ANALOG DEVICES ADCMP341, ADCMP343 Service Manual

Dual 0.275% Comparators and Reference

VINA

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FEATURES

400 mV ± 0.275% threshold User programmable hysteresis via resistor string Supply range: 1.7 V to 5.5 V Low quiescent current: 6.5 μA typical Input range includes ground Low input bias current: ±5 nA maximum Open-drain outputs Supports wired-AND connections Input polarities:

ADCMP341 noninverting ADCMP343 inverting

Small SOT-23 package

APPLICATIONS

Portable applications Li-Ion monitoring Handheld instruments LED/relay driving Optoisolator driving Control systems

GENERAL DESCRIPTION

The ADCMP341/ADCMP343 consist of two low power, high accuracy comparators with a 400 mV reference in an 8-lead SOT-23 package. Operating within a supply range of 1.7 V to

5.5 V, the devices only draw 6.5 μA (typical), making them ideal for low voltage system monitoring and portable applications.

Hysteresis is determined using three resistors in a string configurat

ion with the upper and lower tap points connected to the ±INA_U and ±INA_L pins of each comparator, respectively. The state of the outputs of the comparators selects which pin is internally connected to the comparators input. Therefore, a change of state in the comparators output results in one of the inputs being switched in to the comparator and the other being switched out. This provides the user with a fully flexible and accurate method of setting the hysteresis. One input of each comparator is internally connected to the reference. The other input is available externally, via an internal mux, through pins ±INA_U or ±INA_L. The state of the output determines which of these pins is connected at any one time.

The comparator outputs are open-drain with the output stage sinkin

g capability guaranteed greater than 5 mA over temperature. The ADCMP341 has noninverting inputs and the ADCMP343 has inverting inputs. The devices are suitable for portable, commercial, industrial, and automotive applications.

with Programmable Hysteresis

ADCMP341/ADCMP343

FUNCTIONAL BLOCK DIAGRAMS

ADCMP341

+INA_U

+INA_L

INB

+INB_U

+INB_L

–INA_U

–INA_L

INB

–INB_U

–INB_L

OUTA

CH1 2.00V CH2 500mV

Figure 3. Hysteresis prog

MUXMUX

400mV

GND

Figure 1. ADCMP341

ADCMP343

MUXMUX

400mV

GND

Figure 2. ADCMP343

M100ms

rammed to 513 mV @ V

OUTA

OUTB

06500-001

OUTA

OUTB

06500-002

R1 = 22kΩ R2 = 2.2kΩ R3 = 6.2kΩ

on ADCMP341

6500-029

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her 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 registered trademarks are the property of their respective owners.

ADCMP341/ADCMP343

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TABLE OF CONTENTS

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

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

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

Functional Block Diagrams............................................................. 1

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

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

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

Thermal Characteristics .............................................................. 4

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

Pin Configurations and Function Descriptions ........................... 5

REVISION HISTORY

2/07—Revision 0: Initial Version

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

Application Information................................................................ 10

Comparators and Internal Reference ...................................... 10

Power Supply............................................................................... 10

Inputs........................................................................................... 10

Outputs........................................................................................ 10

Programming Hysteresis ........................................................... 10

Layout Recommendations ........................................................ 10

Outline Dimensions....................................................................... 11

Ordering Guide .......................................................................... 11

Rev. 0 | Page 2 of 12

ADCMP341/ADCMP343

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SPECIFICATIONS

VDD = 1.7 V to 5.5 V, −40°C ≤ TA ≤ +125°C, unless otherwise noted.

Table 1.

Parameter Min Typ Max Unit Test Conditions/Comments

THRESHOLDD

Threshold Voltage 396.6 400.4 404.3 mV VDD = 1.7 V, TA = 25°C

399.3 400.4 401.5 mV VDD = 3.3 V, TA = 25°C

398.5 400.4 402.2 mV VDD = 5.5 V, TA = 25°C

395.0 400.4 405.8 mV VDD = 1.7 V, 0°C ≤ TA ≤ 70°C

397.4 400.4 403.4 mV VDD = 3.3 V, 0°C ≤ TA ≤ 70°C

396.9 400.4 403.7 mV VDD = 5.5 V, 0°C ≤ TA ≤ 70°C

391.2 400.4 407.7 mV VDD = 1.7 V, −40°C ≤ TA ≤ +125°C

393.4 400.4 405.6 mV VDD = 3.3 V, −40°C ≤ TA ≤ +125°C

393.2 400.4 405.8 mV VDD = 5.5 V, −40°C ≤ TA ≤ +125°C Threshold Voltage Accuracy ±0.275 % TA = 25°C, VDD = 3.3 V Threshold Voltage Temperature Coefficient 16 ppm/°C

POWER SUPPLY

Supply Current 6.5 9 μA VDD = 1.7 V

7.0 10 μA VDD = 5.5 V INPUT CHARACTERISTICS

Input Bias Current 0.01 5 nA VDD = 1.7 V, VIN = VDD

0.01 5 nA VDD = 1.7 V, VIN = 0.1 V

OPEN-DRAIN OUTPUTS

Output Low Voltage 140 220 mV VDD = 5.5 V, I Output Leakage Current

0.01 1 μA VDD = 1.7 V, V

DYNAMIC PERFORMANCE

High-to-Low Propagation Delay 10 μs VDD = 5 V, VOL = 400 mV Low-to-High Propagation Delay 8 μs VDD = 5 V, VOH = 0.9 × VDD Output Rise Time 0.5 μs VDD = 5 V, VO = (0.1 to 0.9) × VDD Output Fall Time 0.07 μs VDD = 5 V, VO = (0.1 to 0.9) × VDD

RL = 100 kΩ, VO = 2 V swing.

10 mV input overdrive.

VIN = 40 mV overdrive.

RL = 10 kΩ.

2, 4

140 220 mV VDD = 1.7 V, I

0.01 1 μA VDD = 1.7 V, V

= 3 mA

OUT

= 5 mA

OUT

= VDD

= 5.5 V

Rev. 0 | Page 3 of 12

ADCMP341/ADCMP343

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ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

VDD −0.3 V to +6 V ±INA_U, ±INA_L, ±INB_U, ±INB_L −0.3 V to +6 V OUTA, OUTB −0.3 V to +6 V Operating Temperature Range −40°C to +125°C Storage Temperature Range −65°C to +150°C Lead Temperature

Soldering (10 sec) 300°C Vapor Phase (60 sec) 215°C Infrared (15 sec) 220°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.

THERMAL CHARACTERISTICS

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

8-Lead SOT-23 211.5 °C/W

ESD CAUTION

Rev. 0 | Page 4 of 12

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