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MMA7261QT Dataheets PDF



Part Number MMA7261QT
Manufacturers Freescale Semiconductor
Logo Freescale Semiconductor
Description Three Axis Low-g Micromachined Accelerometer
Datasheet MMA7261QT DatasheetMMA7261QT Datasheet (PDF)

www.DataSheet4U.com Freescale Semiconductor Technical Data Document Number: MMA7261QT Rev 0, 10/2006 ±2.5g - 10g Three Axis Low-g Micromachined Accelerometer The MMA7261QT low cost capacitive micromachined accelerometer features signal conditioning, a 1-pole low pass filter, temperature compensation and g-Select which allows for the selection among 4 sensitivities. Zero-g offset full scale span and filter cut-off are factory set and require no external devices. Includes a Sleep Mode that make.

  MMA7261QT   MMA7261QT


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www.DataSheet4U.com Freescale Semiconductor Technical Data Document Number: MMA7261QT Rev 0, 10/2006 ±2.5g - 10g Three Axis Low-g Micromachined Accelerometer The MMA7261QT low cost capacitive micromachined accelerometer features signal conditioning, a 1-pole low pass filter, temperature compensation and g-Select which allows for the selection among 4 sensitivities. Zero-g offset full scale span and filter cut-off are factory set and require no external devices. Includes a Sleep Mode that makes it ideal for handheld battery powered electronics. Features • • • • • • • • • • • Selectable Sensitivity (2.5g/3.3g/6.7g/10g) Low Current Consumption: 500 µA Sleep Mode: 3 µA Low Voltage Operation: 2.2 V – 3.6 V 6mm x 6mm x 1.45mm QFN Fast Turn On Time High Sensitivity (2.5 g) Integral Signal Conditioning with Low Pass Filter Robust Design, High Shocks Survivability Environmentally Preferred Package Low Cost MMA7261QT MMA7261QT: XYZ AXIS ACCELEROMETER ± 2.5g/3.3g/6.7g/10g Bottom View Typical Applications • • • • • • • • HDD MP3 Player: Freefall Detection Laptop PC: Freefall Detection, Anti-Theft Cell Phone: Image Stability, Text Scroll, Motion Dialing, E-Compass Pedometer: Motion Sensing PDA: Text Scroll Navigation and Dead Reckoning: E-Compass Tilt Compensation Gaming: Tilt and Motion Sensing, Event Recorder Robotics: Motion Sensing ORDERING INFORMATION Device Name MMA7261QT MMA7261QR2 Temperature Range – 20 to +85°C – 20 to +85°C Package Drawing 1622-02 1622-02 Package QFN-16, Tray QFN-16,Tape & Reel g-Select1 1 g-Select2 2 VDD 3 VSS 4 16-LEAD QFN CASE 1622-02 Top View XOUT YOUT ZOUT N/C 16 15 14 13 12 Sleep Mode 11 N/C 10 N/C 9 N/C 5 N/C 6 N/C 7 N/C 8 N/C Figure 1. Pin Connections © Freescale Semiconductor, Inc., 2006. All rights reserved. VDD g-Select1 g-Select2 Oscillator Clock Generator X-Temp Comp XOUT Sleep Mode G-Cell Sensor C to V Converter Gain + Filter Y-Temp Comp YOUT Control Logic EEPROM Trim Circuits Z-Temp Comp ZOUT VSS Figure 2. Simplified Accelerometer Functional Block Diagram Table 1. Maximum Ratings (Maximum ratings are the limits to which the device can be exposed without causing permanent damage.) Rating Maximum Acceleration (all axis) Supply Voltage Drop Test(1) Storage Temperature Range 1. Dropped onto concrete surface from any axis. Symbol gmax VDD Ddrop Tstg Value ±2000 –0.3 to +3.6 1.8 –40 to +125 Unit g V m °C ELECTRO STATIC DISCHARGE (ESD) WARNING: This device is sensitive to electrostatic discharge. Although the Freescale accelerometer contains internal 2000 V ESD protection circuitry, extra precaution must be taken by the user to protect the chip from ESD. A charge of over 2000 volts can accumulate on the human body or associated test equipment. A charge of this magnitude can alter the performance or cause failure of the chip. When handling the accelerometer, proper ESD precautions should be followed to avoid exposing the device to discharges which may be detrimental to its performance. MMA7261QT 2 Sensors Freescale Semiconductor Table 2. Operating Characteristics Unless otherwise noted: –20°C < TA < 85°C, 2.2 V < VDD < 3.6 V, Acceleration = 0g, Loaded output(1) Characteristic Operating Range(2) Supply Voltage(3) Supply Current Supply Current at Sleep Mode(4) Operating Temperature Range Acceleration Range, X-Axis, Y-Axis, Z-Axis g-Select1 & 2: 00 g-Select1 & 2: 10 g-Select1 & 2: 01 g-Select1 & 2: 11 Output Signal Zero g (TA = 25°C, VDD = 3.3 V)(5) Zero g(4) 2.5g 3.3g 6.7g 10g Sensitivity(4) Bandwidth Response XY Z Noise RMS (0.1 Hz – 1 kHz)(4) Power Spectral Density RMS (0.1 Hz – 1 kHz)(4) Control Timing Power-Up Response Time(6) Enable Response Time(7) Sensing Element Resonant Frequency XY Z Internal Sampling Frequency Output Stage Performance Full-Scale Output Range (IOUT = 30 µA) Nonlinearity, XOUT, YOUT, ZOUT Cross-Axis Sensitivity(8) VFSO NLOUT VXY, XZ, YZ VSS+0.25 –1.0 — — — — VDD–0.25 +1.0 5.0 V %FSO % fGCELL fGCELL fCLK — — — 6.0 3.4 11 — — — kHz kHz kHz tRESPONSE tENABLE — — 1.0 0.5 2.0 2.0 ms ms nRMS nPSD — — 4.7 350 — — mVrms µg/ Hz f-3dB f-3dB — — 350 150 — — Hz Hz Sensitivity (TA = 25°C, VDD = 3.3 V) S2.5g S3.3g S6.7g S10g S,TA 444 333 167 111 — 480 360 180 120 ±0.03 516 387 193 129 — mV/g mV/g mV/g mV/g %/°C VOFF VOFF, TA 1.485 — 1.65 ±5 1.815 — V mg/°C gFS gFS gFS gFS — — — — ±2.5 ±3.3 ±6.7 ±10.0 — — — — g g g g VDD IDD IDD TA 2.2 — — –20 3.3 500 3 — 3.6 800 10 +85 V µA µA °C Symbol Min Typ Max Unit 1. For a loaded output, the measurements are observed after an RC filter consisting of a 1.0 kΩ resistor and a 0.1 µF capacitor on VDD-GND. 2. These limits define the range of operation for which the part will meet specification. 3. Within the supply range of 2.2 and 3.6 V, the device operates as a fully calibrated linear accelerometer. Beyond these supply limits the device may operate as a linear device but is not guaranteed to be in calibration. 4. This value is measured with g-Select in 2.5g mode. 5. The device can measure both + and – accele.


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