Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Comparator Multi-purpose CMOS, Push pull, Rail-to-rail, TTL SC 70 5

19-1547; Rev 4; 12/12

MAX9075/MAX9077

Low-Cost, Ultra-Small, 3µA

Single-Supply Comparators

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

General Description

The MAX9075/MAX9077 single/dual comparators are

optimized for 3V and 5V single-supply applications.

These comparators have a 580ns propagation delay and

consume just 3µA per comparator. The combination of

low-power, single-supply operation down to 2.1V, and

ultra-small footprint makes these devices ideal for all

portable applications.

The MAX9075/MAX9077 have a common-mode input

voltage range of -0.2V to V

- 1.2V. Unlike many com-

parators, there is no differential clamp between the

inputs, allowing the differential input voltage range to

extend rail-to-rail. All inputs and outputs tolerate a con-

tinuous short-circuit fault condition to either rail.

The design of the output stage limits supply-current

surges while switching (typical of many other compara-

tors), minimizing power consumption under dynamic

conditions. Large internal push-pull output drivers allow

rail-to-rail output swing with loads up to 2mA, making

these devices ideal for interface with TTL/CMOS logic.

The MAX9075 single comparator is available in 5-pin

SC70 and SOT23 packages, while the MAX9077

dual comparator is available in 8-pin SOT23, µMAX

and SO packages.

Applications

Battery-Powered Systems

Threshold Detectors/Discriminators

Keyless Entry Systems

IR Receivers

Digital Line Receivers

Features

o 580ns Propagation Delay from Only 3µA

o 2.1V to 5.5V Single-Supply Operation

o Ground-Sensing Inputs

o Rail-to-Rail Outputs

o No Output Phase Inversion for Overdriven Inputs

o No Differential Clamp Across Inputs

o Available in Ultra-Small Packages

5-Pin SC70 (MAX9075)

8-Pin SOT23 (MAX9077)

Ordering Information

Typical Operating Circuit

OUT

GND

REF

IN-

IN+

MAX9075

MAX9077

Pin Configurations

TOP VIEW

GND

IN-IN+

15V

OUT

MAX9075

SC70-5/SOT23-5

Pin Configurations continued at end of data sheet.

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

PART* TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX9075EXK+T -40°C to +85°C 5 SC70 AAC+

MAX9075EUK+T -40°C to +85°C 5 SOT23 ADLX+

MAX9077EKA+T -40°C to +85°C 8 SOT23 AAAD+

MAX9077EUA+ -40°C to +85°C 8 µMAX —

MAX9077ESA+ -40°C to +85°C 8 SO —

MAX9077MSA/PR2 -55°C to +125°C 8 SO —

Denotes a lead(Pb)-free/RoHS-compliant package.

*Denotes a package containing lead(Pb).

T = Tape and reel.

Summary of content (9 pages)

PAGE 1
MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators General Description Features The MAX9075/MAX9077 single/dual comparators are optimized for 3V and 5V single-supply applications. These comparators have a 580ns propagation delay and consume just 3µA per comparator. The combination of low-power, single-supply operation down to 2.1V, and ultra-small footprint makes these devices ideal for all portable applications.
PAGE 2
MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators ABSOLUTE MAXIMUM RATINGS Supply Voltage VCC to GND........................................................................6V All Other Pins to GND...........................-0.3V to (VCC + 0.3V) Current into Input Pins ......................................................±20mA Duration of Output Short-Circuit to GND or VCC ........Continuous Continuous Power Dissipation (TA = +70°C) 5-Pin SC70 (derate 3.1mW/°C above +70°C) ............
PAGE 3
MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Typical Operating Characteristics (VCC = 5V, VCM = 0V, 100mV overdrive, TA = +25°C, unless otherwise noted.) OUTPUT-VOLTAGE LOW vs. SINK CURRENT (VCC = 2.1V) TA = +85°C 1.5 TA = +85°C 10 15 5 10 15 20 25 30 35 SINK CURRENT (mA) SINK CURRENT (mA) OUTPUT-VOLTAGE HIGH vs. SOURCE CURRENT (VCC = 2.1V) OUTPUT-VOLTAGE HIGH vs. SOURCE CURRENT (VCC = 3V) 3.0 1.5 TA = +85°C 1.0 TA = +25°C 0.5 TA = -40°C 2.
PAGE 4
MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Typical Operating Characteristics (continued) (VCC = 5V, VCM = 0V, 100mV overdrive, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. OUTPUT TRANSITION FREQUENCY SUPPLY CURRENT (μA) VCC = 5V 2.5 VCC = 3V 2.0 VCC = 2.1V 1.5 100 -0.1 OFFSET VOLTAGE (mV) 3.0 0 MAX9075 toc11 3.5 SUPPLY CURRENT (μA) 1000 MAX9075 toc10 4.0 INPUT OFFSET VOLTAGE vs. TEMPERATURE VCC = 5V VCC = 3V 10 1.0 MAX9075 toc12 SUPPLY CURRENT vs.
PAGE 5
MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Typical Operating Characteristics (continued) (VCC = 5V, VCM = 0V, 100mV overdrive, TA = +25°C, unless otherwise noted.
PAGE 6
MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Pin Description PIN MAX9075 NAME MAX9077 FUNCTION SOT23 SC70 µMAX/SO SOT23 1 1 — — OUT — — 1 1 OUTA Output of Comparator A 2 2 4 2 GND Ground 3 3 — — IN+ Noninverting Comparator Input — — 3 4 INA+ 4 4 — — IN- — — 2 3 INA- Inverting Input of Comparator A 5 5 8 8 VCC Positive Supply Voltage — — 5 5 INB+ Noninverting Input of Comparator B — — 6 6 INB- Inverting Input of Comparato
PAGE 7
MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators 4) Choose the threshold voltage for VIN rising (VTHR). In this example, choose VTHR = 3V. VCC 5) Calculate R2 as follows: R3 R2 = 1/{[VTHR/(VREF R1)] - 1/R1 - 1/R3} = 1/{[3 / (1.2 100kΩ)] - 1/100kΩ - 1/10MΩ} = 67.114kΩ R1 VIN VCC A 1% preferred value is 64.9kΩ.
PAGE 8
MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA 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. 8 PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
PAGE 9
MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Revision History REVISION NUMBER REVISION DATE 0 0/99 Initial release — 3 1/07 Revised Absolute Maximum Ratings 2 12/12 Added MAX9077MSA/PR2 to Ordering Information and updated for lead-free notation. Revised Absolute Maximum Ratings, Electrical Characteristics, and the Noise Considerations, Comparator Input section.