MAX4209

Ultra-Low Offset/Drift, Precision Instrumentation Amplifiers with REF Buffer

Instrumentation Amplifiers Use Autozero to Achieve 20µV (max) Offset

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Overview

Features and Benefits
Product Details

Features and Benefits

Spread-Spectrum, Auto-Zero Instrumentation Amplifiers Improve DC Characteristics to Maximize Sensor Performance
- Input Offset Voltage: ±20µV (max) at +25°C
- ±0.25% (max) Gain Error
- Low 0.2µV/°C Offset Voltage Drift
- 1pA CMOS Input Bias Current
- True Ground Sensing with Rail-to-Rail Output
- 750kHz Gain-Bandwidth Product
Buffered REF Input for High Accuracy and Bipolar Operation
Low Power Operation Supports Remote Sensing and Battery-Powered Applications
- 2.85V to 5.5V Single-Supply Operation (or ±1.425V to ±2.75V Dual Supplies)
- 750µA Supply Current
- 1.4µA Shutdown Mode
Adjustable (MAX4208) and Fixed Gain of 100 (MAX4209) Provide Design Flexibility

Product Details

The MAX4208/MAX4209 ultra-low offset and drift instrumentation amplifiers feature exceptional precision specifications, low power consumption, rail-to-rail output, excellent gain-bandwidth product, and buffered REFIN/MODE input in a very small µMAX® package. These devices use a spread-spectrum, autozeroing technique that constantly measures and corrects the input offset, eliminating drift over time and temperature and the effect of 1/f noise. This technique achieves less than 20µV offset voltage, allows ground-sensing capability, provides ultra-low CMOS input bias current and increased common-mode rejection performance.

The MAX4208/MAX4209 provide high-impedance inputs optimized for small-signal differential voltages (±100mV). All devices provide a gain-bandwidth product of 750kHz.

The MAX4208 provides an adjustable gain with two external resistors or unity gain with FB connected to OUT. The MAX4209 is available with a fixed gain of 100V/V with ±0.03% (typ) accuracy. Both devices include a reference input (REF) to level-shift the output, allowing for bipolar signals in single-supply applications. In both devices, REFIN/MODE is an input to a precision unity-gain buffer, which sets the REF voltage to level-shift the output. The internal REF buffer allows the reference to be set by a simple resistive divider or an ADC reference without any loading error.

The MAX4208/MAX4209 operate with a 2.85V to 5.5V single-supply voltage and consume only 750µA of quiescent current (when the internal buffer is off) and only 1.4µA in shutdown mode. These amplifiers also operate with ±2.5V dual supplies with REF connected to ground and REFIN/MODE to V_SS. The MAX4208/MAX4209 are available in space-saving 8-pin µMAX packages and are specified over the automotive operating temperature range (-40°C to +125°C).

Applications

Battery-Powered Medical Equipment
Differential Voltage Amplification
Industrial Process Control
Notebook Computers
Precision Low-Side Current Sense
Strain-Gauge Amplifiers

Product Categories

Amplifiers
- Instrumentation Amplifiers

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Product Lifecycle Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

MAX4209EVKIT

Evaluation Kit for the MAX4209

MAX4208EVKIT

Evaluation Kit for the MAX4208

MAX4209EVKIT

View Detailed Evaluation Kit Information

The MAX4209 evaluation kit (EV kit) simplifies evaluation of the MAX4208 ultra-low offset/drift, fixed gain, precision instrumentation amplifier in a µMAX® package. The MAX4209 features high-impedance differential inputs optimized for small voltages (±100mV max) and provides rail-to-rail output. The MAX4209 EV kit circuit uses the 100V/V fixed-voltage-gain version of the MAX4209. The EV kit operates from a single-supply voltage between 2.85V and 5.5V, or dual supplies providing ±1.425V to ±2.75V.

The MAX4209 EV kit can also evaluate the 10V/V and 1000V/V fixed-gain versions of the MAX4209 amplifiers, as well as the MAX4208 adjustable-gain amplifier. The MAX4209 IC temperature range is -40°C to +125°C.

The MAX4208 EV kit, available separately, evaluates the MAX4208 adjustable-gain amplifier with external gain-setting resistors.

Note: To evaluate a MAX4208 IC featuring externally adjustable gain, order a MAX4208EVKIT+ or request a free sample of the MAX4208AUA+ IC along with the MAX4209EVKIT+. For the alternate-gain versions of the MAX4209 IC, see the Part Selection Table in the full data sheet for IC ordering information.

Applications

Automotive Transducer Applications
Battery-Powered Medical Equipment
Differential Voltage Amplification
Industrial Process Control
Notebook Computers
Precision Low-Side Current Sense
Strain-Gauge Amplifiers

Features & Benefits

2.85V to 5.5V Single-Supply Operation
±1.425V to ±2.75V Dual-Supply Operation

100V/V Fixed Voltage Gain
Rail-to-Rail Output
Configurable Reference Voltage: Externally or Internally Buffered
Optional Current-Sense Mode
Fully Assembled and Tested

MAX4208EVKIT

View Detailed Evaluation Kit Information

The MAX4208 evaluation kit (EV kit) simplifies evaluation of the MAX4208 ultra-low offset/drift, adjustable gain, precision instrumentation amplifier in a µMAX® package. The MAX4208 features high-impedance differential inputs optimized for small voltages (±100mV max) and provides rail-to-rail output. The MAX4208 EV kit is configured for a gain of 148V/V. The EV kit operates from a single-supply voltage between 2.85V and 5.5V, or dual supplies providing ±1.425V to ±2.75V.

The MAX4208 EV kit can also be used to evaluate the MAX4209 fixed-gain amplifiers. The MAX4208 IC temperature range is -40°C to +125°C.

The MAX4209 EV kit, available separately, evaluates the 100V/V fixed-gain MAX4209 amplifier without external gain-setting resistors.

Note: To evaluate a MAX4209 IC featuring internal gain-setting resistors, order a MAX4209EVKIT+ or request a free sample of the MAX4209 IC along with the MAX4208EVKIT+. See the Part Selection Table in the full data sheet for IC ordering information.

Applications

Automotive Transducer Applications
Battery-Powered Medical Equipment
Differential Voltage Amplification
Industrial Process Control
Notebook Computers
Precision Low-Side Current Sense
Strain-Gauge Amplifiers

Features & Benefits

Single- or Dual-Supply Operation
- 2.85V to 5.5V Single-Supply Operation
- ±1.425V to ±2.75V Dual-Supply Operation
Adjustable Voltage Gain Configured to 148V/V
Rail-to-Rail Output
Configurable Reference Voltage: Externally or Internally Buffered
Optional Current-Sense Mode
Fully Assembled and Tested

Documentation & Resources

Data Sheet

MAX4208-MAX4209: Ultra-Low Offset/Drift, Precision Instrumentation Amplifiers with REF Buffer Data Sheet (Rev. 3)
5/15/2015
PDF

Reliability Data

MAX4209 Reliability Data
1/12/2023
PDF

Technical Article

Tools & Simulations

SPICE Model

LIB

2.41K

MAX4209 SPICE Macro Model

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
MAX4209HAUA+	Material Declaration	Reliability Data	Micro-MAX, Thin Shrink Small-Outline	Ultra Librarian SamacSys
MAX4209HAUA+T	Material Declaration	Reliability Data	Micro-MAX, Thin Shrink Small-Outline	Ultra Librarian SamacSys
Wafer Fabrication Data		MAX4209 Reliability Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.