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//f1 / f noise. Both devices feature rail-to-rail outputs, operate from a single 2.7 V to 5.5 V supply, and consume only 600 muA600 \mu \mathrm{~A}. An activelow shutdown mode decreases supply current to 0.1 muA0.1 \mu \mathrm{~A}. MAX4238/MAX4239 是低噪声、低漂移、超高精度放大器,通过使用获得专利的自相关归零技术提供接近零的直流偏移和漂移。这种方法持续测量和补偿输入偏移,消除了随时间和温度变化的漂移以及噪声的影响 1//f1 / f 。这两款器件均具有轨到轨输出,采用 2.7 V 至 5.5 V 单电源供电,功耗仅为 600 muA600 \mu \mathrm{~A} 。低电平有效关断模式将电源电流降至 0.1 muA0.1 \mu \mathrm{~A} 。
The MAX4238 is unity-gain stable with a gain-bandwidth product of 1 MHz , while the decompensated MAX4239 is stable with A_(V) >= 10V//VA_{V} \geq 10 \mathrm{~V} / \mathrm{V} and a GBWP of 6.5 MHz . The MAX4238/MAX4239 are available in 8-pin narrow SO, 6 -pin TDFN and SOT23 packages. MAX4238 是单位增益稳定的,增益带宽积为 1 MHz,而去补偿MAX4239在 GBWP 为 6.5 MHz 时 A_(V) >= 10V//VA_{V} \geq 10 \mathrm{~V} / \mathrm{V} 是稳定的。MAX4238/MAX4239 采用 8 引脚窄体 SO、6 引脚 TDFN 和 SOT23 封装。
Applications 应用
Thermocouples 热电偶
Strain Gauges 应变片
Electronic Scales 电子秤
Medical Instrumentation 医疗仪器
Instrumentation Amplifiers 仪表放大器
Typical Application Circuit 典型应用电路
Benefits and Features 优点和特点
DC Performance Ideal for High-Precision Sensor Interface 直流性能 非常适合高精度传感器接口
-40^(@)C-40^{\circ} \mathrm{C} to +125^(@)C+125^{\circ} \mathrm{C}-40^(@)C-40^{\circ} \mathrm{C} 自 +125^(@)C+125^{\circ} \mathrm{C}
Junction Temperature 结温
+150^(@)C+150^{\circ} \mathrm{C}
Storage Temperature Range 存储温度范围
-65^(@)C-65^{\circ} \mathrm{C} to +150^(@)C+150^{\circ} \mathrm{C}-65^(@)C-65^{\circ} \mathrm{C} 自 +150^(@)C+150^{\circ} \mathrm{C}
Lead Temperature (soldering, 10s) 引线温度(焊接,10 秒)
+300^(@)C+300^{\circ} \mathrm{C}
Soldering Temperature (reflow) 焊接温度(回流焊)
Lead(Pb)-Free Packages 无铅 (Pb) 封装
+260^(@)C+260^{\circ} \mathrm{C}
Packages Containing Lead. 含铅的包装。
. +240^(@)C+240^{\circ} \mathrm{C}
Operating Temperature Range -40^(@)C to +125^(@)C
Junction Temperature +150^(@)C
Storage Temperature Range -65^(@)C to +150^(@)C
Lead Temperature (soldering, 10s) +300^(@)C
Soldering Temperature (reflow)
Lead(Pb)-Free Packages +260^(@)C
Packages Containing Lead. . +240^(@)C| Operating Temperature Range | $-40^{\circ} \mathrm{C}$ to $+125^{\circ} \mathrm{C}$ |
| :---: | :---: |
| Junction Temperature | $+150^{\circ} \mathrm{C}$ |
| Storage Temperature Range | $-65^{\circ} \mathrm{C}$ to $+150^{\circ} \mathrm{C}$ |
| Lead Temperature (soldering, 10s) | $+300^{\circ} \mathrm{C}$ |
| Soldering Temperature (reflow) | |
| Lead(Pb)-Free Packages | $+260^{\circ} \mathrm{C}$ |
| Packages Containing Lead. | . $+240^{\circ} \mathrm{C}$ |
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 超出“绝对最大额定值”下列出的应力可能会对设备造成永久性损坏。这些只是应力额定值,并不暗示设备在这些条件或任何其他超出规范操作部分指示的条件下的功能运行。长时间暴露在绝对最大额定值条件下可能会影响设备的可靠性。