MAX4238/MAX4239 Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers General Description The MAX4238/MAX4239 are low-noise, low-drift, ultrahigh precision amplifiers that offer near-zero DC offset
and drift through the use of patented 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 activelow 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. Applications
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●● Thermocouples
Strain Gauges
Electronic Scales
Medical Instrumentation
Instrumentation Amplifiers Benefits and 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°C to +125°C …
