MAX921CUA+ Maxim Integrated Products, MAX921CUA+ Datasheet

MAX921CUA+

Manufacturer Part Number

MAX921CUA+

Description

IC COMPARATOR W/REF 8-UMAX

Manufacturer

Maxim Integrated Products

Type

with Voltage Referencer

Datasheet

1.MAX922CSA.pdf (17 pages)

Specifications of MAX921CUA+

Number Of Elements

Output Type

CMOS, TTL

Voltage - Supply

2.5 V ~ 11 V, ±1.25 V ~ 5.5 V

Mounting Type

Surface Mount

Package / Case

8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Number Of Channels

1 Channel

Product

Analog Comparators

Offset Voltage (max)

+/- 10 mV

Supply Voltage (max)

11 V

Supply Voltage (min)

2.5 V

Supply Current (max)

3.2 uA

Maximum Power Dissipation

330 mW

Maximum Operating Temperature

+ 70 C

Mounting Style

SMD/SMT

Minimum Operating Temperature

0 C

Comparator Type

General Purpose

No. Of Comparators

Response Time

12Âµs

Ic Output Type

CMOS, TTL

Supply Current

2.5ÂµA

Supply Voltage Range

Â± 1.25V To Â± 5.5V

Amplifier Case Style

ÂµMAX

Rohs Compliant

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 17
Download datasheet (187Kb)

The MAX921–MAX924 single, dual, and quad micro-

power, low-voltage comparators feature the lowest

power consumption available. These comparators draw

less than 4µA supply current over temperature

(MAX921/MAX922), and include an internal 1.182V

±1% voltage reference, programmable hysteresis, and

TTL/CMOS outputs that sink and source current.

Ideal for 3V or 5V single-supply applications, the

MAX921–MAX924 operate from a single +2.5V to +11V

supply (or a ±1.25V to ±5V dual supply), and each

comparator’s input voltage range swings from the

negative supply rail to within 1.3V of the positive

supply.

The MAX921–MAX924’s unique output stage con-

tinuously sources as much as 40mA. And by eliminating

power-supply glitches that commonly occur when com-

parators change logic states, the MAX921–MAX924

minimize parasitic feedback, which makes them easier to

use.

The single MAX921 and dual MAX923 provide a unique

and simple method for adding hysteresis without

feedback and complicated equations, simply by using

the HYST pin and two resistors.

________________________Applications

19-0115; Rev 6; 4/09

µMAX is a registered trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim's website at www.maxim-ic.com.

MAX921

MAX922

MAX923

MAX924

_______________General Description

Battery-Powered Systems

Threshold Detectors

Window Comparators

Oscillator Circuits

Yes

________________________________________________________________ Maxim Integrated Products

Yes

Single/Dual-Supply Comparators

8-Pin

DIP/SO/µMAX

8-Pin

DIP/SO/µMAX

8-Pin

DIP/SO/µMAX

16-Pin

DIP/SO/µMAX

♦ µMAX

♦ Ultra-Low 4µA Max Quiescent Current

♦ Power Supplies:

♦ Input Voltage Range Includes Negative Supply

♦ Internal 1.182V ±1% Bandgap Reference

♦ Adjustable Hysteresis

♦ TTL/CMOS-Compatible Outputs

♦ 12µs Propagation Delay (10mV Overdrive)

♦ No Switching Crowbar Current

♦ 40mA Continuous Source Current

Ordering Information continued at end of data sheet.

*Dice are tested at T

**Contact factory for availability.

____________________________Features

__________Typical Operating Circuit

MAX921CPA

MAX921CSA

MAX921CUA

MAX921C/D

MAX921EPA

MAX921ESA

MAX921MJA

(MAX921/MAX922/MAX923)

Over Extended Temp. Range (MAX921)

PART

Single +2.5V to +11V

Dual ±1.25V to ±5.5V

Package—Smallest 8-Pin SO

Ultra Low-Power,

THRESHOLD DETECTOR

-40°C to +85°C

-55°C to +125°C

= +25°C, DC parameters only.

TEMP RANGE

0°C to +70°C

Ordering Information

IN-

HYST

REF

IN+

V-

V+

MAX921

GND

PIN-PACKAGE

8 Plastic DIP

8 SO

8 µMAX

Dice*

8 Plastic DIP

8 SO

8 CERDIP

OUT

Related parts for MAX921CUA+

MAX921CUA+ Summary of contents

Page 1

... Battery-Powered Systems Threshold Detectors Window Comparators Oscillator Circuits µMAX is a registered trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. Single/Dual-Supply Comparators ____________________________Features ♦ µMAX (MAX921/MAX922/MAX923) ♦ ...

