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PGA309EVM进行校准的问题

Other Parts Discussed in Thread: PGA309

我现在利用PGA309进行校准实验,选用的是4wire_4p096_diode这个模型,这个模型设置的输出应该是0.5到4.5V,但是我校准之后在Auto_Cal界面显示0度时最大4.9293V,最小为0.33083V,50度和100度的输出值也和0度时差不多,想请问一下造成这样的问题原因可能有哪些?希望得到一些启发,谢谢。

另外,create sensor file这个界面里面没有菜单栏,但我的软件是从官网下载安装的。

  • The PGA309 is a programmable analog signal conditioner designed for bridge sensors.

    The core of the PGA309 is the precision, low-drift, no 1/f noise Front-End PGA (Programmable Gain Amplifier). The overall gain of the Front-End PGA + Output Amplifier can be adjusted from 2.7V/V to 1152V/V. The polarity of the inputs can be switched through the input mux to accommodate sensors with unknown polarity output. The Fault Monitor circuit detects and signals sensor burnout, overload, and system fault conditions.

    可见, 只是调整的 PGA 的增益

  • 我现在选择4wire_4p096_diode这个模式进行校准,本身输出应该是0.5~4.5V,但是校准之后的数据上限和下限都超出了,想请教这个情况的问题出在哪里?

  • 校准了增益, 还有电桥上面是不是也需要调整