Order this document by MMAS40GWB/D SEMICONDUCTOR TECHNICAL DATA ±40g Amplified MICROMACHINED ACCELEROMETER ± 40g AMPLIFIED (Wingback) 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. 12 3 4 5 6 WB PACKAGE CASE 456–03 Features • Minimum Full Scale Measurement ± 40g • Calibrated, True Self–Test • Senses Parallel to the Printed Circuit Board PIN NUMBER (WB) • Integral Signal Conditioning and 4–Pole Filter 1 NC (1) 4 • Linear Output 2 Self–Test 5 Vref (2) GND 3 Output 6 VS (2) • Robust, High Shock Survivability NOTES: 1. Connect to ground. 2. Bypass at pin to ground with 0.1 µF ceramic capacitor for specified performance. SIMPLIFIED BLOCK DIAGRAM + 2 + 6 SELF–TEST VS + g A G–CELL 4 LOW–PASS FILTER TEMPERATURE COMPENSATION 5 3 Vref OUTPUT GND (Replaces XMMAS40GWB) Sensor Motorola Motorola, Inc. 1997 Device Data 1 MMAS40GWB MAXIMUM RATINGS Symbol Value Unit Acceleration (biased each axis) Rating G ± 500 g Acceleration (unbiased each axis) G ± 2000 g VSmax –0.3 to +7.0 Vdc Tstg – 40 to +105 °C TA – 40 to +85 °C Supply Voltage Storage Temperature Operating Temperature(6) 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 VS 4.75 5.0 5.25 V Supply Current IO — 5.0 7.0 mA Full Scale Output Range VFSO 0.3 — VS – 0.3 V Sensitivity (over temperature range) (2) (3) ∆V/∆G 36 40 44 mV/g Voff 2.2 2.5 2.8 V Linearity — — 0.5 2.0 %FSO Transverse Sensitivity — — 1.0 3.0 %FSO Frequency Bandwidth — 300 400 500 Hz Zero Acceleration Output (over temperature range) (3) (4) Noise — — 15 25 mVpk Self–Test Output Equivalent (5) GS 20 25 30 g Self–Test Input Low VSTL — — 1.6 V Self–Test Input High VSTH 3.4 — — V — 10 70 200 µA Self–Test Input Current 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 MMAS40GWB 2 Temperature Range Case No. Package –40 to +85°C 456–03 Plastic Wingback Motorola Sensor Device Data MMAS40GWB POSITIVE ACCELERATION SENSING DIRECTION 12 7 1 6 * Earth’s Surface WINGBACK PACKAGE * When positioned as shown, the earth’s gravity will result in a positive 1g output WINGBACK PACKAGE DRILLING PATTERN .000 .100 .200 .300 .400 .500 0.088 0.588 ∅ .045 2X .095 2X .000 .13 ∅ .030 6X PIN 1 .627 Motorola Sensor Device Data Measurement in inches 3 MMAS40GWB PACKAGE DIMENSIONS –A– NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. C 12 7 –B– 1 6 L K H M D 0.13 (0.005) G M J 6 PL T A M B M S N DIM A B C D E F G H J K L M N P S INCHES MIN MAX 0.618 0.638 0.250 0.270 0.130 0.135 0.015 0.021 0.328 0.368 0.112 0.120 0.100 BSC 0.050 BSC 0.009 0.012 0.125 0.140 0.063 0.070 0.015 0.025 0.036 0.044 0.110 0.120 0.025 0.035 MILLIMETERS MIN MAX 15.70 16.21 6.35 6.86 3.30 3.43 0.38 0.53 8.33 9.35 2.84 3.05 2.54 BSC 1.27 BSC 0.23 0.30 3.18 3.56 1.60 1.78 0.38 0.64 0.91 1.12 2.79 3.05 0.64 0.89 P E F –T– CASE 456–03 ISSUE D WB PACKAGE Motorola reserves the right to make changes without further notice to any products herein. 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