3255A Series Accelerometer

Description: The Model 3255A is a signal conditioned board mountable MEMS accelerometer available in ±25g to ±500g ranges. The package can be mounted in one of two orientations, allowing the measurement axis to be either parallel or perpendicular to the mounting surface without the use of costly brackets. The accelerometer incorporates integral temperature compensation from -40°C to 100°C and offers a flat frequency response from DC to 1500Hz.

Features:

• PC Board Mountable Accelerometer
• Amplified Output
• ±25g to ±500g Dynamic Range
• Temperature Compensated
• Hermetically Sealed
• -40° to 100°C Operating Range
• 5Vdc Excitation
• DC Response, Gas Damping

Parameters

DYNAMIC                                               Notes
Range (g): ±25 ±50 ±100 ±250 ±500
Sensitivity (mV/g): ±10% 80.0 40.0 20.0 8.0 4.0 @5Vdc Excitation1

Frequency Response (Hz): 0-800 0-1000 0-1200 0-1500 0-1500 ±5%
Natural Frequency (Hz): 4000 4000 6000 8000 10000
Non-Linearity (%FSO): ±0.5 ±0.5 ±0.5 ±0.5 ±0.5
Transverse Sensitivity (%): <3 <3 <3 <3 <3 <1 Typical
Damping Ratio: 0.7 0.7 0.7 0.6 0.5 Typical
Shock Limit (g): 5000 5000 5000 5000 5000

ELECTRICAL
Zero Acceleration Output (V): 2.5±0.10 2.5±0.10 2.5±0.10 2.5±0.10 2.5±0.10 Single-Ended
Excitation Voltage (Vdc)1: 2.7 to 5.5 2.7 to 5.5 2.7 to 5.5 2.7 to 5.5 2.7 to 5.5
Excitation Current (mA): <5 <5 <5 <5 <5
Bias Voltage (Vdc): 2.5 2.5 2.5 2.5 2.5
Full Scale Output Voltage (Vdc): ±2.0 ±2.0 ±2.0 ±2.0 ±2.0
Output Impedance (Ω): <100 <100 <100 <100 <100
Insulation Resistance (MΩ): >100 >100 >100 >100 >100 @100Vdc
Residual Noise (µV RMS): 800 400 400 400 400 Passband
Ground Isolation: Isolated from Mounting Surface

ENVIRONMENTAL
Thermal Zero Shift (%FSO/°C): ±0.018 ±0.018 ±0.018 ±0.018 ±0.018
Thermal Sensitivity Shift (%/°C): ±0.021 ±0.021 ±0.021 ±0.021 ±0.021
Operating Temperature (°C): -54 to 121
Compensated Temperature (°C): -20 to 85
Storage Temperature (°C): -54 to 121

PHYSICAL
Case Material: Ceramic
Weight (grams): 1.5
Mounting: Solder

1Output is ratiometric with excitation voltage.
2Do not electrically connect undesignated pads in sensor application. Except pad 5 may be tied to pad 4 without affecting performance.
3Maximum ratings without damage:
– Excitation voltage: 5.5Vdc
– ESD protection: 4kV
– Solder reflow temperature: 260°C (10 seconds)
4Adhesive underfill suggested for high-g applications.

Calibration supplied: CS-SENS-0100 NIST Traceable Amplitude Calibration at 100Hz