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PDF SI7055-A20 Data sheet ( Hoja de datos )
| Número de pieza | SI7055-A20 | |
| Descripción | I2C TEMPERATURE SENSORS | |
| Fabricantes | Silicon Laboratories | |
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Si7050/3/4/5-A20
I2C TEMPERATURE SENSORS
Features
High Accuracy Temperature Accuracy maintained over the
Sensors
entire operating temperature and
Si7053: ±0.3 °C (max)
voltage range
Si7054: ±0.4 °C (max)
Low Power Consumption
Si7055: ±0.5 °C (max)
195 nA average current @ 1 Hz
Si7050: ±1.0 °C (max)
sample rate
Wide operating voltage
14-bit resolution
(1.9 to 3.6 V)
Factory calibrated
–40 to +125 °C operating range I2C interface
3x3 mm DFN package
Applications
HVAC/R
Thermostats
White goods
Computer equipment
Portable consumer devices
Asset tracking
Cold chain storage
Battery protection
Industrial controls
Medical equipment
Ordering Information:
See page 19.
Pin Assignments
Top View
Description
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 an I2C interface.
The patented use of novel signal processing and analog design enables
the sensors to maintain 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.
The Si705x devices are available in a 3x3 mm DFN package, and the
industry-standard I2C interface can operate at up to 400 kHz. Requiring
just 195 nA 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.
SDA 1
GND 2
DNC 3
6 SCL
5 VDD
4 DNC
Patent Protected. Patents pending
Rev. 1.0 2/15
Copyright © 2015 by Silicon Laboratories
Si7050/3/4/5-A20
1 page  
Si7050/3/4/5-A20
Table 3. I2C Interface Specifications1
1.9 ≤ VDD ≤ 3.6 V; TA = –40 to +125 °C unless otherwise noted.
Parameter
Symbol
Test Condition
Min Typ Max Unit
Hysteresis
VHYS High-to-low versus low-to- 0.05 x VDD — — V
high transition
SCLK Frequency2
SCL High Time
SCL Low Time
Start Hold Time
Start Setup Time
Stop Setup Time
Bus Free Time
SDA Setup Time
SDA Hold Time
SDA Valid Time
SDA Acknowledge Valid Time
Suppressed Pulse Width3
fSCL
tSKH
tSKL
tSTH
tSTS
tSPS
tBUF
tDS
tDH
tVD;DAT
tVD;ACK
tSPS
Between Stop and Start
From SCL low to data valid
From SCL low to data valid
—
0.6
1.3
0.6
0.6
0.6
1.3
100
100
—
—
50
— 400 kHz
— — µs
— — µs
— — µs
— — µs
— — µs
— — µs
— — ns
— — ns
— 0.9 µs
— 0.9 µs
— — ns
Notes:
1. All values are referenced to VIL and/or VIH.
2. Depending on the conversion command, the Si705x may hold the master during the conversion (clock stretch). At
above 100 kHz SCL, the Si705x may also hold the master briefly for user register and device ID transactions. At the
highest I2C speed of 400 kHz the stretching will be <10 µs.
3. Pulses up to and including 50 ns will be suppressed.
Rev. 1.0
5
5 Page 
4. Functional Description
Vdd
Si705x
Voltage
Regulator
Si7050/3/4/5-A20
Calibration
Memory
Temp
Sensor
ADC
Control Logic
1.25V
Ref
I2C Interface
SDA
SCL
GND
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
an I2C interface. The patented use of novel signal processing and analog design enables the sensors to maintain
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.
The Si705x devices are available in a 3x3 mm DFN package, and the industry-standard I2C interface can operate
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.
Rev. 1.0
11
11 Page | ||
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| PDF Descargar | [ Datasheet SI7055-A20.PDF ] | |
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