PMFC3000
6Pages

Microsystems, Inc.Mass Air Flow Sensors Description Posifa’s PMFc3000 series of Mass Air Flow Sensors offer pin compatible upgrade solutions to the popular AWM3000 series. Using the robust Posifa Thermal Flow Sensor Die, and incorporating the latest microcontroller technology, PMFc3000 offers drastically improved interchangeability (< 2% full scale), temperature stability (< 4% reading from 0°C to +50° C), and resistance to adverse environmental factors such as dust particles and water vapor that have plagued the aWm3000. Tailored to meet the exacting packaging and calibration specifications of AWM3000, PMFc3000 also offers enhanced interchangeability by improving the output tolerance by 200% to < 2% full scale. Additionally, PMFc3000 is temperature compensated to < 4% reading drift over the temperature range of 0°C to +50°C. Posifa designed the PMFc3000 series of Mass Air Flow Sensors from the ground up, incorporating the latest MEMS and microelectronics innovations. The sensor die uses a pair of thermopiles to detect changes in temperature gradient caused by mass flow, delivering ultra-low noise to signal, and unsurpassed repeatability. The “solid state” thermal isolation on the die eliminates the need for surface cavity or fragile membrane, making the sensor resistant to clogging (from water vapor or dust particles) and pressure shock. The sensor’s signal conditioning circuitry leverages off-the-shelf microcontroller, providing proven reliability and low cost. Applications in medical, industrial and transportation industries are benefiting by: • Taking advantage of tighter tolerances • Eliminating complicated and expensive temperature compensation schemes • Inherent immunity to adverse environmental factors Features • Resistance to dust, water vapor and shock • Sensitivity to low flows • Amplified analog output 1 - 5V • Digitally improved sensor interchangeability (2% F.S. Max.) • Replaced AWM3000 series sensors Applications • HVAC damper control • Industrial process control • Medical respirators, ventilators, O2 concentrators and anesthesia equipment • Gas leak detectors • Gas analyzing, monitoring and metering equipment Maximum Ratings • Operating Temperature: -25 °C to 85 °C • Storage Temperature: -40 °C to 90 °C • Humidity: 0 to 100% RH 1 • Shock: 100 g peak (5 drops, 3 axis) • Common Mode Pressure: 1.72 Bar 2 1. Sensor is resistant to water condensation 2. 10 bar common mode pressure model is also available POSIFA Microsystems, Inc., 1925 Zanker Rd., San Jose CA 95112 USA www.posifamicrosystems.com • Tel: +1-650-6465788 European Distribution: BS-rep GmbH Eichertstrasse 68, 56745 Weibern, Germany www.sensor-rep.de •

Test Conditions: Vin=10±0.01VDC, Ta=25°C. Relative Humidity: 40%<RH<60% PARAMETERS Wetted Materials Silicon carbide, Epoxy, PPS, FR4, Silicone as static seal 1. SCCM standard conditions: 0°C, 1013.23 mbar 2. Output voltage resolution is 4 mV (10-bit) 3. Null tolerance for PMFc3150V is ± 0.1V 4. Accuracy for PMFc3150V is 2.5% F.S. Max 5. A series resistance of 5 ohms on the source supply will reduce inrush current to under 250 mA (duration: 8 ms) POSIFA Microsystems, Inc., 1925 Zanker Rd., San Jose CA 95112 USA www.posifamicrosystems.com • Tel: +1-650-6465788

Output Flow vs. Interchangeability; Supply =10VDC, Ta=25°C POSIFA Microsystems, Inc., 1925 Zanker Rd., San Jose CA 95112 USA www.posifamicrosystems.com • Tel: +1-650-6465788

Output Flow vs. Interchangeability; Supply =10VDC, Ta=25°C POSIFA Microsystems, Inc., 1925 Zanker Rd., San Jose CA 95112 USA www.posifamicrosystems.com • Tel: +1-650-6465788

Output Flow vs. Interchangeability; Supply =10VDC, Ta=25°C POSIFA Microsystems, Inc., 1925 Zanker Rd., San Jose CA 95112 USA www.posifamicrosystems.com • Tel: +1-650-6465788

Ordering Information Part Number POSIFA Microsystems, Inc., 1925 Zanker Rd., San Jose CA 95112 USA www.posifamicrosystems.com • Tel: +1-650-6465788