AD594CD Analog Devices Inc, AD594CD Datasheet
![IC THERMOCOUPLE INSTR AMP 14CDIP](/photos/6/97/69706/505-14-cdip_heat_pad_sml.jpg)
AD594CD
Specifications of AD594CD
Related parts for AD594CD
AD594CD Summary of contents
Page 1
FEATURES Pretrimmed for Type J (AD594) or Type K (AD595) Thermocouples Can Be Used with Type T Thermocouple Inputs Low Impedance Voltage Output: 10 mV/ C Built-In Ice Point Compensation Wide Power Supply Range Low Power: ...
Page 2
... S S 300 160 300 100 AD594CD AD594CQ compensated signal, the following transfer functions should be used to determine the actual output voltages: AD594 output = (Type J Voltage + 16 V) AD595 output = (Type K Voltage + 11 V) 247.3 or conversely: Type J voltage = (AD594 output/193.4) – Type K voltage = (AD595 output/247.3) – ...
Page 3
Table I. Output Voltage vs. Thermocouple Temperature (Ambient + Thermocouple Type J AD594 Temperature Voltage Output –200 –7.890 –1523 –180 –7.402 –1428 –160 –6.821 –1316 –140 –6.159 –1188 –120 –5.426 –1046 –100 –4.632 –893 –80 ...
Page 4
AD594/AD595 CONSTANTAN (ALUMEL OVERLOAD DETECT AD594/ AD595 G G IRON (CHROMEL) COMMON Figure 2. Dual Supply Operation With a negative supply the output can indicate negative tem- peratures and drive grounded loads ...
Page 5
The AD594/AD595 also includes an input open circuit detector that switches on an alarm transistor. This transistor is actually a current-limited output buffer, but can be used up to the limit as a switch transistor for either pull-up or pull-down ...
Page 6
AD594/AD595 of R3 should be approximately 280 k . The final connection diagram is shown in Figure 7. An approximate verification of the effectiveness of recalibration is to measure the differential gain to the output. For type E it should ...
Page 7
ALARM CIRCUIT In all applications of the AD594/AD595 the –ALM connection, Pin 13, should be constrained so that it is not more positive than (V+) – This can be most easily achieved by connect- ing Pin 13 to ...
Page 8
AD594/AD595 THERMOCOUPLE BASICS Thermocouples are economical and rugged; they have reason- ably good long-term stability. Because of their small size, they respond quickly and are good choices where fast response is im- portant. They function over temperature ranges from cryogenics ...