ADIS16448SLASHPCBZ datasheet(22/24 Pages) AD

22 / 24 page

ADIS16448

Data Sheet

Rev. B | Page 22 of 24

APPLICATIONS INFORMATION

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. Figure 9

shows a 10 μF capacitor on the power supply. Using this

capacitor supports optimal noise performance in the sensors.

ADIS16448/PCBZ

The ADIS16448/PCBZ includes one ADIS16448AMLZ, one

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

flexible cable mates the ADIS16448AMLZ to any system that

uses the ADIS1636x, ADIS16375, ADIS16385, ADIS1640x, or

ADIS1648x IMU products, which all use a 24-pin interface,

rather than the 20-pin interface that the ADIS16448 uses. This

combination of components enables quicker installation for

prototype evaluation and algorithm development. Figure 24

provides a mechanical design example for using these three

components in a system.

ADIS16448BMLZ

INTERFACE PCB

33.40mm

23.75mm

20.15mm

30.10mm

10.07mm

15.05mm

NOTES

1. USE FOUR M2 MACHINE SCREWS TO ATTACH THE ADIS16448.

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

FLEXIBLE CONNECTOR/CABLE

15mm TO

45mm

Figure 24. Physical Diagram for Mounting the ADIS16448/PCBZ

Figure 25 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 25. 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 24.



Install the ADIS16448 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 ADIS16448AMLZ

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

indicator 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 supply

capacitor of 10 μF (see Figure 9).

PC-BASED EVALUATION TOOLS

The EVAL-ADIS supports PC-based evaluation of the

ADIS16448. Go to www.analog.com/EVAL-ADIS, to down-

load the user guide (UG-287) and software (IMU evaluation).

ADIS16448/PCBZ Datasheet(PDF) 22 Page - Analog Devices

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