High-Accuracy, Dual-Axis

Digital Inclinometer and Accelerometer

ADIS16209

Rev. 0

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FEATURES

Dual-mode inclinometer system

Dual-axis, horizontal operation, ±90°

Single-axis, vertical operation, ±180°

High accuracy, 0.1°

14-bit digital inclination data, 0.025° resolution

14-bit digital acceleration data, 0.244 mg resolution

±1.7 g accelerometer measurement range

12-bit digital temperature sensor output

Digitally controlled bias calibration

Digitally controlled sample rate

Digitally controlled frequency response

Dual alarm settings with rate/threshold limits

Auxiliary digital I/O

Digitally activated self-test

Digitally activated low power mode

SPI-compatible serial interface

Auxiliary 12-bit ADC input and DAC output

Single-supply operation: 3.0 V to 3.6 V

3500 g powered shock survivability

APPLICATIONS

Platform control, stabilization, and alignment

Tilt sensing, inclinometers, leveling

Motion/position measurement

Monitor/alarm devices (security, medical, safety)

Navigation

FUNCTIONAL BLOCK DIAGRAM

SCLK

DIN

DOUT

CS

RST

DIO1 DIO2

SPI

PORT

TEMPERATURE

SENSOR

SELF-TEST

POWER

MANAGEMENT

AUXILIARY

I/O

ALARMS

DIGITAL

CONTROL

SIGNAL

CONDITIONING

AND

CONVERSION

CALIBRATION

AND

DIGITAL

PROCESSING

ADIS16209

VDD

GND

AUX

ADC

AUX

DAC VREF

DUAL-AXIS

ACCELEROMETER

Figure 1.

GENERAL DESCRIPTION

The ADIS16209 is a high-accuracy, digital inclinometer that

accommodates both single axis (±180°) and dual-axis (±

90°)

operation. The standard supply voltage (3.3 V) and serial

peripheral interface (SPI) serial interface enable simple

integration into most industrial system designs. A simple

internal register structure handles all output data and

configuration features. This includes access to the following

output data: calibrated acceleration, accurate incline angles,

power supply, internal temperature, auxiliary analog and digital

input signals, diagnostic error flags, and programmable alarm

conditions.

Configurable operating parameters include sample rate,

power management, digital filtering, auxiliary analog and

digital output, offset/null adjustment, and self-test for sensor

mechanical structure.

The ADIS16209 is available in a 9.2 mm × 9.2 mm × 3.9 mm

LGA package that operates over a temperature range of −40°C

to +125°C. It can be attached using standard RoHS-compliant

solder reflow processes.