ICM-30630
Page 7 of 18
Document Number: AN-000023
Revision: 1.1
3
HARDWARE DESIGN CONSIDERATIONS
3.1
POWER SUPPLIES
ICM-30630 has four power blocks:
A 1.2 V digital power supply that can be applied externally or provided internally. Do not connect VDD1P2 to an
external source, if the internal power circuit is used.
A VDD core power supply for built-in sensors, MCU and DMPs. The supported voltage level range is 1.71 V to
3.6V.
A VDDIO digital supply to make the ICM-30630 digital interface compatible with the AP, wireless transceiver, and
external sensors I/O levels. VDDIO allows for a range of 1.71 V to 3.6 V to be applied. The VDDIO voltage must be
the same as the host AP, wireless transceiver, and external sensor I/O levels. All ICM-30630 digital I/O signal
voltage levels are referenced to VDDIO.
One of internal LDOs power blocks needs an external decoupling capacitor, applied to REGOUT. Usually a 0.1 µF
capacitor is sufficient for decoupling purposes.
Proper capacitor decoupling can reduce power supply noise, as capacitors act as a supplementing current source during
short transient events. InvenSense recommends using separate 0.1 µF decoupling capacitors for VDD, VDDIO and
REGOUT. If using external 1.2 V supply, a 0.1 µF decoupling capacitor is also needed. All decoupling capacitors must be
placed as close as possible to their respective power and ground pins. Ceramic capacitors with X5R material with a
change in capacitance of ±15% over a -55°C to +85°C temperature range are a good choice, covering the entire
operating temperature range of the ICM-30630 at an acceptable accuracy and at reasonable cost.
Power supply connections are displayed in Figure 4 and Figure 5.
Figure 4. External Power Supply for VDD1P2
I2C(M)
SPI/I2C(S)
GPIOs
CLOCK
PROGRAMMING
DEBUGGING
PWRs
U1
ICM-30630
RESETL
1
RESV
2
RESV
3
RESV
4
SWDP1(DATA)
5
SWDP0(CLK)
6
AUX_CL
7
VDDIO
8
SDO/AD0
9
REGOUT
10
FSY NC/GPIO1
11
GPIO2
12
VDD
13
RESV
14
VDD1P2
15
XTALO
16
XTALI
17
GND
18
GPIO0
19
RESV
20
AUX_DA
21
nCS
22
SCL/SCLK
23
SDA/SDI
24
0.1uF
C1
0.1uF
C2
0.1uF
C3
0.1uF
C4
GND
VDDIO
VDD
1V2
