MMA2301EG datasheet(5/10 Pages) FREESCALE

5 / 10 page

Sensors

Freescale Semiconductor

MMA2301KEG

BASIC CONNECTIONS

PINOUT DESCRIPTION

Figure 4. SOIC Accelerometer with Recommended

Connection Diagram

Figure 5. Recommend PCB Layout for Interfacing

Accelerometer to Microcontroller

NOTES:

•

Use a 0.1

μF capacitor on VDD to decouple the power

source.

•

Physical coupling distance of the accelerometer to the

microcontroller should be minimal.

•

Place a ground plane beneath the accelerometer to

reduce noise, the ground plane should be attached to all

of the open ended terminals shown in Figure 5

•

Use an RC filter of 1 k

Ω and 0.01 μF on the output of the

accelerometer to minimize clock noise (from the switched

capacitor filter circuit).

•

PCB layout of power and ground should not couple power

supply noise.

•

Accelerometer and microcontroller should not be a high

current path.

A/D sampling rate and any external power supply

switching frequency should be selected such that they do not

interfere with the internal accelerometer sampling frequency.

This will prevent aliasing errors.

Table 3. Pin Descriptions

Pin No.

Pin Name

Description

1 thru 3

N/C

Leave unconnected.

Logic input pin used to initiate self-

test.

5VOUT

Output voltage of the accelerometer.

STATUS

Logic output pin to indicate fault.

7VSS

The power supply ground.

8VDD

The power supply input.

9 thru 13

Trim pins

Used for factory trim. Leave

unconnected.

14 thru 16

—

No internal connection. Leave

unconnected.

N/C

VOUT

STATUS

VDD

VSS

MMA2301KEG

VDD

VSS

VOUT

Output

Signal

1 kΩ

0.01 μF

Logic

Input

VDD

0.1 μF

Status

A/D In

VRH

VSS

VDD

VOUT

VSS

VDD

0.01 μF

1 kΩ

0.1 μF

Power Supply

0.1 μF

STATUS

0.1 μF

PCB Layout

MMA2301EG Datasheet(PDF) 5 Page - Freescale Semiconductor, Inc

MMA2301EG Datasheet(HTML) 5 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10

Datasheet Download

Link URL