Murata MEMS Evaluation
Unit User Manual
Murata Electronics Oy
Subject to changes
32/34
www.murata.com
Doc.Nr. 82175700
Rev.D
9
Electrical characteristics
9.1 Power supply
The evaluation board uses USB as its principal power supply and does not need any other supplies
when used with 2.5V and 3.3V sensors (chip carriers). The +5V voltage needed by Murata
SCC1300 sensor is generated from 3.3V with step-up regulator on SCC1300 sensor board so
external power supply is not needed with Murata SCC1300 sensor board. For extension boards
with analog inclinometer and accelerometer sensors an additional external power supply is needed.
There is an External Vcc connector on the evaluation board, or the external power can be provided
through the 16-pin external board connector. The external power supply voltage range is from 7V
to 15V.
Figure 46. Evaluation board with external power cable inserted
The evaluation board
’s current consumption is approximately 60 mA in active mode and less than
20 mA in sleep mode.
For use with 3.3V sensors or Murata SCC1300 combo sensors or with extension boards no
jumpers are needed on board. For use with 2.5V or 5V sensors on chip carrier sockets without
separate power regulator it is necessary to add jumpers to the 3-pin headers on the board; see
Table 3 below for options:
Table 3. Power supply jumper options for chip carrier
PIN 1
With no jumpers
Output is 3.3V
Jumper here gives 2.5V
PIN 2
Jumper here gives 5V
PIN 3
