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參數(shù)資料
| 型號(hào)： | ADF4193 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Low Phase Noise, Fast Settling PLL Frequency Synthesizer |
| 中文描述： | 低相位噪聲，快速設(shè)置的鎖相環(huán)頻率合成器 |
| 文件頁(yè)數(shù)： | 20/28頁(yè) |
| 文件大小： | 437K |
| 代理商： | ADF4193 |
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ADF4193
POWER-DOWN REGISTER (R5)
Rev. B | Page 20 of 28
0
DB7
F5
DB6
F4
DB5
F3
DB4
F2
DB3
F1
DB2
C3 (1)
DB1
C2 (0)
DB0
C1 (1)
C
R
C
3
P
C
P
CONTROL
BITS
PD
DIFF AMP
0
1
F4
0
1
F5
DISABLED
ENABLED
DIFF AMP
POWER-DOWN
0
1
F2
NORMAL OPERATION
3-STATE ENABLED
CHARGE PUMP
3-STATE
0
1
F1
NORMAL OPERATION
COUNTER RESET
COUNTER RESET
0
1
F3
DISABLED
ENABLED
CHARGE PUMP
POWER-DOWN
Figure 34. Power-Down Register (R5)
R5, the power-down register (C3, C2, C1 set to 1, 0, 1,
respectively) can be used to software power down the PLL and
differential amplifier sections. After power is initially applied,
there must be writes to R5 to clear the power-down bits and to
R2, R1, and R0 before the ADF4193 comes out of power-down.
Power-Down Differential Amplifier
When Bit DB6 and Bit DB7 are set high, the differential
amplifier is put into power-down. When Bit DB6 and Bit DB7
are set low, normal operation is resumed.
Power-Down Charge Pump
Setting Bit DB5 high activates a charge pump power-down and
the following events occur:
All active dc current paths are removed, except for the
differential amplifier.
The R and N divider counters are forced to their load state
conditions.
The charge pump is powered down with its outputs in three-
state mode.
The digital lock detect circuitry is reset.
The RF
IN
input is debiased.
The reference input buffer circuitry is disabled.
The serial interface remains active and capable of loading and
latching data.
For normal operation, Bit DB5 should be set to 0, followed by a
write to R0.
CP Three-State
When this bit is set high, the charge pump outputs are put into
three-state. With the bit set low, the charge pump outputs are
enabled.
Counter Reset
When this bit is set to 1, the counters are held in reset. For
normal operation, this bit should be 0, followed by a write to R0.
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| ADF4193BCPZ-RL | 功能描述:IC PLL FREQ SYNTHESIZER 32LFCSP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:PLL 時(shí)鐘發(fā)生器 PLL:帶旁路 輸入:LVCMOS，LVPECL 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:2:11 差分 - 輸入:輸出:是/無(wú) 頻率 - 最大:240MHz 除法器/乘法器:是/無(wú) 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:32-LQFP 供應(yīng)商設(shè)備封裝:32-TQFP（7x7） 包裝:帶卷 (TR) |
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