Programmable

Digital Vibration Sensor

Preliminary Technical Data

ADIS16220

Rev. PrE

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FEATURES

Digital ±70 g accelerometer/vibration sensing

22 kHz sensor resonance

100.2 kSPS sample rate

SPI-compatible serial interface

Programmable data capture function:

3 channels, 1024 samples each

1 accelerometer/2 auxiliary ADCs (AIN1, AIN2)

Manual trigger for user initiation

Automatic trigger for periodic data capture

Conditional trigger for condition-driven capture

Digital temperature sensor output

Digitally controlled sample rate

Digitally controlled frequency response

2 auxiliary digital I/Os

Digitally activated self-test

Digitally activated low power mode

Serial number and device ID

Single-supply operation: 3.15 V to 3.6 V

Operating temperature range: −40°C to +125°C

9.2 mm × 9.2 mm 16-terminal LGA

APPLICATIONS

Vibration analysis

Shock detection and event capture

Condition monitoring

Machine health

Instrumentation, diagnostics

Safety, shut-off sensing

Security sensing, tamper detection

GENERAL DESCRIPTION

The ADIS16220 iSensor® is a digital vibration sensor that com-

bines industry-leading iMEMS® sensing technology with a signal

processor. It provides a buffer memory for high speed data capture,

along with a convenient serial interface for data collection and

configuration. The 22 kHz sensor resonance and 100.2 kSPS

sample rate provide adequate response for most machine-health

applications. The averaging/decimating filter provides

optimization for lower bandwidth applications.

An internal clock drives the data sampling system, which fills

the buffer memory for user access. The data capture function

has three different trigger modes. The automatic data collection

allows for periodic wake-up and capture, based on a programma-

ble duty cycle. The manual data capture mode allows the user to

initiate a data capture, providing power and read-rate optimiza-

tion. The event capture mode continuously updates the buffers

and monitors them for a preset trigger condition. This mode

captures pre-event data and post-event data and produces an

alarm indicator for driving an interrupt.

The serial peripheral interface (SPI) and data buffer structure

provide convenient access to wide-bandwidth sensor data. The

ADIS16220 also offers a digital temperature sensor, digital

power supply measurements, and peak output capture.

The ADIS16220 comes in a 9.2 mm × 9.2 mm × 3.9 mm LGA

package that meets the Pb-free solder reflow profile require-

ments per JEDEC J-STD-020 and has an extended operating

temperature range of −40°C to +125°C.

FUNCTION BLOCK DIAGRAM

CAPTURE

BUFFER

ADIS16220

FILTER

ALARMS

I/O

SELF-TEST

USER

CONTROL

REGISTERS

SPI

PORT

OUTPUT

DATA

REGISTERS

CONTROLLER

CLOCK

MEMS

SENSOR

TEMP

SENSOR

POWER

MANAGEMENT

CS

SCLK

DIN

DOUT

GND

VDD

RST

DIO1

DIO2

AIN1

AIN2

VREF

Figure 1.