CC1020-RTR1 datasheet(74/95 Pages) TI1

74 / 95 page

CC1020

SWRS046H – NOVEMBER 2006 – REVISED MARCH 2015

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Table 5-40. FRONTEND Register (16h)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

FRONTEND[7:6]

LNAMIX_CURRENT[1:0]

—

Controls current in LNA, LNA2 and mixer

Recommended setting: LNAMIX_CURRENT=1

FRONTEND[5:4]

LNA_CURRENT[1:0]

—

Controls current in the LNA

Recommended setting: LNA_CURRENT=3.

Can be lowered to save power at the expense of reduced

sensitivity.

FRONTEND[3]

MIX_CURRENT

—

Controls current in the mixer

Recommended setting:

MIX_CURRENT=1 at 426 to 464 MHz,

MIX_CURRENT=0 at 852 to 928 MHz.

FRONTEND[2]

LNA2_CURRENT

—

Controls current in LNA 2

Recommended settings:

LNA2_CURRENT=0 at 426 to 464 MHz,

LNA2_CURRENT=1 at 852 to 928 MHz.

FRONTEND[1]

SDC_CURRENT

—

Controls current in the single-to-diff. Converter

Recommended settings:

SDC_CURRENT=0 at 426 to 464 MHz,

SDC_CURRENT=1 at 852 to 928 MHz.

FRONTEND[0]

LNAMIX_BIAS

—

Controls how front-end bias currents are generated

0: Constant current biasing

1: Constant Gm × R biasing (reduces gain variation)

Recommended setting: LNAMIX_BIAS=0.

Detailed Description

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