Board Mount Temperature Sensors High-Accuracy 12-bit

Board Mount Temperature Sensors Temperature-Sensor

Thermostats Digital Thermometer and Thermostat

Board Mount Temperature Sensors Calibrated Digital Temperature Sensor

Board Mount Temperature Sensors

Board Mount Temperature Sensors Digital Temperature Sensor and Thermal Watchdog with 2-Wire Interface

Board Mount Temperature Sensors 5-Channel Precision Temperature Monitor

The DS620 digital thermometer and thermostatprovides low-voltage (1.7V < VDD < 3.5V) temperature measurements with ±0.5°C accuracy from 0°C to+70°C and an operating temperature range of -55°Cto +125°C. The DS620 communicates over a 2-wiredigital interface. For distributed-sensing applications,it is multidroppable with three address pins that allowup to eight DS620s to operate on a single bus.The DS620 has thermostat functionality with userdefinedthresholds stored in EEPROM registers, andit can be configured for standalone thermostatoperation. The programmable output (PO) pin servesas the thermostat output, and this pin can also beconfigured to function as an active-low control forperipheral devices.ApplicationsComputers/ServersIndustrialLow-Voltage Temperature-Sensitive ApplicationsMedical InstrumentsPortable ApplicationsTest Equipment

The AD590 is a two-terminal integrated circuit temperature transducer that produces an output current proportional to absolute temperature. For supply voltages between 4 V and 30 V the device acts as a high impedance, constant current regulator passing 1 µA/K. Laser trimming of the chip's thin-film resistors is used to calibrate the device to 298.2 µA output at 298.2K (25°C).The AD590 should be used in any temperature sensing application below 150°C in which conventional electrical temperature sensors are currently employed. The inherent low cost of a monolithic integrated circuit combined with the elimination of support circuitry makes the AD590 an attractive alternative for many temperature measurement situations. Linearization circuitry, precision voltage amplifiers, resistance measuring circuitry and cold junction compensation are not needed in applying the AD590.In addition to temperature measurement, applications include temperature compensation or correction of discrete components, biasing proportional to absolute temperature, flow rate measurement, level detection of fluids and anemometry.The AD590 is particularly useful in remote sensing applications. The device is insensitive to voltage drops over long lines due to its high impedance current output. Any well insulated twisted pair is sufficient for operation hundreds of feet from the receiving circuitry. The output characteristics also make the AD590 easy to multiplex: the current can be switched by a CMOS multiplexer or the supply voltage can be switched by a logic gate output.

The MAX1619 is a precise digital thermometer that reports the temperature of both a remote sensor and its own package. The remote sensor is a diode-connected transistor-typically a low-cost, easily mounted 2N3904 NPN type-that replaces conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The remote channel can also measure the die temperature of other ICs, such as microprocessors, that contain an on-chip, diode-connected transistor.The 2-wire serial interface accepts standard System Management Bus (SMBus™) Write Byte, Read Byte, Send Byte, and Receive Byte commands to program the alarm thresholds and to read temperature data. The data format is 7 bits plus sign, with each bit corresponding to 1°C, in two's complement format. Measurements can be done automatically and autonomously, with the conversion rate programmed by the user or programmed to operate in a single-shot mode. The adjustable rate allows the user to control the supply-current drain.The MAX1619 is nearly identical to the popular MAX1617A, with the additional feature of an overtemperature alarm output (active-low OVERT) that responds to the remote temperature; this is optimal for fan control.ApplicationsCentral Office Telecom EquipmentComputers: Desktop, Workstation, ServerIndustrial ControlsLAN ServersMultichip ModulesSmart Battery Packs/ChargersTest and Measurement Equipment