On-chip integrated signal conditioning with Honeywell's new humidity sensors
Keywords Honeywell, Sensors, Humidity, Moisture
Honeywell's new range of high performance, chemically resistant, relative humidity sensors offer signal conditioning and a thermoset capacitive element to simplify electrical design-in and ensure high accuracy (+2%RH) and fast response in demanding environments. Typical applications include dew point and other absolute moisture measurement, instrumentation and high volume OEM use (see Plate 5).
Plate 5Honeywell's high performance, relative humidity sensors offer signal conditioning and a thermoset capacitive element to simplify electrical design-in and ensure high accuracy and fast response in demanding environments
The HIH 3600 Series integrated CMOS humidity sensor combines a sensing element with built-in signal conditioning and linearisation circuitry on-chip with the RH capacitor. On-board signal conditioning reduces product development times while laser trimmed interchangeability eliminates the need for system level calibration. The output signal is a DC voltage, linear with %RH and ratiometric to the supply voltage. A typical current supply of 200 µA at 5 VDC makes the sensor suitable for battery powered systems. Operating range is 0 to 100% RH, non-condensing, within a temperature range of -40°C to +85°C.
The sensor construction consists of a planar capacitor with a second polymer layer to protect against dirt, dust, oils and other hazards. Three basic sensor packages are available: a monolithic IC humidity device with an integral precision Resistance Temperature Detector in a TO-5 housing with a hydrophobic sintered stainless steel filter, an integrated circuit humidity sensor in a TO-39 housing and an IC humidity sensor with 0.1 inch lead pitch Single In-Line Package (SIP).
For further information please contact: Mary Jo O'Brien, Communications Officer, Sensing and Control, Honeywell Control Systems Ltd, Newhouse Industrial Estate, Motherwell ML1 5SB, Scotland, UK. Tel: +44 (0) 1698 481197; Fax: +44 (0)1698 481493; E-mail: mary-jo.o'brien@uk.honeywell.com
