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CC1021 bảng dữ liệu(PDF) 77 Page - Texas Instruments

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tên linh kiện CC1021
Giải thích chi tiết về linh kiện  Single Chip Low Power RF Transceiver for Narrowband Systems
PDF  94 Pages
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nhà sản xuất  TI [Texas Instruments]
Trang chủ  http://www.ti.com
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CC1021 bảng dữ liệu(HTML) 77 Page - Texas Instruments

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CC1021
SWRS045C
Page 77 of 87
FRONTEND Register (16h)
REGISTER
NAME
Default
value
Active
Description
FRONTEND[7:6]
LNAMIX_CURRENT[1:0]
2
-
Controls current in LNA, LNA2 and mixer
Recommended setting: LNAMIX_CURRENT=1
FRONTEND[5:4]
LNA_CURRENT[1:0]
1
-
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
0
-
Controls current in the mixer
Recommended setting:
MIX_CURRENT=1 at 402-470 MHz,
MIX_CURRENT=0 at 804-960 MHz..
FRONTEND[2]
LNA2_CURRENT
0
-
Controls current in LNA 2
Recommended settings:
LNA2_CURRENT=0 at 402-470 MHz,
LNA2_CURRENT=1 at 804-960 MHz.
FRONTEND[1]
SDC_CURRENT
0
-
Controls current in the single-to-diff. converter
Recommended settings:
SDC_CURRENT=0 at 402-470 MHz,
SDC_CURRENT=1 at 804-960 MHz.
FRONTEND[0]
LNAMIX_BIAS
1
-
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.



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