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參數(shù)資料
| 型號： | CC2420DK |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | LC2MOS 5 O RON SPST Switch; Package: PDIP; No of Pins: 16; Temperature Range: Industrial |
| 中文描述： | 2.4 GHz IEEE 802.15.4標(biāo)準(zhǔn)/ ZigBee功能的RF收發(fā)器 |
| 文件頁數(shù)： | 53/87頁 |
| 文件大小： | 1418K |
| 代理商： | CC2420DK |
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SmartRF
CC2420
operation of the crystal. In addition,
loading capacitors (C
381
and C
391
) for the
crystal are required. The loading capacitor
values
depend
on
capacitance, C
L
, specified for the crystal.
The total load capacitance seen between
the crystal terminals should equal C
L
for
the crystal to oscillate at the specified
frequency.
the
total
load
parasitic
L
C
C
C
C
+
+
=
391
381
1
1
1
The parasitic capacitance is constituted by
pin input capacitance and PCB stray
capacitance.
The
capacitance is typically 2 pF - 5 pF. A
total
parasitic
trimming capacitor may be placed across
C
381
for initial tuning if necessary.
The crystal oscillator circuit is shown in
Figure 29. Typical component values for
different values of C
L
are given in Table
10.
The
regulated. This means that a high current
is used to start up the oscillations. When
the amplitude builds up, the current is
reduced to what is necessary to maintain
a stable oscillation. This ensures a fast
start-up and keeps the drive level to a
minimum. The ESR of the crystal must be
within the specification in order to ensure
a reliable start-up (see the Electrical
Specifications section).
crystal
oscillator
is
amplitude
C381
C391
XTAL
XOSC16_Q1
XOSC16_Q2
Figure 29. Crystal oscillator circuit
Item
C
L
= 16 pF
C381
27 pF
C391
27 pF
Table 10. Crystal oscillator component values
Input / Output Matching
The RF input / output is differential (
RF_N
and
RF_P
). In addition there is supply
switch output pin (
TXRX_SWITCH
) that
must have an external DC path to
RF_N
and
RF_P
.
In RX mode the
TXRX_SWITCH
pin is at
ground and will bias the LNA. In TX mode
the
TXRX_SWITCH
pin is at supply rail
voltage and will properly bias the internal
PA.
The RF output and DC bias can be done
using different topologies. Some are
shown in Figure 3 and Figure 4.
Component values are given in Table 2.
Using a differential antenna, no balun is
required.
If a single ended output is required (for a
single ended connector or a single ended
antenna), a balun should be used for
optimum performance.
Chipcon AS
SmartRF
CC2420 Preliminary Datasheet (rev 1.2), 2004-06-09
Page 53 of 87
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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 工具用于評估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓: |
| CC2420RGZ | 制造商:Texas Instruments 功能描述:IC, RF TXRX, 2400MHZ TO 2483.5MHZ, QLP48; Frequency Min:2.4GHz; Frequency Max:2.4835GHz; Modulation Type:O-QPSK; Receiving Current:18.8mA; Transmitting Current:17.4mA; RF IC Case Style:QLP; No. of Pins:48; Supply Voltage Min:1.6V |
| CC2420RGZR | 制造商:Texas Instruments 功能描述:IC, RF TXRX, 2400MHZ TO 2483.5MHZ, QLP48; Frequency Min:2.4GHz; Frequency Max:2.4835GHz; Modulation Type:O-QPSK; Data Rate:250Kbps; Receiving Current:18.8mA; RF IC Case Style:QLP; No. of Pins:48; Supply Voltage Min:1.6V ;RoHS Compliant: Yes |
| CC2420RGZT | 制造商:Texas Instruments 功能描述:IC RF TXRX ZIGBEE 2.4GHZ 48VQFN |
| CC2420-RTB1 | 功能描述:射頻收發(fā)器 Sgl-Chip 2.4GHz IEEE & ZigBee Ready RF RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
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