High-Accuracy, Dual-Axis

Digital Inclinometer and Accelerometer

Preliminary Technical Data

ADIS16209

Rev. PrA

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FEATURES

Dual-mode inclinometer system

Dual–axis, inclinometer configuration, ±30°

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 sensitivity and 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 interfaceAuxiliary 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 (±30°)

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

•

Programmable alarm conditions

Configurable operating parameters include

•

Sample rate

•

Power management

•

Digital filtering

•

Auxiliary analog and digital output

•

Offset/null adjustment

•

Self-test, for sensor’s mechanical structure

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

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

to +125°C. It is capable of being attached using standard RoHS-

compliant solder reflow processes.