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SI7013-A10-GM1R

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P43
Si7013
Rev. 0.95 13
The AD0/VOUT pin is a dual function pin. At powerup, it functions as an address select pin and selects the least
significant I
2
C Figure 5, the AD0/VOUT pin is pulled high, selecting AD0 = 1. In Figure 6, the AD0/VOUT pin is
pulled low selecting AD0 = 0.
Figure 6. Typical Application Circuit for Thermistor Interface with AD0 = 0
Figure 7. Typical Application Circuit for Single Ended 0 to 3 V Measurement
Figure 7 demonstrates a single ended 0 to 3 V input range configuration. The voltage reference is the internal
1.25 V reference. The 1 k and 2 k resistor divider keeps the voltage range to 1.0 V, which is within the
recommended 80% of V
REF
. Full scale of 32767 counts is 3.75 V.
C1
0.1µF
GNDD
V
DDD
SCL
SDA
Si7013
SCL
SDA
1.9 to 3.6V
AD0/VOUT
VINP
VINN
C2
0.1µF
R3
24k
R4
24k
V
DDA
GNDA
10
1
98
2
6
7
3
4
5
RST
R1
10k
R2
10k
TH1
10k
NTC
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Si7013
14 Rev. 0.95
3. Bill of Materials
Table 9. Typical Application Circuit BOM for Relative Humidity and Temperature Measurement
Reference Description Mfr Part Number Manufacturer
R1 Resistor, 10 k, ±5%, 1/16W, 0603 CR0603-16W-103JT Venkel
R2 Resistor, 10 k, ±5%, 1/16W, 0603 CR0603-16W-103JT Venkel
C1 Capacitor, 0.1 µF, 16 V, X7R, 0603 C0603X7R160-104M Venkel
U1 IC, Digital Temperature/humidity Sensor Si7013 Silicon Labs
Table 10. Typical Application Circuit BOM for Thermistor interface
Reference Description Mfr Part Number Manufacturer
R1 Resistor, 10 k, ±5%, 1/16W, 0603 CR0603-16W-103JT Venkel
R2 Resistor, 10 k, ±5%, 1/16W, 0603 CR0603-16W-103JT Venkel
R3 Resistor, 24 k, ±1%, 1/16W, 0603 CR0603-16W-2402F Venkel
R4 Resistor, 24 k, ±1%, 1/16W, 0603 CR0603-16W-2402F Venkel
C1 Capacitor, 0.1 µF, 16 V, X7R, 0603 C0603X7R160-104M Venkel
C2 Capacitor, 0.1 µF, 16 V, X7R, 0603 C0603X7R160-104M Venkel
TH1 Thermistor, 10 k NTCLE100E3103 Vishay
U1 IC, digital temperature/humidity sensor Si7013 Silicon Labs
Table 11. Typical Application Circuit BOM for Single Ended 0 to 3 V Measurement
Reference Description Mfr Part Number Manufacturer
R1 Resistor, 10 k, ±5%, 1/16W, 0603 CR0603-16W-103JT Venkel
R2 Resistor, 10 k, ±5%, 1/16W, 0603 CR0603-16W-103JT Venkel
R3 Resistor, 2 k, ±1%, 1/16W, 0603 CR0603-16W-2001F Venkel
R4 Resistor, 1 k, ±1%, 1/16W, 0603 CR0603-16W-1001F Venkel
C1 Capacitor, 0.1 µF, 16 V, X7R, 0603 C0603X7R160-104M Venkel
U1 IC, Digital Temperature/humidity Sensor Si7013 Silicon Labs
Si7013
Rev. 0.95 15
4. Functional Description
Figure 8. Si7013 Block Diagram
The Si7013 is a digital relative humidity and temperature sensor that integrates temperature and humidity sensor
elements, an analog-to-digital converter, signal processing, calibration, polynomial non-linearity correction, and an
I
2
C interface all in a single chip. The Si7013 is individually factory-calibrated for both temperature and humidity,
with the calibration data stored in on-chip non-volatile memory. This ensures that the sensor is fully
interchangeable, with no recalibration or changes to software required. Patented use of industry-standard CMOS
and low-K dielectrics as a sensor enables the Si7013 to achieve excellent long term stability and immunity to
contaminants with low drift and hysteresis. The Si7013 offers a low power, high accuracy, calibrated and stable
solution ideal for a wide range of temperature, humidity, and dew-point applications including medical and
instrumentation, high reliability automotive and industrial systems, and cost-sensitive consumer electronics.
The auxiliary sensor input option exists to use the ADC with external inputs and reference. Suitable buffers are
included to allow the part to be connected to high impedance circuitry such as bridges or other types of sensors,
without introducing errors.
While the Si7013 is largely a conventional mixed-signal CMOS integrated circuit, relative humidity sensors in
general and those based on capacitive sensing using polymeric dielectrics have unique application and use
requirements that are not common to conventional (non-sensor) ICs. Chief among those are:
The need to protect the sensor during board assembly, i.e., solder reflow, and the need to subsequently
rehydrate the sensor.
The need to protect the sensor from damage or contamination during the product life-cycle.
The impact of prolonged exposure to extremes of temperature and/or humidity and their potential effect on
sensor accuracy.
The effects of humidity sensor “memory”.
Each of these items is discussed in more detail in the following sections.
ADC
GND
Humidity
Sensor
Control Logic
SCL
Si7013
Temp
Sensor
1.25V
Ref
I
2
C Interface
SDA
AD0/VOUT
VSNS
Vdd
VINP
Calibration
Memory
Analog
Input
VINN
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SI7013-A10-GM1R

Mfr. #:
Buy SI7013-A10-GM1R
Manufacturer:
Silicon Labs
Description:
SENSOR HUMI/TEMP 3.6V I2C 2% DFN
Lifecycle:
New from this manufacturer.
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