, and ADM1818

Can be used with a manual push-button to generate a reset: ADM1813, ADM1818

Initialization of microprocessor systems with added safety Available in 3-lead SOT-23 and SC70 packages

APPLICATIONS

Microprocessor systems

Computers

Controllers

Intelligent instruments

Automotive systems

GENERAL DESCRIPTION

The ADM181x range of voltage monitoring circuits is used in any application where an electronic system needs to be reset when a voltage increases above or below a predetermined value.

Because of the reset delay time incorporated into the ADM181x series, these devices provide a safe startup for electronic systems. Before a system initializes, the power supply must stabilize.

Using the ADM181x series ensures that there are typically 150 ms for the power supply to stabilize before the system resets and safe system initialization begins.

The ADM181x series of microprocessor reset circuits are available in low cost, space-saving SOT-23 and SC70 packages.

FUNCTIONAL BLOCK DIAGRAMS

	VCC	ADM1810/ADM1815
		RST
		VCC
		TOLERANCE
		BIAS
		150ms
		DELAY
	GND	TC
		REFERENCE
	VCC	ADM1811/ADM1816
		5.5kΩ
		RST

VCC

	TOLERANCE
	BIAS	150ms
		DELAY
GND	TC
	REFERENCE
VCC	ADM1812/ADM1817
		RST
	VCC
	TOLERANCE
	BIAS	150ms
		DELAY
GND	TC
	REFERENCE
VCC	ADM1813/ADM1818
		5.5kΩ
	RESET
		RST
	MONITOR

VCC

TOLERANCE

BIAS

150ms

DELAY

GND

TC

001-00064

REFERENCE

Figure 1.

Rev. D

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ADM1810-ADM1813/ADM1815-ADM1818

TABLE OF CONTENTS
Features ..............................................................................................	1
Applications.......................................................................................	1
General Description .........................................................................	1
Functional Block Diagrams.............................................................	1
Revision History ...............................................................................	2
Specifications.....................................................................................	3
Absolute Maximum Ratings............................................................	4
ESD Caution..................................................................................	4
Pin Configurations and Function Descriptions ...........................	5
REVISION HISTORY
10/05—Rev. C to Rev. D
Updated Format..................................................................	Universal
Added Figure 3...................................................................................	5
Changes to Table 3.............................................................................	5
Updated Outline Dimensions ..........................................................	8
Changes to Ordering Guide .............................................................	9
9/03—REV. B to REV. C.
Added SC70.........................................................................	Universal
Edits to SPECIFICATIONS..............................................................	2
Edits to ORDERING GUIDE...........................................................	4
Updated OUTLINE DIMENSIONS ...............................................	7
2/03—REV. A to REV. B.
Edits to FEATURES...........................................................................	1
Deleted Table I ...................................................................................	1
Edits to SPECIFICATIONS..............................................................	2

Typical Performance Characteristics ..............................................	6
Theory of Operation...........................................................................	7
Timing Diagrams for All Devices ...............................................	7
ADM1813 and ADM1818..............................................................	7
ADM1810, ADM1812, ADM1815, and ADM1817 .....................	7
ADM1811 and ADM1816..............................................................	7
Outline Dimensions ..........................................................................	8
Ordering Guide .............................................................................	9

Edits to ABSOLUTE MAXIMUM RATINGS ...............................	3
Edits to ORDERING GUIDE ..........................................................	3
Added Typical Performance Characteristics .................................	4
Edits to ADM1813 AND ADM1818 section.................................	5
Edits to ADM1810, ADM1812, ADM1815, AND
ADM1817 section..............................................................................	5
Edits to ADM1811 AND ADM1816 section.................................	5
Updated OUTLINE DIMENSIONS ...............................................	6
3/02—REV. 0 to REV. A.
Addition of Table ..............................................................................	1
Edits to ORDERING GUIDE ..........................................................	3
Addition of new text to ADM1813 and ADM1818 section.........	4

Rev. D | Page 2 of 16

ADM1810-ADM1813/ADM1815-ADM1818

SPECIFICATIONS

VCC = full operating range, TA = −40°C to +105°C, unless otherwise noted.

Table 1.

