Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Comparator Multi-purpose CMOS, Push pull, TTL SOIC 8 N

General Description

The MAX941/MAX942/MAX944 are single/dual/quad high-

speed comparators optimized for systems powered from a

3V or 5V supply. These devices combine high speed, low

power, and rail-to-rail inputs. Propagation delay is 80ns,

while supply current is only 350μA per comparator.

The input common-mode range of the MAX941/MAX942/

MAX944 extends beyond both power-supply rails. The

outputs pull to within 0.4V of either supply rail without

external pullup circuitry, making these devices ideal for

interface with both CMOS and TTL logic. All input and

output pins can tolerate a continuous short-circuit fault

condition to either rail. Internal hysteresis ensures clean

output switching, even with slow-moving input signals.

The MAX941 features latch enable and device shutdown.

The single MAX941 and dual MAX942 are offered in a

tiny μMAX

package. Both the single and dual MAX942

are available in 8-pin DIP and SO packages. The quad

MAX944 comes in 14-pin DIP and narrow SO packages.

Applications

● 3V/5V Systems

● Battery-Powered Systems

● Threshold Detectors/Discriminators

● Line Receivers

● Zero-Crossing Detectors

● Sampling Circuits

Features

● Available in μMAX Package

● Optimized for 3V and 5V Applications

(Operation Down to 2.7V)

● Fast, 80ns Propagation Delay (5mV Overdrive)

● Rail-to-Rail Input Voltage Range

● Low 350μA Supply Current per Comparator

● Low, 1mV Offset Voltage

● Internal Hysteresis for Clean Switching

● Outputs Swing 200mV of Power Rails

● CMOS/TTL-Compatible Outputs

● Output Latch (MAX941 Only)

● Shutdown Function (MAX941 Only)

Ordering Information continued at end of data sheet.

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

19-0229; Rev 10; 9/14

T = Tape and reel.

PART TEMP RANGE

PIN-

PACKAGE

MAX941CPA 0°C to +70°C 8 PDIP

MAX941CSA 0°C to +70°C 8 SO

MAX941EPA -40°C to +85°C 8 PDIP

MAX941ESA -40°C to +85°C 8 SO

MAX941EUA-T -40°C to +85°C 8 µMAX

MAX941AUA-T -40°C to +125°C 8 µMAX

N.C.

OUT

GND

LATCH

SHDN

IN-

PDIP/SO/µMAX

OUTB

INB-

INB

GND

INA

INA-

OUTA

MAX942

PDIP/SO/µMAX

OUTD

IND-

IND

GND

INA

INA-

OUTA

INC

INC-

OUTC

OUTB

INB-

INB

PDIP/SO

MAX941

MAX944

TOP VIEW

A D

B C

MAX941/MAX942/

MAX944

High-Speed, Low-Power, 3V/5V, Rail-to-Rail,

Single-Supply Comparators

Pin Congurations

Ordering Information

Summary of content (12 pages)

