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问答 AD5422电流脚与电压脚同一端口输出，电流输出模式下，Vout脚不是高阻状态，会灌进去电流

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AD5422电流脚与电压脚同一端口输出，电流输出模式下，Vout脚不是高阻状态，会灌进去电流

cll1 on Jun 16, 2021

ad5422电压输出引脚与电流输出引脚同一端口输出，电流输出模式下。电流会从电压引脚灌进去。造成芯片发热。

测试vout脚到gnd电阻为1.1k，与芯片手册不符，数据手册说说明在电流输出模式下，vout引脚应该是高阻状态！

请收到邮件后回复，谢谢

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nandin
Jun 17, 2021 +1 verified
有具体的原理图和测试吗

+1 nandin

on Jun 17, 2021 6:46 AM
有具体的原理图和测试吗
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0 cll1 on Jun 17, 2021 6:48 AM in reply to nandin
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0 cll1 on Jun 17, 2021 6:50 AM in reply to cll1

测试时将vout脚断开，电流输出正常，
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0 nandin

on Jun 24, 2021 7:12 AM in reply to cll1
意思是连接这VOUT的话，IOUT功能也不正常？RSET用的外部吗？
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0 cll1 on Jun 25, 2021 8:32 AM in reply to nandin

RSET是外部电阻。意思是电流输出模式下，电流会从VOUT脚灌进到芯片。造成输出电流精度不够。芯片也发热
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