0-1003800-5 Measurement Specialties Inc/Schaevitz, 0-1003800-5 Datasheet - Page 8

• Manufacturer Part Number: 0-1003800-5
• Description: SENSOR ACCELEROMETER 3-AXIS SMD
• Manufacturer: Measurement Specialties Inc/Schaevitz

Specifications of 0-1003800-5

• Rohs Status: RoHS non-compliant
• Axis: X, Y, Z
• Acceleration Range: ±250g
• Sensitivity: 1.8mV/g
• Output Type: Analog
• Interface: Parallel
• Mounting Type: Surface Mount
• Package / Case: Surface Mount
• Voltage - Supply: -
• Bandwidth: -
• Other names: ACH-04-08-05; MSP1004

Accelerometer ACH-04-08-05
114-27002
simple method is to use linear temperature coefficient resistors in the feedback network of the operational amplifier
used to condition the accelerometer’s signal. KOA Speer Electronics, Inc.® (Bradford, PA) manufactures a variety of
o
these resistors (LT73 and MLT product family). Using a -2800ppm/
C temperature compensating resistor yields a
o
o
o
o
sensitivity variation of ±4% from -40
C to +85
C. From 0
C to +70
C, a variation of only ±2% is obtained using a
o
-3300ppm/
C resistor. Note that since the resistors have negative temperature coefficients, they need to be placed
in the circuit such that the gain increases with increasing temperature.
3.4 Temperature Transient Sensitivity
Because of the its very low operating frequency, the ACH-04-08-05 exhibits high Temperature Transient Sensitivity
(TTS). TTS is defined as the accelerometer’s output response to RAPID temperature changes and is expressed in
equivalent g’s per degree C. This effect should not be confused with the ACH-04-08-05's sensitivity shift versus
temperature which is defined at static (unchanging) temperatures and is unrelated to TTS (see above). The ACH-
04-08-05's TTS will manifest itself as a low frequency (“DC”) drift when the device is subjected to temperature
gradients. Even small temperature changes can produce significant DC drift.
TTS results primarily from differences in the thermal coefficients of expansion (TCE) of the various materials in the
accelerometer. During product development, every effort is made to match TCE’s, however, many mismatches are
unavoidable. Even small TCE mismatches can lead to high TTS when combined with low frequency measurement
capability since TTS is primarily a low frequency phenomena.
Fortunately, it is easy to minimize TTS effects. The key is to prevent air currents, which are at various temperatures,
from circulating around the ACH-04-08-05. These “wind currents” can be minimized by encasing the accelerometer
in a shell. The shell can be made of almost anything. Successful TTS minimization shells have been made from
Rev A
Measurement Specialties Incorporated, Norristown, PA 19403 610-650-1500
8 of 10
Printed in U.S.A. For drawings, technical data or samples, contact call 610-650-1500.
Specifications subject to change. Consult MSI for latest specifications.