MAX2837 Просмотр технического описания (PDF) - Maxim Integrated

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производитель

MAX2837

2.3GHz to 2.7GHz Wireless Broadband RF Transceiver

Maxim Integrated 

MAX2837

2.3GHz to 2.7GHz Wireless

Broadband RF Transceiver

Table 3. Address 0, RXRF Register 1 (Default = 150HEX)

DATA BITS

DEFAULT

DESCRIPTION

Sets the center frequency of LNA output LC tank.

D9

0

0 = Band 2.3~2.5GHz

1 = Band 2.5~2.7GHz

D8:D3

D2

D1

D0

101010

0

0

0

Set to recommended value.

Enables RX quadrature generation, except for shut down mode.

1 = Enable

0 = Disabled

Enables RX Mixer, except for shut down mode.

1 = Enable

0 = Disabled

Enables LNA, except for shut down mode.

1 = Enable

0 = Disabled

Table 4. Address 1, RXRF Register 2 (Default = 002HEX)

DATA BITS

DEFAULT

DESCRIPTION

D9:D5

00000

RX LO IQ calibration SPI control. Active when Address 8 D<9> = 1. Serves as trim word of

fuse links independent of Address 8 D<9>.

00000 = +4.0° phase error (default) (Q lags I signal by 94°).

…

01111 = 0.0° phase error.

…

11111 = -4.0° deg phase error (Q lags I signal by 86°).

D4:D2

Adjusts the LNA gain by SPI. Active when Address 8 D<0> = 1.

000 = MAX gain (default)

100 = MAX-8dB

000

010 = MAX-16dB

110 = MAX-24dB

011 = MAX-32dB

111 = MAX-40dB

LNA output tank de_Q resistance tuning in ‘Down’ process.

D1

1

0 = Nominal

1 = Increase ~2dB gain in down process (default)

LNA output LC tank center frequency tuning in ‘Down’ process.

D0

0

0 = Nominal (default)

1 = Down process

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