Maxim RRFP1A/T Manual de usuario descargar pdf (Pagina 11)

Single-/Dual-Band 802.11a/b/g

World-Band Transceiver ICs

AC ELECTRICAL CHARACTERISTICS—Frequency Synthesis

(MAX2828/MAX2829 evaluation kits: V

CC

= +2.7V, f

RF

= 2.437GHz (802.11g) or f

RF

= 5.25GHz (802.11a), f

REFOSC

= 40MHz, SHDN =

CS = high, SCLK = DIN = low, PLL loop bandwidth = 150kHz, R

BIAS

= 11kΩ, T

A

= +25°C, unless otherwise noted.)

PARAMETER CONDITIONS

MIN TYP MAX

UNITS

FREQUENCY SYNTHESIZER

802.11g mode

2412 2500

802.11a low-band mode

4900 5350

RF Channel Center Frequency

802.11a high-band mode

5470 5875

MHz

Charge-Pump Comparison

Frequency

20

MHz

f

REFOSC

Input Frequency 20 44

MHz

Reference-Divider Ratio 14

f

REFOSC

Input Levels AC-coupled

800

mV

P-P

f

REFOSC

Input Impedance 10 kΩ

f

OFFSET

= 1kHz -87

f

OFFSET

= 10kHz

-103

f

OFFSET

= 100kHz -99

f

OFFSET

= 1MHz

-112

802.11g

f

OFFSET

= 10MHz

-125

f

OFFSET

= 1kHz -84

f

OFFSET

= 10kHz -95

f

OFFSET

= 100kHz -92

f

OFFSET

= 1MHz

-108

Closed-Loop Phase Noise

802.11a

f

OFFSET

= 10MHz

-124

dBc/Hz

802.11g 0.6

Closed-Loop Integrated Phase

Noise

RMS phase jitter,

integrate from 10kHz

to 10MHz offset

802.11a 1

d eg r ees

Charge-Pump Output Current 4mA

Charge-Pump Output Voltage >70% of I

CP

0.5

V

CC

- 0.5V

V

802.11g -65

Reference Spurs 20MHz offset

802.11a -58

dBc

VOLTAGE-CONTROLLED OSCILLATOR

VCO Tuning Voltage Range 0.4 2.3 V

V

TUNE

= 0.4V

135

802.11g

V

TUNE

= 2.3V 62

V

TUNE

= 0.3V

324

Low band

V

TUNE

= 2.2V

167

V

TUNE

= 0.3V

330

LO Tuning Gain

802.11a

High band

V

TUNE

= 2.2V

175

MHz/V

MAX2828/MAX2829

Maxim Integrated

11

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 38 39

MAX2828/MAX2829 1

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