General Description

The MAX4289 micropower, operational amplifier is opti-

mized for ultra-low supply voltage operation. The ampli-

fier consumes only 9µA of quiescent supply current and

is fully specified for operation from a single 1.0V to 5.5V

power supply. This ultra-low voltage operation together

with the low quiescent current consumption make the

MAX4289 ideal for use in battery-powered systems

operated from as little as a single alkaline cell. The

MAX4289 also features a wide input common-mode

range that includes the ground, and an output voltage

the power supply to be used for signal voltage.

The low input offset voltage and low input bias current

specifications along with the high open-loop gain make

the MAX4289 well-suited to applications requiring a

high degree of precision.

The MAX4289 is available in a tiny 6-pin SOT23 pack-

age. All specifications are guaranteed over the extend-

ed temperature range of -40°C to +85°C.

Applications

Features

o Ultra-Low Voltage Operation: Guaranteed

Specifications from 1.0V to 5.5V

o Ultra-Low Power Consumption: 9µA Supply

Current (typ)

o Optimized for Operation from Single-Cell

Battery-Powered Systems

o Compatible with 3.0V and 5.0V Single-Supply

Systems

o Low Offset Voltage: 0.2mV

o Low Input Bias Current: 5nA

o High Open-Loop Voltage Gain: 90dB

o Rail-to-Rail Output Stage Drives 5kΩ Load

o No Output Phase Reversal for Overdriven Inputs

1.0V Micropower, SOT23, Operational Amplifier

________________________________________________________________ Maxim Integrated Products

1

GND

IN-

IN+

16

OUT

MAX4289

SOT23-6

TOP VIEW

2

34

OUT

N.C.

GND

1

2

8

7

N.C.

IN-

IN+

N.C.

SO-8

3

4

6

5

MAX4289

5

N.C.

Pin Configurations

Typical Operating Characteristic

Ordering Information

19-2023; Rev 0; 1/02

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.

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX4289EUT-T

-40°C to +85°C

6 SOT23-6

AARX

MAX4289ESA

-40°C to +85°C

8 SO

—

50

60

70

80

90

POWER-SUPPLY REJECTION RATIO

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

0.8

1.1

1.2

0.9

1.0

1.3

1.4

1.5

°C

°C

°C

Single-Cell Systems

Portable Electronic

Equipment

Battery-Powered

Instrumentation

Hearing Aids Using Zinc

Air Battery

Strain Gauges

Cellular Phones

Notebook Computers

Sensor Amplifiers

Portable Communication

Devices

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.