Parameter						Min	Typ	Max	Unit	Conditions/Note
SUPPLY
	Voltage					1		5.5	V	TA = 0°C to 105°C
						1.2		5.5	V	TA = −40°C to +105°C
	Current						9	16	μA	VCC = 5.5 V, VCC > VTH, no load
							4	10	μA	VCC = 3.6 V, VCC > VTH, no load
OUTPUT CURRENT
							350		μA	VCC ≥ VTH (max), reset not asserted (ADM1810/ADM1815)
	RST		Output Source Current
	RST Output Source Current						350		μA	VCC ≤ VTH (min), reset asserted (ADM1812/ADM1817)
						8			mA	VCC ≥ 2.7 V, reset asserted, VOUT = 0.4 V
	RST	Output Sink Current
										(ADM1810/ADM1811/ADM1813/
										ADM1815/ADM1816/ADM1818)
	RST Output Sink Current					8			mA	VCC ≥ 2.7 V, reset not asserted,
										VOUT = 0.4 V (ADM1812/ADM1817)
OUTPUT VOLTAGE						VCC − 0.5	VCC − 0.1		V	(ADM1810/ADM1812/ADM1815/ADM1817)
										@ 0 μA to 500 μA
VCC TRIP POINT
	ADM1810-5, ADM1811-5, ADM1812-5,					4.50	4.62	4.75	V
	ADM1813-5
	ADM1810-10, ADM1811-10, ADM1812-10,					4.25	4.35	4.49	V
	ADM1813-10
	ADM1815-5, ADM1816-5, ADM1817-5,					2.98	3.06	3.15	V
	ADM1818-5
	ADM1815-10, ADM1816-10,					2.80	2.88	2.97	V
	ADM1817-10, ADM1818-10
	ADM1815-20, ADM1816-20,					2.47	2.55	2.64	V
	ADM1817-20, ADM1818-20
	ADM1815-R23, ADM1816-R23,					2.25	2.31	2.37	V
	ADM1817-R23, ADM1818-R23
	ADM1815-R22, ADM1816-R22,					2.12	2.18	2.25	V
	ADM1817-R22, ADM1818-R22
INTERNAL PULL-UP RESISTOR
	ADM1811/ADM1816					3.5	5.5	7.5	kΩ
	ADM1813/ADM1818					3.1	5.5	7.5	kΩ
OUTPUT CAPACITANCE								10	pF
RESET ACTIVE TIME						100	150	250	ms
VCC DETECT TO RESET
	Falling						10		μs	(ADM1810/ADM1811/ADM1812/ADM1813)
							10		μs	(ADM1815/ADM1816/ADM1817/ADM1818)
	Rising					100	150	250	ms	tR = 5 μs
PUSH-BUTTON DETECT TO						1			μs	(ADM1813/ADM1818)
				RST
PUSH-BUTTON RESET						100	150	250	ms	(ADM1813/ADM1818)

Rev. D | Page 3 of 16

ADM1810-ADM1813/ADM1815-ADM1818

ABSOLUTE MAXIMUM RATINGS

TA = 25°C, unless otherwise noted.

Table 2.

Parameter			Rating
VCC			−0.3 V to +6.0 V
Input Current			20 mA
Operating Temperature Range			−40°C to +105°C
θ	JA	Thermal Impedance, SOT-23	270°C/W
θ	JA	Thermal Impedance, SC70	146°C/W
Lead Temperature (Soldering, 10 sec)			300°C
	Vapor Phase (60 sec)		215°C
	Infrared (15 sec)		220°C
Storage Temperature Range			−65°C to +150°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 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.

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

Rev. D | Page 4 of 16

ADM1810-ADM1813/ADM1815-ADM1818

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

RST/RST 1

VCC 1

VCC 2

ADM181x

TOP VIEW 3 GND (Not to Scale)

002-00064

RST/RST 2

ADM181x

TOP VIEW 3 GND (Not to Scale)

014-00064

Figure 2. 3-Lead SOT Pin Configuration

Figure 3. 3-Lead SC70 Pin Configuration

Table 3. Pin Function Descriptions

Pin No.	Pin No.
(SOT)	(SC70)		Mnemonic
1	2
			RST/RST
2	1		VCC
3	3		GND

Function

Reset Output. RST/RST remains active while VCC is below the reset threshold and remains active for 150 ms typical after VCC rises above the reset threshold. Supply Voltage Being Monitored.

0 V Ground Reference for All Signals.

Rev. D | Page 5 of 16

ADM1810-ADM1813/ADM1815-ADM1818

TYPICAL PERFORMANCE CHARACTERISTICS

	10
	8						I	CC @VCC = 5.5V
(μA)	6
															ICC @VCC = 3V
CC
I	4
	2																							00064-003
	0
			–20		0		20			30			50		70		85		100			120
	–40

TEMPERATURE (°C)

Figure 4. Supply Current vs. Temperature

	900
(μs)	800
	700
DELAY
	600
RESET	500						VOD = 20mV
	400
POWER-DOWN
	300
	200	VOD = 125mV
	100									00064-004
	0					VOD = 200mV
		–20	0	20	30	50	70	85	100	120
	–40

TEMPERATURE (°C)

Figure 5. Power-Down Reset Delay vs. Temperature

	380
	370
(ms)	360
TIMEOUT	350
	340
RESET
	330
POWER-UP	320
	310
	300									00064-005
	290
		–20	0	20	30	50	70	85	100	120
	–40

TEMPERATURE (°C)

Figure 6. Power-Up Reset Timeout vs. Temperature

	1.011
THRESHOLD	1.009
	1.007
	1.005				DEVIATION (RISE)
RESET
	1.003
		DEVIATION (FALL)
NORMALIZED	1.001
	0.999
	0.997
										00064-006
	0.995
		–20	0	20	30	50	70	85	100	120
	–40

TEMPERATURE (°C)

Figure 7. Normalized Reset Threshold vs. Temperature

	60
	50
(μs)	40
TRANSIENT
	30
MAXIMUM	20
	10										00064-007
	0
		30	40	60	80	100	200	400	600	800	1000
	10

VTH – VCC (mV)

Figure 8. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive

Rev. D | Page 6 of 16