PANJIT PJ85718 Digital Temperature Sensor
PANJIT PJ85718 Digital Temperature Sensor is a remote and local temperature sensor with ±1°C accuracy. Temperature data can be read directly via the SMBus interface by the MCU or SoC. PJ85718 has two independent channels: one remote and one local sensor. The remote sensor could be connected to an external Diode or BJT transistor (diode-connected mode).
Each chip is factory-calibrated before shipment to customers. There is no need to recalibrate for ±1°C accuracy anymore. It includes a band-gap circuit, an analog-to-digital converter, a calibration unit with non-volatile memory, and a digital interface block.
The PANJIT PJ85718 integrates an 11-bit ADC that offers 0.125°C resolution. The maximum temperature readout range is up to +160°C, with an offset-shifting register. It has two logic output pins (/ALERT, /THERM) with open-drain structure, which are active low by default.
Features
- 1.75V to 5.5V operation voltage
- 45µA at 1.0con/s average quiescent current
- 3.0µA (max.) standby current
- Temperature accuracy without calibration
- ±1°C from 0°C to +100°C
- ±2°C from -4°C to +125°C
- 11-bit ADC for 0.125°C resolution
- Digital interface compatible with SMBus, 2-wire, and I2C
- Temperature range up to +160°C, plus offset shifting register for remote sensor channel
- Programmable over/under alarm temperature and hysteresis temperature
- Independent remote and local temperature sensing channel
- Support SMBus ALERT response address
- -40°C to +125°C temperature range
Applications
- Desktop and notebook computers
- Telecom equipment
- Multi-cell battery packs
- Smart HVAC systems
Application Schematic
Block Diagram
