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MAX4236, MAX4237
SOT23, Very High Precision, 3V/5V Rail-to-Rail Op Amps
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Status
Active: In Production.
Description
The MAX4236/MAX4237 are high-precision op amps that feature an exceptionally low offset voltage and offset voltage temperature coefficient without using any
chopper techniques. The MAX4236 and MAX4237 have a typical large-signal, open-loop voltage gain of 120dB. These devices have an ultra-low input-bias current of 1pA. The MAX4236 is unity-gain stable with a gain-bandwidth product of 1.7MHz, while the MAX4237 is stable for closed-loop gains greater than 5V/V with a gain-bandwidth product of 7.5MHz. Both devices have a shutdown function in which the quiescent current is reduced to less than 0.1µA, and the amplifier output is forced into a high-impedance state.
The input common-mode range of the MAX4236/MAX4237 extends below the negative supply range, and the output swings rail-to-rail . These features make the amplifiers ideal for applications with +3V or +5V single power supplies. The MAX4236/MAX4237 are specified for the extended temperature range (-40°C to +85°C) and are available in tiny SOT23, µMAX®, and SO packages. For greater accuracy, the A grade µMAX and SO packages are tested to guarantee 20µV (max) offset voltage at +25°C and less then 2µV/°C drift.
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Data Sheet
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Key Features
- Ultra-Low Offset Voltage
- 20µV (max) at +25°C (Grade A)
- 50µV (max) at +25°C (Grade B, 6-Pin SOT23)
- Ultra-Low Offset Voltage Drift
- 2µV/°C (max) (Grade A)
- 4.5µV/°C (max) (Grade B, 6-Pin SOT23)
- 5.5µV/°C (max) (6-Pin SOT23)
- Ultra-Low 1pA Input Bias Current
- High Open-Loop Voltage Gain: 110dB (min) (RL = 100kΩ)
- Compatible with +3V and +5V Single-Supply Power Systems
- Ground Sensing: Input Common-Mode Range Includes Negative Rail
- Rail-to-Rail Output Swing into a 1kΩ Load
- 350µA Quiescent Current
- Gain-Bandwidth Product
- 1.7MHz (MAX4236, AV = 1V/V)
- 7.5MHz (MAX4237, AV = 5V/V)
- 200pF Capacitive Load Handling Capability
- Shutdown Mode: 0.1µA Quiescent Current, Places Output in a High-Impedance State
- Available in Space-Saving SOT23 and µMAX Packages
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Applications/Uses
- Automatic Test Equipment (ATE)
- Battery-Powered Applications
- Cardiac Monitor
- Displays: Industrial, Front Panel, and Instrumentation
- Electrochemical Sensors
- Industrial: Process Measurement and Control
- Instrumentation Amplifiers
- Panel Meters
- Piezoelectric Sensors
- Power Meters
- Programmable Logic Controllers (PLCs)
- Strain Gauges
- Thermocouple Amplifiers
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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) |
Low Pwr. Shutdn |
Package/Pins |
Budgetary Price |
| min |
min |
max |
typ |
max |
max |
typ |
typ |
max |
typ |
typ |
See Notes |
| MAX4237 |
1 |
Output Only |
5 |
2.4 |
5.5 |
350 |
440 |
50 |
103 |
120 |
0.5 |
7.5 |
1.3 |
14 |
Yes |
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$0.71 @1k |
| MAX4237A |
5 |
20 |
7.5 |
1.3 |
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$1.05 @1k |
| MAX4236 |
1 |
50 |
1.7 |
0.3 |
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$0.72 @1k |
| MAX4236A |
1 |
20 |
1.7 |
0.3 |
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$1.05 @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
Typical Application Circuit
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-2110
Rev 0;
2001-08-01
This page last modified: 2009-07-15
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