LMX2486 datasheet(32/48 Pages) TI2

32 / 48 page

LMX2486

SNAS324B – JANUARY 2006 – REVISED JANUARY 2016

www.ti.com

8.6.5.1 MUX[3:0] Frequency Out and Lock Detect MUX

These bits determine the output state of the Ftest/LD pin.

Table 30. MUX/Lock Detect Programming Settings

MUX[3:0]

OUTPUT TYPE

OUTPUT DESCRIPTION

High Impedance

Disabled

Push-Pull

General-purpose output, Logical “High” State

Push-Pull

General-purpose output, Logical “Low” State

Push-Pull

RF and IF Digital Lock Detect

Push-Pull

RF Digital Lock Detect

Push-Pull

IF Digital Lock Detect

Open-Drain

RF and IF Analog Lock Detect

Open-Drain

RF Analog Lock Detect

Open-Drain

IF Analog Lock Detect

Push-Pull

RF and IF Analog Lock Detect

Push-Pull

RF Analog Lock Detect

Push-Pull

IF Analog Lock Detect

Push-Pull

IF R Divider divided by 2

Push-Pull

IF N Divider divided by 2

Push-Pull

RF R Divider divided by 2

Push-Pull

RF N Divider divided by 2

8.6.5.2 IF_P -- IF Prescaler

When this bit is set to 0, the 8/9 prescaler is used. Otherwise the 16/17 prescaler is used.

Table 31. IF PLL Programmable Settings and Frequencies

IF_P

IF PRESCALER

MAXIMUM FREQUENCY

8/9

2300 MHz

16/17

3000 MHz

8.6.5.3 RF_CPP -- RF PLL Charge Pump Polarity

Table 32. RF PLL Charge Pump Polarity

RF_CPP

RF CHARGE PUMP POLARITY

Negative

Positive (Default)

8.6.5.4 IF_CPP -- IF PLL Charge Pump Polarity

For a positive phase detector polarity, which is normally the case, set this bit to 1. Otherwise set this bit for a

negative phase detector polarity.

Table 33. IF PLL Charge Pump Polarity

IF_CPP

IF CHARGE PUMP POLARITY

Negative

Positive

Submit Documentation Feedback

Product Folder Links: LMX2486

LMX2486 Datasheet(PDF) 32 Page - Texas Instruments

LMX2486 Datasheet(HTML) 32 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

Datasheet Download

Link URL