ANALOG DEVICES ADIS16220 Service Manual

Programmable

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 Event 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

Digital Vibration Sensor

ADIS16220

GENERAL DESCRIPTION

The ADIS16220 iSensor® is a digital vibration sensor that combines industry-leading iMEMS® sensing technology with signal processing, data capture, and a convenient serial peripheral interface (SPI). The SPI and data buffer structure provide convenient access to wide-bandwidth sensor data. 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 controls 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 programmable duty cycle. The manual data capture mode allows the user to initiate a data capture, providing power and read-rate optimization. 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 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 requirements per JEDEC J-STD-020 and has an extended operating temperature range of −40°C to +125°C.

FUNCTION BLOCK DIAGRAM

VDDRSTDIO1 DIO2

USER

OUTPUT

DATA

POWER

MANAGEMENT

SPI

PORT

GND

CS SCLK DIN DOUT

07980-001

ALARMSI/OSELF-TEST

MEMS

SENSOR

TEMP

SENSOR

IN1

IN2

ADIS16220

VREF

Rev. 0

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CLOCK

CONTROLLER

FILTER

CAPTURE

BUFFER

Figure 1.

CONTROL

REGISTERS