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General Description 一般描述

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 1 / f 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 μ A 600 μ A 600 muA600 \mu \mathrm{~A}. An activelow shutdown mode decreases supply current to 0.1 μ A 0.1 μ A 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 / f 1 / f 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 μ A 600 μ A 600 muA600 \mu \mathrm{~A} 。低电平有效关断模式将电源电流降至 0.1 μ A 0.1 μ A 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 ≥ 10 V / V A V ≥ 10 V / V 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 ≥ 10 V / V A V ≥ 10 V / V 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
  • Ultra-Low, 0.1 μ V 0.1 μ V 0.1 muV0.1 \mu \mathrm{~V} Offset Voltage
    超低、 0.1 μ V 0.1 μ V 0.1 muV0.1 \mu \mathrm{~V} 失调电压
  • 2.0 μ V 2.0 μ V 2.0 muV2.0 \mu \mathrm{~V} (max) at + 25 ∘ C + 25 ∘ C +25^(@)C+25^{\circ} \mathrm{C}
    2.0 μ V 2.0 μ V 2.0 muV2.0 \mu \mathrm{~V} （最大） + 25 ∘ C + 25 ∘ C +25^(@)C+25^{\circ} \mathrm{C}
  • 2.5 μ V 2.5 μ V 2.5 muV2.5 \mu \mathrm{~V} (max) at − 40 ∘ C − 40 ∘ C -40^(@)C-40^{\circ} \mathrm{C} to + 85 ∘ C + 85 ∘ C +85^(@)C+85^{\circ} \mathrm{C}
    2.5 μ V 2.5 μ V 2.5 muV2.5 \mu \mathrm{~V} （max） at − 40 ∘ C − 40 ∘ C -40^(@)C-40^{\circ} \mathrm{C} 到 + 85 ∘ C + 85 ∘ C +85^(@)C+85^{\circ} \mathrm{C}
  • 3.5 μ V 3.5 μ V 3.5 muV3.5 \mu \mathrm{~V} (max) at − 40 ∘ C − 40 ∘ C -40^(@)C-40^{\circ} \mathrm{C} to + 125 ∘ C + 125 ∘ C +125^(@)C+125^{\circ} \mathrm{C}
    3.5 μ V 3.5 μ V 3.5 muV3.5 \mu \mathrm{~V} （max） at − 40 ∘ C − 40 ∘ C -40^(@)C-40^{\circ} \mathrm{C} 到 + 125 ∘ C + 125 ∘ C +125^(@)C+125^{\circ} \mathrm{C}
  • Low 10 n V / ∘ C 10 n V / ∘ C 10 nV//^(@)C10 n \mathrm{~V} /{ }^{\circ} \mathrm{C} Drift 低 10 n V / ∘ C 10 n V / ∘ C 10 nV//^(@)C10 n \mathrm{~V} /{ }^{\circ} \mathrm{C} 漂移
  • Low Noise: 1.5 μ V P − P 1.5 μ V P − P 1.5 muV_(P-P)1.5 \mu \mathrm{~V}_{\mathrm{P}-\mathrm{P}} from DC to 10 Hz
    低噪声： 1.5 μ V P − P 1.5 μ V P − P 1.5 muV_(P-P)1.5 \mu \mathrm{~V}_{\mathrm{P}-\mathrm{P}} 从 DC 到 10 Hz
  • 150dB AV 150dB 音视
  • High Gain-Bandwidth Product
    高增益带宽积
  • 1MHz (MAX4238) 1兆赫 （MAX4238）
  • 6.5MHz (MAX4239) 6.5兆赫 （MAX4239）
  • Ground-Sensing Input 接地感应输入
  • Rail-to-Rail Output ( R L = 1 k Ω R L = 1 k Ω (R_(L)=1kOmega:}\left(R_{L}=1 \mathrm{k} \Omega\right. )
    轨到轨输出 ( R L = 1 k Ω R L = 1 k Ω (R_(L)=1kOmega:}\left(R_{L}=1 \mathrm{k} \Omega\right. ）
  • Low Power Consumption Reduces System Power
    低功耗降低了系统功耗
  • Single 2.7V to 5.5V Supply Voltage Range
    2.7V 至 5.5V 单电源电压范围
  • 600 A Supply Current 600 A 电源电流
  • 0.1 μ A 0.1 μ A 0.1 muA0.1 \mu \mathrm{~A} Shutdown Mode  0.1 μ A 0.1 μ A 0.1 muA0.1 \mu \mathrm{~A} 关机模式
  • Low Power Consumption Reduces System Power
    低功耗降低了系统功耗
  • AEC-Q100 Qualified, Refer to Ordering Information for the List of / N / N //N/ N Parts
    符合 AEC-Q100 标准，请参阅 / N / N //N/ N 零件清单的订购信息

