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MMA6813BKW Datasheet(PDF) 7 Page - Freescale Semiconductor, Inc |
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MMA6813BKW Datasheet(HTML) 7 Page - Freescale Semiconductor, Inc |
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7 / 54 page  Sensors Freescale Semiconductor, Inc. 7 MMA68xx 2.4 Electrical Characteristics - Sensor and Signal Chain VL ≤ (VCC - VSS) ≤ VH, TL ≤ TA ≤ TH, |ΔTA| < 25 K/min unless otherwise specified # Characteristic Symbol Min Typ Max Units 55 56 57 58 X-Axis Digital Sensitivity (SPI, 10-bit Output) 50g (MMA6813) 60g (MMA6811, MMA6826) 100g (MMA6825) 120g (MMA6821, MMA6823) * * * * SENS SENS SENS SENS ⎯ ⎯ ⎯ ⎯ 9.766 8.192 4.883 4.096 ⎯ ⎯ ⎯ ⎯ LSB/g LSB/g LSB/g LSB/g (1, 9) (1, 9) (1, 9) (1, 9) 59 60 61 62 Y-Axis Digital Sensitivity (SPI, 10-bit Output) 25g (MMA6811, MMA6821) 50g (MMA6813QR) 60g (MMA6823, MMA6826) 100g (MMA6825) * * * * SENS SENS SENS SENS ⎯ ⎯ ⎯ ⎯ 20.479 9.766 8.192 4.883 ⎯ ⎯ ⎯ ⎯ LSB/g LSB/g LSB/g LSB/g (1, 9) (1, 9) (1, 9) (1, 9) 63 64 65 Sensitivity Error TA = 25°C -40°C ≤ TA ≤ 105°C -40°C ≤ TA ≤ 105°C,VCC_UV_f ≤ VCC - VSS ≤ VL * * ΔSENS ΔSENS ΔSENS -4 -5 -5 ⎯ ⎯ ⎯ +4 +5 +5 % % % (1) (1) (3) 66 67 68 69 Offset at 0g (No Offset Cancellation) 10-bits, unsigned 10-bits, signed 10-bits, unsigned, VCC_UV_f ≤ VCC - VSS ≤ VL 10-bits, signed, VCC_UV_f ≤ VCC - VSS ≤ VL * * OFFSET OFFSET OFFSET OFFSET 452 -60 452 -60 512 0 512 0 572 +60 572 +60 LSB LSB LSB LSB (1) (1) (3) (3) 70 71 Offset Monitor Thresholds Positive Threshold (10-bits, unsigned) Negative Threshold (10-bits, unsigned) OFFTHRPOS OFFTHRNEG ⎯ ⎯ 612 412 ⎯ ⎯ LSB LSB (7) (7) 72 73 74 75 Range of Output (SPI, 10-bits unsigned) Normal Fault Response Code Unused Codes Unused Codes RANGE FAULT UNUSED UNUSED 32 — 1 993 — 0 ⎯ ⎯ 992 — 31 1023 LSB LSB LSB LSB (7) (7) (7) (7) 76 77 78 79 Range of Output (SPI, 10-bits, signed) Normal Fault Response Code Unused Codes Unused Codes RANGE FAULT UNUSED UNUSED -480 — -511 481 — -512 — — 480 — -481 511 LSB LSB LSB LSB (7) (7) (7) (7) 80 Nonlinearity * NLOUT -1 — 1 % FSR (3) 81 82 System Output Noise RMS (10-bit, All Ranges, 400 Hz, 4-pole LPF) Peak to Peak (10-bit, All Ranges, 400 Hz, 4-pole LPF) nRMS nP-P — — — — 0.5 1.0 LSB LSB (3) (3) 83 84 85 86 Cross-Axis Sensitivity VZX VYX VZY VXY * * * * VZX VYX VZY VXY -4 -4 -4 -4 — — — — +4 +4 +4 +4 % % % % (3) (3) (3) (3) 87 88 89 90 91 92 Self-Test Output Change (Ref Section 3.6) STMAG_X, STMAG_Y = 0, TA = 25°C STMAG_X, STMAG_Y = 0, -40°C ≤ TA ≤ 105°C STMAG_X, STMAG_Y = 1, TA = 25°C STMAG_X, STMAG_Y = 1, -40°C ≤ TA ≤ 105°C STMAG_X, STMAG_Y = 0, -40°C ≤ TA ≤ 105°C VCC_UV_f ≤ VCC - VSS ≤ VL STMAG_X, STMAG_Y = 1, -40°C ≤ TA ≤ 105°C VCC_UV_f ≤ VCC - VSS ≤ VL * * * * ΔSTLow25 ΔSTLow ΔSTHI25 ΔSTHI ΔSTLow ΔSTHI ΔSTMIN 11.25 10.68 22.5 21.37 10.68 21.37 ΔSTNOM 15 15 30 30 15 30 ΔSTMAX 18.75 19.69 37.5 39.38 19.69 39.38 g g g g g g (1) (1) (1) (1) (3) (3) 93 94 Self-Test Cross Axis Output Y-Axis Output with X-Axis Self-Test X-Axis Output with Y-Axis Self-Test ΔSTCrossAxis ΔSTCrossAxis -10 -10 ⎯ ⎯ +10 +10 LSB LSB (1) (1) 95 Acceleration (without hitting internal g-cell stops) X/Y-Axis, Any Range Positive/Negative gg-cell_Clip 500 560 600 g (19) |
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