LSM303AH Datasheet, PDF (21/82 Pages) –

LSM303AH
4
Functionality
Functionality
4.1
Magnetometer
4.1.1
Magnetometer power modes
The LSM303AH magnetometer provides two different power modes: high-resolution and
low-power modes.
The tables below summarize the magnetometer RMS noise values and current
consumption in different product configurations.
When the low-pass filter is enabled, the bandwidth is reduced while noise performance is
improved without any increase in power consumption.
Table 10. RMS noise of operating modes
CFG_REG_B_M[LPF]
or
CFG_REG_B_M[OFF_CANC]
(CFG_REG_A_M [LP = 0])
high-resolution mode
BW [Hz]
Noise RMS [mg]
(CFG_REG_A_M [LP = 1])
low-power mode
BW [Hz]
Noise RMS [mg]
0 (disable)
ODR/2
4.5
ODR/2
9
1 (enable)
ODR/4
3
ODR/4
6
ODR
(Hz)
10
20
50
100
Table 11. Current consumption of operating modes
Current consumption
(μA)
(CFG_REG_A_M
[LP] = 0)
high-resolution
CFG_REG_B_M
[OFF_CANC] = 0
Current consumption
(μA)
(CFG_REG_A_M
[LP] = 1)
low-power
CFG_REG_B_M
[OFF_CANC] = 0
Current consumption
(μA)
(CFG_REG_A_M
[LP] = 0)
high-resolution
CFG_REG_B_M
[OFF_CANC] = 1
Current consumption
(μA)
(CFG_REG_A_M
[LP] = 1)
low-power
CFG_REG_B_M
[OFF_CANC] = 1
100
25
125
55
200
50
240
105
475
125
590
255
950
250
1180
505
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