MAXIM MAX9025, MAX9028 User Manual

19-3241; Rev 1; 6/11

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

UCSP, 1.8V, Nanopower, Beyond-the-Rails

Comparators With/Without Reference

General Description

The MAX9025–MAX9028 nanopower comparators in space-saving chip-scale (UCSP™) packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1.8V. The MAX9025/MAX9026 feature an on-board 1.236V ±1% reference and draw an ultra-low supply current of only 1µA, while the MAX9027/ MAX9028 (without reference) require just 0.6µA of supply current. These features make the MAX9025–MAX9028 family of comparators ideal for all 2-cell batterymonitoring/management applications.

The unique design of the output stage limits supplycurrent surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX9025/MAX9027 have a push-pull output stage that sinks and sources current. Large internal-output drivers allow rail-to-rail output swing with loads up to 5mA. The MAX9026/MAX9028 have an open-drain output stage that makes them suitable for mixed-voltage system design. All devices are available in the miniature 6-bump UCSP packages.

Refer to the MAX9117 data sheet for similar comparators in 5-pin SC70 packages and the MAX9017 data sheet for similar dual comparators in 8-pin SOT23 packages.

Applications

2-Cell Battery Monitoring/Management Ultra-Low-Power Systems

Mobile Communications

Notebooks and PDAs

Sensing at Ground or Supply Line

Telemetry and Remote Systems

Medical Instruments

Selector Guide

PART

MAX9025 Yes Push-Pull 1.0

MAX9026 Yes Open-Drain 1.0

MAX9027 No Push-Pull 0.6

MAX9028 No Open-Drain 0.6

Typical Application Circuit appears at end of data sheet.

INTERNAL

REFERENCE

OUTPUT

TYPE

SUPPLY

CURRENT

)

(µA

Features

♦ Space-Saving UCSP Package (1mm x 1.52mm)

♦ Ultra-Low Supply Current

0.6µA (MAX9027/MAX9028) 1µA with Reference (MAX9025/MAX9026)

♦ Guaranteed to Operate Down to +1.8V

♦ Internal 1.236V ±1% Reference (MAX9025/MAX9026)

♦ Input Voltage Range Extends 200mV

Beyond-the-Rails

♦ CMOS Push-Pull Output with ±5mA Drive

Capability (MAX9025/MAX9027)

♦ Open-Drain Output Versions Available

(MAX9026/MAX9028)

♦ Crowbar-Current-Free Switching

♦ Internal Hysteresis for Clean Switching

♦ No Phase Reversal for Overdriven Inputs

Ordering Information

PART

MAX9025EBT+T -

MAX9026EBT+T -40°C to +85°C 6 UCSP ADC

MAX9027EBT+T -40°C to +85°C 6 UCSP ADD

MAX9028EBT+T -40°C to +85°C 6 UCSP ADE

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

T = Tape and reel.

TEMP

RANGE

40°C to +85°C 6 UCSP ADB

BUMPPACKAGE

TOP

MARK

Pin Configurations

TOP VIEW (BUMPS ON BOTTOM)

IN+

MAX9025–

MAX9028

REF

)

IN-

OUT

MAX9025–MAX9028

Beyond-the-Rails and UCSP are trademarks of Maxim Integrated Products, Inc.

________________________________________________________________ Maxim Integrated Products 1

( ) MAX9027/MAX9028 PINS

UCSP

MAX9025–MAX9028

UCSP, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—MAX9025/MAX9026 (WITH REF)

(VCC= +5V, VEE= 0V, V

IN+

= V

REF

, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

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.

Supply Voltage (VCCto VEE)..................................................+6V

Voltage Inputs (IN+, IN-, REF) .........(VEE- 0.3V) to (VCC+ 0.3V)

Output Voltage

MAX9025/MAX9027....................(VEE- 0.3V) to (VCC+ 0.3V)

MAX9026/MAX9028..................................(VEE- 0.3V) to +6V

Current into Input Pins ........................................................20mA

Output Current..................................................................±50mA

Output Short-Circuit Duration .................................................10s

Continuous Power Dissipation (TA= +70°C)

6-Bump UCSP (derate 3.9mW/°C above +70°C)........308mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

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

Bump Temperature (soldering) Reflow............................+235°C

PARAMETER

CONDITIONS

Supply Voltage Range V

Inferred from the PSRR test 1.8 5.5 V VCC = 1.8V 0.8 1.5

TA = +25°C 1.0 1.7Supply Current I

VCC = 5V

2.2

µA

IN+ Voltage Range V

IN+

Inferred from output swing test

0.2

TA = +25°C 0.3 5

Input Offset Voltage V

(Note 2)

