ADIS16228CMLZ – Complete Datasheet Summary
(Information extracted from Analog Devices ADIS16228.pdf, Rev. F, April 2018)

1. Device Overview1.1 Product NameADIS16228 – iSensor® Digital Triaxial Vibration Sensor with 512-point FFT Analysis & On-Chip Storage
2. 1.2 Full Ordering Code Highlighted
   ADIS16228CMLZ
   • Package: 15-lead metal module with flex-cable connector (ML-15-1)
   • Temperature Range: –40 °C to +125 °C
   • RoHS-compliant (Z suffix)
3. 1.3 One-Line Description
   A complete MEMS-based vibration-to-FFT sensor that digitises ±18 g acceleration on 3 axes at 20.48 kSPS, performs user-configurable 512-point real FFTs, stores 14 spectral records in flash, and reports results over an SPI port—no external processing required.
4. Feature Summary• Triaxial MEMS accelerometers with 5 kHz flat bandwidth (±5 %; extendable to 5 kHz via on-chip CAL_ENABLE)• Four user-selectable full-scale ranges: 1 g, 5 g, 10 g, 20 g (per axis & per sample-rate)• 512-sample time record per axis → 256-bin real FFT with rectangular, Hanning or flat-top windowing• FFT averaging: 1 – 255 averages per record (configurable per sample-rate)• 14 non-volatile flash records (stores header + FFT data for x, y, z)• Six programmable spectral alarm bands per axis (warning & fault levels)• Multiple trigger modes: SPI command, DIO pin, auto-timer, real-time streaming (single axis)• Decimation filter gives 11 sample-rate steps from 20.48 kSPS down to 20 SPS• Built-in temperature sensor (–40 → +125 °C, –0.47 °C/LSB) and VDD monitor (1.22 mV/LSB)• Digital I/O lines (DIO1/DIO2) configurable as busy, trigger, alarm or GPIO• Self-test with pass/fail flag• Single 3.0 V – 3.6 V supply; 40 mA typ active, 230 µA sleep• 15 mm × 24 mm × 15 mm aluminium module with M2/2-56 mounting holes & flex cable
5. Typical Applications• Industrial machine-health & predictive maintenance• Motor, pump, fan & compressor vibration monitoring• Structural condition monitoring (bridges, wind turbines)• Transportation/shock logging• Safety shut-off & alarm systems
6. Quick Start PerformanceParameter (typ @ 25 °C, 3.3 V) ................................ ValueMeasurement range ............................................... ±18 g (physical), 1-20 g digital rangesNoise density ....................................................... 0.248 mg/√Hz (10 Hz-1 kHz)Output noise (20 kSPS, 5 kHz BW) ................................. 12 mg rmsNon-linearity ....................................................... ±0.2 % FSCross-axis sensitivity ............................................... 2.6 %Offset temp-co ....................................................... 2 mg/°CBandwidth flatness (CAL_ENABLE=1) ................................. 5 kHz ±5 %FFT resolution (20 kSPS, no decimation) ............................. 40 Hz/binAlarm repeatability .................................................. 1 LSB
7. Pin Description (flex cable, bottom contact)Pin 1, 2 ........ VDD ................ 3.0 – 3.6 V supplyPin 3, 4, 5, 8 .. GND ............... 0 VPin 6, 9 ........ DNC ............... Do not connectPin 7 ........... DIO2 .............. Digital I/O #2 (alarm / trigger / GPIO)Pin 10 .......... RST ............... Active-low reset (≥15 µs pulse)Pin 11 .......... DIN ............... SPI data input (SDI)Pin 12 .......... DOUT .............. SPI data output (SDO, tri-state when CS high)Pin 13 .......... SCLK .............. SPI serial clock (≤2.5 MHz, Mode-3)Pin 14 .......... CS ................ SPI chip-select (active low)Pin 15 .......... DIO1 .............. Digital I/O #1 (factory = busy indicator)
8. Absolute Maximum RatingsAcceleration (powered/un-powered) ............................... 2000 g any axisVDD ................................................................. –0.3 V to +6 VDigital I/O ........................................................... –0.3 V to +5.3 VOperating temperature ............................................... –40 °C to +125 °CStorage temperature ................................................. –65 °C to +150 °CESD HBM ............................................................. 2 kV
9. Supply & Current ModesMode ................................................................. Current (typ) ........ Wake-up timeActive recording ...................................................... 40 mA ............... —Sleep / idle .......................................................... 230 µA .............. 2.3 msPower-down (GLOB_CMD[1]) ............................................ 15 µA ................ 2.3 msStart-up from power-on ............................................... — ................... 202 msReset recovery ........................................................ — ................... 54 ms
10. Signal Processing ChainMEMS → Anti-alias → 20.48 kSPS ADC → Decimation filter (÷2^n, n=0…10) → 512-sample buffer → Window (rect./Hanning/flat-top) → 512-pt real FFT → Magnitude → Averaging (1-255) → Flash record / alarm engine → SPI output
11. User Interface & SPI• 16-bit commands, full-duplex, Mode-3 (CPOL=1, CPHA=1)• Max clock 2.5 MHz; stall-time ≥16.5 µs between 16-bit transfers• Dual-memory structure: volatile SRAM for operation, flash for non-volatile backup of user settings• Factory flash restore: GLOB_CMD[3]=1
12. Alarm & GPIO Functions• Six spectral bands per axis, each with lower/upper frequency bins & two thresholds (warning/fault)• Response delay 0-15 records to reduce false trips• DIO pins can drive host interrupt (busy, alarm1, alarm2) or accept trigger input• System alarm selectable on temperature or VDD
13. Physical & MountingPackage style ......................................................... 15-lead aluminium module with integrated flex cableSize .................................................................. 15 mm × 24 mm × 15 mmMass .................................................................. ≈6 gMounting .............................................................. 4 × Ø2.65 mm clearance holes on 20 mm BSC grid (M2 or 2-56)Connector ............................................................. 15-position 0.50 mm pitch flex cable, 8.2 mm longMating connector ...................................................... AVX 04-6288-015-000-846 (slider lock)
14. Evaluation & Tools• ADIS16ACL1/PCBZ breakout board (2 mm pitch IDC header, LED pads, 4-40 mounting holes)• EVAL-ADIS2 USB evaluation system with PC GUI (FFT, waterfall, alarm setup, data export)
15. Ordering InformationModel ................................................................. Temperature Range .............. PackageADIS16228CMLZ ....................................................... –40 °C to +125 °C ............... ML-15-1 module with flex cable
16. Regulatory / Reliability• RoHS-compliant, Pb-free• Flash endurance 10 k cycles, 20-year retention @ 85 °C junction• Shock 2000 g survival, vibration 35 g rms (5-500 Hz) per MIL-STD-810G