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MMA685X Datasheet(PDF) 7 Page - Freescale Semiconductor, Inc |
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MMA685X Datasheet(HTML) 7 Page - Freescale Semiconductor, Inc |
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7 / 52 page  Sensors Freescale Semiconductor, Inc. 7 MMA685x 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 56 57 58 59 Digital Sensitivity (SPI, 10-Bit Output) 25g (MMA6851) 50g (MMA6853) 60g (MMA6856) 120g (MMA6855) * * * * SENS SENS SENS SENS ⎯ ⎯ ⎯ ⎯ 20.479 9.766 8.192 4.096 ⎯ ⎯ ⎯ ⎯ LSB/g LSB/g LSB/g LSB/g (1, 9) (1, 9) (1, 9) (1, 9) 60 61 67 Sensitivity Error TA = 25°C -40°C ≤ T A ≤ 105°C -40°C ≤ T A ≤ 105°C,VCC_UV_f ≤ VCC - VSS ≤ VL * * ΔSENS ΔSENS ΔSENS -4 -5 -5 ⎯ ⎯ ⎯ +4 +5 +5 % % % (1) (1) (3) 68 69 70 71 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) 72 73 Offset Monitor Thresholds Positive Threshold (10-Bits, unsigned) Negative Threshold (10-Bits, unsigned) OFFTHRPOS OFFTHRNEG — — 612 412 — — LSB LSB (7) (7) 74 75 76 77 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) 78 79 80 81 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) 82 Nonlinearity * NLOUT -1 — 1 % FSR (3) 83 84 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) 85 86 Cross-Axis Sensitivity VZX VYX * * VZX VYX -4 -4 — — +4 +4 % % (3) (3) 87 88 89 90 91 92 Self-Test Output Change (Ref Section 3.6) STMAG = 0, TA = 25°C STMAG = 0, -40°C ≤ T A ≤ 105°C STMAG = 1, TA = 25°C STMAG = 1, -40°C ≤ T A ≤ 105°C STMAG = 0, -40°C ≤ T A ≤ 105°C VCC_UV_f ≤ VCC - VSS ≤ VL STMAG = 1, -40°C ≤ T A ≤ 105°C VCC_UV_f ≤ VCC - VSS ≤ VL * * * * ΔST Low25 ΔST Low ΔST HI25 ΔST HI ΔST Low ΔST HI ΔST MIN 11.25 10.68 22.5 21.37 10.68 21.37 ΔST NOM 15 15 30 30 15 30 ΔST MAX 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 Acceleration (without hitting internal g-cell stops) Any Range Positive/Negative gg-cell_Clip 500 560 600 g (19) |
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