ADIS16445SLASHPCBZ datasheet(21/22 Pages) AD

21 / 22 page

Data Sheet

ADIS16445

Rev. F | Page 21 of 22

APPLICATIONS INFORMATION

MOUNTING TIPS

The mounting and installation process can influence gyroscope

bias repeatability and other key parametric behaviors. To pre-

serve the best performance, use the following guidelines when

developing an attachment approach for the ADIS16445:

•

Focus mounting force at the machine screw locations.

•

Avoid direct force application on the substrate.

•

Avoid placing mounting pressure on the package lid, except

for the edges that border the exposed side of the substrate.

•

Use a consistent mounting torque of 28 inch-ounces on

mounting hardware.

•

Avoid placing translational forces on the electrical connector.

For more ideas on mounting ideas and tips, please refer to

Application Note AN-1305.

POWER SUPPLY CONSIDERATIONS

The power supply must be within 3.15 V and 3.45 V for normal

operation and optimal performance. During start up, the internal

power conversion system starts drawing current when VDD

reaches 1.6 V. The internal processor begins initializing when

VDD is equal to 2.35 V. After the processor starts, VDD must

reach 2.7 V within 128 ms. Also, make sure that the power sup-

ply drops below 1.6 V to shut the device down. Figure 9 shows a

10 µF capacitor on the power supply. Using this capacitor sup-

ports optimal noise performance in the sensors.

ADIS16445/PCBZ

The ADIS16445/PCBZ includes one ADIS16445BMLZ, one

interface PCB, and one flexible connector/cable. This particular

flexible cable mates the ADIS16445BMLZ 20-pin connector to

systems that presently support the 24-pin interface from other

products in this family, such as the ADIS16365, ADIS16375,

and ADIS16488A. This combination of components enables

quicker installation for prototype evaluation and algorithm

development. Figure 22 provides a mechanical design example

for using these three components in a system.

ADIS16445BMLZ

INTERFACE PCB

33.40mm

23.75mm

20.15mm

30.10mm

10.07mm

15.05mm

NOTES

1. USE FOUR M2 MACHINE SCREWS TO ATTACH THE ADIS16445.

2. USE FOUR M3 MACHINE SCREWS TO ATTACH THE INTERFACE PCB.

FLEXIBLE CONNECTOR/CABLE

15mm TO

45mm

Figure 22. Physical Diagram for Mounting the ADIS16445/PCBZ

Figure 23 provides the pin assignments for the interface board.

DNC

DIO2

DNC

DIO1

DIO4

DIO3

GND

RST

GND

VDD

GND

VDD

DIN

DOUT

SCLK

DNC

Figure 23. J1/J2 Pin Assignments for Interface PCB

Installation

The following steps provide an example installation process for

using these three components:

•

Drill and tap M2 and M3 holes in the system frame, according

to the locations in Figure 22.

•

Install the ADIS16445 using M2 machine screws. Use a

mounting torque of 25 inch-ounces.

•

Install the interface PCB using M3 machine screws.

•

Connect J1 on the interface flex to the ADIS16445BMLZ

connector.

•

Connect J2 on the interface flex to J3 on the interface PCB.

Note that J2 (interface flex) has 20 pins and J3 (interface PCB)

has 24 pins. Make sure that Pin 1 on J2 (interface flex)

connects to Pin 20 on J3 (interface PCB). J3 has a Pin 1 in-

dicator to help guide this connection.

•

Use J1 and J2 on the interface PCB to make the electrical

connection with the system supply and embedded pro-

cessor, using 12-pin, 1 mm ribbon cables. The following

parts may be useful in building this type of cable: 3M

Part Number 152212-0100-GB (ribbon crimp connector)

and 3M Part Number 3625/12 (ribbon cable).

The C1/C2 pads on the interface PCB do not have capacitors

on them, but these pads can support the suggested power sup-

ply capacitor of 10 µF (see Figure 9).

PC-BASED EVALUATION TOOLS

The EVAL-ADIS supports PC-based evaluation of the ADIS16445.

Go to www.analog.com/EVAL-ADIS, to download the user guide

(UG-287) and software (IMU evaluation).

ADIS16445/PCBZ Datasheet(PDF) 21 Page - Analog Devices

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