HIGH-PERFORMANCE MODELS 2220 AND 2276
PREMIUM 1-AXIS DC ACCELEROMETERS•••••••••••

Low Noise: 10 μg√ Hz Typical for ±2g Full Scale Versions-55 to +125°C Operating Temperature Range
Flexible +8 to +32 VDC Power
Excellent Long-Term Stability±4V Differential Output or 0.5V to 4.5V Single Ended Output
Responds to Frequencies from Zero (DC) to 2000+ Hz
Low Impedance Outputs Support up to 2000 Feet of Cable
Integrated Cable or Connector, Traditional 1” & Small Footprint Sizes
Simple Four (4) Wire Connection
Rugged Anodized Aluminum Case
Fully Calibrated and Serialized for Traceability

AVAILABLE G-RANGESFULL SCALE
ACCELERATION±2g±5g± 10 g± 25 g± 50 g± 100 g± 200 g± 400 g

MODELSUFFIX-002-005-010-025-050-100-200-400

PREMIUM HIGH-PERFORMANCE ACCELEROMETER MODELS 2220 AND 2276
SDI’s Premium Models 2220 and 2276 High-Performance Single Axis MEMS DC
Accelerometers are rugged plug-and-play measurement devices suitable for a widearray of demanding applications. Both models provide enhanced performance overtemperature for use in zero to medium frequency applications experiencing large
or rapid temperature variations or maintaining hot or cold extremes for extended
periods of time.
The 2220 comes in a traditional 1-inch square package with an integrated cable and is operationallyidentical to the 2276, the small footprint device designed for tight spaces. The 2220 and 2276 featurea hermetically sealed, low noise SDI Model 1522 surface mount accelerometer, which is individuallytested, programmed, calibrated and verified in a climate chamber to ensure the greatest accuracy
in thermally volatile conditions. The 2220 and 2276 include initial calibration reports.
Onboard voltage regulation and an internal voltage reference eliminate the need for precision power supplies. Therobust, anodized aluminum case is potted then epoxy sealed and can be mounted easily via two screws, an adhesive,
or by attaching a magnet.

ZERO (DC) TO MEDIUM FREQUENCY APPLICATIONSPERFORMANCE BY G RANGE
INPUT
RANGE

SENSITIVITY,DIFFERENTIAL

g±2±5±10±25±50±100±200±400*FREQUENCYRESPONSE(TYPICAL, 5%)mV/g
Hz20000 – 250
8000 – 400
4000 – 700
1600 – 1300800 – 1600
400 – 1700
200 – 1900
100 – 2000
By Model: VDD=VR=5.0 VDC, TC=25°C
*FREQUENCYRESPONSE(TYPICAL, 3 DB)

Hz0 – 525
0 – 800
0 – 1100
0 – 1750
0 – 2100
0 – 30000 – 3600
0 – 4200*FREQUENCYRESPONSE(MINIMUM, 3 DB)

OUTPUT NOISE,DIFFERENTIAL(RMS, TYPICAL)MAX.
MECHANICALSHOCK (0.1 MS)

Hzμg/(root Hz)
g (peak)0 – 300
1020000 – 420
150 – 660
230 – 1050
380 – 1400
60
5000
0 – 1700
1210 – 2100
243
0 – 2400475
Single ended sensitivity is half of values shown.

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Silicon Designs, Inc. • 13905 NE 128th Street, Kirkland WA 98034 • Phone: 425-391-8329 • Fax: 425-391-0446
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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERSPERFORMANCE - ALL VERSIONSAll Models: Unless otherwise specified, Vs=+8 to +32 VDC, TC=25°C, Differential Mode. Span = ±g range = 8000 mV.
PARAMETERMIN
TYPMAXUNITS
Bias Calibration Error (%)
0.250.6± % of span
Bias Calibration Error (mV)2048± mV
Scale Factor Calibration Error 10.5
1.25±%
Non-Linearity (-90 to +90% of span) 10.150.5± % of span
Bias Temperature Shift (Coefficient)-1000+100(PPM of span)/°C
Scale Factor Temperature Shift (Coefficient)-1500+50PPM/°C
Cross Axis Sensitivity
23±%
Power Supply Rejection Ratio
50>65dB
Output Impedance1Ω
Output Common Mode Voltage
2.5VDCOperating Voltage
832VDCOperating Current (AOP & AON open)
710.5mA DC
Operating Temperature-55+125°C
Mass 2220 / 2276 (not including cable)
10 / 9grams
Cable Mass (10’ integrated cable, 2220)
4.25
grams/footNote 1: For 2g thru 50g only; 100g and greater versions are tested and specified from -65 to +65g.
NOTICE: Stresses greater than those listed may cause permanent damage to the device. These are maximum stress ratings
only. Functional operation of the device at or above these conditions is not implied.

