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Digital Humidity and Temperature Sensor - SHT11

Size: 7.5 x 4.9 x 2.6 mm
Output: digital (2-wire Interface)
Supply voltage range: 2.4 to 5.5 V
Energy consumption: 80μW (at 12bit, 3V, 1 measurements/ s)
RH operating range: 0 - 100% RH
T operating range: -40 to +125°C (-40 to +257°F)
RH response time: 8 sec (tau63%)

Model Number: SHT11
Data Sheet:

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Product Specification

SHT11 Digital Humidity and Temperature Sensor Product Summary

SHT1x (including SHT10, SHT11 and SHT15) is Sensirion’s family of surface mountable relative humidity and temperature sensors. The sensors integrate sensor elements plus signal processing on a tiny foot print and provide a fully calibrated digital output. A unique capacitive sensor element is used for measuring relative humidity while temperature is measured by a band-gap sensor. The applied CMOSens? technology guarantees excellent reliability and long term stability. Both sensors are seamlessly coupled to a 14bit analog to digital converter and a serial interface circuit. This results in superior signal quality, a fast response time and insensitivity to external disturbances (EMC).

Each SHT1x humidity sensor is individually calibrated in a precision humidity chamber. The calibration coefficients are programmed into an OTP memory on the chip. These coefficients are used to internally calibrate the signals from the sensors. The two-wire serial interface and internal voltage regulation allows for easy and fast system integration. SHT1x is supplied in a surface-mountable LCC (leadless chip carrier), which is approved for standard reflow soldering processes.

SHT11 Digital Humidity and Temperature Sensor FEATURES
? Fully calibrated
? Digital output
? Low power consumption
? Excellent long term stability
? SMD type package – reflow solderable

SHT11 Digital Humidity and Temperature Sensor PERFORMANCE
Relative Humidity

Parameter	Condition	min	typ	max	Units
Resolution		0.4	0.05	0.05	%RH
Resolution		8	12	12	bit
Accuracy	typical		±3.0		%RH
Accuracy	maximal	see Figure 2
Repeatability			±0.1		%RH
Hysteresis			±1		%RH
Non-linearity	linearized		<<1		%RH
Response time	τ (63%)		8		s
Operating Range		0		100	%RH
Long term drift	normal		< 0.5		%RH/yr

Temperature

Parameter	Condition	min	typ	max	Units
Resolution		0.04	0.01	0.01	°C
Resolution		12	14	14	bit
Accuracy	typical		±0.4		°C
Accuracy	maximal	see Figure 3
Repeatability			±0.1		°C
Operating Range		-40		123.8	°C
Operating Range		-40		254.9	°F
Response Time	τ (63%)	5		30	s
Long term drift			< 0.04		°C/yr

Electrical and General Items

Parameter	Condition	min	typ	max	Units
Source Voltage		2.4	3.3	5.5	V
Power Consumption	sleep		2	5	μW
	measuring		3		mW
	average		90		μW
Communication	digital 2-wire interface, see Communication
Storage	10 - 50°C (0 - 125°C peak), 20 - 60%RH

Other Series:

Series	Typ. Humidity Accuracy %RH	Typ. Temperature Accuracy °C	Supply Voltage Range V	Interface	Package Size (L x W x H) mm
SHT30	±2	±0.2	2.4 to 5.5	I2C, analog voltage	2.5 x 2.5 x 0.9
SHT31	±2	±0.2	2.4 to 5.5	I2C, analog voltage	2.5 x 2.5 x 0.9
SHT35	±1.5	±0.1	2.4 to 5.5	I2C	2.5 x 2.5 x 0.9
SHTW1	±3	±0.4	1.62 to 1.98	I2C	1.3 x 0.7 x 0.5
SHTW2	±3	±0.4	1.62 to 1.98	I2C	1.3 x 0.7 x 0.5
SHTC1	±3	±0.3	1.62 to 1.98	I2C	2 x 2 x 0.8
SHT20	±3	±0.3	2.1 to 3.6	I2C, PWM, SDM	3 x 3 x 1.1
SHT21	±2	±0.3	2.1 to 3.6	I2C, PWM, SDM	3 x 3 x 1.1
SHT25	±1.8	±0.2	2.1 to 3.6	I2C	3 x 3 x 1.1
SHT10*	±4.5	±0.5	2.4 to 5.5	Digital Sbus	7.5 x 4.9 x 2.6
SHT11*	±3	±0.4	2.4 to 5.5	Digital Sbus	7.5 x 4.9 x 2.6
SHT15*	±2	±0.3	2.4 to 5.5	Digital Sbus	7.5 x 4.9 x 2.6
SHT71	±3	±0.4	2.4 to 5.5	Digital Sbus	19.5 x 5.08 x 3.1
SHT75	±1.8	±0.3	2.4 to 5.5	Digital Sbus	19.5 x 5.08 x 3.1
*Not recommended for new design (NRND); newer products available