Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Op-amp Multi-purpose SOIC 8 N

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

- 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

GND

IN-IN+

16V

OUT

MAX4289

SOT23-6

TOP VIEW

OUT

N.C.GND

N.C.

IN-

IN+

N.C.

SO-8

MAX4289

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 —

POWER-SUPPLY REJECTION RATIO

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

PSRR (dB)

0.8 1.1 1.20.9 1.0 1.3 1.4 1.5

= +85°C

= +25°C

= -40°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.

Summary of content (9 pages)

PAGE 1
9-2023; Rev 0; 1/02 1.0V Micropower, SOT23, Operational Amplifier Applications Single-Cell Systems Strain Gauges Portable Electronic Equipment Cellular Phones Battery-Powered Instrumentation Sensor Amplifiers Features ♦ Ultra-Low Voltage Operation: Guaranteed Specifications from 1.0V to 5.5V ♦ Input Common-Mode Range: 0 to (VCC - 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.
PAGE 2
MAX4289 1.0V Micropower, SOT23, Operational Amplifier ABSOLUTE MAXIMUM RATINGS Power-Supply Voltage (VCC to GND).......................................6V Input Voltage (IN+ or IN-) ...........................(VCC + 0.3V) to -0.3V Input Current (IN+ or IN-)....................................................20mA Output Short-Circuit Duration to VCC or GND ............Continuous Continuous Power Dissipation (TA = +70°C) 6-Pin SOT23 (derate 8.7mW/°C above +70°C).............696mW 8-Pin SO (derate 5.
PAGE 3
1.0V Micropower, SOT23, Operational Amplifier (VCC = 3V, VCM = 0, VOUT = VCC/2, RL tied to VCC/2, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL Output Short-Circuit Current Sourcing/sinking current IOUT Power-Up Time Input Capacitance CONDITIONS MIN TYP VCC = 1.0V 0.6 VCC = 3.0V 19 tPU 300 MAX UNITS mA µs CIN 3.
PAGE 4
Typical Operating Characteristics (continued) (VCC = 3V, VCM = 0, RL to VCC/2, TA = +25°C, unless otherwise noted.) 8 7 6 RL CONNECTED TO GND 18 16 20 RL = 5kΩ 14 VOH (mV) INPUT BIAS CURRENT (nA) 9 20 MAX4289 toc05 30 MAX4289 toc04 10 10 12 10 8 6 0 4 5 RL = 100kΩ 2 4 0 20 40 60 80 100 0.5 1.0 1.5 2.0 2.5 -40 3.0 -20 0 20 40 60 80 100 250 300 TEMPERATURE (°C) INPUT COMMON-MODE VOLTAGE (V) TEMPERATURE (°C) OUTPUT SWING LOW vs. TEMPERATURE OPEN-LOOP GAIN vs.
PAGE 5
1.0V Micropower, SOT23, Operational Amplifier MINIMUM-OPERATING VOLTAGE vs. TEMPERATURE LARGE-SIGNAL TRANSIENT RESPONSE MAX4289 toc13 MAX4289 toc14 1.2 MAX4289 toc15 SMALL-SIGNAL TRANSIENT RESPONSE PSRR > 70dB IN 1V/div 1.1 VCC (V) IN 50mV/div OUT 50mV/div OUT 1V/div 1.0 0.9 0.8 10µs/div -40 200µs/div -20 0 20 40 60 80 100 TEMPERATURE (°C) VCC = 1V SINKING CURRENT 0.9 0.6 15 10 5 0.3 0 0 0.2 0.4 0.6 0.8 0 1.0 0.5 1.0 1.5 2.0 2.
PAGE 6
1.0V Micropower, SOT23, Operational Amplifier MAX4289 Pin Description PIN NAME FUNCTION SO SOT23 1, 5, 8 5 2 4 IN- Inverting Input 3 3 IN+ Noninverting Input 4 2 GND Ground 6 1 OUT Amplifier Output 7 6 VCC Positive Supply. Bypass with a 0.1µF capacitor to GND. N.C. No Connection. Not internally connected.
PAGE 7
1.0V Micropower, SOT23, Operational Amplifier MAX4289 POWER-SUPPLY REJECTION RATIO vs. SUPPLY VOLTAGE 90 TA = +85°C 80 PSRR (dB) RISO MAX4289 TA = -40°C 70 RL CL TA = +25°C 60 50 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 SUPPLY VOLTAGE (V) Figure 3. PSRR vs. VCC Over the Temperature Range Power-Up Settling Time The MAX4289 typically requires 300µs to power-up after VCC is stable. During this startup time, the output is indeterminate. The application circuit should allow for this initial delay.
PAGE 8
MAX4289 1.0V Micropower, SOT23, Operational Amplifier INPUT VOH HYSTERESIS VHI VLO VOH OUTPUT VOL VIN RHYST R1 VCC VOUT MAX4289 R2 VEE VEE Figure 5.
PAGE 9
1.0V Micropower, SOT23, Operational Amplifier 6LSOT.EPS SOICN.EPS Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.