MAX2837(2008) データシートの表示（PDF） - Maxim Integrated

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MAX2837
(Rev.:2008)

2.3GHz to 2.7GHz Wireless Broadband RF Transceiver

Maxim Integrated 

2.3GHz to 2.7GHz Wireless

Broadband RF Transceiver

AC ELECTRICAL CHARACTERISTICS—FREQUENCY SYNTHESIS

(MAX2837 evaluation kit: VCC_ = 2.8V, fLO = 2.5GHz, fREF = 40MHz, ENABLE = CS = high, SCLK = DIN = low, PLL loop bandwidth =

120kHz, TA = +25°C, unless otherwise noted.) (Note 1)

PARAMETER

FREQUENCY SYNTHESIZER

RF Channel Center Frequency

CONDITIONS

MIN

2.3

Channel Center Frequency

Programming Minimum Step Size

Charge-Pump Comparison

Frequency

11

Reference Frequency Range

11

Reference Frequency Input

AC-coupled to XTAL2 pin

800

Levels

Reference Frequency Input

Impedance (R || C)

Resistance (XTAL2 pin)

Capacitance (XTAL2 pin)

Programmable Reference Divider

Values

1

Closed-Loop Integrated Phase

Noise

Loop BW = 120kHz; integrate phase noise from 200Hz

to 5MHz, charge-pump comparison frequency = 40MHz

Charge-Pump Output Current

Close-In Spur Level

Reference Spur Level

On each differential side

fOFFSET = 0 to 1.8MHz

fOFFSET = 1.8MHz to 7MHz

fOFFSET > 7MHz

Turnaround LO Frequency Error

Relative to steady state; measured 35μs after Tx-Rx or

Rx-Tx switching instant, and 4μs after any receiver

gain changes

TYP MAX UNITS

2.7

GHz

20

Hz

40

MHz

40

80

MHz

mVP-P

10

k

1

pF

2

4

-39

dBc

1.6

mA

-40

-70

dBc

-80

-85

dBc

±50

Hz

Temperature Range over Which

VCO Maintains Lock

Relative to the ambient temperature TA, as long as the

VCO lock temperature range is within operating

temperature range

TA ±40

°C

Reference Output Clock Divider

Values

Output Clock Drive Level

Output Clock Minimum Load

Impedance (R || C)

20MHz output, 1x drive setting

Resistance

Capacitance

1

2

1.5

VP-P

10

k

2

pF

_______________________________________________________________________________________ 7

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