CC-000017-DS revision: 3 Datasheet for CCS803 Ultra-low power gas sensor for Ethanol detection Key Benefits Technology Advantage Ultra-low power Our patented CMOS MEMS Micro-hotplate technology provides a consumption for battery unique silicon platform for our Metal Oxide (MOX) gas sensors and operated devices enables sensor miniaturisation, significantly lower power High sensitivity and fast consumption and fast heating times. response time Compact 2mm x 3mm Our resistive Micro-hotplates are fabricated using a robust silicon DFN package for small dioxide membrane and includes an embedded tungsten heater acting form factor designs as a heating element for the MOX based sensing material. The micro- hotplate can be used to heat the MOX material to up to 400C and its V = 1 1.8V REF electrical resistance can be monitored to detect the target gas. Through enabling fast heater cycling times, temperature modulation techniques can be used to reduce the device power consumption and RL implement advanced gas sensing methods. V OUT Advanced algorithms support the MOX gas sensors family, for maximum sensitivity, selectivity, drift compensation, and for self- R S 1 3 calibration enabling easy and timely integration into a wide range of Gas GND products and applications. R H 2 4 GND VH = 1.4V Product Overview Recommended Sensor The CCS803 is an ultra-low power MOX gas sensor for monitoring Configuration Ethanol. The sensitivity of CCS803 to Ethanol is optimised by adapting the Applications supply voltage (VH) of the integrated micro-heater, and the gas Alcohol breathalyser in concentration can be correlated to the change in resistance of the consumer devices MOX sensing layer (Rs). VH can be set using a low-dropout (LDO) regulator or operated in pulsed PWM mode to reduce power consumption. The sensor resistance (Rs) is determined using a series load resistor (RL), a reference voltage (VREF), and an output voltage (VOUT) read by an Analogue-to-Digital Converter (ADC). Miniaturisation The CCS803 is supported in a compact 2 mm x 3 mm DFN (Dual Flat No lead) package as standard. Other package options may be available on request. The inherent design of this sensor enables ultra- low power consumption for battery operated portable handheld devices. Cambridge CMOS Sensors Ltd, Deanland House, Cowley Road, Cambridge, CB4 0DL, UK Email: sales ccmoss.com Telephone: +44 1223 395 551 Date Issued: 19 Jan 2015 CC-000017-DS revision: 3 Datasheet for CCS803 Electrical characteristics Parameters Comments / Conditions Min Typical Max Units Heater voltage (V ) to set operating H Ethanol (~300C) 1.40 V temperature Powered at V in pulse mode H Average power consumption (P ) 6.8 mW AV 1 20% duty cycle Powered at V when DC H Peak power consumption (P ) 34 mW DC powered Heater resistance (R ) At 300 C 58 H Reference voltage (VREF) 1.0 1.8 V Load resistance (RL) 1 k Typical sensor resistance in air R at 0 0.1 1.0 10 k operating temperature Note: 1. Timing will vary depending on application and use case requirements Sensor performance 1 Gas type Test condition Sensitivity Factor Ethanol (C2H5OH) R0 / R100ppm 5 - 10 Note: 1. Defined as the sensors resistance in air (R ) divided by the sensors resistance at a specific gas 0 concentration level at 50% RH 2. A burn-in time of 24hrs is recommended to ensure sensor performance is consistent over longer period of time Cambridge CMOS Sensors Ltd, Deanland House, Cowley Road, Cambridge, CB4 0DL, UK Email: sales ccmoss.com Telephone: +44 1223 395 551 Date Issued: 19 Jan 2015