ADIS16501SLASHPCBZ datasheet(43/45 Pages) AD

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Data Sheet

ADIS16501

APPLICATIONS INFORMATION

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Rev. B | 43 of 45

for all key process attributes (for example, peak temperatures, dwell

times, and ramp rates).

POWER SUPPLY CONSIDERATIONS

The ADIS16501 contains 6 µF of decoupling capacitance across

the VDD and GND pins. When the VDD voltage rises from 0 V

to 3.3 V, the charging current for this capacitor bank imposes the

following current profile (in amperes):

IDDt =CdVDDdt=6×10−6×dVDDtdt

where:

IDD(t) is the current demand on the VDD pin during the initial power

supply ramp, with respect to time.

C is the internal capacitance across the VDD and GND pins (6 µF).

VDD(t) is the voltage on the VDD pin, with respect to time.

For example, if VDD follows a linear ramp from 0 V to 3.3 V,

in 66 µs, the charging current is 300 mA for that timeframe.

The ADIS16501 also contains embedded processing functions that

present transient current demands during initialization or reset

recovery operations. During these processes, the peak current

demand reaches 250 mA and occurs at a time that is approximately

40 ms after VDD reaches 3.0 V (or ~40 ms after initiating a reset

sequence).

EVALUATION TOOLS

Breakout Boards

The ADIS16501 has a breakout board that provides a simple way to

connect an ADIS16501 model and an existing embedded processor

platform. Table 134 shows the model number for the breakout

board. Figure 63 shows the ADIS16505-2 board that is identical to

the ADIS16501 board.

Figure 63. ADIS16501 Breakout Board (ADIS16505-2 Shown)

Table 134. Breakout Board Models

Breakout Board Model

ADIS16501 Model

Table 134. Breakout Board Models (Continued)

Breakout Board Model

ADIS16501 Model

ADIS16501/PCBZ

ADIS16501

The electrical interface (J1) on each breakout board comes from

a dual row, 2 mm pitch, 16-pin interface, which supports stand-

ard ribbon cabling (1 mm pitch). Table 135 provides the J1 pin

assignments, which support direct connection with an embedded

processor board using standard ribbon cables. Although each case

may present its own set of sensitivities (such as electromagnetic

interference (EMI)), these boards can typically support reliable

communication over ribbon cables up to 20 cm in length.

Table 135. J1 Pin Assignments, Breakout Board

J1 Pin Number

Signal

Function

RST

Reset

SCLK

SPI

DOUT

SPI

No connect

DIN

SPI

GND

Ground

GND

Ground

GND

Ground

VDD

Power, 3.3 V

VDD

Power, 3.3 V

VDD

Power, 3.3 V

Data ready

SYNC

Input clock

No connect

Figure 64 provides a top view of the breakout board, including

dimensional locations for all the key mechanical features, such as

the mounting holes and the 16-pin header. Figure 65 provides an

electrical schematic for this breakout board. For additional informa-

tion, refer to the ADIS1650x-x/PCBZ Breakout Board Wiki Guide.

PC-Based Evaluation, EVAL-ADIS2

In addition to supporting quick prototype connections between

the ADIS16501 and an embedded processing system, J1 on the

breakout boards also connects directly to J1 on the EVAL-ADIS2

evaluation system. When used with the IMU Evaluation Software

for the EVAL-ADISX Platforms, the EVAL-ADIS2 provides a simple,

functional test platform that allows users to configure and collect

data from the ADIS16501 IMUs.

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