DAT-0001, rev.4.1

notice.

CPS120

Digital Barometer

Consensic

Overview

The CPS120 is a capacitive absolute pressure sensor solution with a

fully calibrated pressure and temperature compensated digital

output for low pressure applications, such as barometric sensing.

Low current consumption (<1µA @ 25°C in Sleep Mode) and

operating supply voltage range 2.3V to 5.5V targets battery and

other low-power applications.

The CPS120SiP (System-in-a-Package) solution comprises of an

ultra-small capacitive MEMS pressure sensor and a conditioning

ASIC for accurate pressure measurements. An integrated sigma-

delta based ADC combined with internal calibration logic provides

accurate pressure and temperature measurements to the

application via the SPI or I²C interface. There is no need to

separately download internal calibration coefficients and have the

host microcontroller conduct complicated compensation

calculations. Two selectable modes (Sleep and Update)and an

external “Measurement Ready” pin ensure operational flexibility

suitable for a wide range of applications.

Applications

 Altimeters

 Portable and Stationary Barometers

 Weather Stations

 GPS Applications

 Hard Disk Drives (HDD)

 Industrial Equipment

 Air Control Systems

 Vacuum Systems

Benefits

 Low Power Consumption. Excellent for Battery and Other

Low-Power Applications

 External Clock not Required

 High Resistance to Sensing Media

Features

 Factory CalibratedPressure and Temperature Sensor

 Programmable Temperature and Pressure Sample Rate and

Resolution (8, 10, 12 or 14bit)

 Sampling Rates as Fast as 0.7ms @ 8-bit, 1.6ms @ 10-bit,

5.0ms @ 12-bit, 18.5ms @14-bit

 Supply Voltage: 3.0V ±10%

 Absolute Temperature Range: -40°C to +85°C

 Pressure Accuracy: <±0.2kPa (<±2.0mbar) @ 25°C

 Temperature Accuracy: ±1.0°C

 Internal Logic with Two Selectable States (Sleep and

Update Mode)

 Altitude Resolution Better Than 1.0meter (50cm) in Update

Mode

Interfaces

 I²C

TM

* Compatible (100 and 400kHz)

 SPI (up to 800kHz), 3 Wire Half Duplex

Physical Characteristics

 Small Form Factor, 3 x 5 x 1.2mm (w x l x h)

 LGA Package, 8 Lead

 Top Side Sensing Port