The ISL71590SEH is a temperature-to-current transducer possessing two terminals. It has a high impedance current output that allows it to be insensitive to voltage drops across long lines. When provided a voltage between 4V and 33V, the device acts as a constant current regulator that generates a current equal to 1µA/Kelvin (K).
The ISL71590SEH is specified over the -55°C to +125°C temperature range and with ±1.7°C accuracy without the need of additional circuitry, and also capable of operating up to +150°C. With power requirements as low as 1.5mW (5V at +25°C), it is an ideal choice for remote sensing applications as any well-insulated twisted pair cable will allow for proper operation.
It can be used in several additional applications including temperature compensation networks, flow rate analysis, anemometry and biasing proportional to absolute temperature.
The high output impedance (>10MΩ) leaves plenty of room for variations in the power supply voltage. It is electrically durable as it can withstand a forward operating voltage of 33V over the full temperature range both under and without ion beam radiation and a reverse voltage of -40V.
The ISL71590SEH is available in a 2 lead flatpack and die forms.
Features
- 50krad(Si) low dose rate (ELDRS) shift: < 1°C
- Linear output current: 1µA/K
- Wide power supply input range: 4V to 33V
- Low power consumption: 1.5mW at 5V
- High output impedance provides excellent rejection to variations in the supply line
- Additional linearization circuitry is not needed for operation
- Operating temperature range: -55°C to +150°C
- QML qualified per MIL-PRF-38535 requirements
- Radiation environment
- SEL/SEB LETTH: 86.4 MeV●cm2/mg
- Total dose, high dose rate: 300krad(Si)
- Total dose, low dose rate: 50krad(Si)
- Electrically screened to SMD# 5962-13215
Applications
- RF power amplifier bias compensation
- LCD bias compensation
- Laser diode bias compensation
- Sensor bias and linearization
- Data acquisition systems
