Si7057/8/9-A10
2
DIGITAL I C TEMPERATURE SENSOR
Features
High Accuracy Temperature Low Power Consumption
Sensor
50 nA, standby current
Si7057: 0.35 C (max), 0 to 70 C
Factory-calibrated
Si7058: 0.5 C (max), 0 to 70 C
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I C Interface
Si7059: 1.0 C (max), 0 to 70 C
2
Pin-selectable I C addresses
40 to +125 C operating range
2x2 mm QFN package
Low Voltage Operation (1.8 V)
Excellent long term stability
14-bit resolution
Applications
Ordering Information:
Mobile smartphones and tablets Asset and goods tracking
See page 17.
Consumer electronics Thermostats
HVAC/R Micro-environments/data centers
White goods Indoor weather stations
Pin Assignments
Description
2
DNC
The Si7057/8/9 I C Temperature Sensors are monolithic CMOS ICs that
integrate temperature sensor elements, an analog-to-digital converter,
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signal processing, calibration data, and an I C interface.
6
1 5
VDD GND
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 calibration or software changes
required.
2 4
SCL SDA
3
The Si7057/8/9 devices are available in a 2x2 mm DFN package and are
reflow solderable. The Si7057/8/9 sensors offer an accurate, low-power,
factory-calibrated digital solution ideal for measuring temperature in
ADD
applications ranging from HVAC/R and asset tracking to industrial and
consumer platforms.
Top View
Patent Protected. Patents pending
Rev. 1.1 4/17 Copyright 2017 by Silicon Laboratories Si7057/8/9-A10
Not Recommended for New DesignsSi7057/8/9-A10
Functional Block Diagram
Vdd
Si705x 1.25V Calibration
Ref Memory
Temp
Control Logic
Sensor
ADC
SDA
2
I C Interface
SCL
GND ADD
2 Rev. 1.1
Not Recommended for New Designs