Sensors
Freescale Semiconductor, Inc. 8
MMA7660FC
Notes
1. These parameters are tested in production at final test.
2. Assuming VDD power on slope is < 1 ms.
3. A measure of the devices ability to reject an acceleration applied 90° from the true axis of sensitivity.
4. Noise is defined as quantiles given to a sample size. These are the occurrences of noise: 94% = ±1 count, 5% = ±2 counts, and 1% = ±3
counts.
Table 4. Operating Characteristics
Unless otherwise noted: -40°C < T
A
< 85°C, 2.4 V < AV
DD
< 3.6 V, 1.71 V < DV
DD
< 3.6 V, Acceleration = 0g
Typical values are at AV
DD
= 2.8 V, DV
DD
= 2.8 V, T
A
= +25°C
Characteristics Symbol Min Typ Max Unit
Analog Supply Voltage
Standby/Operation Mode AV
DD
2.4 2.8 3.6 V
Enable Bus Modeon Mode AV
DD
0 V
Digital I/O Pins Supply Voltage
Standby/Operation Mode DV
DD_IO
1.71 2.8 AV
DD
V
Enable Bus Modeon Mode DV
DD_IO
1.71 1.8 3.6 V
Supply Current Drain
Off Mode I
DD
0.4 µA
Power Down Mode I
DD
2 µA
Standby Mode
(1)
I
DD
0 2 10 µA
Active Mode, ODR = 1 I
DD
47 µA
Active Mode, ODR = 2 I
DD
49 µA
Active Mode, ODR = 4 I
DD
54 µA
Active Mode, ODR = 8 I
DD
66 µA
Active Mode, ODR = 16 I
DD
89 µA
Active Mode, ODR = 32 I
DD
133 µA
Active Mode, ODR = 64 I
DD
221 µA
Active Mode
(1)
, ODR = 120 I
DD
294 µA
Acceleration Range ±1.5 g
Operating Temperature Range T
A
-40 25 85 °C
0g Output Signal (T
A
= 25°C, AV
DD
= 2.8 V)
0g Offset ±1.5g range
(1)
V
OFF
-3 0 3 counts
0g Offset Temperature Variation
X
Y
Z
-1.3
+1.5
-1.0
mg/°C
mg/°C
mg/°C
Sensitivity
(1)
(T
A
= 25°C, AV
DD
= 2.8 V)
±1.5g range 6-bit 21.33 count/g
Acceleration Sensitivity at T
AMB
19.62 21.33 23.04 count/g
Acceleration Sensitivity Temperature Variation ±0.01 %/°C
Input High Voltage V
IH
0.7 x D
VDD
Input Low Voltage V
IL
0.35 x D
VDD
Output Low Voltage (IOL = 6 mA + SDA, INT) V
OL
0.5 V
Input Leakage Current I
IH
, I
IL
0.025 µA
Internal Clock Frequency
(1)
(T
A
= 25°C, AV
DD
= 2.8 V)
t
CLK
135 150 165 kHz
I
2
C Interface Speed
400 kHz
Control Timing
Turn on time from AV
DD
= 0 V to AV
DD
= 2.5 V
(2)
1.3 ms
Turn off time from Active to Standby Mode 1 ms
Turn on time Standby to Active Mode 12 ms + 1/ODR ms
Timing Clock Source Accuracy (T
A
= 25°C, DV
DD
= 1.8 V) -10 10 %
Timing Clock Source Temperature Variation -15 15 %
Cross Axis Sensitivity
(3)
±1 %
Noise
(4)
±1 count