Rainbow Electronics MAX934 User Manual

19-0194; Rev 1; 2/97

Ultra Low-Power, Low-Cost

Comparators with 2% Reference

_______________General Description

The MAX931-MAX934 single, dual, and quad micropower, low-voltage comparators plus an on-board 2% accurate reference feature the lowest power consumption available. These comparators draw less than 4µA supply current over temperature (MAX931), and include an internal

1.182V ±2% voltage reference, programmable hysteresis, and TTL/CMOS outputs that sink and source current.

Ideal for 3V or 5V single-supply applications, the MAX931-MAX934 operate from a single +2.5V to +11V supply (or a ±1.25V to ±5V dual supply), and each comparator’s input voltage range extends from the negative supply rail to within 1.3V of the positive supply.

The MAX931-MAX934’s unique output stage continuously sources as much as 40mA. And by eliminating powersupply glitches that commonly occur when comparators change logic states, the MAX931-MAX934 minimize parasitic feedback, which makes them easier to use.

The single MAX931 and dual MAX932/MAX933 provide a unique and simple method for adding hysteresis without feedback and complicated equations, using the HYST pin and two resistors.

For applications that require increased precision with similar power requirements, see the MAX921-MAX924 data sheet. These devices include a 1% precision reference.

PART

INTERNAL

REFERENCE

COMPARATORS

PER

PACKAGE

INTERNAL

HYSTERESIS

Yes1YesMAX931

Yes2YesMAX932

Yes2YesMAX933

No4YesMAX934

PACK-

AGE

8-Pin DIP/SO/ µMAX

16-Pin DIP/SO

____________________________Features

♦ Ultra-Low 4µA Max Quiescent Current

Over Extended Temp. Range (MAX931)

♦ Power Supplies:

Single +2.5V to +11V Dual ±1.25V to ±5.5V

♦ Input Voltage Range Includes Negative Supply ♦ Internal 1.182V ±2% Bandgap Reference ♦ Adjustable Hysteresis ♦ TTL-/CMOS-Compatible Outputs ♦ 12µs Propagation Delay (10mV Overdrive) ♦ No Switching Crowbar Current ♦ 40mA Continuous Source Current ♦ Available in Space-Saving µMAX Package

______________Ordering Information

PIN-PACKAGETEMP. RANGEPART

MAX931CPA

Ordering Information continued on last page.

For similar devices guaranteed over the military temp. range, see

the MAX921-MAX924 data sheet. The MAX931, MAX933, and MAX934 are pin-compatible with the 1% accurate MAX921, MAX923, and MAX924, respectively. The MAX932 and MAX922 are not

pin-compatible.

8 Plastic DIP0°C to +70°C 8 SO0°C to +70°CMAX931CSA 8 µMAX0°C to +70°CMAX931CUA 8 Plastic DIP-40°C to +85°CMAX931EPA 8 SO-40°C to +85°CMAX931ESA

__________Typical Operating Circuit

IN+

3

IN-

4

V+

OUT

MAX931-MAX934

________________________Applications

Battery-Powered Systems Threshold Detectors Window Comparators Oscillator Circuits Alarm Circuits

________________________________________________________________

HYST

5

REF

THRESHOLD DETECTOR

MAX931

V-

Maxim Integrated Products

GND

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

Ultra Low-Power, Low-Cost Comparators with 2% Reference

ABSOLUTE MAXIMUM RATINGS

V+ to V-, V+ to 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 ....................................(V+ + 0.3V) to (V- – 0.3V)

Voltage, OUT_ (MAX931/934).....(V+ + 0.3V) to (GND – 0.3V)

Voltage, OUT_ (MAX932/933)..........(V+ + 0.3V) to (V- – 0.3V)

OUT_ Short-Circuit Duration (V+ ≤ 5.5V) ...............Continuous

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

MAX931-MAX934

ELECTRICAL CHARACTERISTICS—5V Operation

(V+ = 5V, V- = GND = 0V, TA= T

MIN

to T

, unless otherwise noted.)

