ADF4159

Data Sheet

Rev. E | Page 6 of 36

Table 3. Read Timing

Parameter

Limit at TMIN to TMAX

Unit

Description

t11

tPFD + 20

ns min

TXDATA setup time

t2

20

ns min

CLK setup time to data (on MUXOUT)

t3

25

ns min

CLK high duration

t4

25

ns min

CLK low duration

t5

10

ns min

CLK to LE setup time

1 tPFD is the period of the PFD frequency; for example, if the PFD frequency is 50 MHz, tPFD = 20 ns.

Read Timing Diagram

CLK

t4

t3

MUXOUT

DB36

DB35

DB1

DB2

DB0

TXDATA

t1

t2

LE

t5

NOTES

1. LE SHOULD BE KEPT HIGH DURING READBACK.

Figure 3. Read Timing Diagram

TO MUXOUT

PIN

CL

10pF

500µA

IOL

100µA

IOH

0.9V

Figure 4. Load Circuit for MUXOUT Timing, CL = 10 pF