参数资料
型号: AT86RF212-ZUR
厂商: Atmel
文件页数: 106/172页
文件大小: 0K
描述: TXRX AVR LOW PWR/VOLTAGE 32PQFN
标准包装: 1
频率: 700MHz,800MHz,900MHz
数据传输率 - 最大: 250kbps
调制或协议: 802.15.4 Zigbee,6LoWPAN,ISM
应用: ISM,ZigBee?
功率 - 输出: 10dBm
灵敏度: -110dBm
电源电压: 1.8 V ~ 3.6 V
电流 - 接收: 9.2mA
电流 - 传输: 25mA
数据接口: PCB,表面贴装
天线连接器: PCB,表面贴装
工作温度: -40°C ~ 85°C
封装/外壳: 32-VFQFN 裸露焊盘
包装: 标准包装
其它名称: AT86RF212-ZURDKR
Table 7-13. Register 0x05 (PHY_TX_PWR)
Bit
Name
Read/Write
Reset Value
Bit
Name
Read/Write
Reset Value
7
PA_BOOST
R/W
0
3
TX_PWR[3]
R/W
0
6
GC_PA[1]
R/W
1
2
TX_PWR[2]
R/W
0
5
GC_PA[0]
R/W
1
1
TX_PWR[1]
R/W
0
4
TX_PWR[4]
R/W
0
0
TX_PWR[0]
R/W
0
? Bit 7 – PA_BOOST
This bit enables the PA boost mode where the TX output power is increased by
approximately 5 dB when PA_BOOST = 1. In PA boost mode, the PA linearity is
decreased compared to the normal mode when PA_BOOST = 0. This leads to higher
spectral side lobes of the TX power spectrum and higher power of the harmonics.
Consequently, the higher TX power settings do not fulfill the regulatory requirements of
the European 868.3 MHz band regarding spurious emissions in adjacent frequency
bands (see ETSI EN 300 220-1, ERC/REC 70-03, and ERC/DEC/(01)04).
? Bit 6:5 – GC_PA
These register bits control the gain of the PA by changing its bias current. GC_PA
needs to be set in TRX_OFF mode only. It can be used to reduce the supply current in
TX mode when a reduced TX power is selected with the TX_PWR control word. A
reduced PA bias current causes lower RF gain and lowers the 1 dB- compression point
of the PA. Hence, it is advisable to use a reduced bias current of the PA only in
combination with lower values of TX_PWR. A reasonable combination of TX_PWR and
GC_PA is shown in Table 7-15.
Table 7-14. PA Gain Reduction Relative to the Gain at GC_PA=3
Register Bits
GC_PA
Value
0
1
2
3
PA Gain [dB]
-2.9
-1.3
-0.9
0
? Bit 4:0 – TX_PWR
These register bits control the transmitter output power. The value of TX_PWR
describes the power reduction relative to the maximum output power. The value
GC_TX = 0 provides the maximum output power. The resolution is 1 dB per step. Since
TX_PWR adjusts the gain in the TX path prior to the PA, the PA bias setting is not
optimal for increased values of TX_PWR regarding PA efficiency.
PA power efficiency can be improved when PA bias is reduced (decreased GC_PA
value) along with the TX power setting (increased TX_PWR value). A recommended
combination of TX power control (TX_PWR), PA bias control (GC_PA), and PA boost
mode (PA_BOOST) is listed in Table 7-15. It is a recommended mapping of intended
TX power to the 8-bit word in register 0x05. The value of TX_PWR shall be within the
range of 0 to 13 to guarantee the transmit signal quality.
106
AT86RF212
8168C-MCU Wireless-02/10
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