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參數(shù)資料
| 型號(hào)： | ADF4153 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Fractional-N Frequency Synthesizer |
| 中文描述： | 分?jǐn)?shù)N頻率合成器 |
| 文件頁數(shù)： | 11/24頁 |
| 文件大小： | 354K |
| 代理商： | ADF4153 |
ADF4153
PHASE FREQUENCY DETECTOR (PFD) AND
CHARGE PUMP
The PFD takes inputs from the R counter and N counter and
produces an output proportional to the phase and frequency
difference between them. Figure 19 is a simplified schematic.
The PFD includes a fixed delay element that sets the width of
the antibacklash pulse, which is typically 3 ns. This pulse
ensures that there is no dead zone in the PFD transfer function,
and gives a consistent reference spur level.
Rev. A | Page 11 of 24
U3
CLR2
D2
U2
Q2
DOWN
UP
HI
HI
CP
–IN
+IN
CHARGE
PUMP
DELAY
CLR1
Q1
D1
U1
0
Figure 19. PFD Simplified Schematic
MUXOUT AND LOCK DETECT
The output multiplexer on the ADF4153 allows the user to
access various internal points on the chip. The state of
MUXOUT is controlled by M3, M2, and M1 (see Table 8).
Figure 20 shows the MUXOUT section in block diagram form.
The N-channel open-drain analog lock detect should be
operated with an external pull-up resistor of 10 k nominal.
When lock has been detected, it is high with narrow low-going
pulses.
DIGITAL LOCK DETECT
R COUNTER OUTPUT
LOGIC LOW
DGND
CONTROL
MUX
MUXOUT
DV
DD
THREE-STATE OUTPUT
N COUNTER OUTPUT
ANALOG LOCK DETECT
LOGIC HIGH
0
Figure 20. MUXOUT Schematic
INPUT SHIFT REGISTERS
The ADF4153 digital section includes a 4-bit RF R counter, a 9-
bit RF N counter, a 12-bit FRAC counter, and a 12-bit modulus
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 and C1) in the shift register.
These are the 2 LSBs, 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.
PROGRAM MODES
Table 5 through Table 10 show how to set up the program
modes in the ADF4153.
The ADF4153 programmable modulus is double buffered. This
means that two events have to occur before the part uses a new
modulus value. First, the new modulus value is latched into the
device by writing to the R divider register. Second, a new write
must be performed on the N divider register. Therefore, any
time that the modulus value has been updated, the N divider
register must be written to after this, to ensure that the modulus
value is loaded correctly.
Table 5. C2 and C1 Truth Table
Control Bits
C2
C1
Register
0
0
N Divider Register
0
1
R Divider Register
1
0
Control Register
1
1
Noise and Spur Register
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| ADF4153ABCPZ | 制造商:Analog Devices 功能描述:SINGLE RF F-N PLL 制造商:Analog Devices 功能描述:SINGLE RF F-N PLL - Trays 制造商:Analog Devices 功能描述:IC PLL FREQ SYNTHESIZER 20-LFCSP 制造商:Analog Devices 功能描述:IC FREQ SYNTHESIZER 4GHZ 20 制造商:Analog Devices 功能描述:IC, FREQ SYNTHESIZER, 4GHZ, 20LFCSP 制造商:Analog Devices Inc. 功能描述:Phase Locked Loops - PLL Single RF F-N PLL 制造商:Analog Devices 功能描述:PLL SYNTHESIZER, FREQUENCY, 4GHZ, LFCSP-20; PLL Type:Frequency Synthesis; Frequency:4GHz; Supply Current:20mA; Supply Voltage Min:2.7V; Supply Voltage Max:3.3V; Digital IC Case Style:LFCSP; No. of Pins:20; Package / Case:20-LFCSP 制造商:Analog Devices 功能描述:IC, FREQ SYNTHESIZER, 4GHZ, 20LFCSP; Synthesizer Type:Frequency; Frequency:4GHz; Supply Voltage Min:2.7V; Supply Voltage Max:3.3V; Supply Current:20mA; Digital IC Case Style:LFCSP; No. of Pins:20; Operating Temperature Min:-40C; ;RoHS Compliant: Yes 制造商:Analog Devices 功能描述:PLL SYNTHESIZER, FREQUENCY, 4GHZ, LFCSP-20; PLL Type:Frequency Synthesis; Frequency:4GHz; Supply Current:20mA; Supply Voltage Min:2.7V; Supply Voltage Max:3.3V; Digital IC Case Style:LFCSP; No. of Pins:20; Package / Case:20-LFCSP ;RoHS Compliant: Yes |
| ADF4153ABCPZ-RL7 | 制造商:Analog Devices 功能描述:SINGLE RF F-N PLL 制造商:Analog Devices 功能描述:Fractional-N Frequency Synthesizer 20-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:SINGLE RF F-N PLL - Tape and Reel 制造商:Analog Devices 功能描述:IC PLL FREQ SYNTHESIZER 20LFCSP 制造商:Analog Devices Inc. 功能描述:Phase Locked Loops - PLL Single RF F-N PLL |
| ADF4153ABRUZ | 制造商:Analog Devices 功能描述:SINGLE RF F-N PLL - Rail/Tube 制造商:Analog Devices 功能描述:ngle RF F-N PLL |
| ADF4153ABRUZ-RL7 | 制造商:Analog Devices 功能描述:SINGLE RF F-N PLL - Tape and Reel 制造商:Analog Devices 功能描述:Single RF F-N PLL |
| ADF4153BCP | 制造商:Analog Devices 功能描述:PLL Frequency Synthesizer Single 20-Pin LFCSP EP 制造商:Analog Devices 功能描述:IC SYNTHESIZER PLL |
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