Page 2

Ultra Low-Power, Single/Dual-Supply Comparators ABSOLUTE MAXIMUM RATINGS GND, GND to V-................................-0.3V, +12V Inputs Current, IN_+, IN_-, HYST...............................................20mA Voltage, IN_+, IN_-, HYST................(V+ + 0.3V) to (V- – 0.3V) Outputs Current, REF....................................................................20mA Current, OUT_ .................................................................50mA Voltage, REF ...

Page 3

ELECTRICAL CHARACTERISTICS: 5V OPERATION (continued) ( GND = 0V MIN PARAMETER Output High Voltage Output Low Voltage X REFERENCE (MAX921/MAX923/MAX924 ONLY) Reference Voltage Source Current Sink Current Voltage Noise Note ...

Page 4

Ultra Low-Power, Single/Dual-Supply Comparators ELECTRICAL CHARACTERISTICS: 3V OPERATION (continued) ( GND = 0V MIN PARAMETER Input Common-Mode Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Voltage Noise Hysteresis Input Voltage ...

Page 5

V- = GND +25°C, unless otherwise noted). A REFERENCE VOLTAGE vs. TEMPERATURE 1.22 MILITARY TEMP. RANGE 1.21 EXTENDED TEMP. RANGE 1.20 COMMERCIAL 1.19 TEMP. RANGE 1.18 1.17 1.16 1.15 1.14 -60 -40 - ...

Page 6

Ultra Low-Power, Single/Dual-Supply Comparators ( GND +25°C, unless otherwise noted). A RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES 5 4 100mV 3 20mV 2 50mV 1 10mV 0 0 100 - ...

Page 7

Descriptions (continued) PIN MAX921 MAX922 MAX923 – – – 6 – 6 – – – – PIN NAME MAX924 1 OUTB 2 OUTA INA- 5 ...

Page 8

Ultra Low-Power, Single/Dual-Supply Comparators _______________Detailed Description The MAX921–MAX924 comprise various combinations of a micropower 1.182V reference and a micropower comparator. The Typical Operating Circuit shows the MAX921 configuration, and Figures 1a-1c show the MAX922–MAX924 configurations. Each comparator continuously sources up ...

Page 9

THRESHOLDS IN+ HYSTERESIS IN- BAND VREF - VHYST V HB OUT Figure 2. Threshold Hysteresis Band about 2.2V, although the comparators will continue to operate with a total supply voltage as low as 1V. While the MAX924 has comparators that ...

Page 10

Ultra Low-Power, Single/Dual-Supply Comparators comparator is used with the reference, the combined peak-to-peak noise is about 1mV. This, of course, is much higher than the RMS noise of the individual components. Care should be taken in the layout to avoid ...

Page 11

MOMENTARY 4. MAX921 6 REF 47k 5 HYST 1.1M 4 IN- 100k V- GND 2 1 Figure 5. Auto-off power switch operates on 2.5µA quiescent current. 6. Verify the threshold voltages with these formulas: V rising ...

Page 12

Ultra Low-Power, Single/Dual-Supply Comparators 2. Select R1. The leakage current into INB- is normally under 1nA, so the current through R1 should exceed 100nA for the thresholds to be accurate. R1 values up to about 10MΩ can be used, but ...

Page 13

MAX924 1.182V 8 REF V- 5 INA+ 182k OUTA 1V 4 INA- 7 INB+ 250k OUTB INB- 750mV 6 11 INC+ 250k OUTC 500mV 10 INC- 13 IND+ 250k OUTD 250mV 12 IND- GND 250k ...

Page 14

Ultra Low-Power, Single/Dual-Supply Comparators _________________Pin Configurations TOP VIEW 1 8 GND MAX921 IN- DIP/SO/μMAX 1 8 OUTA MAX922 3 6 INA INA- DIP/SO/μMAX 1 8 OUTA 2 ...

Page 15

Topographies MAX921/MAX922/MAX923 0.059" (1.50mm) DIE PAD MAX921 MAX922 1 GND OUTA IN+ INA+ 5 IN- INA- 6 HYST INB- 7 REF INB ...

Page 16

Ultra Low-Power, Single/Dual-Supply Comparators For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 8 Plastic DIP 16 Plastic DIP µMAX 8 CERDIP 16 CERDIP 16 ______________________________________________________________________________________ Package Information PACKAGE CODE ...

Page 17

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2009 Maxim Integrated Products ...

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