CCS811

Digital Gas Sensor

The CCS811 is a digital gas sensor from ams-OSRAM. View the full CCS811 datasheet below including electrical characteristics, absolute maximum ratings.

Manufacturer

ams-OSRAM

Overview

Part: CCS811 — ams Type: Ultra-Low Power Digital Gas Sensor Description: The CCS811 is an ultra-low power digital gas sensor solution integrating a metal oxide (MOX) gas sensor to detect Volatile Organic Compounds (VOCs) for indoor air quality monitoring, with an integrated MCU, ADC, and I²C interface.

Operating Conditions:

Supply voltage: 1.8–3.3 V
Operating temperature: -5 to 50 °C
I²C bus frequency: 10–400 kHz

Absolute Maximum Ratings:

Max supply voltage: 3.6 V
Max supply current: 30 mA (In mode 1)
Max power consumption: 60 mW (In mode 1)
Max storage temperature: 125 °C

Key Specs:

Supply Current (measuring): 26 mA (Typ, at 1.8V)
Supply Current (average over pulse cycle): 0.7 mA (Typ, at 1.8V)
Supply Current (Sleep Mode): 19 μA (Typ, at 1.8V)
Power Consumption (Mode 1 & 4): 46 mW (Typ, at 1.8V)
Power Consumption (Mode 3): 1.2 mW (Typ, at 1.8V)
eCO₂ output range: 400ppm to 8192ppm
TVOC output range: 0ppb to 1187ppb

Features:

Integrated MCU for sensor drive modes and raw data management
On-board processing for eCO₂ or TVOC indication
Standard I²C digital interface
Optimised low-power modes
Small form-factor 2.7mm x 4.0mm x 1.1mm LGA package
Automatic and Manual Baseline Correction
Optional NTC circuit for ambient temperature sensing
Interrupt and Interrupt on Threshold functionality

Applications:

Smart phones
Wearables
Home and Building automation
Accessories

Package:

10 lead 2.7mm x 4.0mm x 1.1mm, 0.6mm pitch LGA package

Features

The benefits and features of CCS811, Ultra-Low Power Digital Gas Sensor for Monitoring Indoor Air Quality are listed below:

Figure 2: CCS811 Block Diagram

Applications

This device can be mainly used for indoor air quality monitoring in:

Smart phones
Wearables
Home and Building automation
Accessories

Pin Configuration

Figure 3: Pin Diagram

Pin Diagram:

The Exposed Pad is underneath

Figure 4:

CCS811 LGA Pin Assignment

Pin No.	Pin Name	Description
1	ADDR	Single address select bit to allow alternate address to be selected • When ADDR is low the 7 bit I²C address is decimal 90 / hex 0x5A • When ADDR is high the 7 bit I²C address is decimal 91 / hex 0x5B.
2	nRESET	nRESET is an active low input and is pulled up to V DD by default. nRESET is optional but external 4.7KΩ pull-up and/or decoupling of the nRESET pin may be necessary to avoid erroneous noise-induced resets.
3	nINT	nINT is an active low optional output. It is pulled low by the CCS811 to indicate end of measurement or a set threshold value has been triggered.
4	PWM	Heater driver PWMoutput. Pins 4 and 5 must be connected together.
5	Sense	Heater current sense. Pins 4 and 5 must be connected together.
6	V DD	Supply voltage
7	nWAKE	nWAKE is an active low input and should be asserted by the host prior to an I²C transaction and held low throughout.
8	AUX	Optional AUX pin which can be used for ambient temperature sensing with an external NTC resistor. If not used leave unconnected.
9	SDA	SDA pin is used for I²C data. Should be pulled up to V DD with a resistor
10	SCL	SCL pin is used for I²C clock. Should be pulled up to V DD with a resistor
EP	Exposed Pad	Connect to ground

Electrical Characteristics

Figure 6: Electrical Characteristics

Parameters	Conditions	Min	Typ (6)	Max	Units
Supply Voltage (V DD ) (1), (2)		1.8		3.3	V
Supply Current (I DD ) (3)	During measuring at 1.8V		26		mA
Supply Current (I DD ) (3)	Average over pulse cycle (3) at 1.8V		0.7		mA
Supply Current (I DD ) (3)	Sleep Mode at 1.8V		19		μA
Power Consumption	Idle Mode 0 at V DD = 1.8V		0.034		mW
Power Consumption	Mode 1 & 4 at V DD = 1.8V		46		mW
Power Consumption	Mode 2 at V DD = 1.8V		7		mW
Power Consumption	Mode 3 at V DD = 1.8V		1.2		mW
Logic High Input (5)	nRESET, nWAKE, ADDR	V DD - 0.6		V DD	V
Logic Low Input (5)	nRESET, nWAKE, ADDR	0		0.6	V
Logic High Output	nINT	V DD - 0.7			V
Logic Low Output	nINT			0.6	V
Analogue Input	AUX	0		V DD	V

The supply voltage V DD is sampled during boot and should not vary during operation
The maximum V DD ramp time for Power On is 3ms
Typical values for 1.8V supply voltage (V DD )
Average Supply Current (I DD ) for a sensor measurement once every 60 seconds
For SDA and SCL timing refer NXP I²C - bus specification and user manual UM10204
Typical values at 25 o C and 50% RH

Figure 7:

Absolute Maximum Ratings

Figure 5: Absolute Maximum Ratings

Symbol	Parameter	Min	Max	Units	Comments
Electrical Parameters	Electrical Parameters	Electrical Parameters	Electrical Parameters	Electrical Parameters	Electrical Parameters
V DD (1)	Supply Voltage	1.8 (2)	3.6	V
I DD	Supply Current		30	mA	In mode 1
P	Power Consumption		60	mW	In mode 1
Electrostatic Discharge	Electrostatic Discharge	Electrostatic Discharge	Electrostatic Discharge	Electrostatic Discharge	Electrostatic Discharge
ESD HBM	Human Body Model	±2000	±2000	V
Environmental Conditions	Environmental Conditions	Environmental Conditions	Environmental Conditions	Environmental Conditions	Environmental Conditions
T AMB	Ambient Temperature for Operation	-5	50	o C
T STRG	Storage Temperature	-40	125	o C
RH NC	Relative Humidity (non-condensing)	10	95	%
MSL	Moisture Sensitivity Level	1	1		Unlimited max. floor life time

The supply voltage V DD is sampled during boot and should not vary during operation.
The minimum supply voltage V DD is 1.8V and should not drop below this value for reliable device operation.

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under Electrical Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability

Typical Application

Figure 8: Recommended Application Circuit

Pull-up resistors for SCL and SDA assumed will be part of host system.
AUX Pin on CCS811 can be used for optional ambient temperature sensing, if not used leave unconnected.
If power is not an issue, nWake can be connected to ground if a spare GPIO is not available on the host processor.

Package Information

	Symbol	Dimensions	Dimensions	Dimensions
		Min	Nominal	Max
Total thickness	A	-	-	1.1
Body Size	D		4.0	BSC
Body Size	E		2.7	BSC
Lead Width	W	0.25	0.3	0.35
Lead Length	L	0.45	0.5	0.55
Lead Pitch	e		0.6	BSC
Lead Count	n		10
Edge Lead Centre to Centre	D1		2.4	BSC
Edge Lead Centre to Centre	E1		2.2	BSC

Figure 24: LGA Package Drawings

All dimensions are in millimeters.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
CCS811B-JOPD	ams-OSRAM	—
CCS811B-JOPR	ams-OSRAM	—

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