What is the difference between the AD5700 & AD5700-1 products?
What are the key features of the AD5700 & AD5700-1 HART Modem products?
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…
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…
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
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…
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…
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…
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…
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?