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IC-PV Datasheet, PDF (19/28 Pages) IC-Haus GmbH – BATTERY-BUFFERED HALL MULTITURN ENCODER
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iC-PV
BATTERY-BUFFERED HALL MULTITURN ENCODER
CALCULATING CURRENT CONSUMPTION
Rev E2, Page 19/28
Interface Mode (SEL = LOW)
The current consumption of the iC-PV can be config-
ured by parameter A_MAX. Besides the current con-
sumption, this parameter sets the maximum angle ac-
celeration (from shaft halt) supported by the iC-PV
in the respective configuration. The relationship be-
tween maximum acceleration and current consump-
tion is shown in Table 20. For accelerations below
48 · 103rad/s2, the typical current consumption lies be-
low 10 µA.
For applications were only sporadic motor movement is
expected during battery supply, Table 20 mainly defines
the current consumed by iC-PV. Additionally, Table 21
gives typical values in case of enduring movement at a
certain angular velocity.
A_MAX
Code
000
001
010
011
100
101
110
111
Addr. 0x03; bit 5:3
◦
αmax [ s2 ]
αmax
[
rad
s2
]
40 · 106
10 · 106
2.5 · 106
625 · 103
160 · 103
40 · 103
10 · 103
reserved
760 · 103
190 · 103
48 · 103
12 · 103
3 · 103
0.75 · 103
0.2 · 103
typ.
Iavg [µA]
26
14
7
4
2.5
2
1.5
max.
Iavg [µA]
36
18
10
6
4
3
2.5
Table 20: Maximum supported angular acceleration
(from shaft halt) and average current con-
sumption on shaft halt or slow angular veloc-
ity. V(VBAT) = 3.6 V, V(PRE) < 0.5 V.
I(VBAT) for angular velocity [RPM]
f [RPM]
f [Hz]
0
< 125
< 250
< 500
< 1000
< 2000
< 4000
< 8000
< 16000
0
<2
<4
<8
< 16
< 33
< 66
< 133
< 266
Iavg [µA]
AMAX =
110
1.5
1.5
2
2.5
4
7
14
26
51
Iavg [µA]
AMAX =
101
2
2
2
2.5
4
7
14
26
51
Iavg [µA]
AMAX =
100
2.5
2.5
2.5
2.5
4
7
14
26
51
Iavg [µA]
AMAX =
011
4
4
4
4
4
7
14
26
51
Iavg [µA]
AMAX =
010
7
7
7
7
7
7
14
26
51
Iavg [µA]
AMAX =
001
14
14
14
14
14
14
14
26
51
Iavg [µA]
AMAX =
000
26
26
26
26
26
26
26
26
51
Table 21: Average current consumption vs. angular velocity. Typical values for V(VBAT) = 3.6 V, Ta = 25 °C and
V(PRE) < 0.5 V.
Parallel Encoder Mode (SEL = HIGH)
The current consumption in parallel encoder mode is di-
rectly proportional to the sampling frequency, fs. Lower
sampling frequencies use less current and higher fre-
quencies use more current. The typical mean value
of current consumed by iC-PV, is calculated as shown
below (V(VBAT) = 3.6 V, Tj = 25 °C) :
Iavg[µA] = 25 · fs[kHz]
For instance, at a sampling frequency of 1 000 samples
per second, fs = 1 kHz and I = 25 µA. At 100 samples
per second, I = 2.5 µA.
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