BIAS & SCALE FACTOR TEMPERATURE SHIFT EXPLAINEDEvery accelerometer has a bias and scale factor temperature coefficient, meaning the output shifts slightly due totemperature changes. Many applications operate within a relatively small temperature band or at room
temperature, and therefore rarely encounter interference from the bias or scale factor temperature shifts. Thesecustomers are ideal candidates for SDI’s Low-Cost accelerometer modules (2210, 2260, 2266).
For applications experiencing larger temperature variations (i.e. exposure to engine temperatures or arctic testing)
SDI suggests the upgraded Premium High-Performance accelerometer modules (2220, 2276). These haveenhanced, temperature compensated, proprietary SDI Model 1522 accelerometer chips, which are individuallytested, calibrated and verified in a climate chamber to provide the most accuracy and include a calibration report.
The accelerometer output with no acceleration present. For SDI’s differential output analog
Bias
accelerometers, it is a signed quantity that is expressed in terms of either g or output volts and isideally equal to zero g or zero volts.
The ratio of the change in output to a unit change in the input acceleration expressed in millivolts perg (mV/g). Since the output of most accelerometers is slightly non-linear, the scale factor value is
Scale Factor
defined as the slope of the least-squares-fit line to the acceleration input vs output curve. SDI
measures over the range of -90% to +90% of full scale or from -65g to +65g, whichever is smaller.
The amount of bias shift to expect with a change in temperature expressed as PPM of span per °C.
BiasFor example, the percent of span bias shift that would occur for a 25g full scale device with a ±200
Temperature
PPM of span per °C rating and a 55 °C rise from room temperature would be: ±200 / 1,000,000 x (80CShift- 25C) x 100% of span = ±1.1% of span. The g shift would be ±1.1% of 50g = ±0.55 g. This error in terms(Coefficient)of output voltage for a 25 g analog accelerometer would be ±1.1% of span = ±1.1% of 8 V = 88 mV.
The amount of scale factor shift to expect with a change in temperature expressed as PPM per °C.
Scale Factor
For example, the percent shift in scale factor that would occur for a device with a +200 PPM per °C
Temperature
rating and a 60 °C rise from room temperature would be: +200 / 1,000,000 x (85C - 25C) x 100% =Shift+1.2%. For an analog 10g device, the scale factor would rise from its nominal (8 V)/(20 g) = 400 mV/g(Coefficient)
at +25C to 400 mV/g +1.2% = 404.8 mV/g.

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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERSOPERATION
SDI Models 2220 and 2276 MEMS DC Accelerometers provide optimal performance when they are connected toinstrumentation in a differential configuration using both the AOP and AON output signals, but they also support
single ended operation for complete flexibility.
These Accelerometers produce a differential analog output voltage pair (AON & AOP), which varies withacceleration. The signal outputs are fully differential about a common mode voltage of approximately 2.5 volts. At
zero acceleration, the output differential voltage is nominally 0 volts DC; at ±full scale acceleration, the output is ±4volts DC, respectively, as shown in the figure (below). The output scale factor is independent from the supply voltageof +8 to +32 volts.
When a differential connection is not possible, connect the accelerometer to instrumentation in single ended modeby connecting AOP and GND to the instrumentation and leaving AON disconnected. Keep in mind that the signal tonoise ratio is reduced by half for a single-ended vs. a differential connection.

CABLE SPECIFICATIONS
2220: The standard 10’ (approx. 3 meters) integrated cable consists of four 28 AWG (7x36) tin-plated copper wireswith Teflon FEP insulation surrounded by a 40 AWG tin plated copper braided shield. The shield jacket is Teflon
FEP with a nominal outer diameter of 0.096”. The cable’s braided shield is electrically connected to the case. Theblack ground (GND) wire is isolated from the case.
2276: The case’s integrated connector
shell, pins and sockets are gold platedbrass. The 4PIN-CAB cable consists offour 30 AWG (7x38) silver-plated copperwires with PTFE insulation surrounded bya braided shield. The black FEP shieldjacket has a nominal outer diameter of0.100”.
The 4PIN-CAB is available in fivestandard lengths, and custom lengths
may be available for special order.
Both cable styles
end in a 4-wirepigtail.

