【应用】国产四路高压运放SGM8270-4XS14G/TR用于红外摄像仪，具有高转换速率、低噪声、高精度等特点

时间： 2022-09-16 来源：世强

技术问答

红外技术在1800年被英国天文学家发现之后，就被越来越多的科学家应用在各种场合的研究中，原理一般是由红外发光二极管产生红外辐射，产生人眼看不见而普通摄像机能捕捉到的红外光，辐射景物和环境；再利用图像传感器可以感受红外光的光谱特性（即可以感受可见光，也可以感受红外光），去感受周围环境反射回来的红外光，从而获取比较清晰的黑白图像画面，简要应用链路如图。

客户的红外摄像仪项目需选用一款四路的低噪声精密高压运算放大器，用于传感器光电转换后的信号调理与放大，要求单电源可支持30V高压，高压摆率以及工业级温度范围。本文介绍国产圣邦微电子的四路高压运放 SGM8270-4XS14G/TR，可在3.3V至36V单电源或±1.65V至±18V双电源范围内工作，提供高转换率、低噪声、偏置电流和偏移电压，温度区间宽，符合客户应用要求。详细的产品参数及引脚配置图如下所示：

这款四高压运放SGM8270-4具有如下优势：

1、支持3.3V至36V单电源供电或±1.65V至±18V双电源供电，可以满足绝大多数应用场合，大大减小局限性，并且提供-40~+125℃的宽温区间保证芯片可靠性；

2、具有8V/μs的高转换速率，助力实现快速电压转换，在信号来了时能够准确及时跟上；

3、输入电压噪声密度低至15nV/√Hz，可很好地提升系统低噪声性能；

4、输入偏移电压典型值为0.2mV，最大值为1.2mV，使其输出信号误差更小，精度更高。

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【应用】国产四路低噪声精密高压运算放大器SGM8270用于PCR仪，压摆率8V/μs，失调电压最大1.2mV

在PCR仪这一类项目中，普通的运算放大器在精度和处理速度方面难以满足，恰好SGMICRO圣邦微推出的SGM8270-4XS14G/TR运算放大器在客户96孔PCR仪中实现了成功应用，本文将着重介绍这款运算放大器芯片的应用优势。

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【产品】四通道低噪声精密高压运算放大器SGM8270-4，噪声低至15nV/√Hz，支持轨到轨输入和输出

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描述- SGMICRO specializes in high-performance and high-quality analog and mixed-signal integrated circuits, and is committed to building a comprehensive portfolio of the highest quality analog and mixed-signal integrated circuits to address all customer needs.

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