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MMA6853BKW Datasheet(PDF) 8 Page - Freescale Semiconductor, Inc |
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MMA6853BKW Datasheet(HTML) 8 Page - Freescale Semiconductor, Inc |
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8 / 52 page  Sensors 8 Freescale Semiconductor, Inc. MMA685x 2.5 Dynamic Electrical Characteristics - Signal Chain VL ≤ (VCC - VSS) ≤ VH, TL ≤ TA ≤ TH, |ΔTA| < 25 K/min unless otherwise specified # Characteristic Symbol Min Typ Max Units 94 95 96 DSP Sample Rate (LPF 0,1,2,3,4,5) DSP Sample Rate (LPF 8,9,10,11,12,13) Interpolation Sample Rate tS tS tINTERP ⎯ ⎯ ⎯ 64/fOSC 128/fOSC tS/2 ⎯ ⎯ ⎯ s s s (7) (7) (7) 97 98 Datapath Latency (excluding g-cell and Low Pass Filter) TS = 64/fOSC TS = 128/fOSC * * tDataPath_8 tDataPath_16 33.0 51.9 34.8 54.6 36.5 57.4 μs μs (7, 16) (7, 16) 99 100 101 102 103 104 Low-Pass Filter (ts = 8 μs) Cutoff frequency 0: 100 Hz, 4-pole Cutoff frequency 1: 300 Hz, 4-pole Cutoff frequency 2: 400 Hz, 4-pole Cutoff frequency 3: 800 Hz, 4-pole Cutoff frequency 4: 1000 Hz, 4-pole Cutoff frequency 5: 400 Hz, 3-pole * * * * * * fC0(LPF) fC1(LPF) fC2(LPF) fC3(LPF) fC4(LPF) fC5(LPF) 95 285 380 760 950 380 100 300 400 800 1000 400 105 315 420 840 1050 420 Hz Hz Hz Hz Hz Hz (3, 7, 17) (7, 17) (7, 17) (7, 17) (7, 17) (7, 17) 105 106 107 108 109 110 Low-Pass Filter (ts = 16μs) Cutoff frequency 8: 50 Hz, 4-pole Cutoff frequency 9: 150 Hz, 4-pole Cutoff frequency 10: 200 Hz, 4-pole Cutoff frequency 11: 400 Hz, 4-pole Cutoff frequency 12: 500 Hz, 4-pole Cutoff frequency 13: 200 Hz, 3-pole * * * * * * fC8(LPF) fC9(LPF) fC10(LPF) fC11(LPF) fC12(LPF) fC13(LPF) 47.5 142.5 190 380 475 190 50 150 200 400 500 200 52.5 157.5 210 420 525 210 Hz Hz Hz Hz Hz Hz (7, 17) (7, 17) (7, 17) (7, 17) (7, 17) (7, 17) 111 112 113 114 115 116 117 Offset Cancellation (Normal Mode, 10-Bit Output) Offset Averaging Period Offset Slew Rate Offset Update Rate Offset Correction Value per Update Positive Offset Correction Value per Update Negative Offset Correction Threshold Positive Offset Correction Threshold Negative * * * * * * * OFFAVEPER OFFSLEW OFFRATE OFFCORRP OFFCORRN OFFTHP OFFTHN ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 6.291456 0.2384 1049 0.25 -0.25 0.125 0.125 ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ s LSB/s ms LSB LSB LSB LSB (7) (7) (7) (7) (7) (7) (7) 118 Offset Monitor Bypass Time after Self-Test Deactivation tST_OMB ⎯ 320 ⎯ tS (3, 7) 119 Time Between Acceleration Data Requests tACC_REQ 15 ⎯⎯ μs (3, 7, 20) 120 121 122 Arming Output Activation Time (ARM, IARM = 200 μA) Moving Average and Count Arming Modes (2,3,4,5) Unfiltered Mode Activation Delay (Reference Figure 28) Unfiltered Mode Arm Assertion Time (Reference Figure 28) tARM tARM_UF_DLY tARM_UF_ASSERT 0 0 5.00 ⎯ ⎯ ⎯ 1.05 1.05 6.579 μs μs μs (3, 12) (3, 12) (3) 123 Sensing Element Natural Frequency (-40°C ≤ T A ≤ 105°C) fgcell 10791 ⎯ 15879 Hz (19) 124 Sensing Element Cutoff Frequency (-3 dB ref. to 0 Hz, -40°C ≤ T A ≤ 105°C) fgcell 0.851 ⎯ 2.29 kHz (19) 125 Sensing Element Damping Ratio (-40°C ≤ T A ≤ 105°C) ζ gcell 2.46 ⎯ 9.36 ⎯ (19) 126 Sensing Element Delay (@100 Hz, -40°C ≤ T A ≤ 105°C) fgcell_delay 70 ⎯ 187 μs (19) 127 Package Resonance Frequency fPackage 100 ⎯⎯ kHz (19) 128 Package Quality Factor qPackage 1 ⎯ 5 (19) |
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