MMAS40GWB 40g AMPLIFIED Datasheet

MMAS40GWB Datasheet, PDF, Equivalent


Part Number

MMAS40GWB

Description

MICROMACHINED ACCELEROMETER 40g AMPLIFIED

Manufacture

Motorola

Total Page 4 Pages
Datasheet
Download MMAS40GWB Datasheet


MMAS40GWB
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document
by MMAS40GWB/D
Micromachined Accelerometer
±40g Amplified
The MMAS40G family of silicon capacitive, micro–machined accelerometers
features integral signal amplification, signal conditioning, a 4–pole low–pass
filter and temperature compensation. Zero–G offset, full scale span and filter
roll–off are factory set and require no external passives. A calibrated self–test
feature mechanically displaces the seismic mass with the application of a digital
self–test signal.
The MMAS40G incorporates a single polysilicon seismic mass, suspended
between two fixed polysilicon plates (G–cell). The forces of acceleration move
the seismic mass, thereby resulting in a change in capacitance. The G–cell is
sealed at the wafer level, creating a particle–free environment. The G–cell
features built–in damping and over–range stops to protect it from mechanical
shock.
MMAS40G accelerometers are ideally suited for automotive crash detection
and recording, vibration monitoring, automotive suspension control, appliance
control systems, etc.
Features
Minimum Full Scale Measurement ± 40g
Calibrated, True Self–Test
Senses Parallel to the Printed Circuit Board
Integral Signal Conditioning and 4–Pole Filter
Linear Output
Robust, High Shock Survivability
SIMPLIFIED BLOCK DIAGRAM
++
2 SELF–TEST
6 VS
+
MMAS40GWB
MICROMACHINED
ACCELEROMETER
± 40g AMPLIFIED
(Wingback)
12 3 4 5 6
WB PACKAGE
CASE 456–03
PIN NUMBER (WB)
1 NC (1)
2 Self–Test
4 Vref (2)
5 GND
3 Output
6 VS (2)
NOTES:
1. Connect to ground.
2. Bypass at pin to ground with 0.1 µF
ceramic capacitor for specified perfor-
mance.
g G–CELL
A
4 Vref
LOW–PASS FILTER
TEMPERATURE
COMPENSATION
3 OUTPUT
5 GND
(Replaces XMMAS40GWB)
©MMoottoororolal,aInSc.e1n9s97or Device Data
1

MMAS40GWB
MMAS40GWB
MAXIMUM RATINGS
Rating
Acceleration (biased each axis)
Acceleration (unbiased each axis)
Supply Voltage
Storage Temperature
Operating Temperature(6)
Symbol
G
G
VSmax
Tstg
TA
Value
± 500
± 2000
–0.3 to +7.0
– 40 to +105
– 40 to +85
Unit
g
g
Vdc
°C
°C
OPERATING CHARACTERISTICS (VS = 5.0 Vdc, TA = 25°C unless otherwise noted)
Characteristic
Symbol Min Typ Max Unit
Acceleration Range
G
±40 ±55
g
Output Drive Capability
– 0.2
0.2 mA
Supply Voltage
Supply Current
Full Scale Output Range
Sensitivity (over temperature range) (2) (3)
VS
4.75 5.0 5.25
V
IO — 5.0 7.0 mA
VFSO 0.3 — VS – 0.3 V
V/G 36 40 44 mV/g
Zero Acceleration Output (over temperature range) (3) (4)
Linearity
Voff
2.2 2.5 2.8
V
— — 0.5 2.0 %FSO
Transverse Sensitivity
— — 1.0 3.0 %FSO
Frequency Bandwidth
300 400 500
Hz
Noise
Self–Test Output Equivalent (5)
Self–Test Input Low
Self–Test Input High
Self–Test Input Current
— — 15 25 mVpk
GS 20 25 30 g
VSTL — — 1.6 V
VSTH 3.4 — — V
— 10 70 200 µA
NOTES:
1. The output voltage increases from the Zero Acceleration Output for positive acceleration and decreases for negative acceleration. The
typical sensitivity is 40 mV/g. For example, with VS = 5.0 V, a + 20g input will result in a 3.3 V output. (Voutput = 2.5 + 0.040 x 20) and a – 20g
input will result in a 1.7 V output.
2. Sensitivity is a ratiometric parameter: V/G(Vs) = V/G(5 V) x (VS / 5 V).
3. The compensated temperature operating range is – 40 to +85°C.
4. Zero Acceleration Output is a ratiometric parameter: Voff(Vs) = Voff(5 V) x (VS / 5 V).
5. Equivalent output in response to a Logic Level One on the self–test pin.
6. Additional temperature range available. Consult factory.
ORDERING INFORMATION
Device
Temperature Range
MMAS40GWB
–40 to +85°C
Case No.
456–03
Package
Plastic Wingback
2 Motorola Sensor Device Data


Features MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MMAS40GWB/D Mic romachined Accelerometer ± 40g Amplifi ed The MMAS40G family of silicon capaci tive, micro–machined accelerometers f eatures integral signal amplification, signal conditioning, a 4–pole low–p ass filter and temperature compensation . Zero–G offset, full scale span and filter roll–off are factory set and r equire no external passives. A calibrat ed self–test feature mechanically dis places the seismic mass with the applic ation of a digital self–test signal. The MMAS40G incorporates a single polys ilicon seismic mass, suspended between two fixed polysilicon plates (G–cell) . The forces of acceleration move the s eismic mass, thereby resulting in a cha nge in capacitance. The G–cell is sea led at the wafer level, creating a part icle–free environment. The G–cell f eatures built–in damping and over–r ange stops to protect it from mechanica l shock. MMAS40G accelerometers are ideally suited for automotive crash detection and reco.
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