LMX2492, LMX2492-Q1

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SNAS624A – MARCH 2014 – REVISED JUNE 2014

7.5 Electrical Characteristics

(3.15 V

≤ Vcc ≤ 3.45 V. Vcc ≤Vcp ≤5.25 V. Typical values are at Vcc = Vcp = 3.3 V, 25 °C.

-40°C

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

Fpd = 10 MHz

45

All Vcc Pins

Fpd = 100 MHz

50

Fpd = 200 MHz

55

Icc

Current Consumption

Kpd = 0.1 mA

2

mA

Vcp Pin

Kpd = 1.6 mA

10

Kpd = 3.1 mA

19

IccPD

Current

POWERDOWN

3

OSC_DIFFR=0, Doubler Disabled

10

600

OSC_DIFFR=0, Doubler Enabled

10

300

Frequency for OSCin

MHz

terminal

OSC_DIFFR=1, Doubler Disabled

10

1200

OSC_DIFFR=1, Doubler Enabled

10

600

0.5

Vcc-0.5

Vpp

500

14000

MHz

Power for Fin Pin

Single-Ended Operation

-5

5

dBm

Phase Detector Frequency

200

MHz

PN1Hz

-227

dBc/Hz

Normalized PLL 1/f

Normalized to 10 kHz offset for a 1 GHz

PN10kHz

-120

dBc/Hz

carrier.

Charge Pump Leakage Tri-

10

nA

state Leakage

5 %

CPG=1X

0.1

Charge Pump Current

mA

CPG=31X

3.1

(1)

For optimal phase noise performance, higher input voltage and a slew rate of at least 3 V/ns is recommended

(2)

Tested to 13.5 GHz, Guaranteed to 14 GHz by characterization

(3)

PLL Noise Metrics are measured with a clean OSCin signal with a high slew rate using a wide loop bandwidth. The noise metrics model

the PLL noise for an infinite loop bandwidth as:

PLL_Flat = PN1Hz + 20×log(N) + 10×log(Fpd/1Hz)

PLL_Flicker = PN10kHz - 10×log(Offset/10kHz) + 20×log(Fvco/1GHz)

(4)

Charge pump mismatch varies as a function of charge pump voltage. Consult typical performance characteristics to see this variation.

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