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MAX4291, MAX4292, MAX4294
Ultra-Small, +1.8V, µPower, Rail-to-Rail I/O Op Amps
1.8V Op Amps Deliver 120dB Avol and Drive 2-kilohm loads with 0.017% THD+N
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Status
Active: In Production.
Description
The MAX4291/MAX4292/MAX4294 family of micropower operational amplifiers operates from a 1.8V to 5.5V single supply or ±0.9V to ±2.75V dual supplies and has Rail-to-Rail input/output capabilities. These amplifiers provide a 500kHz gain-bandwidth product and 120dB open-loop voltage gain while using only 100µA of supply current per amplifier. The combination of low input offset voltage (±200µV) and high open-loop gain makes them ideal for low-power/low-voltage, high-precision portable applications.
The MAX4291/MAX4292/MAX4294 have an input common-mode range that extends to each supply rail, and their outputs swing to within 46mV of the rails with a 2kΩ load. Although the minimum operating voltage is specified at 1.8V, these devices typically operate down to 1.5V. The combination of ultra-low-voltage operation, rail-to-rail inputs/output, and low-power consumption makes these devices ideal for any portable/two-cell battery-powered system.
The single MAX4291 is offered in an ultra-small 5-pin SC70 package. The dual MAX4292 is offered in a space-saving 8-bump, 1.5mm x 1.5mm footprint, ultra chip-scale package (UCSP™).
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Data Sheet
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Key Features
- Ultra-Low Voltage Operation—Guaranteed Down to 1.8V
- 100µA Supply Current per Amplifier
- 500kHz Gain-Bandwidth Product
- 120dB Open-Loop Voltage Gain (RL = 100kΩ)
- 0.017% Total Harmonic Distortion Plus Noise (THD + N) at 1kHz
- Rail-to-Rail Input Common-Mode Range
- Rail-to-Rail Output Drives 2kΩ Load
- No Phase Reversal for Overdriven Inputs
- Unity-Gain Stable for Capacitive Loads up to 100pF
- 200µV Input Offset Voltage (MAX4292/MAX4294)
- Single in Small 5-Pin SC70
- Available in Ultra-Small Packages:
- 5-Pin SC70 (MAX4291)
- 8-Bump UCSP (MAX4292)
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Applications/Uses
- 2-Cell Battery-Operated Systems
- Automotive Sensors
- Base Station/Wireless Infrastructure
- Battery-Powered Applications
- Cell Phones
- Computers: Desktops, Workstations, and Servers
- Computers: Motherboards
- Computers: Notebook
- Digital Scales/Strain Gauges
- GPS Solutions
- MP3 Docking Stations: Mid Level
- Portable Electronic Equipment
- Programmable Logic Controllers (PLCs)
- Sensor Amplifiers
- Set-Top Boxes
- Strain Gauges
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Key Specifications:
| Operational Amplifiers |
| Part Number |
Amps. |
Rail to Rail |
AVCL |
VSUPPLY (Total)
(V) |
VSUPPLY (Total)
(V) |
ICC per Amp.
(µA) |
ICC per Amp.
(µA) |
VOS
(µV) |
CMRR @DC
(dB) |
PSRR @DC
(dB) |
Input IBIAS
(nA) |
Unity Gain BW
(MHz) |
Slew Rate
(V/µs) |
en
(nV/√Hz) |
in
(pA/√Hz) |
Low Pwr. Shutdn |
Package/Pins |
Budgetary Price |
| min |
min |
max |
typ |
max |
max |
typ |
typ |
max |
typ |
typ |
See Notes |
| MAX4291 |
1 |
Input/Output |
1 |
1.8 |
5.5 |
100 |
225 |
2500 |
90 |
100 |
55 |
0.5 |
0.2 |
70 |
0.05 |
No |
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$0.65 @1k |
| MAX4292 |
2 |
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$0.80 @1k |
| MAX4294 |
4 |
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$1.12 @1k |
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See All Operational Amplifiers (160)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Pin Configurations
Notes and Comments
SC70, +1.8V, Rail-to-Rail I/O op amps, 0.017% THD+N, 120dB open-loop gain
More Information
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Information Index
Document Ref.: 19-1612
Rev 3;
2002-05-29
This page last modified: 2009-07-15
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