SM34 Data Sheet #:

TM095

Page 30

Rev:

05 Date: 11/19/12

© Copyright 2012 The Connor-Winfield Corp. All Rights Reserved

Specifications subject to change without notice

Required External Components

1.

Place series resistors (33 ohms) on all reference inputs (Pins 4 - 7 & 15-18).

2.

Place series resistors (33 ohms) on SPI_IN and SPI_CLK inputs (Pins 25, 26).

3.

Place one .01uF and one 47-100uF capacitor at the input power pin (Pin 27).

Mechanical Specifications continued

PCB Layout Recommendations

1.

Orient module so airflow is parallel along the header strips (pins).

2.

Place de-coupling and/or filter components as close to module pins as possible.

3.

Do not place any components directly beneath the module on the topside of the host PCB.

4.

Ensure that only clean and well-regulated power is supplied to the module.

5.

Isolate power and ground inputs to the module from noisy sources.

6.

Provide power and ground connections through a 0.050” wide trace (minimum) using 1-oz. Cu or equivalent copper feature

(i.e. internal plane, copper area fill, etc.).

7.

Keep module signals away from sensitive or noisy analog and digital circuitry.

8.

Avoid split ground planes as high-frequency return currents may be affected.

9.

Allow extra spacing between traces of high-frequency inputs and outputs.

10.

Keep all traces as short as possible - avoid meandering trace paths.

11.

Avoid routing signals directly beneath the module on the topside of the host PCB.

12.

If possible, provide a copper area directly beneath the module on the topside of the host PCB. Connect this copper area to

ground.