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MAX4239 Dataheets PDF



Part Number MAX4239
Manufacturers Maxim
Logo Maxim
Description Ultra-Low Offset/Drift / Low-Noise / Precision SOT23 Amplifiers
Datasheet MAX4239 DatasheetMAX4239 Datasheet (PDF)

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 s.

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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 ●● Thermocouples ●● Strain Gauges ●● Electronic Scales ●● Medical Instrumentation ●● Instrumentation Amplifiers Typical Application Circuit 5V 360Ω STRAIN GAUGE 18kΩ AV = 100 ADC AIN 18kΩ MAX4238/ MAX4239 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 • 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 Pin Configurations appear at end of data sheet. Ordering Information PART PIN-PACKAGE TOP MARK MAX4238AUT-T 6 SOT23 AAZZ MAX4238AUT/V+T 6 SOT23 — MAX4238ASA 8 SO — MAX4238ATT+T 6 TDFN-EP* +ANG MAX4239AUT-T 6 SOT23 ABAA MAX4239AUT/V+T 6 SOT23 — MAX4239ASA 8 SO — MAX4239ATT+T 6 TDFN-EP* +ANH Note: All devices are specified over the -40°C to +125°C operating temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed paddle. /V denotes an automotive-qualified part. Selector Guide PART MINIMUM STABLE GAIN GAIN BANDWIDTH (MHz) MAX4238 MAX4239 1V/V 10V/V 1 6.5 19-2424; Rev 6; 9/15 MAX4238/MAX4239 Ultra-Low Offset/Drift, Low-Noise, Precision SOT23 Amplifiers Absolute Maximum Ratings Power-Supply Voltage (VCC to GND)......................................6V All Other Pins.............................(VGND - 0.3V) to (VCC + 0.3V) Output Short-Circuit Duration (OUT shorted to VCC or GND)..............................Continuous Continuous Power Dissipation (TA = +70°C) 6-Pin Plastic SOT23 (derate 9.1mW/°C above +70°C).................................727mW 8-Pin Plastic SO (derate 5.88mW/°C above +70°C)....471mW 6-Pin TDFN-EP (derate 18.2mW above +70°C)........1454mW Operating Temperature Range.......................... -40°C to +125°C Junction Temperature......................................


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