AD595 AD [Analog Devices], AD595 Datasheet
AD595
Available stocks
Related parts for AD595
AD595 Summary of contents
Page 1
... The alarm output has a flexible format which includes TTL drive capability. The AD594/AD595 can be powered from a single ended supply (including +5 V) and by including a negative supply, tempera- tures below 0 C can be measured. To minimize self-heating, an unloaded AD594/AD595 will typically operate with a total sup- ply current 160 A, but is also capable of delivering in excess load ...
Page 2
... Calibrated for minimum error at +25 C using a thermocouple sensitivity of 51 Since a J type thermocouple deviates from this straight line approximation, the AD594 will normally read 3.1 mV when the measuring junction The AD595 will similarly read 2 Defined as the slope of the line connecting the AD594/AD595 errors measured and 50 C ambient temperature. ...
Page 3
... SINGLE AND DUAL SUPPLY CONNECTIONS The AD594/AD595 is a completely self-contained thermocouple conditioner. Using a single +5 V supply the interconnections shown in Figure 1 will provide a direct output from a type J thermocouple (AD594) or type K thermocouple (AD595) mea- suring from +300 C. 10mV/ C Any convenient supply voltage from + +30 V may be ...
Page 4
... THERMOCOUPLE CONNECTIONS The isothermal terminating connections of a pair of thermo- couple wires forms an effective reference junction. This junction must be kept at the same temperature as the AD594/AD595 for the internal cold junction compensation to be effective. A method that provides for thermal equilibrium is the printed circuit board connection layout illustrated in Figure 3. ...
Page 5
... EXAMPLE: TYPE E RECALIBRATION—AD594/AD595 Both the AD594 and AD595 can be configured to condition the output of a type E (chromel-constantan) thermocouple. Tem- perature characteristics of type E thermocouples differ less from type J, than from type K, therefore the AD594 is preferred for recalibration ...
Page 6
... If the setpoint temperature range is within the operating range (– +125 C) of the AD594/AD595, the chip can be used as the transducer for the circuit by shorting the inputs together and utilizing the nominal calibration of 10 mV/ C. This is the centi- grade thermometer configuration as shown in Figure 13 ...
Page 7
... AD594/AD595 temperature with a scale factor this three termi- nal, voltage output, temperature sensing mode, the AD594/ AD595 will operate over the full military – +125 C tem- perature range. –7– AD594/AD595 ...
Page 8
... Temperature for Ice Point Reference T2 The temperature sensitivity of silicon integrated circuit transis- tors is quite predictable and repeatable. This sensitivity is ICE POINT exploited in the AD594/AD595 to produce a temperature re- REFERENCE lated voltage to compensate the reference of “cold” junction of a thermocouple as shown in Figure 16. T1 Figure 16. Connecting Isothermal Junctions Since the compensation is at the reference junction temperature often convenient to form the reference “ ...