參數(shù)資料
型號(hào)： CC2420
廠商： Electronic Theatre Controls, Inc.
英文描述： 2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver
中文描述： 2.4 GHz IEEE 802.15.4標(biāo)準(zhǔn)/ ZigBee功能的RF收發(fā)器
文件頁(yè)數(shù)： 50/87頁(yè)
文件大小： 1418K
代理商： CC2420
SmartRF
CC2420
VCO and PLL Self-Calibration
VCO
The VCO is completely integrated and
operates at 4800 – 4966 MHz. The VCO
frequency is divided by 2 to generate
frequencies in the desired band (2400-
2483.5 MHz).
PLL self-calibration
The VCO's characteristics will vary with
temperature, changes in supply voltages,
and the desired operating frequency.
In order to ensure reliable operation the
VCO’s bias current and tuning range are
automatically calibrated every time the RX
mode or TX mode is enabled, i.e. in the
RX_CALIBRATE, TX_CALIBRATE and
TX_ACK_CALIBRATE control states in
Figure 24 on page 43.
Output Power Programming
The RF output power of the device is
programmable and is controlled by the
TXCTRL.PA_LEVEL
register. Table 9
shows the output power for different
settings,
programming of the
TXCTRL
control
register. The typical current consumption
is also shown.
including
the
complete
PA_LEVEL
TXCTRL
register
Output Power [dBm]
Current Consumption [mA]
31
0xA0FF
0
17.4
27
0xA0FB
-1
16.5
23
0xA0F7
-3
15.2
19
0xA0F3
-5
13.9
15
0xA0EF
-7
12.5
11
0xA0EB
-10
11.2
7
0xA0E7
-15
9.9
3
0xA0E3
-25
8.5
Table 9. Output power settings and typical current consumption @ 2.45 GHz
Voltage Regulator
CC2420
includes a low drop-out voltage
regulator. This is used to provide a 1.8 V
power supply to the
CC2420
power
supplies. The voltage regulator should not
be used to provide power to other circuits
because
of
limited
capability and noise considerations.
power
sourcing
The voltage regulator input pin
VREG_IN
is connected to the unregulated 2.1 to 3.6
V power supply. The voltage regulator is
enabled / disabled using the active high
voltage regulator enable pin
VREG_EN
.
The regulated 1.8 V voltage output is
available on the
VREG_OUT
pin. A
simplified
schematic
regulator is shown in Figure 27.
of
the
voltage
The voltage regulator requires external
components
as
described
Application Circuit section on page 18.
in
the
When disabling the voltage regulator, note
that register and RAM programming will
be lost as leakage current reduces the
output voltage on the
VREG_OUT
pin below
Chipcon AS
SmartRF
CC2420 Preliminary Datasheet (rev 1.2), 2004-06-09
Page 50 of 87
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CC2420DBK 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 DEMO KIT 2 DEMO BOARDS RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評(píng)估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓:
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CC2420EMK 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 EVALUATION KT (2)PCBs & (2)ANTENNA RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評(píng)估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓:
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