Ordering Information appears at end of data sheet.
订购信息显示在数据表的末尾。

Pin Configurations appear at end of data sheet.
Pin Configurations 显示在数据表的末尾。

Absolute Maximum Ratings 绝对最大额定值

Power-Supply Voltage (VCC to GND)… 6 V
电源电压（VCC 到 GND）...6 伏
All Other Pins … (VGND - 0.3V) to ( V CC + 0.3 V V CC + 0.3 V V_(CC)+0.3V\mathrm{V}_{\mathrm{CC}}+0.3 \mathrm{~V} )
所有其他引脚 ...（VGND - 0.3V） 至 （ V CC + 0.3 V V CC + 0.3 V V_(CC)+0.3V\mathrm{V}_{\mathrm{CC}}+0.3 \mathrm{~V} ）
Output Short-Circuit Duration
输出短路持续时间
(OUT shorted to VCC or GND) qquad\qquad Continuous
（OUT 短接至 VCC 或 GND） qquad\qquad 连续的
Continuous Power Dissipation ( T A = + 70 ∘ C T A = + 70 ∘ C T_(A)=+70^(@)C\mathrm{T}_{\mathrm{A}}=+70^{\circ} \mathrm{C} )
Continuous Power Dissipation （连续功率耗散） （ T A = + 70 ∘ C T A = + 70 ∘ C T_(A)=+70^(@)C\mathrm{T}_{\mathrm{A}}=+70^{\circ} \mathrm{C} ）
6-Pin Plastic SOT23 6 引脚塑料 SOT23 封装
(derate 9.1 mW / ∘ C 9.1 mW / ∘ C 9.1mW//^(@)C9.1 \mathrm{~mW} /{ }^{\circ} \mathrm{C} above + 70 ∘ C + 70 ∘ C +70^(@)C+70^{\circ} \mathrm{C} ) qquad\qquad .727 mW
（以上降额 9.1 mW / ∘ C 9.1 mW / ∘ C 9.1mW//^(@)C9.1 \mathrm{~mW} /{ }^{\circ} \mathrm{C} ） + 70 ∘ C + 70 ∘ C +70^(@)C+70^{\circ} \mathrm{C} qquad\qquad .727 毫瓦
8-Pin Plastic SO (derate 5.88 mW / ∘ C 5.88 mW / ∘ C 5.88mW//^(@)C5.88 \mathrm{~mW} /{ }^{\circ} \mathrm{C} above + 70 ∘ C + 70 ∘ C +70^(@)C+70^{\circ} \mathrm{C} )… 471 mW
8 针塑料 SO （以上 + 70 ∘ C + 70 ∘ C +70^(@)C+70^{\circ} \mathrm{C} 降额 5.88 mW / ∘ C 5.88 mW / ∘ C 5.88mW//^(@)C5.88 \mathrm{~mW} /{ }^{\circ} \mathrm{C} ）...471 毫瓦
6 -Pin TDFN-EP (derate 18.2 mW above + 70 ∘ C + 70 ∘ C +70^(@)C+70^{\circ} \mathrm{C} ) qquad\qquad 1454mW
6 针 TDFN-EP （降额 18.2 mW 以上 + 70 ∘ C + 70 ∘ C +70^(@)C+70^{\circ} \mathrm{C} ） qquad\qquad 1454mW
Operating Temperature Range
工作温度范围		 − 40 ∘ C − 40 ∘ C -40^(@)C-40^{\circ} \mathrm{C} to + 125 ∘ C + 125 ∘ C +125^(@)C+125^{\circ} \mathrm{C}  − 40 ∘ C − 40 ∘ C -40^(@)C-40^{\circ} \mathrm{C} 自 + 125 ∘ C + 125 ∘ C +125^(@)C+125^{\circ} \mathrm{C}
Junction Temperature 结温 + 150 ∘ C + 150 ∘ C +150^(@)C+150^{\circ} \mathrm{C}
Storage Temperature Range
存储温度范围		 − 65 ∘ C − 65 ∘ C -65^(@)C-65^{\circ} \mathrm{C} to + 150 ∘ C + 150 ∘ C +150^(@)C+150^{\circ} \mathrm{C}  − 65 ∘ C − 65 ∘ C -65^(@)C-65^{\circ} \mathrm{C} 自 + 150 ∘ C + 150 ∘ C +150^(@)C+150^{\circ} \mathrm{C}
Lead Temperature (soldering, 10s)
引线温度（焊接，10 秒）		 + 300 ∘ C + 300 ∘ C +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 ∘ C +260^(@)C+260^{\circ} \mathrm{C}
Packages Containing Lead.
含铅的包装。		 . + 240 ∘ C + 240 ∘ C +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。

