LMX2572LP datasheet(5/83 Pages) TI2

5 / 83 page

LMX2572LP

www.ti.com

SNAS764 – MAY 2018

Product Folder Links: LMX2572LP

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(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

6.4 Thermal Information

THERMAL METRIC(1)

LMX2572LP

UNIT

RHA (VQFN)

40 PINS

RθJA

Junction-to-ambient thermal resistance

25.5

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

14.4

°C/W

RθJB

Junction-to-board thermal resistance

°C/W

ΨJT

Junction-to-top characterization parameter

0.2

°C/W

ΨJB

Junction-to-board characterization parameter

7.9

°C/W

RθJC(bot)

Junction-to-case (bottom) thermal resistance

1.2

°C/W

(1)

ICP = 2.5 mA; fVCO = 3.2 GHz; fOUT = 400 MHz; POUT = −3 dBm; OSC_2X = 1; MULT = 1; one RF output.

(2)

ICP = 2.5 mA; fVCO = 3.2 GHz; fOUT = 400 MHz; POUT = −3 dBm; OSC_2X = 0; MULT = 1; one RF output.

(3)

See OSCin Configuration for definition of OSCin input voltage.

(4)

For lower VCO frequencies, the N-divider minimum value can limit the phase detector frequency.

(5)

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_Total = 10*log[10(PLL_Flat/10)+10(PLL_Flicker/10)]; PLL_Flat = PN1 Hz + 20*log(N) + 10*log(fPD); PLL_Flicker

= PN10 kHz - 10*log(Offset/10 kHz) + 20*log(fOUT/1 GHz)

(6)

fOSCin = 200 MHz; fPD = 100 MHz; fVCO = 6 GHz

(7)

fOSCin = 200 MHz; fPD = 100 MHz; fVCO = 6.001 GHz; Fractional denominator = 1000.

6.5 Electrical Characteristics

3.0 V

≤ VCC ≤ 3.5 V, –40°C ≤ TA ≤ 85°C. Typical values are at VCC = 3.3 V, 25°C (unless otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

POWER SUPPLY

VCC

Supply voltage

3.3

3.5

ICC

Supply current

fOSCin = 20 MHz; fPD = 40 MHz

(1)

fOSCin = 100 MHz; fPD = 100 MHz

(2)

74.5

ICCPD

Power down current

2.5

INPUT SIGNAL PATH

fOSCin

OSCin input frequency

OSC_2X = 0 (Doubler bypassed)

250

MHz

OSC_2X = 1 (Doubler enabled)

125

VOSCin

OSCin input voltage(3)

Single-ended input buffer

0.3

3.6

Differential input buffer

0.15

fMULTin

Multiplier input frequency

MULT

≥ 3

MHz

fMULTout

Multiplier output frequency

150

PLL

fPD

Phase detector frequency(4)

Integer channel

0.25

250

MHz

1st and 2nd order modulator

200

3rd order modulator

160

4th order modulator

120

ICPout

Charge pump current

CPG = 1

625

µA

CPG = 2

1250

CPG = 3

1875

···

…

CPG = 15

6875

PNPLL_1/f

Normalized PLL 1/f noise(5)

–123.5

dBc/Hz

PNPLL_Flat

Normalized PLL noise floor(5)

Integer channel(6)

–232

Fractional channel(7)

–232

VCO

fVCO

VCO frequency

3200

6400

MHz

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