NAME
4PIN-CAB-04
4PIN-CAB-10
4PIN-CAB-20
4PIN-CAB-33
4PIN-CAB-50

LENGTH - FEET
4 Feet10 Feet20 Feet33 Feet50 FeetLENGTH - METERS (APPROXIMATE)
1.2 Meters
3.0 Meters
6.0 Meters
10 Meters
15.4 Meters

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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERS
CABLE LENGTH CONSIDERATIONS
Cable lengths of up to 50 feet (15 meters) can be used without the need to test for output instability. For cable
lengths exceeding 50 feet, SD recommends checking each individual installation for oscillation by tapping theaccelerometer and watching the differential output for oscillation in the 20 kHz to 50 kHz region. If no oscillation ispresent, extended cable length should behave as expected. From the standpoint of output current drive and slew
rate limitations, all SDI 8-32 VDC Accelerometers are capable of driving over 2000 feet (600 meters) of cable.
However, at some length ranging between 50 feet and 2000 feet, each device will likely begin to exhibit oscillation.

RECOMMENDED CONNECTIONS - DIFFERENTIAL
SDI Models 2220 and 2276 MEMS DC Accelerometers provide optimal performance when they are connected to
instrumentation in a differential configuration using both the AOP and AON output signals.

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Silicon Designs, Inc. • 13905 NE 128th Street, Kirkland WA 98034 • Phone: 425-391-8329 • Fax: 425-391-0446
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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERS
RECOMMENDED CONNECTIONS – SINGLE ENDED
Single ended operation is also possible with minor changes to the wiring configuration, as described below.

OPTIONAL ACCESSORIESModel 2230 Triaxial Mounting Block• Anodized 6061-T6
aluminum 1.25"
cube• Mix and Match glevels for custom
combinations

Model 2232 Magnetic Mount• 10 lbs / 4.6 KG pull force• Rated for use up to ±50G
• Low mass: 23 grams

Model 2235 Stud Mount Adaptor Block• Stud mount Adaptor for any SDI
module• Anodized 6061-T6
aluminum block• 6.2 grams, 0.7” x 1”
footprint

COMPARABLE 3-AXIS MODELS
SDI’s high-performance, single axis accelerometers are also built in three-axis
configurations for multi-dimensional sensing in one package with only a single excitation
connection. The high-performance SDI Models 2470 and 2476 are the three axis versions ofthe 2220 and 2276 with similarly upgraded SDI Model 1522 surface mount accelerometers,
improved bias and scale factor temperature shift performance, andinclude an initial calibration certificate.
The 2470 includes a 3-foot integrated cable and is operationally identical to the 2476, whichfeatures a connector for easily customized cable lengths and positions. SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Silicon Designs, Inc. • 13905 NE 128th Street, Kirkland WA 98034 • Phone: 425-391-8329 • Fax: 425-391-0446
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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERSPACKAGE DIMENSIONS

2220
Module Mass: 10 grams
Cable Mass: 4.25 grams/foot

NOTE: The SDI Model 2220’s case was updated as of December 1, 2021.
No performance specifications were changed.
Contact SDI for previous versions of this data sheet.

2276
Module Mass: 9 grams

0.63 [16.0]
0.48 [12.2]
0.315 [8.0]

INCH [mm]
0.12
[3.0]
9'&;;;;;

Serial #0.59[15.0]

SD I
0.94[23.9]

    

0.40 [10.16]

0.33 [8.4]
GRN

PositiveAcceleration

BLK= Location ofSense Element

WHT

0.425 [10.8]
REDNote: Connector index may not be positioned as drawn

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERSCALIBRATION REPORT EXAMPLESLINEARITY, PHASE & FREQUENCY RESPONSE BY G-LEVEL
The included calibration reports provide additional information about the linearity, output, phase, and frequency
response as tested for each individual unit. The following are examples of the graphical data supplied on calibration
reports, by G-level.

EXAMPLE 2G

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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERS
EXAMPLE 5G

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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERS
EXAMPLE 10G

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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERS
EXAMPLE 25G

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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERS
EXAMPLE 50G

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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERS
EXAMPLE 100G

100g and greater versions are tested and specified from -65 to +65g.

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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERS
EXAMPLE 200G

100g and greater versions are tested and specified from -65 to +65g.

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PREMIUM 2220 AND 2276 1-AXIS ACCELEROMETERS
EXAMPLE 400G

100g and greater versions are tested and specified from -65 to +65g.

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8-Dec-2021