Electrical Characteristics
电气特性

( 2.7 V ≤ V CC ≤ 5.5 V , V CM = V GND = 0 V , V OUT = V CC / 2 , R L = 10 k Ω 2.7 V ≤ V CC ≤ 5.5 V , V CM = V GND = 0 V , V OUT = V CC / 2 , R L = 10 k Ω (2.7(V) <= V_(CC) <= 5.5(V),V_(CM)=V_(GND)=0(V),V_(OUT)=V_(CC)//2,R_(L)=10kOmega:}\left(2.7 \mathrm{~V} \leq \mathrm{V}_{\mathrm{CC}} \leq 5.5 \mathrm{~V}, \mathrm{~V}_{\mathrm{CM}}=\mathrm{V}_{\mathrm{GND}}=0 \mathrm{~V}, \mathrm{~V}_{\mathrm{OUT}}=\mathrm{V}_{\mathrm{CC}} / 2, \mathrm{R}_{\mathrm{L}}=10 \mathrm{k} \Omega\right. connected to V CC / 2 , SHDN ― = V CC , T A = + 25 ∘ C V CC / 2 , SHDN ¯ = V CC , T A = + 25 ∘ C V_(CC)//2, bar(SHDN)=V_(CC),T_(A)=+25^(@)C\mathrm{V}_{\mathrm{CC}} / 2, \overline{\mathrm{SHDN}}=\mathrm{V}_{\mathrm{CC}}, \mathrm{T}_{\mathrm{A}}=+25^{\circ} \mathrm{C}, unless otherwise noted.)
( 2.7 V ≤ V CC ≤ 5.5 V , V CM = V GND = 0 V , V OUT = V CC / 2 , R L = 10 k Ω 2.7 V ≤ V CC ≤ 5.5 V , V CM = V GND = 0 V , V OUT = V CC / 2 , R L = 10 k Ω (2.7(V) <= V_(CC) <= 5.5(V),V_(CM)=V_(GND)=0(V),V_(OUT)=V_(CC)//2,R_(L)=10kOmega:}\left(2.7 \mathrm{~V} \leq \mathrm{V}_{\mathrm{CC}} \leq 5.5 \mathrm{~V}, \mathrm{~V}_{\mathrm{CM}}=\mathrm{V}_{\mathrm{GND}}=0 \mathrm{~V}, \mathrm{~V}_{\mathrm{OUT}}=\mathrm{V}_{\mathrm{CC}} / 2, \mathrm{R}_{\mathrm{L}}=10 \mathrm{k} \Omega\right. 连接到 V CC / 2 , SHDN ― = V CC , T A = + 25 ∘ C V CC / 2 , SHDN ¯ = V CC , T A = + 25 ∘ C V_(CC)//2, bar(SHDN)=V_(CC),T_(A)=+25^(@)C\mathrm{V}_{\mathrm{CC}} / 2, \overline{\mathrm{SHDN}}=\mathrm{V}_{\mathrm{CC}}, \mathrm{T}_{\mathrm{A}}=+25^{\circ} \mathrm{C} ，除非另有说明。
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Offset Voltage 输入失调电压 V OS V OS V_(OS)\mathrm{V}_{\mathrm{OS}} (Note 1) （注 1） 0.1 2 μ V μ V muV\mu \mathrm{V}
Long-Term Offset Drift 长期偏移漂移 50 nV/1000hr nV/1000 小时
Input Bias Current 输入偏置电流 B B  ^("B "){ }^{\text {B }} (Note 2) （注 2） 1 pA 百分之一
Input Offset Current Input Offset Current（输入失调电流） los 洛杉矶 (Note 2) （注 2） 2 pA 百分之一
