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MAX4238：Ultra-Low Offset/Drift, Low-Noise, Precision SOT23 Amplifiers

The MAX4238/MAX4239 are low-noise, low-drift, ultra-high precision amplifiers that offer near-zero DC offset and drift through the use of autocorrelating zeroing techniques. This method constantly measures and compensates the input offset, eliminating drift over time and temperature and the effect of 1/f noise. Both devices feature rail-to-rail outputs, operate from a single 2.7V to 5.5V supply, and consume only 600µA. An active-low shutdown mode decreases supply current to 0.1µA. The MAX4238 is unity-gain stable with a gain-bandwidth product of 1MHz, while the decompensated MAX4239 is stable with AV ≥ 10V/V and a GBWP of 6.5MHz. The MAX4238/MAX4239 are available in 8-pin narrow SO, 6-pin TDFN and SOT23 packages.

Key Features DC Performance Ideal for High-Precision Sensor Interface Ultra-Low, 0.1µV Offset Voltage 2.0µV (max) at +25°C 2.5µV (max) at -40°C to +85°C 3.5µV (max) at -40° to +125°C Low 10nV/°C Drift Low Noise: 1.5µVP-P from DC to 10Hz 150dB AVOL, 140dB PSRR, 140dB CMRR High Gain-Bandwidth Product 1MHz (MAX4238) 6.5MHz (MAX4239) Ground-Sensing Input Rail-to-Rail Output (RL = 1kΩ) Low Power Consumption Reduces System Power Single 2.7V to 5.5V Supply Voltage Range 600µA Supply Current 0.1µA Shutdown Mode

MAX4238, MAX4239: Typical Operating Circuit Applications/Uses Automatic Test Equipment (ATE) Cardiac Monitor Electronic Scales Industrial: Process Measurement and Control Instrumentation Amplifiers Medical Instrumentation Programmable Logic Controllers (PLCs) Strain Gauges Thermocouples

DataSheet

Parametrics

Design kits & evaluation modules

• MAX4238EVKIT

Quality and Environmental Data

• MAX4238.pdf

Ordering Information