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2.4
Electrical Characteristics - Sensor and Signal Chain
V L ≤ (V CC - V SS ) ≤ V H , T L ≤ T A ≤ T H , | Δ T A | < 25 K/min unless otherwise specified.
#
Characteristic
Symbol
Min
Typ
Max
Units
Digital Sensitivity (SPI)
53
54
105.5g (12-Bit Output)
120 g (12-Bit Output)
*
*
SENS
SENS
—
—
18.2
16.0
—
—
LSB/g
LSB/g
(1,9)
(1,9)
Sensitivity Error
55
56
57
T A = 25 C
-40 C ≤ T A ≤ 105 C
-40 C ≤ T A ≤ 105 C,V CC_UV_f ≤ V CC - V SS ≤ V L
*
*
Δ SENS
Δ SENS
Δ SENS
-4
-5
-5
—
—
—
+4
+5
+5
%
%
%
(1)
(1)
(3)
Offset at 0 g (No Offset Cancellation)
58a
59a
60a
61a
12 bits, unsigned
12 bits, signed
12 bits, unsigned, V CC_UV_f ≤ V CC - V SS ≤ V L
12 bits, signed, V CC_UV_f ≤ V CC - V SS ≤ V L
*
*
OFFSET
OFFSET
OFFSET
OFFSET
1988
-60
1988
-60
2048
0
—
—
2108
+60
1988
-60
LSB
LSB
LSB
LSB
(1)
(1)
(3)
(3)
Offset at 0g (With Offset Cancellation)
62b
63b
64b
65b
12 bits, unsigned
12 bits, signed
12 bits, unsigned, V CC_UV_f ≤ V CC - V SS ≤ V L
12 bits, signed, V CC_UV_f ≤ V CC - V SS ≤ V L
*
*
OFFSET
OFFSET
OFFSET
OFFSET
2047.75
-0.25
2047.75
-0.25
2048
0
—
—
2048.25
+0.25
2048.25
+0.25
LSB
LSB
LSB
LSB
(9,7)
(9,7)
(9)
(9)
Offset Monitor Thresholds
66
67
Positive Threshold (12 bits signed)
Negative Threshold (12 bits signed)
OFFTHR POS
OFFTHR NEG
—
—
100
-100
—
—
LSB
LSB
(7)
(7)
Range of Output (SPI, 12 bits, unsigned)
68
69
70
71
Normal
Fault Response Code
Unused Codes
Unused Codes
RANGE
FAULT
UNUSED
UNUSED
128
—
1
3969
—
0
—
—
3968
—
127
4095
LSB
LSB
LSB
LSB
(7)
(7)
(7)
(7)
Range of Output (SPI, 12 bits, signed)
72
73
74
Normal
Unused Codes
Unused Codes
RANGE
UNUSED
UNUSED
-1920
-2047
1921
—
—
—
1920
-1921
2047
LSB
LSB
LSB
(7)
(7)
(7)
75 Nonlinearity
*
NL OUT
-1
—
1
% FSR
(3)
System Output Noise
76
77
RMS (12 bits, All Ranges, 400 Hz, 3-pole LPF)
Peak to Peak (12 bits, All Ranges, 400 Hz, 3-pole LPF)
n RMS
n P-P
—
—
—
—
1
3
LSB
LSB
(3)
(3)
Cross-Axis Sensitivity
78
79
80
81
82
83
84
85
V ZX
V YX
Self Test Output Change (Ref Section 3.6 )
105.5g, T A = 25 C
105.5g, -40 C ≤ T A ≤ 105 C
105.5g, -40 C ≤ T A ≤ 105 C, V CC_UV_f ≤ V CC - V SS ≤ V L
120g, T A = 25 C
120g, -40 C ≤ T A ≤ 105 C
120g, -40 C ≤ T A ≤ 105 C, V CC_UV_f ≤ V CC - V SS ≤ V L
*
*
*
*
*
*
V ZX
V YX
Δ ST 105_25
Δ ST 105_ Δ T
Δ ST 105_ Δ T Δ V
Δ ST 120_25
Δ ST 120_ Δ T
Δ ST 120_ Δ T Δ V
-4
-4
Δ ST MIN
442
414
414
387
363
363
—
—
Δ ST NOM
553
553
553
484
484
484
+4
+4
Δ ST MAX
663
690
690
581
605
605
%
%
LSB
LSB
LSB
LSB
LSB
LSB
(3)
(3)
(1)
(1)
(3)
(1)
(1)
(3)
Self Test Output Accuracy
86
Δ from Stored Value, including Sensitivity Error
-40 C ≤ TA ≤ 105 C (Ref Section 3.6 )
*
Δ STACC
-10
—
+10
%
(3)
87 Sigma Delta Modulator Range
88 Acceleration (without hitting internal g-cell stops
g ADCl_Clip
g g-cell_Clip
375
500
400
560
450
600
g
g
(19)
(19)
MMA655x
Sensor
Freescale Semiconductor, Inc.
7
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