Input-Referred Hysteresis V

(Note 3) 4 mV TA = +25°C

Input Bias Current I

TA = T

MIN

to T

MAX

Power-Supply Rejection Ratio PSRR VCC = 1.8V to 5.5V 0.1 1

TA = +25°C

350

M AX 9025, V

C C

= 5V ,

S OU R C E

= 6m A

450

TA = +25°C 56 200

Output Voltage Swing High

M AX 9025, V

C C

300

TA = +25°C

350

C C

= 5V ,

S I N K

= 6m A

450

TA = +25°C 57 200

Output Voltage Swing Low V

C C

= 1.8V ,

S IN K

= 1m A

300

Output Leakage Current I

LEAK

MAX9026 only, VO = 5.5V

1µA

VCC = 5V 35

Sourcing, VO = V

VCC = 1.8V 3 VCC = 5V 33

Output Short-Circuit Current I

Sinking, VO = V

VCC = 1.8V 3

VCC = 1.8V 7

High-to-Low Propagation Delay (Note 4)

PD-

= 5V 6

µs

SYMBOL

MIN TYP MAX UNITS

TA = T

MIN

to T

MAX

TA = T

MIN

to T

MAX

= T

MIN

to T

MAX

TA = T

= 1m A

S OU RC E

TA = T

1.8V , I

0.15

250

0.001

mV/V

MAX9025–MAX9028

UCSP, 1.8V, Nanopower, Beyond-the-Rails

Comparators With/Without Reference

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—MAX9027/MAX9028 (WITHOUT REF)

(VCC= +5V, VEE= 0V, VCM= 0V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

ELECTRICAL CHARACTERISTICS—MAX9025/MAX9026 (WITH REF) (continued)

(VCC= +5V, VEE= 0V, V

IN+

= V

REF

, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VCC = 1.8V 11

MAX9025 only

= 5V 28

VCC = 1.8V 12

Low-to-High Propagation Delay (Note 4)

PD+

MAX9026 only, R

PULLUP

= 100kΩ

= 5V 31

µs

Rise Time t

RISE

MAX9025 only, CL = 15pF 1.6 µs

Fall Time t

FALL

CL = 15pF 0.2 µs

Power-Up Time t

1.2 ms

TA = +25°C

Reference Voltage V

REF

TA = T

MIN

to T

MAX

Reference Voltage Temperature Coefficient

REF

°C

BW = 10Hz to 100kHz 29

Reference Output Voltage Noise

REF

= 1nF

BW = 10Hz to 6kHz 60

Reference Line Regulation

∆V

REF

∆V

VCC = 1.8V to 5.5V 0.5

Reference Load Regulation

∆V

REF

∆I

OUT

∆I

OUT

= 0nA to 100nA

mV/

1.224 1.236 1.248

1.205 1.267

0.03

ppm/

µV

mV/V

RMS

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage Range V

Input Common-Mode Voltage Range

Input Offset Voltage V

Input-Referred Hysteresis V

Input Bias Current I

Power-Supply Rejection Ratio PSRR VCC = 1.8V to 5.5V 0.1 1 mV/V Common-Mode Rejection Ratio CMRR (VEE - 0.2V) ≤ VCM ≤ (VCC + 0.2V) 0.5 3 mV/V

Inferred from the PSRR test 1.8 5.5 V VCC = 1.8V 0.45 0.75

VCC = 5V

Inferred from the CMRR test

-0.2V ≤ VCM ≤ + 0.2V)

(V (Note 2)

-0.2V ≤ VCM ≤ (VCC + 0.2V) (Note 3) 4 mV

TA = +25°C 0.15 1 TA = T

to T

MIN

MAX

TA = +25°C 0.6 1.0Supply Current I

= T

MIN

to T

MAX

0.2

TA = +25°C 0.3 5

= T

MIN

to T

MAX

µA

1.25

VCC +

0.2

MAX9025–MAX9028

UCSP, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—MAX9027/MAX9028 (WITHOUT REF) (continued)

(VCC= +5V, VEE= 0V, VCM= 0V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Note 1: All specifications are 100% tested at T

= +25°C. Specification limits over temperature (TA= T

MIN

to T

MAX

) are guaranteed

by design, not production tested.

Note 2: V

is defined as the center of the hysteresis band at the input.

Note 3: The hysteresis-related trip points are defined as the edges of the hysteresis band, measured with respect to the center of

the band (i.e., V

) (Figure 2).

