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参数资料
| 型号： | EV-ADF4360-4EB1Z |
| 厂商： | Analog Devices Inc |
| 文件页数： | 2/24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： | 否 |
| 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 |
ADF4360-4
Data Sheet
Rev. B | Page 10 of 24
MUXOUT AND LOCK DETECT
The output multiplexer on the ADF4360 family allows the user
to access various internal points on the chip. The state of
MUXOUT is controlled by M3, M2, and M1 in the function
latch. The full truth table is shown in Table 7. Figure 13 shows
the MUXOUT section in block diagram form.
Lock Detect
MUXOUT can be programmed for two types of lock detect:
digital and analog. Digital lock detect is active high. When LDP
in the R counter latch is set to 0, digital lock detect is set high
when the phase error on three consecutive phase detector cycles
is less than 15 ns.
With LDP set to 1, five consecutive cycles of less than 15 ns
phase error are required to set the lock detect. It stays set high
until a phase error greater than 25 ns is detected on any
subsequent PD cycle.
The N-channel open-drain analog lock detect should be operat-
ed with an external pull-up resistor of 10 k nominal. When a
lock has been detected, the output is high with narrow low-
going pulses.
R COUNTER OUTPUT
N COUNTER OUTPUT
DIGITAL LOCK DETECT
DGND
CONTROL
MUX
MUXOUT
DVDD
ANALOG LOCK DETECT
SDOUT
04438-013
Figure 13. MUXOUT Circuit
INPUT SHIFT REGISTER
The ADF4360 family’s digital section includes a 24-bit input
shift register, a 14-bit R counter, and an 18-bit N counter,
comprised of a 5-bit A counter and a 13-bit B counter. Data is
clocked into the 24-bit shift register on each rising edge of CLK.
The data is clocked in MSB first. Data is transferred from the
shift register to one of four latches on the rising edge of LE. The
destination latch is determined by the state of the two control
bits (C2, C1) in the shift register. The two LSBs are DB1 and
DB0, as shown in Figure 2.
The truth table for these bits is shown in Table 5. Table 6 shows
a summary of how the latches are programmed. Note that the
test mode latch is used for factory testing and should not be
programmed by the user.
Table 5. C2 and C1 Truth Table
Control Bits
C2
C1
Data Latch
0
Control Latch
0
1
R Counter
1
0
N Counter (A and B)
1
Test Mode Latch
VCO
The VCO core in the ADF4360 family uses eight overlapping
bands, as shown in Figure 14, to allow a wide frequency range
to be covered without a large VCO sensitivity (KV) and resultant
poor phase noise and spurious performance.
The correct band is chosen automatically by the band select
logic at power-up or whenever the N counter latch is updated. It
is important that the correct write sequence be followed at pow-
er-up. This sequence is
1. R counter latch
2. Control latch
3. N counter latch
During band select, which takes five PFD cycles, the VCO VTUNE
is disconnected from the output of the loop filter and connected
to an internal reference voltage.
04438-014
0
1350
1450
1550
1650
1750
1850
1250
1950
0.5
1.0
1.5
2.0
2.5
3.0
3.5
FREQUENCY (MHz)
VOLTAGE
(V)
Figure 14. Frequency vs. VTUNE, ADF4360-4
The R counter output is used as the clock for the band select logic
and should not exceed 1 MHz. A programmable divider is provid-
ed at the R counter input to allow division by 1, 2, 4, or 8 and is
controlled by Bits BSC1 and BSC2 in the R counter latch. Where
the required PFD frequency exceeds 1 MHz, the divide ratio should
be set to allow enough time for correct band selection.
After band select, normal PLL action resumes. The nominal value
of KV is 50 MHz/V or 25 MHz/V, if divide-by-2 operation has been
selected (by programming DIV2 [DB22] high in the N counter
latch). The ADF4360 family contains linearization circuitry to min-
imize any variation of the product of ICP and KV.
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参数描述 |
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| EV-ADF4360-5EB1Z | 功能描述:时钟和定时器开发工具 Evaluation Board I.C. RoHS:否 制造商:Texas Instruments 产品:Evaluation Modules 类型:Clock Conditioners 工具用于评估:LMK04100B 频率:122.8 MHz 工作电源电压:3.3 V |
| EV-ADF4360-6EB1Z | 功能描述:BOARD EVAL FOR ADS4360-6EBIZ RoHS:否 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| EV-ADF4360-7EB1Z | 功能描述:BOARD EVAL FOR ADF4360-7 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| EV-ADF4360-8EB1Z | 功能描述:BOARD EVALUATION FOR ADF4360-8 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| EV-ADF4360-9EB1Z | 功能描述:BOARD EVAL FOR ADF4360-9 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
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