Si7050/3/4/5-A20

Rev. 1.0

11

4. Functional Description

Figure 3. Si705x Block Diagram

The Si705x Digital Temperature Sensors offer industry-leading low power consumption and high accuracy across

the entire operating voltage and temperature range. These monolithic CMOS ICs feature a band-gap temperature

sensor element, an analog-to-digital converter with up to 14-bit resolution, signal processing, calibration data, and

their accuracy over a wide temperature and voltage range, while consuming very little current.

The temperature sensors are factory-calibrated and the calibration data is stored in the on-chip non-volatile

memory. This ensures that the sensors are fully interchangeable, with no recalibration or software changes

required.

at up to 400 kHz. Requiring just 195nA of average current when sampled once per second, the Si705x can operate

for several years with just a single coin cell battery.

The Si705x devices offer an accurate, low-power, factory-calibrated digital solution ideal for measuring

temperature in applications ranging from HVAC/R and asset tracking to industrial and consumer platforms.

ADC

GND

SCL

Si705x

Temp

Sensor

SDA

Vdd

1.25V

Ref

Voltage

Regulator

Calibration

Memory

Control Logic