參數(shù)資料
型號: AD9520-3BCPZ
廠商: Analog Devices Inc
文件頁數(shù): 56/80頁
文件大?。?/td> 0K
描述: IC CLOCK GEN 2GHZ VCO 64LFCSP
設計資源: Synchronizing Multiple AD9910 1 GSPS Direct Digital Synthesizers (CN0121)
Phase Coherent FSK Modulator (CN0186)
標準包裝: 1
類型: 時鐘發(fā)生器,扇出配送
PLL:
輸入: CMOS,LVDS,LVPECL
輸出: CMOS,LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 2:12,2:24
差分 - 輸入:輸出: 是/是
頻率 - 最大: 2.25GHz
除法器/乘法器: 是/無
電源電壓: 3.135 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-VFQFN 裸露焊盤,CSP
供應商設備封裝: 64-LFCSP-VQ(9x9)
包裝: 托盤
產品目錄頁面: 776 (CN2011-ZH PDF)
AD9520-3
Data Sheet
Rev. A | Page 6 of 80
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
PHASE OFFSET IN ZERO DELAY
REF refers to REFIN (REF1)/REFIN (REF2)
Phase Offset (REF-to-LVPECL Clock Output
Pins) in Internal Zero Delay Mode
560
1060
1310
ps
When N delay and R delay are bypassed
Phase Offset (REF-to-LVPECL Clock Output
Pins) in Internal Zero Delay Mode
320
+50
+240
ps
When N delay setting = 110b, and R delay is bypassed
Phase Offset (REF-to-CLK Input Pins) in
External Zero Delay Mode
140
630
870
ps
When N delay and R delay are bypassed
Phase Offset (REF-to-CLK Input Pins) in
External Zero Delay Mode
460
20
+200
ps
When N delay setting = 011b, and R delay is bypassed
NOISE CHARACTERISTICS
In-Band Phase Noise of the Charge Pump/
Phase Frequency Detector 2
The PLL in-band phase noise floor is estimated by
measuring the in-band phase noise at the output of the
VCO and subtracting 20 log(N) (where N is the value of
the N divider).
500 kHz PFD Frequency
165
dBc/Hz
1 MHz PFD Frequency
162
dBc/Hz
10 MHz PFD Frequency
152
dBc/Hz
50 MHz PFD Frequency
144
dBc/Hz
PLL Figure of Merit (FOM)
222
dBc/Hz
Reference slew rate > 0.5 V/ns; FOM + 10 log(fPFD) is an
approximation of the PFD/CP in-band phase noise (in the
flat region) inside the PLL loop bandwidth; when
running closed-loop, the phase noise, as observed at the
VCO output, is increased by 20 log(N); PLL figure of merit
decreases with decreasing slew rate; see Figure 12
PLL DIGITAL LOCK DETECT WINDOW3
Signal available at the LD, STATUS, and REFMON pins
when selected by appropriate register settings; the lock
detect threshold varies linearly with the value of the
CPRSET resistor
Lock Threshold (Coincidence of Edges)
Selected by Register 0x017[1:0] and Register 0x018[4]
(this is the threshold to go from unlock to lock)
Low Range (ABP 1.3 ns, 2.9 ns)
3.5
ns
Register 0x017[1:0] = 00b, 01b,11b;
Register 0x018[4] = 1b
High Range (ABP 1.3 ns, 2.9 ns)
7.5
ns
Register 0x017[1:0] = 00b, 01b, 11b;
Register 0x018[4] = 0b
High Range (ABP 6.0 ns)
3.5
ns
Register 0x017[1:0] = 10b; Register 0x018[4] = 0b
Unlock Threshold (Hysteresis)3
Selected by Register 0x017[1:0] and Register 0x018[4] (this
is the threshold to go from lock to unlock)
Low Range (ABP 1.3 ns, 2.9 ns)
7
ns
Register 0x017[1:0] = 00b, 01b, 11b;
Register 0x018[4] = 1b
High Range (ABP 1.3 ns, 2.9 ns)
15
ns
Register 0x017[1:0] = 00b, 01b, 11b;
Register 0x018[4] = 0b
High Range (ABP 6.0 ns)
11
ns
Register 0x017[1:0] = 10b; Register 0x018[4] = 0b
1
The REFIN and REFIN self-bias points are offset slightly to avoid chatter on an open input condition.
2
In-band means within the LBW of the PLL.
3
For reliable operation of the digital lock detect, the period of the PFD frequency must be greater than the unlock-after-lock time.
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