• Difference between AD5700 and AD5700-1

    What is the difference between the AD5700 & AD5700-1 products?

  • Key features of the AD5700/AD5700-1 HART Modem

    What are the key features of the AD5700 & AD5700-1 HART Modem products?

  • AD5700/AD5700-1 & Full Duplex Operation

    Q.

    Can the AD5700/AD5700-1 support Full Duplex Operation?

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    A.

    HART is, by nature, half duplex. It uses one channel (one pair of wires) for both directions. If one side is transmitting and…

  • Ad5420 interfacing with AD5700-1

    • Hi

    I'm using AD5420 and AD5700-1 same as cn0270 in my design. 

    I'm getting hart out as a fsk over sine wave instead of fsk over DC line.

    I tried interfacing same hart circuit with ad5421 which is working fine. 

    But with ad5420 I'm getting below…

  • AD5700-1 Filter SEL

    Hi

    I'm using AD5700-1 in my design.

    I'll be using external filter in my design. Whether it is allowed to provide FILTER SEL as high even when I'm using external filter and hart in is disconnected.

    Regards

    Nidhi P Shetty

  • AD5700/AD5700-1 RXD Activity After HART Carrier Off

    Referring to Figure 6, this plot is used to demonstrate “Carrier detect off” time (t5 in Table 3 of the datasheet). This is the time from carrier (i.e. HART signal) off to the CD signal falling edge. The time is 6 bit times max. The RXD signal behavior…

  • AD5700/AD5700-1 "A and B models?"

    The AD5700/AD5700-1 data sheet states that specifications apply to both A and B models ( i.e. "all specifications are from -40°C to +125°C and relate to both A and B models, unless otherwise noted"), but I'm unable to ferret-out what distinguishes between…

  • AD5700/AD5700-1 Clear To Send (CTS)

    Hi,

    The HART Protocol Token-Passing Data Link Layer Specification (HCF_SPEC-81 Revision 8.2) talks about Service Access Points (SAPs) that must be supported by a field device.

    One of the Physical Layer SAPs is described as follows:

    "ENABLE.confirm…

  • 急！！AD5700-1输出不正常求助

    参考CN0267画的电路图，AD5700始终不工作（怀疑是外部晶振的问题），后来换了AD5700-1，使用内部震荡且使能CLKOUT，但是示波器检测，CLKOUT无波形，AD5700-1的TXD引脚输入0X55，波形如下，但是HART_OUT引脚输出波形不对，如下图，这会是什么什么问题呢？备注：电路板默认配置使用AD5700的，使用AD5700-1时采用电路板割线和飞线进行的，不知道是否有干扰。

    图一、AD5700-1的TXD引脚输入0X55

    图二、AD5700-1的HART_OUT…

  • AD5700/AD5700-1 Rx/Tx Pin Z in Power-down and Powered Off?

    Are the AD5700/AD5700-1 Rx and Tx pins in hi-z (essentially benign) when the part is powered-off and/or held in reset?