参数资料
型号: EV-ADF4360-4EB1Z
厂商: Analog Devices Inc
文件页数: 3/24页
文件大小: 0K
描述: BOARD EVAL FOR ADF4360-4
标准包装: 1
主要目的: 计时,频率合成器
嵌入式:
已用 IC / 零件: ADF4360-4
主要属性: 带 VCO 的单路整数-N PLL
次要属性: 1.6GHz,200kHz PFD
已供物品: 板,缆线,CD
其它名称: Q7037782
Data Sheet
ADF4360-4
Rev. B | Page 11 of 24
The operating current in the VCO core is programmable in four
steps: 5 mA, 10 mA, 15 mA, and 20 mA. This is controlled by
Bits PC1 and PC2 in the control latch.
OUTPUT STAGE
The RFOUTA and RFOUTB pins of the ADF4360 family are con-
nected to the collectors of an NPN differential pair driven by
buffered outputs of the VCO, as shown in Figure 15. To allow
the user to optimize the power dissipation versus the output
power requirements, the tail current of the differential pair is
programmable via Bits PL1 and PL2 in the control latch. Four
current levels may be set: 3.5 mA, 5 mA, 7.5 mA, and 11 mA.
These levels give output power levels of 12 dBm, 9 dBm,
6 dBm, and 3dBm, respectively, using a 50 resistor to VDD
and ac coupling into a 50 load. Alternatively, both outputs
can be combined in a 1 + 1:1 transformer or a 180° microstrip
coupler (see the Output Matching section).
If the outputs are used individually, the optimum output stage
consists of a shunt inductor to VDD.
Another feature of the ADF4360 family is that the supply current
to the RF output stage is shut down until the part achieves lock as
measured by the digital lock detect circuitry. This is enabled by the
mute-till-lock detect (MTLD) bit in the control latch.
VCO
RFOUTA
RFOUTB
BUFFER/
DIVIDE BY 2
04438-015
Figure 15. Output Stage ADF4360-4
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