MAX

Continuous Power Dissipation (TA= +70°C)

8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW

8-Pin SO (derate 5.88mW/°C above +70°C)................471mW

8-Pin µMAX (derate 4.1mW/°C above +70°C).............330mW

16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW

16-Pin SO (derate 8.70mW/°C above +70°C)................696mW

Operating Temperature Ranges:

MAX93_C_ _ .......................................................0°C to +70°C

MAX93_E_ _.....................................................-40°C to +85°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

PARAMETER

POWER REQUIREMENTS

Supply Voltage Range

Supply Current IN+ = IN- + 100mV µA

COMPARATOR

Input Offset Voltage

Input Leakage Current (HYST) Input Common-Mode Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Voltage Noise Hysteresis Input Voltage Range REF – 0.05 REF V

(Note 1)

VCM= 2.5V IN+ = IN- = 2.5V, C/E temp. ranges MAX931, MAX932, MAX933

V- to (V+ – 1.3V) V+ = 2.5V to 11V 100Hz to 100kHz MAX931, MAX932, MAX933

TA= +25°C, 100pF load

CONDITIONS

MAX931, HYST = REF

MAX932, HYST = REF

MAX933, HYST = REF

MAX934

TA= +25°C C/E temp. ranges 4 TA= +25°C C/E temp. ranges 6 TA= +25°C C/E temp. ranges 6 TA= +25°C C/E temp. ranges 8.5

Overdrive = 10mV Overdrive = 100mV

MIN TYP MAX UNITS

2.5 11 V

2.5 3.2

3.1 4.5

5.5 6.5

±10 mV ±0.01 ±5 ±0.02 nA

0.1 1.0 mV/V

0.1 1.0 mV/V 20 µV

nAInput Leakage Current (IN-, IN+)

µsResponse Time

VV- V+ – 1.3

RMS

2 _______________________________________________________________________________________

Ultra Low-Power, Low-Cost

Comparators with 2% Reference

ELECTRICAL CHARACTERISTICS—5V Operation (continued)

(V+ = 5V, V- = GND = 0V, TA= T

PARAMETER

Output Low Voltage

REFERENCE

Sink Current

Voltage Noise

Note 1: MAX934 comparators work below 2.5V, see

MIN

to T

, unless otherwise noted.)

MAX

CONDITIONS

C/E temp. ranges, I

= 1.8mA

OUT

C temp. range

E temp. range 1.147 1.217 TA= +25°C C/E temp. ranges 6

TA= +25°C C/E temp. ranges 4

100Hz to 100kHz 100 µV

Low-Voltage Operation

OUT

= 17mA

MAX932,

MAX933

MAX931,

MAX934

section for more details.

MAX931-MAX934

MIN TYP MAX UNITS

VOutput High Voltage V+ – 0.4

V- + 0.4

GND + 0.4

1.158 1.182 1.206 VReference Voltage

15 25

µASource Current

815

µA

RMS

ELECTRICAL CHARACTERISTICS—3V Operation

(V+ = 3V, V- = GND = 0V, TA= T

PARAMETER

POWER REQUIREMENTS

Supply Current IN+ = (IN- + 100mV)

COMPARATOR

Input Offset Voltage

Input Leakage Current (HYST)

MIN

to T

, unless otherwise noted.)

MAX

CONDITIONS

MAX931,

HYST = REF

MAX932,

HYST = REF

MAX933,

HYST = REF

MAX934

VCM= 1.5V IN+ = IN- = 1.5V, C/E temp. ranges MAX931, MAX932, MAX933

MIN TYP MAX UNITS

TA= +25°C C/E temp. ranges 3.8 TA= +25°C C/E temp. ranges 5.8 TA= +25°C C/E temp. ranges TA= +25°C C/E temp. ranges

2.4 3.0

3.4 4.3

5.8

5.2 6.2

8.0

±10 mV ±0.01 ±1 nAInput Leakage Current (IN-, IN+) ±0.02 nA

µA

_______________________________________________________________________________________ 3

Ultra Low-Power, Low-Cost Comparators with 2% Reference

ELECTRICAL CHARACTERISTICS—3V Operation (continued)

(V+ = 3V, V- = GND = 0V, TA= T

MIN

to T

, unless otherwise noted.)