Note 4: Specified with an input overdrive (V

OVERDRIVE

) of 100mV, and load capacitance of CL= 15pF. V

OVERDRIVE

is defined above and beyond the offset voltage and hysteresis of the comparator input. For the MAX9025/MAX9026, reference voltage error should also be added.

PARAMETER

CONDITIONS

UNITS

TA = +25°C

MAX9027 only, VCC = 5V, I

SOURCE

= 5mA

TA = +25°C58

Output Voltage Swing High

MAX9028 only, VCC =

TA = +25°C

VCC = 5V, I

SINK

= 5mA

TA = +25°C56

Output Voltage Swing Low V

VCC = 1.8V, I

SINK

= 1mA

Output Leakage Current I

LEAK

MAX9028 only, VO = 5.5V

1µA

VCC = 5V 35

Sourcing, VO = V

VCC = 1.8V 3 VCC = 5V 33

Output Short-Circuit Current I

Sourcing, VO = V

VCC = 1.8V 3

VCC = 1.8V 16

High-to-Low Propagation Delay (Note 4)

PD-

VCC = 5V 14

µs

VCC = 1.8V 15

MAX9027 only

= 5V 40

VCC = 1.8V,

Low-to-High Propagation Delay (Note 4)

PD+

MAX9028 only

= 5V,

µs

Rise Time t

RISE

MAX9027 only, CL = 15pF 1.6 µs

Fall Time t

FALL

CL = 15pF 0.2 µs

Power-Up Time t

1.2 ms

SYMBOL

VCC - V

1.8V, I

SOURCE

= 1mA

TA = T

= T

TA = T

MIN

to T

MIN TYP MAX

191 400

MAX

191 400

MAX

0.001

500 200 300

PULLUP

= 100kΩ

MAX9025/MAX9026

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX9025-28 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (nA)

4.53.52.5

800

1000

1200

600

1.5 5.5

TA = +85°C

TA = +25°C

TA = -40°C

MAX9025-28 toc02

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (nA)

4.53.52.5

400

500

600

700

800

300

1.5 5.5

MAX9027/MAX9028

SUPPLY CURRENT vs. SUPPLY VOLTAGE

TA = +85°C

TA = +25°C

= -40°C

MAX9025-28 toc03

TEMPERATURE (°C)

SUPPLY CURRENT (nA)

603510-15

800

1000

1200

600

-40 85

MAX9025/MAX9026

SUPPLY CURRENT vs. TEMPERATURE

VCC = 5V

VCC = 1.8V

VCC = 3V

MAX9025-28 toc04

TEMPERATURE (°C)

SUPPLY CURRENT (nA)

603510-15

400

500

600

700

800

300

-40 85

VCC = 5V

VCC = 3V

MAX9027/MAX9028

SUPPLY CURRENT vs. TEMPERATURE

VCC = 1.8V

OUTPUT VOLTAGE LOW

vs. SINK CURRENT

MAX9025-28 toc07

SINK CURRENT (mA)

OUTPUT VOLTAGE LOW (mV)

8642

200

400

600

800

010

VCC = 5V

VCC = 3V

VCC = 1.8V

MAX9025-28 toc05

TRANSITION FREQUENCY (kHz)

SUPPLY CURRENT (µA)

101

0.1 100

MAX9025/MAX9026

SUPPLY CURRENT vs. OUTPUT

TRANSITION FREQUENCY

VCC = 5V

VCC = 3V

VCC = 1.8V

MAX9025-28 toc06

TRANSITION FREQUENCY (kHz)

SUPPLY CURRENT (µA)

101

0.1 100

MAX9027/MAX9028

SUPPLY CURRENT vs. OUTPUT

TRANSITION FREQUENCY

VCC = 5V

VCC = 3V

VCC = 1.8V

OUTPUT VOLTAGE LOW

vs. SINK CURRENT

MAX9025-28 toc08

SINK CURRENT (mA)

OUTPUT VOLTAGE LOW (mV)

8642

200

400

600

800

010

TA = +85°C

TA = +25°C

TA = -40°C

MAX9025/MAX9027

OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT

MAX9025-28 toc09

SOURCE CURRENT (mA)

OUTPUT VOLTAGE HIGH (V

- V

, mV)

8642

200

400

600

800

010

VCC = 5V

VCC = 3V

VCC = 1.8V

MAX9025–MAX9028

UCSP, 1.8V, Nanopower, Beyond-the-Rails

Comparators With/Without Reference

_______________________________________________________________________________________ 5

Typical Operating Characteristics

(VCC= +5V, V

= 0V, CL= 15pF, V

OVERDRIVE

= 100mV, TA= +25°C, unless otherwise noted.)

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