Maxim RRFP1A/T Manual de usuario descargar pdf (Pagina 14)

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

World-Band Transceiver ICs

Table 3. Receiver Baseband VGA Gain

Step Control

BIT GAIN STEP (typ)

B1 2dB

B2 4dB

B3 8dB

B4 16dB

B5 32dB

Table 4. Tx VGA Gain Control Settings

NUMBER B6:B1

OUTPUT SIGNAL POWER

63 111111 Max

62 111110 Max - 0.5dB

61 111101 Max - 1.0dB

:: :

49 110001 Max - 7dB

48 110000 Max - 7.5dB

47 101111 Max - 8dB

46 101110 Max - 8dB

45 101101 Max - 9dB

44 101100 Max - 9dB

:: :

5 000101 Max - 29dB

4 000100 Max - 29dB

3 000011 Max - 30dB

2 000010 Max - 30dB

1 000001 Max - 30dB

0 000000 Max - 30dB

SCLK

POWER SUPPLY

XTAL-OSC

SHUTDOWN

MODE

STANDBY

MODE

DIN

SHUTDOWN

SCLK (CLOCK)

DIN (DATA)

TXENA

RXENA

PABIAS

RECEIVE

MODE

TRANSMIT

MODE

TRANSMITTER ON

RECEIVER ON

PA BIAS D/A

PA ENABLE

(DRIVES RF T/R SWITCH)

(DRIVES RF T/R SWITCH AND PA ON/OFF)

(DRIVES POWER RAMP CONTROL)

3-WIRE SERIAL INTERFACE AVAILABLE

POWER

SPI:

PROGRAM 2.4GHz OR 5GHz MODE, CHANNEL FREQUENCY, PA BIAS,

TRANSMITTER LINEARITY, RECEIVER RSSI OPERATION, CALIBRATION MODE, ETC.

MAC SPI MAC

0 TO 7µs

SHDN

CS (SELECT)

MAX2828/MAX2829

Figure 1. System Timing Diagram

MAX2828/MAX2829

Maxim Integrated

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 38 39

MAX2828/MAX2829 1

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