BMP585

Part: BMP585 — Bosch Sensortec

Type: Barometric Pressure Sensor

Description: Liquid-resistant 24-bit absolute barometric pressure sensor covering 300–1250 hPa with ±50 Pa max absolute accuracy, 1.3 μA typical at 1 Hz, and I2C/I3C/SPI interfaces.

Operating Conditions:

• Supply voltage: VDD 1.71–3.6 V; VDDIO 1.08–3.6 V
• Pressure range (full accuracy): 300–1250 hPa
• Interfaces: I2C, I3C, SPI (3-wire/4-wire)

Key Specs:

• Max absolute accuracy: ±50 Pa (P = 300–1100 hPa, T = -5 to 65 °C)
• Relative accuracy (typ.): ±6 Pa (p = 700–1100 hPa, T = 15–55 °C)
• Noise in pressure (typ.): 0.08 Pa RMS at highest resolution
• Temperature coefficient offset (typ.): ±0.5 Pa/K (-5 to 65 °C, 30–110 kPa)
• Long-term drift (typ.): ±0.2 hPa (12 months)
• Solder drift (typ.): ±0.6 hPa
• Average current (typ.): 1.3 μA at 1 Hz pressure and temperature; 0.55 μA in deep standby mode
• Oversampling: 0 to 128×; IIR filter coefficient 0 (off) to 127

Features:

• Gel-filled cavity for protection against water and chemicals
• Capacitive MEMS sensing element
• On-chip FIFO for up to 32 pressure samples
• Interrupts: FIFO watermark, FIFO full, data ready, pressure out-of-range, POR
• Power modes: sleep, continuous, normal, forced
• Built-in IIR filter
• Wide VDD and VDDIO supply ranges

Applications:

• Fitness applications in wearables and hearables
• Outdoor and indoor navigation
• Water-level measurement in home appliances such as washing machines
• Clog detection in white goods such as dryers
• Relative pressure change measurement in humidifiers or smart inhalers

Package:

• 9-pin metal-lid LGA, 3.25 x 3.25 x 1.86 mm³ (typ.)

Due to its water and chemical resistance, the BMP585 is perfectly suitable for wearables, hearables, industrial applications, or smart home appliances like air flow monitoring. Air flow monitoring is useful in different applications such as air conditioning or ventilation systems.

The new interrupt functionality provides simple access to data and storage. Examples of interrupts that can be used in a power efficient manner without using software algorithms include FIFO watermark interrupt, FIFO full interrupt, data ready interrupt, pressure out-of-range interrupt, power-on reset (POR) interrupt.

BMP585 also includes a new FIFO functionality. This greatly improves ease of use while helping to reduce power consumption of the overall device system during full operation. The integrated on-chip FIFO buffer for up to 32 pressure samples supports low-power applications and prevents data loss in non-real-time systems.

• Fitness applications in wearables and hearables with waterproof and robustness needs
• Outdoor and indoor navigation
• Water-level measurement in home appliances like washing machines
• Clog detection in white goods like dryers
• Measurement of relative pressure changes in humidifiers or smart inhalers