Product Introduction
The PJ85431 is a 2-channel digital temperature sensor with ±1°C accuracy. Temperature data can be read out directly via SMBus interface by MCU or SOC chip. PJ85431 has two independent channels : 1 x remote and 1 x local. The remote channel could be connected to an external Diode, BJT transistor (diode-connected mode), or parasitic PNP BJT transistor inside the CPU, GPU, FPGA or SOC chip. Based on this, this chip can be used to monitor CPU, GPU, MCU, SOC, FPGA or DSP chip die and case temperature. Each chip is calibrated in factory before shipment to customers. There is no need re-calibration anymore for ±1°C accuracy. It includes a band-gap circuit, an analog to digital converter (ADC), a calibration unit with non-volatile memory and a digital interface block. It integrates a 12-bit ADC, which can offer 0.0625°C resolution. The maximum temperature readout range can be extended from -64°C to 191°C by setting configuration1 register. It has 2 logic output pin (/ALERT and /THERM) with open drain structure, which are active low as default. Also /ALERT pin can be configured as /THERM2 pin. Available Package : MSOP-8P and DFN3x3-8.
