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Merit Sensor LP2 Ultra-Low Pressure Sensors

Merit Sensor LP2 Ultra-Low Pressure Sensors are designed with full compensation for temperature and pressure nonlinearity, ensuring highly accurate pressure readings across various environmental conditions. This advanced feature means the LP2 sensors self-correct for temperature shifts, providing reliable data in all situations. Equipped with multiple communication interfaces and voltage ranges in a single package, the Merit Sensor LP2 components facilitate seamless integration and simplify design upgrades. These sensors also incorporate the proprietary Sentium® technology developed to provide a best-in-class operating temperature range and superior stability.

Features

  • Wide 150Pa to 7000Pa pressure range options
  • Total error band better than 1.5%FS (before reflow and without autozero)
  • Differential or gage pressure type
  • SMD solder pads, 1.27mm standard spacing
  • Digital I2C and SPI output, analog ratiometric 10% to 90% Vs
  • Low power mode
  • 10 to 100 times maximum operating burst pressure (depending on pressure range)
  • Wide 2.7V to 5.5V supply voltage
  • Autozero and output signal averaging
  • -10°C to +60°C compensated temperature range
  • -40°C to +85°C operating temperature range
  • RoHS-compliant

Applications

  • Industrial
    • Air flow
    • Heating, Ventilation, and Air Conditioning (HVAC)
    • Variable Air Volume (VAV)
  • Consumer sleep apnea/CPAP machines
  • Medical
    • Equipment for diagnosis and analysis
    • Ventilators
  • Dry non-corrosive gas pressure applications

Specifications

  • Electrical
    • 2.7V to 5.5V supply voltage range
    • 0.006mA to 3.3mA supply current range
    • 4000V maximum ESD protection
  • Performance
    • 10% to 90% of the counts output range
    • 16-bit to 22-bit resolution range
    • 2.5ms maximum start-up time
    • 2ms maximum wake-up time
    • 5ms typical update time (digital mode)
  • Accuracy
    • ±1.5% FSO digital mode
    • ±2.0% analog output
    • ±1% FS lifetime drift for 1000 hours at +85°C
    • 2.5x FS minimum static proof pressure
    • Burst pressure
      • 10psi minimum up to 1000Pa parts
      • 50psi minimum above 2500Pa parts
  • -40°C to +85°C operating temperature range
  • Dry, non-corrosive gas media type
  • Analog interface
    • 14-bit typical resolution
    • 12mA maximum output current
    • 1.33kHz to 1.58kHz output update rate
  • Digital interface
    • 400kHz maximum SCL clock frequency
    • 0.05MHz to 3MHz SPI interface clock frequency range
    • 50ns typical edge and first edge of SLCK, MOSI, or MISO
    • 50ns typical delay time between SS deactivation edge and last edge of SLCK, MOSI, or MISO
    • 10µS minimum delay between SS deactivation edge of the last command and of SS activation edge for the next command

Dimensions: mm

Mechanical Drawing - Merit Sensor LP2 Ultra-Low Pressure Sensors
Publicado: 2025-09-17 | Actualizado: 2025-09-30