Data Sheet - Freescale Semiconductor

2.4 Electrical Characteristics - sensor and signal chain
V BUS_I_L ≤ (V BUS_I - V SS) ≤ V BUS_I_H, T L ≤ T A ≤ T H, ΔT ≤ 12 °C/min, unless otherwise specified.
57
58
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60
61
62
63
64
65
66
# Characteristic Symbol Min Typ Max Units
Sensitivity (T A = 25°C, 10-bit output @ 100 Hz, referenced to 0Hz: ±5%)
±25 g range
±125 g range
±187 g range
±250 g range
±375 g range
Sensitivity (T L ≤ T A ≤ T H, V BUS_I_UV_F ≤ V BUS_I ≤ V LOW
10-bit output @ 100 Hz, referenced to 0 Hz: ±7%)
±25 g range
±125 g range
±187 g range
±250 g range
±375 g range
MMA27XXW
Sensors
Freescale Semiconductor, Inc. 9
*
*
*
*
*
*
*
*
*
*
SENS 025
SENS 125
SENS 187
SENS 250
SENS 375
SENS 025
SENS 125
SENS 187
SENS 250
SENS 375
19.456
3.8912
2.5944
1.9456
1.2967
19.046
3.8092
2.5398
1.9046
1.2694
20.480
4.0960
2.7310
2.0480
1.3650
20.480
4.0960
2.7310
2.0480
1.3650
21.504
4.3008
2.8676
2.1504
1.4333
21.914
4.3828
2.9222
2.1914
1.4606
LSB/g
LSB/g
LSB/g
LSB/g
LSB/g
LSB/g
LSB/g
LSB/g
LSB/g
LSB/g
67
Digital offset before offset cancellation (10-bit)
±25 g, ±125 g, ±250 g Z-axis
* OFF10Bit -100 0 +100 LSB (1)
68 VBUS_I_UV_F ≤ VBUS_I ≤ VLOW, ±25 g, ±125 g, ±250 g Z-axis
OFF10Bit -100 0 +100 LSB (6)
69 ±187 g, ±250 g X-axis, ±375 g
* OFF10Bit -52 0 +52 LSB (1)
70 VBUS_I_UV_F ≤ VBUS_I ≤ VLOW , ±187 g, ±250 g X-axis, ±375 g
OFF10Bit -52 0 +52 LSB (6)
71 Digital offset after offset cancellation (10-bit, all filter options) OFF10Bit -1 0 +1 LSB (6,8,9)
72
73
74
75
76
77
78
79
80
81
82
83
84
Continuous offset monitor limit
10-bit output, before compensation, ±25 g
10-bit output, before compensation, ±125 g, ±250 g Z-axis
10-bit output, before compensation, ±187 g, ±250 g X-axis, ±375 g
Range of output (10-bit mode)
Acceleration (signed)
Acceleration (unsigned)
Error code (signed)
Error code (unsigned)
Cross-axis sensitivity
Z-axis to X-axis
Y-axis to X-axis
X-axis to Z-axis
Y-axis to Z-axis
System output noise peak (peak value of 100 samples @ 2 kHz)
10-bit mode, LPF = 180 Hz, 2-Pole, All Ranges
10-bit mode, LPF = 400 Hz, 4-Pole, All Ranges
OFF MON
OFF MON
OFF MON
RANGE Signed
RANGE Unsigned
ERR Signed
ERR Unsigned
V ZX
V YX
V XZ
V YZ
n Peak_180
n Peak_400
85
86
System output noise average (average value of 100 samples @ 2 kHz)
10-bit mode, LPF = 180 Hz, 2-pole, all ranges
10-bit mode, LPF = 400 Hz, 4-pole, all ranges
*
*
nRMS_180 nRMS_400 —
—
—
—
+1.0
+1.0
LSB
LSB
(1)
(6)
87 Nonlinearity (10-bit output, all ranges) NLOUT -2 — +2 % (6)
-150
-120
-70
-511
1
—
—
-5
-5
-5
-5
-3
-4
—
—
—
—
—
-512
0
—
—
—
—
—
—
+150
+120
+70
+511
1023
—
—
+5
+5
+5
+5
+3
+4
LSB
LSB
LSB
LSB
LSB
LSB
LSB
%
%
%
%
LSB
LSB
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(7,8)
(7,8)
(7,8)
(7,8)
(7,9)
(7,8)
(7,9)
(6)
(6)
(6)
(6)
(1)
(6)