ADIS16136

Data Sheet

Rev. A | Page 18 of 20

APPLICATIONS INFORMATION

POWER SUPPLY CONSIDERATIONS

The ADIS16136 includes 12 µF of capacitance across the VDD

and GND pins. This capacitance presents low input impedance

for power supplies that have fast rise times. The internal power

regulator waits for a valid input supply voltage, and then goes

through a start-up process that draws an elevated current

(~400 mA) for approximately 1.5 ms. This transient current

occurs approximately 125 ms after VDD reaches a valid level.

This regulation circuit also provides a constant power load,

which results in a load that has a negative dynamic resistance.

Figure 21 provides a graphical relationship between the supply

current and voltage for systems that need to account for this

type of load when designing supply feedback loops.

Figure 21. Supply Current vs Supply Voltage

PROTOTYPE INTERFACE BOARD

The ADIS16136/PCBZ includes one ADIS16136AMLZ, one

interface PCB, and four M2 × 18 machine screws. The interface

PCB provides larger connectors than the ADIS16136AMLZ for

simpler prototyping, four tapped M2 holes for attachment of the

ADIS16136AMLZ, and four holes (machine screw size M2.5 or

No. 4) for mounting the ADIS16136AMLZ to a solid structure.

J1 and J2 are dual row, 2 mm (pitch) connectors that work with

a number of ribbon cable systems, including 3M Part Number

152212-0100-GB (ribbon crimp connector) and 3M Part Number

3625/12 (ribbon cable).

Figure 22 provides the top level view of the interface board.

Install the ADIS16136AMLZ onto this board using the silk

pattern as an orientation guide. Figure 23 provides the pin

assignments for J1 and J2. The pin descriptions match those

listed in Table 5. The ADIS16136 does not require external

capacitors for normal operation; therefore, the interface printed

circuit board (PCB) does not use the C1 and C2 pads.

Figure 22. Physical Diagram for the ADIS16136/PCBZ

Figure 23. J1 Pin Assignments

105

110

115

120

125

4.75

4.80

4.85

4.90

4.95

5.00

5.05

5.10

5.15

5.20

5.25

SUPPLY VOLTAGE (V)

–40˚C

+25˚C

+85˚C

ADIS16136

MOUNTING

HOLES

RST

SCLK

DOUT

DIN

GND

VDD

DIO2

DIO4

VDD

CS1

CS2

GND

GND

VDD

DIO1

DIO3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16