3255-025

3255-025 Datasheet

Model 3255

Part	Datasheet
3255-025	3255-025 (pdf)

Related Parts	Information
3255-100	3255-100
3255-050	3255-050

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Model 3255 PC Board Mountable Accelerometer to VDC Output Integral Temperature Compensated Low Cost Frontal Impact Air Bag Systems Side Impact Air Bag Systems Vibration/Shock Monitoring Crash Recorder Aerospace Surface Mount Package Non-linearity Typical Self Test Function Dc Response Built-in Damping Built-in Overrange Stops STANDARD RANGES Range ±25 ±50 ±100 ±250 ±500 The Model 3255 is a two-chip accelerometer designed for low cost surface mount applications. 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. This accelerometer consists of a micro machined silicon mass suspended by multiple beams from a silicon frame. Piezoresistors located in the beams change their resistance as the motion of the suspended mass changes the strain in the beams. Silicon caps on the top and bottom of the device are added to provide over-range stops. This design provides for a very low profile, high shock resistance, durability and built-in damping over a wide usable bandwidth. Each sensor is individually serialized. A patented self-test feature is also built into the sensor. By applying a voltage to the self-test pin, an electrostatic force is created that attracts the seismic mass towards the top cap, simulating an acceleration and allowing proper sensor function to be verified. DIMENSIONS Accelerometer Amplified PC Board Mountable Accelerometer Model 3255 PERFORMANCE SPECIFICATIONS Supply Current VDC Ambient Temperature 25°C Unless otherwise specified PARAMETERS Bandwidth MIN Sensitivity MIN / TYP/ MAX ±25G 0-1000 RANGE ±50G 0-1000 ±100G 0-1500 UNITS Hz mV/g NOTES 8 PARAMETERS Bandwidth MIN Sensitivity MIN / TYP/ MAX ±250G 0-2000 RANGE ±500G 0-2400 UNITS Hz mV/g NOTES 8 ALL RANGES PARAMETERS Zero Acceleration Output Non-Linearity Transverse Sensitivity Supply Voltage Supply Current Output Noise Self-Test Input Voltage Self-Test Response Vst = -5V Self-Test Input Current Vst = -5V Self-Test Accuracy Output Source Current load to ground Output Sink Current supply to load Acceleration Limits Operating Temperature Storage Temperature Weight -40°C to +85°C -40°C to +125°C Grams 2000 UNITS Volts ±% Span ±% Span Volts mA mV p-p Volts G mA % mA G NOTES 1, 4 2 ORDERING INFORMATION CONNECTIONS PAD 1 2 3 4 5 6 thru 11 FUNCTION Alarm Function Signal Output Ground +5V Supply Self Test No Electrical Connection Accelerometer Amplified Feel free to contact customer service with any questions at Toll free 1 800 745-8008 Phone 757 766-1500 Fax 757 766-4297 June 2001

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Model 3255

PC Board Mountable Accelerometer to VDC Output Integral Temperature Compensated Low Cost

Frontal Impact Air Bag Systems Side Impact Air Bag Systems Vibration/Shock Monitoring Crash Recorder Aerospace

Surface Mount Package Non-linearity Typical Self Test Function Dc Response Built-in Damping Built-in Overrange Stops

STANDARD RANGES

Range
±25
±50
±100
±250
±500

The Model 3255 is a two-chip accelerometer designed for low cost surface mount applications. 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.

This accelerometer consists of a micro machined silicon mass suspended by multiple beams from a silicon frame. Piezoresistors located in the beams change their resistance as the motion of the suspended mass changes the strain in the beams. Silicon caps on the top and bottom of the device are added to provide over-range stops. This design provides for a very low profile, high shock resistance, durability and built-in damping over a wide usable bandwidth. Each sensor is individually serialized.

A patented self-test feature is also built into the sensor. By applying a voltage to the self-test pin, an electrostatic force is created that attracts the seismic mass towards the top cap, simulating an acceleration and allowing proper sensor function to be verified.

DIMENSIONS

Accelerometer Amplified

PC Board Mountable Accelerometer

Model 3255

PERFORMANCE SPECIFICATIONS

Supply Current VDC Ambient Temperature 25°C Unless otherwise specified

PARAMETERS Bandwidth MIN Sensitivity MIN / TYP/ MAX
±25G 0-1000

RANGE ±50G 0-1000
±100G 0-1500

UNITS Hz
mV/g

NOTES 8

PARAMETERS Bandwidth MIN Sensitivity MIN / TYP/ MAX
±250G 0-2000

RANGE
±500G 0-2400

UNITS Hz
mV/g

NOTES 8

ALL RANGES

PARAMETERS Zero Acceleration Output Non-Linearity Transverse Sensitivity Supply Voltage Supply Current Output Noise Self-Test Input Voltage Self-Test Response Vst = -5V Self-Test Input Current Vst = -5V Self-Test Accuracy Output Source Current load to ground Output Sink Current supply to load Acceleration Limits Operating Temperature Storage Temperature Weight
-40°C to +85°C -40°C to +125°C Grams
2000

UNITS Volts ±% Span ±% Span Volts mA mV p-p Volts

G mA % mA G

NOTES 1, 4 2
ORDERING INFORMATION

CONNECTIONS

PAD 1 2 3 4 5
6 thru 11

FUNCTION Alarm Function Signal Output Ground +5V Supply Self Test No Electrical Connection

Accelerometer Amplified

Feel free to contact customer service with any questions at Toll free 1 800 745-8008 Phone 757 766-1500 Fax 757 766-4297

June 2001

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived 3255-025 Datasheet file may be downloaded here without warranties.

Datasheet ID: 3255-025 647601