参数资料
型号: AT86RF230-ZU
厂商: ATMEL CORP
元件分类: 网络接口
英文描述: ZigBee/IEEE 802.15.4-Transceiver
中文描述: DATACOM, INTERFACE CIRCUIT, PQCC32
封装: 5 X 5 MM, 0.50 MM PITCH, GREEN, PLASTIC, MO-220VHHD-6, QFN-32
文件页数: 46/50页
文件大小: 445K
代理商: AT86RF230-ZU
46
AT86RF230
5131A-ZIGB-06/14/06
LNA
PA
RFP
RFN
RXTX
0.9V
TX
RX
CM
Feedback
M0
Figure 10-1.
Simplified RF Front-end Schematic
A simplified schematic of the RF front end is shown in
Figure 10-1
. RF port DC values depend on the operating
mode. In TRX_OFF mode, the RF pins are pulled to ground, preventing a floating voltage larger than 1.8V which is
not allowed for the internal circuitry. In receive mode, the RF input provides a low-impedance path to ground when
transistor M0 pulls the inductor center tap to ground. A DC voltage drop of 20 mV across the on-chip inductor can
be measured at the RF pins. In transmit mode, a regulation loop provides a common-mode voltage of 0.9V.
Transistor M0 is off, allowing the PA to set the common-mode voltage. The common-mode capacitance at each pin
to ground is limited to < 30 pF to ensure the stability of this common-mode feedback loop.
10.5. Digital Pins
Pulling resistors are connected to all digital input pins in transceiver state P_ON. Table 10-3 summarizes the pull-
up and pull-down configuration.
In all other states there is no pull-up or pull-down resistor connected to any of the digital input pins.
Pin
H = pull-up, L = pull-down
RST
H
SEL
H
SCLK
L
MOSI
L
SLP_TR
L
Table 10-3.
Pull-up / pull-down configuration of digital input pins
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相关代理商/技术参数
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AT86RF230-ZU SL176 制造商:Atmel Corporation 功能描述:
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AT86RF231 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Low power 2.4 GHz Transceiver for ZigBee, IEEE 802.15.4, and ISM Applications
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