PAGE 1
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators General Description The MAX941/MAX942/MAX944 are single/dual/quad highspeed comparators optimized for systems powered from a 3V or 5V supply. These devices combine high speed, low power, and rail-to-rail inputs. Propagation delay is 80ns, while supply current is only 350μA per comparator. The input common-mode range of the MAX941/MAX942/ MAX944 extends beyond both power-supply rails. The outputs pull to within 0.
PAGE 2
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators Absolute Maximum Ratings Power-Supply Ranges Supply Voltage V+ to GND..............................................+6.5V Differential Input Voltage..........................-0.3V to (V+ + 0.3V) Common-Mode Input Voltage...................-0.3V to (V+ + 0.3V) LATCH Input (MAX941 only)....................-0.3V to (V+ + 0.3V) SHDN Control Input (MAX941 only) .........-0.3V to (V+ + 0.3V) Current Into Input Pins.......
PAGE 3
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators Electrical Characteristics (continued) (V+ = 2.7V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 14) PARAMETER SYMBOL CONDITIONS V+ = 3V Supply Current per Comparator ICC V+ = 5V MIN TYP MAX MAX941 380 600 MAX942/MAX944 350 500 MAX941 430 700 MAX942/MAX944 400 600 12 60 MAX941 1.0 4.2 MAX942/MAX944 1.0 3.
PAGE 4
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators Typical Operating Characteristics (V+ = 3.0V, TA = +25°C, unless otherwise noted.) 50 RS = 10Ω CLOAD = 15pF 25 75 50 100 80 RS = 10Ω CLOAD = 15pF VOD = 5mV -60 -40 -20 0 60 RS = 10Ω CLOAD = 15pF VOD = 5mV 2 MAX941 toc07 TA = +25°C 3 4 5 10 100 1000 SINK CURRENT (µA) www.maximintegrated.com 10,000 500 400 TA = +125°C TA = +25°C TA = -55°C 2.8 2.7 2.
PAGE 5
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators Typical Operating Characteristics (continued) (V+ = 3.0V, TA = +25°C, unless otherwise noted.) 1.50 TA = +25°C 1.25 1.
PAGE 6
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators Typical Operating Characteristics (continued) (V+ = 3.0V, TA = +25°C, unless otherwise noted.
PAGE 7
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators fixed internal hysteresis eliminates these resistors and the equations needed to determine appropriate values. VTRIP+ VHYST VTRIP- VIN+ VOS = VTRIP+ + VTRIP- VIN- = 0V 2 VOH COMPARATOR OUTPUT VOL Figure 1. Input and Output Waveform, Noninverting Input Varied Detailed Description The MAX941/MAX942/MAX944 single-supply comparators feature internal hysteresis, high speed, and low power.
PAGE 8
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators tS tH V+ DIFFERENTIAL INPUT VOLTAGE VOS 0V tLPW V+ LATCH V+ 2 0V VOH OUT tPD tLPD V+ 2 VOL Figure 2. MAX941 Timing Diagram with Latch Operator Output Stage Circuitry The MAX941/MAX942/MAX944 contain a current-driven output stage as shown in Figure 4. During an output transition, ISOURCE or ISINK is pushed or pulled to the output pin.
PAGE 9
MAX941/MAX942/ MAX944 IN+ 4.1kΩ High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators TO INTERNAL CIRCUITRY MAX941 MAX942 MAX944 VCC MAX941 MAX942 MAX944 ISOURCE OUTPUT TO INTERNAL CIRCUITRY IN– 4.1kΩ ISINK 0 Figure 3. Input Stage Circuitry Figure 4. Output Stage Circuitry VDD = 3.3V V+ = 3V SERIAL DIGITAL INPUT VREFC VDD 10kΩ SDI 8-BIT DAC COAX LINE MAX512 20kΩ 3V MAX941 DACOUTC GND VSS MAX941 0V CLEAN DIGITAL SIGNAL 20kΩ ANALOG IN Figure 5. 3.
PAGE 10
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators Ordering Information (continued) PART TEMP RANGE PINPACKAGE MAX942MSA/PR -55°C to +125°C 8 SO MAX942CPA 0°C to +70°C 8 PDIP MAX942CSA 0°C to +70°C 8 SO MAX942EPA -40°C to +85°C 8 PDIP MAX942ESA -40°C to +85°C 8 SO MAX942EUA-T -40°C to +85°C 8 µMAX MAX942AUA-T -40°C to +125°C 8 µMAX MAX944CPD 0°C to +70°C 14 PDIP MAX944CSD 0°C to +70°C 14 SO MAX944EPD -40°C to +85°C 14 PDIP MAX944ESD
PAGE 11
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
PAGE 12
MAX941/MAX942/ MAX944 High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 8 12/08 Added SO package diagram and removed transistor count 10 9 3/09 Corrected Ordering Information for MAX944ESD 10 10 9/14 Corrected Electrical Characteristics and removed automotive reference from Features 1, 3 DESCRIPTION For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim I