The data to be loaded to the AD421's input shift register takes two forms; normal 4 mA t0 20 mA data or alarm current data. The first form is where the AD421 0perates over its normal 4 mA t0 20 mA output range with 16 bits of resolution between these endpoints. The second form allows the user to program a current value outside this range as an indication from the trans- mitter than there is a problem with the transducer. The AD421 counts the number of clock pulses which it receives between LATCH signals as a means of determining whether the data clocked in is 4 mA t0 20 mA data or alarm current data.
TMS320LF2401A Price| Parameter | Symbol | Values | Unit |
| min | typ. | max | |
| | | | | |
| Case Styles |
| 120NQ...(R) 1n L] nr :: c]7 ,r.ril_..jLi :Cfr _uo t(-'i"r .LV'i:,i:ie D-67 |