Peak-to-Peak Input Noise Voltage
峰峰值输入噪声电压		 e nP − P e nP − P e_(nP-P)\mathrm{e}_{\mathrm{nP}-\mathrm{P}} R S = 100 Ω , 0.01 Hz R S = 100 Ω , 0.01 Hz R_(S)=100 Omega,0.01Hz\mathrm{R}_{\mathrm{S}}=100 \Omega, 0.01 \mathrm{~Hz} to 10 Hz
R S = 100 Ω , 0.01 Hz R S = 100 Ω , 0.01 Hz R_(S)=100 Omega,0.01Hz\mathrm{R}_{\mathrm{S}}=100 \Omega, 0.01 \mathrm{~Hz} 至 10 Hz		 1.5 μ V P − P μ V P − P muV_(P-P)\mu \mathrm{V}_{\mathrm{P}-\mathrm{P}}
Input Voltage-Noise Density
输入电压 - 噪声密度		 e n e n e_(n)e_{n} f = 1 kHz f = 1 kHz f=1kHz\mathrm{f}=1 \mathrm{kHz} 30 NV / Hz NV / Hz NV//sqrtHz\mathrm{NV} / \sqrt{\mathrm{Hz}}
Common-Mode Input Voltage Range
共模输入电压范围		 V CM V CM V_(CM)\mathrm{V}_{\mathrm{CM}} Inferred from CMRR test 根据 CMRR 测试推断 V GND − 0.1 V GND − 0.1 {:[V_(GND)],[-0.1]:}\begin{aligned} & \mathrm{V}_{\mathrm{GND}} \\ & -0.1 \end{aligned} V CC − 1.3 V CC − 1.3 {:[V_(CC)],[-1.3]:}\begin{aligned} & V_{\mathrm{CC}} \\ & -1.3 \end{aligned} V
Common-Mode Rejection Ratio
共模抑制比		 CMRR − 0.1 V ≤ V CM ≤ V CC − 1.3 V − 0.1 V ≤ V CM ≤ V CC − 1.3 V -0.1V <= V_(CM) <= V_(CC)-1.3V-0.1 \mathrm{~V} \leq \mathrm{V}_{\mathrm{CM}} \leq \mathrm{V}_{\mathrm{CC}}-1.3 \mathrm{~V} (Note 1)  − 0.1 V ≤ V CM ≤ V CC − 1.3 V − 0.1 V ≤ V CM ≤ V CC − 1.3 V -0.1V <= V_(CM) <= V_(CC)-1.3V-0.1 \mathrm{~V} \leq \mathrm{V}_{\mathrm{CM}} \leq \mathrm{V}_{\mathrm{CC}}-1.3 \mathrm{~V} （注 1） 120 140 dB 分贝
Power-Supply Rejection Ratio
电源抑制比		 PSRR 2.7V ≤ V CC ≤ 5.5 V ≤ V CC ≤ 5.5 V <= V_(CC) <= 5.5V\leq \mathrm{V}_{\mathrm{CC}} \leq 5.5 \mathrm{~V} (Note 1)
2.7V ≤ V CC ≤ 5.5 V ≤ V CC ≤ 5.5 V <= V_(CC) <= 5.5V\leq \mathrm{V}_{\mathrm{CC}} \leq 5.5 \mathrm{~V} （注 1）		 120 140 dB 分贝
Large-Signal Voltage Gain
大信号电压增益		 Avol 阿沃尔 0.05 V ≤ V OUT ≤ V CC − 0.05 V 0.05 V ≤ V OUT  ≤ V CC − 0.05 V 0.05V <= V_("OUT ") <= V_(CC)-0.05V0.05 \mathrm{~V} \leq \mathrm{V}_{\text {OUT }} \leq \mathrm{V}_{\mathrm{CC}}-0.05 \mathrm{~V}