Maxim RRFP1A/T Manual de usuario descargar pdf (Pagina 13)

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

World-Band Transceiver ICs

AC ELECTRICAL CHARACTERISTICS—Timing (continued)

(MAX2828/MAX2829 evaluation kits: V

= 2.7V, f

= 2.437GHz (802.11g) or f

= 5.25GHz (802.11a), f

REFOSC

= 40MHz, SHDN =

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

BIAS

= 11kΩ, T

= +25°C, unless otherwise noted.)

PARAMETER CONDITIONS

MIN

TYP

MAX

UNITS

3-WIRE SERIAL INTERFACE TIMING (SEE FIGURE 2)

SCLK-Rising-Edge to CS-Falling-

Edge Wait Time, t

CSO

6ns

Falling Edge of CS to Rising

Edge of First SCLK Time, t

CSS

6ns

DIN-to-SCLK Setup Time, t

6ns

DIN-to-SCLK Hold Time, t

6ns

SCLK Pulse-Width High, t

6ns

SCLK Pulse-Width Low, t

6ns

Last Rising Edge of SCLK to

Rising Edge of CS or Clock to

Load Enable Setup Time, t

CSH

6ns

CS High Pulse Width, t

CSW

20 ns

Time Between the Rising Edge of

CS and the Next Rising Edge of

SCLK, t

CS1

6ns

Clock Frequency, f

CLK

40 MHz

Rise Time, t

2ns

Fall Time, t

2ns

Note 1: Devices are production tested at +85°C only. Min and max limits at temperatures other than +85°C are guaranteed by

design and characterization.

Note 2: Register settings for MIMO mode. A3:A0 = 0101 and A3:A0 = 0010, D13 = 1.

Note 3: The expected part-to-part variation of the RF gain step is

±1dB.

Note 4: Tx I/Q inputs = 100mV

RMS

. Set Tx VGA gain to max.

Table 1. Receiver Front-End Gain-Control

Settings

B7 B6 GAIN

1 1 High

1 0 Medium

0 X Low

Table 2. Receiver Baseband VGA Gain

Settings

B5:B1 GAIN

11111 Max

11110 Max - 2dB

11101 Max - 4dB

00000 Min

MAX2828/MAX2829

Maxim Integrated

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 38 39

MAX2828/MAX2829 1

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Maxim RRFP1A/T Manual de usuario Pagina 13

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