LMX2541 datasheet(7/40 Pages) NSC

7 / 40 page

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VCO Specifications

VCO

Internal VCO Frequency Range

Mode = Full Chip Mode

This is the frequency before the

VCO divider.

2060E

1990

2240

MHz

2380E

2200

2530

2690E

2490

2865

3030E

2810

3230

3320E

3130

3600

3740E

3480

4000

ΔT

Maximum Allowable

Temperature Drift for

Continuous Lock

(Note 6),(Note 8)

125

°C

RFout

RF Output Power

Maximum Frequency

Default Power Mode

VCO_DIV=1

2060E

3.5

dBm

2380E

2.8

2690E

1.6

3030E

1.2

3320E

0.2

3740E

- 0.3

ΔP

RFout

Change in Output Power

(Note 6)

Fixed Temperature with 100 MHz frequency change at

the output

Fixed frequency with a change over the entire

temperature range

0.5

Vtune

Fine Tuning Sensitivity

The lower number in the range

applies when the VCO is at its

lowest frequency and the higher

number applies when the VCO is

at its highest frequency. A linear

approximation can be used for

frequencies between these two

cases.

2060E

13 - 23

MHz/V

2380E

16 - 30

2690E

17 - 32

3030E

20 - 37

3320E

21 - 37

3740E

27 - 42

RFout

Second Harmonic

Default Power

Mode

(Note 5)

50 Ω Load

VCO_DIV=1

2060E

-20

-15

dBc

2380E

2690E

3030E

3320E

3740E

VCO_DIV=3

2060E

-20

-15

2380E

2690E

3030E

3320E

3740E

PSH

VCO

VCO Frequency Pushing

VregVCO = 4.7 µF,Open Loop

600

kHz/V

PULL

VCO Frequency Pulling

VSWR 1.7 to 1

(6 dB Pad)

VCO_DIV = 1

±800

kHz

VCO_DIV > 1

±60

σΦ

RMS Phase Error

Integration Bandwidth

= 100 Hz to 20 MHz

Middle VCO Frequency

100 MHz Wenzel Crystal

Reference

Integer Mode

Optimized Loop Bandwidth

2060E

1.6

mRad

2380E

1.8

2690E

2.1

3030E

2.1

3320E

2.3

3740E

2.6

LMX2541 Datasheet(PDF) 7 Page - National Semiconductor (TI)

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