MAX

PARAMETER

Input Common-Mode Voltage Range VV- V+ – 1.3 Common-Mode Rejection Ratio 0.2 1 mV/V Power-Supply Rejection Ratio Voltage Noise Hysteresis Input Voltage Range REF – 0.05 REF V

V- to (V+ – 1.3V) V+ = 2.5V to 11V 100Hz to 100kHz MAX931, MAX932, MAX933

TA= +25°C, 100pF load

C/E temp. ranges, I

MAX931-MAX934

Output Low Voltage

REFERENCE

Reference Voltage

Voltage Noise

C/E temp. ranges, I

C temp. range E temp. range 1.147 1.217 TA= +25°C C/E temp. ranges TA= +25°C C/E temp. ranges

100Hz to 100kHz 100 µV

CONDITIONS

= 10mA

OUT

= 0.8mA

OUT

Overdrive = 10mV Overdrive = 100mV

MAX932,

MAX933 MAX931

MIN TYP MAX UNITS

0.1 1 mV/V 20 µV

V- + 0.4

GND + 0.4

1.158 1.182 1.206

15 25

6 815 4

RMS

µsResponse Time

VOutput High Voltage V+ – 0.4

µASource Current

µASink Current

RMS

4 _______________________________________________________________________________________

Ultra Low-Power, Low-Cost

Comparators with 2% Reference

__________________________________________Typical Operating Characteristics

(V+ = 5V, V- = GND, TA = +25°C, unless otherwise noted.)

OUTPUT VOLTAGE LOW

OUTPUT VOLTAGE HIGH vs.

vs. LOAD CURRENT

2.5

2.0

V+ = 3V

020

48 16

LOAD CURRENT (mA)

(V)

1.5

1.0

0.5

0.0

V+ = 5V

MAX921/4-TOC1

(V)

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

V+ = 5V

010 30 50

REFERENCE VOLTAGE 

vs. TEMPERATURE

1.22

1.21

1.20

1.19

1.18

1.17

1.16

REFERENCE VOLTAGE (V)

1.15

1.14

EXTENDED TEMP. RANGE

COMMERCIAL 

TEMP. RANGE

-60 -20 60 140

-40 0 8040 120

20 100

TEMPERATURE (°C)

MAX921/924-TOC4

SUPPLY CURRENT vs. TEMPERATURE

4.5 IN+ = IN- + 100mV

4.0

V+ = 5V, V- = -5V

3.5

3.0

SUPPLY CURRENT (µA)

2.5

2.0

V+ = 5V, V- = 0V

-60 140

MAX933

SUPPLY CURRENT vs. TEMPERATURE

5.0

IN+ = IN- +100mV

4.5

4.0

3.5

3.0

SUPPLY CURRENT (µA)

2.5

2.0

-60 140

V+ = 5V, V- = 0V

V+ = 3V, V- = 0V

-20 20 100 TEMPERATURE (°C)

MAX921/924-TOC7

SUPPLY CURRENT vs. TEMPERATURE

IN+ = (IN- + 100mV)

V+ = 5V, V- = -5V

SUPPLY CURRENT (µA)

-60 140

LOAD CURRENT

V+ = 3V

20 40

LOAD CURRENT (mA)

MAX931

V+ = 3V, V- = 0V

-20 20 100 TEMPERATURE (°C)

MAX934 

V+ = 5V, V- = 0V

V+ = 3V, V- = 0V

-20 20 100

TEMPERATURE (°C)

MAX921/924-TOC2

REFERENCE OUTPUT VOLTAGE (V)

MAX921/924-TOC5

SUPPLY CURRENT (µA)

MAX921/924-TOC8

SUPPLY CURRENT (µA)

REFERENCE OUTPUT VOLTAGE vs.

OUTPUT LOAD CURRENT

1.190

1.185

1.180

1.175

1.170

1.165

1.160

1.155

V+ = 5V  V+ = 3V

0 5 15 25

SINK

SOURCE

OR

10 20

OUTPUT LOAD CURRENT (µA)

MAX932 

SUPPLY CURRENT vs. TEMPERATURE

5.0

IN+ = IN- +100mV

4.5

4.0

3.5

3.0

2.5

2.0

V+ = 5V, V- = 0V

V+ = 3V, V- = 0V

-20 20 100

-60 140 TEMPERATURE (°C)

MAX934

SUPPLY CURRENT vs. 

LOW SUPPLY VOLTAGES

IN+ = IN- +100mV

0.1

0.01

1.0 2.0 2.5

1.5

SINGLE-SUPPLY VOLTAGE (V)

MAX931-MAX934

MAX921/924-TOC3

MAX921/924-TOC6

MAX921/924-TOC9

_______________________________________________________________________________________

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Rainbow Electronics MAX934 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual