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
swing that is virtually Rail-to-Rail
®
, 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°C to +85°C.
Applications
Features
♦ Ultra-Low Voltage Operation: Guaranteed
Specifications from 1.0V to 5.5V
♦ Input Common-Mode Range: 0 to (V
CC
- 0.2V)
♦ Ultra-Low Power Consumption: 9µA Supply
Current (typ)
♦ Optimized for Operation from Single-Cell
Battery-Powered Systems
♦ Compatible with 3.0V and 5.0V Single-Supply
Systems
♦ Low Offset Voltage: 0.2mV
♦ Low Input Bias Current: 5nA
♦ High Open-Loop Voltage Gain: 90dB
♦ Rail-to-Rail Output Stage Drives 5kΩ Load
♦ No Output Phase Reversal for Overdriven Inputs
♦ Available in a Tiny 6-Pin SOT23 (3mm
✕
3mm)
MAX4289
1.0V Micropower, SOT23, Operational Amplifier
________________________________________________________________ Maxim Integrated Products 1
N.C.GND
N.C.
N.C.
N.C.
vs. SUPPLY VOLTAGE