Data Sheet

ADIS16446

Rev. 0 | Page 21 of 23

APPLICATIONS INFORMATION

MOUNTING TIPS

The mounting and installation process can influence gyroscope

bias repeatability and other key parametric behaviors. To

preserve the best performance, use the following guidelines

when developing an attachment approach for the ADIS16446:

•

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 the

mounting hardware.

•

Avoid placing translational forces on the electrical

connector.

For additional mounting ideas and tips, refer to the AN-1305

Application Note.

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

supply drops below 1.6 V to shut the device down. Using an

optional 10 µF external capacitor between VDD and GND is

recommended for the filtering of power supply noise.

EVALUATION TOOLS

Breakout Board, ADIS16IMU2/PCBZ

The ADIS1644X/FLEX and ADIS16IMU2/PCBZ accessories

(sold separately) provide access to the ADIS16446 through larger

connectors that support standard 1 mm ribbon cabling and a

simplified method for connecting to an embedded processor

platform. These accessories also provide an easy way to connect

the ADIS16446 to either the EVAL-ADIS-FX3 or to the older

EVAL-ADIS2 evaluation system. Figure 23 provides a mechanical

design example for using these two components with the

ADIS16446 IMU in a system.

Figure 22 provides the pin assignments for J1 on the

ADIS16IMU2/PCBZ breakout board.

1

RST

2

SCLK

3

CS

4

DOUT

5

DNC

6

DIN

7

GND

8

GND

9

GND

10

VDD

11

VDD

12

VDD

13

DIO1

14

DIO2

15

DIO3

16

DIO4/CLKIN

J1

Figure 22. J1Pin Assignments for the ADIS16IMU2/PCBZ

The C1 and C2 locations on the ADIS16IMU2/PCBZ provide

users with the pads to install 10 µF of capacitance across VDD

and GND, which Figure 9 recommends for best performance.

ADIS16446BMLZ

ADIS16IMU2/PCBZ

(INTERFACE BOARD)

33.40mm

23.75mm

20.15mm

30.10mm

10.07mm

15.05mm

J1

J2

1

15

16

2

23

1

2

24

NOTES

1. USE FOUR M2 MACHINE SCREWS TO ATTACH THE ADIS16446.

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

3. EITHER A SAMTEC FFSD-08-D-12.00-01-N OR FFSD-08-D-24.00-01-N CABLE ASSEMBLY CAN

BE USED TO CONNECT THE ADIS16IMU2 TO THE EVAL-ADIS2Z EVALUATION BOARD.

ADIS1644X/FLEX

(FLEXIBILE CONNECTOR/CABLE)

15mm TO

45mm

Figure 23. Physical Diagram for ADIS16446 Accessories