AD596:  Thermocouple Conditioner and Setpoint Controller Operates with Type J Thermocouple

The AD596/AD597 is a monolithic temperature setpoint controller which has been optimized for use at elevated temperatures such as those found in oven control applications. The device cold junction ...More

AD596:  Thermocouple Conditioner and Setpoint Controller Operates with Type J Thermocouple

Product Description

The AD596/AD597 is a monolithic temperature setpoint controller which has been optimized for use at elevated temperatures such as those found in oven control applications. The device cold junction compensates and amplifies a type J or K thermocouple input to derive an internal signal proportional to temperature. The internal signal is then compared with an externally applied setpoint voltage to yield a low impedance switched output voltage. Dead-Band or switching hysteresis can be programmed using a single external resistor. Alternately, the AD596/ AD597 can be configured to provide a voltage output (10 mV/°C) directly from a type J or K thermocouple signal. It can also be used as a stand-alone voltage output temperature sensor.

The AD596/AD597 can be powered with a single supply from +5 V to +30 V, or dual supplies up to a total span of 36 V. Typical quiescent supply current is 160 µA which minimizes self-heating errors.

The AD596/AD597 H package option includes a thermocouple failure alarm that indicates an open thermocouple lead when operated in the temperature proportional measurement mode. The alarm output has a flexible format which can be used to drive relays, LEDs or TTL logic.

The device is packaged in a reliability qualified, cost effective 10-pin metal can, 8-pin plastic mini-DIP or SOIC and is trimmed to operate over an ambient temperature range from +25°C to +100°C. Operation over an extended ambient temperature range is possible with slightly reduced accuracy. The AD596 will amplify thermocouple signals covering the entire -200°C to +760°C temperature range recommended for type J thermocouples while the AD597 can accommodate -200°C to +1250°C type K inputs.

The AD596/AD597 has a calibration accuracy of ±4°C at an ambient temperature of 60°C and an ambient temperature stability specification of 0.05°C/°C from +25°C to +100°C. If higher accuracy, or a lower ambient operating temperature is required, either the AD594 (J thermocouple) or AD595 (K thermocouple) should be considered.

*Protected by U.S. Patent No. 4,029,974.

Features

  • Operates with Type J (AD596) or Type K (AD597) Thermocouples
  • Built-In Ice Point Compensation
  • Temperature Proportional Operation – 10 mV/°C
  • Low Cost
  • Temperature Setpoint Operation – ON/OFF
  • Programmable Switching Hysteresis
  • High Impedance Differential Input

Diagrams

AD596 Diagram
Typical Application Circuit for AD596

Specifications

Output Type Analog
Sensor Output +10 mV/°C
Temp Res(°C/LSB) n/a
Supply Voltage Range +Vs to -Vs = 30Vmax
Temp Range(s) -55 to +125

Explore Other Products

Part# Temp Res(°C/LSB) 25°C Temp Error (Deg C) Resolution (Bits) # Chan DAC Outputs Interface Temp Range(s) Supply Voltage Range Product Description Price* (1000-4999) Sensor Output
TMP03 0.3 ±3 16 0 --- PWM -40 to +100 +4.5V to +7V Serial PWM-Output Temperature Sensor w/ Open-Collector Output $3.27 PWM
TMP04 0.3 ±3 16 0 --- PWM -40 to +100 +4.5V to +7V Serial PWM-Output Temperature Sensor w/ CMOS/TTL Output $3.27 PWM
AD7814 0.25 n/a 10 0 --- Serial, SPI -55 to +125 +2.7V to +5.5V 10-Bit Digital Temperature Sensor in 6-Lead SOT-23 $1.00 DSP Serial, MICROWIRE (TM), QSPI (TM), SPI (TM)
AD7414 0.25 n/a 10 0 --- I2C, Serial -40 to +125 +2.7V to +5.5V SMBus/I2C, 10-Bit Digital Temperature Sensor in 6-Pin SOT w/ SMBus Alert and Over-Temperature Pin $1.04 I²C ®, SMBus
AD7415 0.25 ±2 10 0 --- I2C, Serial -40 to +125 +2.7V to +5.5V SMBus/I2C, 10-Bit Digital Temperature Sensor in 5-Pin SOT $1.04 I²C ®, SMBus
AD7416 0.25 n/a 10 0 --- I2C, Serial -40 to +125 +2.7V to +5.5V 10-Bit Temperature-to-Digital Converter, -40°C to +125°C, ±2°C Accuracy $1.00 I²C ®
AD7314 0.25 ±1 10 0 --- Serial, SPI -35 to +85 +2.65V to +5.5V Low Voltage, 10-Bit Digital Temperature Sensor in 8-Lead µSOP $0.66 DSP Serial, MICROWIRE (TM), QSPI (TM), SPI (TM)
AD7818 0.25 ±1 10 1 --- Serial, SPI -40 to +85 +2.7V to +5.5V 9 µs, 10-Bit ADC w/ On-Chip Temperature Sensor & Over-Temperature Output $2.34 MICROWIRE (TM), QSPI (TM), SPI (TM)
AD7418 0.25 ±1 10 2 --- I2C, Serial -40 to +125 +2.7V to +5.5V 10-Bit ADC, Programmable Hi-Low Temp Limits w/ Over-Temp Alert, , Auto Pwr Dwn @ EOC $2.34 I²C ®
ADT7316 0.25 ±0.5 10 3 12-Bit x 4 I2C, I2C/SPI, Serial, SM Bus, SPI -40 to +120 +2.7V to +5.5V SPI/I2C® Compatible,10-Bit Digital Temperature Sensor With Quad Voltage-Output 12-Bit DAC $6.46 I²C ®, QSPI (TM), SMBus, SPI (TM)
ADT7317 0.25 ±0.5 10 3 10-Bit x 4 I2C, I2C/SPI, SM Bus, SPI -40 to +120 +2.7V to +5.5V SPI/I2C® Compatible,10-Bit Digital Temperature Sensor w/ Quad 10-Bit Voltage Output DAC $3.51 DSP Serial, I²C ®, MICROWIRE (TM), QSPI (TM), SMBus, SPI (TM)
ADT7318 0.25 +0.5 10 3 8-Bit x 4 I2C, I2C/SPI, Serial, SM Bus, SPI -40 to +120 +2.7V to +5.5V SPI/I2C® Compatible,10-Bit Digital Temperature Sensor & Quad Voltage Output 8-Bit DAC $2.23 DSP Serial, I²C ®, MICROWIRE (TM), QSPI (TM), SMBus, SPI (TM)
AD7817 0.25 ±1 10 4 --- Serial, SPI -40 to +85 +2.7V to +5.5V 4-Channel, 9 µs, 10-Bit ADC with On-Chip Temperature Sensor & Over-Temperature Flag $3.29 MICROWIRE (TM), QSPI (TM), SPI (TM)
AD7417