AD9518-3A-PCBZ AD [Analog Devices], AD9518-3A-PCBZ Datasheet - Page 5

• Manufacturer Part Number: AD9518-3A-PCBZ
• Description: 6-Output Clock Generator with 6-Output Clock Generator with
• Manufacturer: AD [Analog Devices]

Data Sheet
Parameter
CHARGE PUMP (CP)
PRESCALER (PART OF N DIVIDER)
PLL DIVIDER DELAYS
NOISE CHARACTERISTICS
PLL DIGITAL LOCK DETECT WINDOW
1
2
REFIN and REFIN self-bias points are offset slightly to avoid chatter on an open input condition.
For reliable operation of the digital lock detect, the period of the PFD frequency must be greater than the unlock-after-lock time.
I
I
Sink-and-Source Current Matching
I
I
Prescaler Input Frequency
Prescaler Output Frequency
000
001
010
011
100
101
110
111
In-Band Phase Noise of the Charge
PLL Figure of Merit (FOM)
Required to Lock (Coincidence of Edges)
To Unlock After Lock (Hysteresis)
CP
CP
CP
CP
High Value
Low Value
Absolute Accuracy
CP
P = 1 FD
P = 2 FD
P = 3 FD
P = 2 DM (2/3)
P = 4 DM (4/5)
P = 8 DM (8/9)
P = 16 DM (16/17)
P = 32 DM (32/33)
Pump/Phase Frequency Detector
(In-Band Is Within the LBW of the PLL)
At 500 kHz PFD Frequency
At 1 MHz PFD Frequency
At 10 MHz PFD Frequency
At 50 MHz PFD Frequency
Low Range (ABP 1.3 ns, 2.9 ns)
High Range (ABP 1.3 ns, 2.9 ns)
High Range (ABP 6.0 ns)
Low Range (ABP 1.3 ns, 2.9 ns)
High Range (ABP 1.3 ns, 2.9 ns)
High Range (ABP 6.0 ns)
Sink/Source
High Impedance Mode Leakage
vs. CP
vs. Temperature
RSET
Range
V
2
2
Min
Typ
4.8
0.60
2.5
2.7/10
1
2
1.5
2
Off
330
440
550
660
770
880
990
−165
−162
−151
−143
−220
3.5
7.5
3.5
7
15
11
Max
300
600
900
200
1000
2400
3000
3000
300
Rev. B | Page 5 of 64
Unit
mA
mA
%
kΩ
nA
%
%
%
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
ps
ps
ps
ps
ps
ps
ps
ps
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
ns
ns
ns
ns
ns
ns
Test Conditions/Comments
CP
Programmable
With CP
CP
0.5 < CP
0.5 < CP
CP
See the VCXO/VCO Feedback Divider N—P, A, B, R section
A, B counter input frequency (prescaler input frequency
divided by P)
Register 0x019: R, Bits[5:3]; N, Bits[2:0] (see
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)
Reference slew rate > 0.25 V/ns; FOM + 10 log(f
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)
Signal available at LD, STATUS, and REFMON pins when
selected by appropriate register settings
Selected by Register 0x017[1:0] and Register 0x018[4]
Register 0x017[1:0] = 00b, 01b,11b; Register 0x018[4] = 1b
Register 0x017[1:0] = 00b, 01b, 11b; Register 0x018[4] = 0b
Register 0x017[1:0] = 10b; Register 0x018[4] = 0b
Register 0x017[1:0] = 00b, 01b, 11b; Register 0x018[4] = 1b
Register 0x017[1:0] = 00b, 01b, 11b; Register 0x018[4] = 0b
Register 0x017[1:0] = 10b; Register 0x018[4] = 0b
V
V
V
is CP pin voltage; V
= V
= V
CP
CP
RSET
V
V
/2 V
/2 V
< V
< V
= 5.1 kΩ
CP
CP
− 0.5 V
− 0.5 V
CP
is charge pump power supply voltage
Table 44
AD9518-3
PFD
) is an
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