19-2023; Rev 0; 1/02
1.0V Micropower, SOT23, Operational Amplifier
General Description
The MAX4289 micropower, operational amplifier is opti-
mized for ultra-low supply voltage operation. The ampli-
fier consumes only 9碌A(chǔ) 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
swing that is virtually Rail-to-Rail
廬
, allowing almost all of
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擄C to +85擄C.
Features
o
Ultra-Low Voltage Operation: Guaranteed
Specifications from 1.0V to 5.5V
o
Input Common-Mode Range: 0 to (V
CC
- 0.2V)
o
Ultra-Low Power Consumption: 9碌A(chǔ) 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 5k鈩?Load
o
No Output Phase Reversal for Overdriven Inputs
o
Available in a Tiny 6-Pin SOT23 (3mm
鉁?/div>
3mm)
MAX4289
Applications
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
Ordering Information
PART
MAX4289EUT-T
MAX4289ESA
TEMP RANGE
-40擄C to +85擄C
-40擄C to +85擄C
PIN-
PACKAGE
6 SOT23-6
8 SO
TOP
MARK
AARX
鈥?/div>
Typical Operating Characteristic
POWER-SUPPLY REJECTION RATIO
vs. SUPPLY VOLTAGE
90
T
A
= +85擄C
80
PSRR (dB)
Pin Configurations
TOP VIEW
OUT
1
6
V
CC
N.C. 1
IN- 2
8
7
N.C.
V
CC
OUT
N.C.
GND 2
70
T
A
= -40擄C
MAX4289
5
N.C.
MAX4289
IN+
3
6
5
GND 4
IN+ 3
60
T
A
= +25擄C
4
IN-
SOT23-6
50
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
SUPPLY VOLTAGE (V)
SO-8
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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