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參數(shù)資料
| 型號(hào)： | EM2420 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 2.4 GHz IEEE 802.15.4 / ZigBee RF Transceiver |
| 中文描述： | 2.4 GHz IEEE 802.15.4標(biāo)準(zhǔn)/ ZigBee的射頻收發(fā)器 |
| 文件頁數(shù)： | 18/89頁 |
| 文件大?。?/td> | 1758K |
| 代理商： | EM2420 |
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EM2420
Ember Part Number: 120-0049-000
C
EM2420 Datasheet
Page 18 of 89
Application Circuit
Few external components are required for
the operation of the
EM2420
. A typical
application circuit is shown in Figure 3.
The external components are described in
Table 1 and typical values are given in
Table 2.
Input / output matching
The RF input/output is high impedance
and differential. The optimum differential
load for the RF port is 115+j180
.
When using an unbalanced antenna such
as a monopole, a balun should be used in
order to optimize performance. The balun
can be implemented using low-cost
discrete inductors and capacitors. The
balun consists of C61, C62, C71, C81,
L61, L62 and L72, and will match the RF
input/output to 50
, see Figure 3. L61
and L62 also provide DC biasing of the
LNA/PA input/output. An internal T/R
switch circuit is used to switch between
the LNA and the PA. See Input/output
matching section on page 55 for more
details.
If a balanced antenna such as a folded
dipole is used, the balun can be omitted. If
the antenna also provides a DC path from
TXRX_SWITCH
pin to the RF pins,
inductors are not needed for DC bias.
Figure 4 shows a typical application circuit
with differential antenna. The dipole has a
virtual ground point, hence bias is
provided without degradation in antenna
performance.
A 27 nH series inductor may be connected
to the
TXRX_SWITCH
pin to improve the
transmitted EVM, but is not necessary to
comply with the requirements in [1].
Bias resistor
The bias resistor R451 is used to set an
accurate bias current.
Crystal
An external crystal with two loading
capacitors (C381 and C391) is used for
the crystal oscillator. See page 55 for
details.
Voltage regulator
The on chip voltage regulator supplies all
1.8 V power supply inputs. C42 is required
for stability of the regulator. A series
resistor may be used to comply with the
ESR requirement.
Power supply decoupling and filtering
Proper power supply decoupling must be
used for optimum performance. The
placement and size of the decoupling
capacitors and the power supply filtering
are very important to achieve the best
performance in an application. Ember
provides a compact reference design that
should be followed very closely.
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| EM2420-RTB | 功能描述:IC RF TXRX ZIGBEE 2.4GHZ 48-QLP RoHS:是 類別:RF/IF 和 RFID >> RF 收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:30 系列:- 頻率:4.9GHz ~ 5.9GHz 數(shù)據(jù)傳輸率 - 最大:54Mbps 調(diào)制或協(xié)議:* 應(yīng)用:* 功率 - 輸出:-3dBm 靈敏度:- 電源電壓:2.7 V ~ 3.6 V 電流 - 接收:* 電流 - 傳輸:* 數(shù)據(jù)接口:PCB，表面貼裝 存儲(chǔ)容量:- 天線連接器:PCB，表面貼裝 工作溫度:-25°C ~ 85°C 封裝/外殼:68-TQFN 裸露焊盤 包裝:管件 |
| EM2420-RTR | 功能描述:IC RF TXRX ZIGBEE 2.4GHZ 48-QLP RoHS:是 類別:RF/IF 和 RFID >> RF 收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:30 系列:- 頻率:4.9GHz ~ 5.9GHz 數(shù)據(jù)傳輸率 - 最大:54Mbps 調(diào)制或協(xié)議:* 應(yīng)用:* 功率 - 輸出:-3dBm 靈敏度:- 電源電壓:2.7 V ~ 3.6 V 電流 - 接收:* 電流 - 傳輸:* 數(shù)據(jù)接口:PCB，表面貼裝 存儲(chǔ)容量:- 天線連接器:PCB，表面貼裝 工作溫度:-25°C ~ 85°C 封裝/外殼:68-TQFN 裸露焊盤 包裝:管件 |
| EM2420-STB | 功能描述:IC RF TXRX ZIGBEE 2.4GHZ 48-QLP RoHS:否 類別:RF/IF 和 RFID >> RF 收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:30 系列:- 頻率:4.9GHz ~ 5.9GHz 數(shù)據(jù)傳輸率 - 最大:54Mbps 調(diào)制或協(xié)議:* 應(yīng)用:* 功率 - 輸出:-3dBm 靈敏度:- 電源電壓:2.7 V ~ 3.6 V 電流 - 接收:* 電流 - 傳輸:* 數(shù)據(jù)接口:PCB，表面貼裝 存儲(chǔ)容量:- 天線連接器:PCB，表面貼裝 工作溫度:-25°C ~ 85°C 封裝/外殼:68-TQFN 裸露焊盤 包裝:管件 |
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