SCA720-D01

Murata Electronics Oy

11/13

www.muratamems.fi

Doc. nr. 82171500

Rev.A

3. Application information

The SCA720 should be powered from a well regulated 5 V DC power supply. Coupling of digital

noise to the power supply line should be minimized. 100nF filtering capacitor between VDD pin 11

and GND plane must be used. If regulator is placed far from component for example other PCB it

is recommend adding more capacitance between VDD and GND to ensure current drive capability

of the system. For example 470 pF and 1uF capacitor can be used.

The SCA720 has a ratiometric output. To get the best performance use the same reference

voltage for both the SCA720 and Analog/Digital converter.

Locate the 100nF power supply filtering capacitor close to VDD pin 11. Use as short a trace length

as possible. Connect the other end of capacitor directly to the ground plane. Connect the GND pin

5 to underlying ground plane. Use as wide ground and power supply planes as possible. Avoid

narrow power supply or GND connection strips on PCB.

3.1.

Housing dimensions and recommended PCB la yout

Figure 8

Notes:

•

It is important that the part is parallel to the PCB plane and that there is no angular alignment

error from intended measuring direction during assembly process.

•

1°mounting alignment error will increase the cross-axis sensitivity by 1.7%

•

1°mounting alignment error will change the output by 17 mg

•

Wave soldering is not recommended

•

Ultrasonic cleaning is not allowed

•

A supply voltage by-pass capacitor (> 100 nF) is recommended