Meggitt Endevco® Model 12M1A Low-Cost OEM Piezoelectric Accelerometer - OEM0 pages

Model 12M1A
Piezoelectric accelerometer - OEM
Features
Description
• Low cost/OEM applications
• High output efficiency
• Light weight (120 mg)
• For SMT installation
The Endevco model 12M1A Picochip™ is a high performance
piezoelectric accelerometer packaged as a surface mount
chip component. The unit is engineered for integration in
standard hybrid or SMT electronics packages along with
custom designed signal conditioning circuits, allowing
the user to create miniaturized shock and vibration
measurement systems in one completely integrated package.
The model 12M1A features Endevco’s Piezite type P-8
bimorph sensing element, operating in the bender mode,
which provides low base strain sensitivity, low pyroelectric
output, and extremely high charge output versus size.
Contact to the sensing element is made through two thick
film gold metalized mounting pads on the bottom surface of
the alumina case. The unit is designed to be mounted with
conductive adhesives or solder. Since the model 12M1A is a
high impedance piezoelectric device, extreme care must be
exercised in shielding it from stray electromagnetic noise.
TYPICAL AMPLITUDE RESPONSE
0.180 ±0.005
30
25
20
15
10
% DEVIATION
0.150 ±0.005
5
0
-5
-10
-15
0.055 ±0.010
-20
-25
(-)
a
1
(+)
10
100
-30
10000
100
0
FREQUENCY IN HERTZ
TYPICAL TEMPERATURE RESPONSE
(-)
40
(+)
.080
.040
20
% D EVI O N
ATI
.080
.040
30
CAPACITANCE
mounting surface
10
CHARGE SENSITIVITY
0
-10
-20
All dimensions are in inches
Shaded areas denote gold metallization
(+) and (-) indicates output polarity for an acceleration indicated by the bold arrow
-100
(-73)
0
(-18)
100
(38)
TEMPERATURE
200
(93)
°F (
°C)
-30
300
(149)