LMX2433 datasheet(7/53 Pages) TI1

7 / 53 page

LMX2430, LMX2433, LMX2434

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SNAS187D – FEBRUARY 2003 – REVISED JANUARY 2016

Electrical Characteristics (continued)

VCC = EN = 2.5 V, −40°C ≤ TA ≤ +85°C, unless otherwise specified

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

PHASE NOISE CHARACTERISTICS

TCXO Reference Source

RF synthesizer normalized phase noise

dBc/

LNRF(f)

RF_CPG Bit = 1

–219

contribution(6)

IF_PD Bit = 1

TCXO Reference Source

IF synthesizer normalized phase noise

dBc/

LNIF(f)

IF_CPG Bit = 1

–214

contribution(6)

RF_PD Bit = 1

fFinRF = 2750 MHz

f = 10-kHz offset

fCOMPRF = 1 MHz

Loop Bandwidth = 100 kHz

NRF = 2750

dBc/

LMX2430

–90.3

fOSCin = 10 MHz

vOSCin = 1 VPP

RF_CPG Bit = 1

IF_PD Bit = 1

TA = 25

oC(7)

fFinRF = 3200 MHz

f = 10-kHz offset

fCOMPRF = 1 MHz

Loop Bandwidth = 100 kHz

RF synthesizer single-

NRF = 3200

dBc/

LRF(f)

side band phase noise

LMX2433

–88.9

fOSCin = 10 MHz

measured

vOSCin = 1 VPP

RF_CPG Bit = 1

IF_PD Bit = 1

TA = 25°C

(7)

fFinRF = 4700 MHz

f = 10-kHz offset

fCOMPRF = 1 MHz

Loop Bandwidth = 100 kHz

NRF = 4700

dBc/

LMX2434

–85.6

fOSCin = 10 MHz

vOSCin = 1 VPP

RF_CPG Bit = 1

IF_PD Bit = 1

TA = 25°C

(7)

(6)

Normalized Phase Noise Contribution is defined as LN(f) = L(f) − 20 log (N) − 10 log (fCOMP), where L(f) is defined as the single side

band phase noise measured at an offset frequency, f, in a 1-Hz bandwidth. The offset frequency, f, must be chosen sufficiently smaller

than the loop bandwidth of the PLL, yet large enough to avoid substantial phase noise contribution from the reference source. N is the

value selected for the feedback divider and fCOMP is the RF/IF phase and frequency detector comparison frequency.

(7)

The synthesizer phase noise is measured with the LMX2430PW/LMX2430NPE evaluation boards and the HP8566B Spectrum Analyzer.

7.5 Timing Requirements

See

(1)

MIN

NOM

MAX

UNIT

MICROWIRE INTERFACE

tCS

DATA to CLK set-up time

tCH

DATA to CLK hold time

tCWH

CLK pulse width HIGH

tCWL

CLK pulse width LOW

tES

CLK to LE set-up time

tEW

LE pulse width

(1)

Refer to LMX243x Serial Data Input Timing figure.

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