adf4351 Analog Devices, Inc., adf4351 Datasheet - Page 4

• Manufacturer Part Number: adf4351
• Description: Wideband Synthesizer With Integrated Vco Preliminary Technical Data Adf4351
• Manufacturer: Analog Devices, Inc.

ADF4351
Parameter
NOISE CHARACTERISTICS
1
2
3
4
5
6
7
8
9
AC coupling ensures AV
Guaranteed by design. Sample tested to ensure compliance.
I
T
Using 50 Ω resistors to V
main output.
The noise of the VCO is measured in open-loop conditions.
The synthesizer 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 N divider
value) and 10 log F
The PLL phase noise is composed of 1/f (flicker) noise plus the normalized PLL noise floor. The formula for calculating the 1/f noise contribution at an RF frequency F
and at a frequency offset f is given by PN = P
f
with an EVAL-ADF4351EB1Z and the Rohde & Schwarz FSUP signal source analyzer.
CP
REFIN
A
VCO Phase-Noise Performance
Integrated RMS Jitter
Spurious Signals Due to PFD Frequency
Level of Signal With RF Mute Enabled
Normalized Phase Noise Floor
Normalized 1/f Noise (PN
Normalized Phase Noise Floor
Normalized 1/f Noise (PN
= 25°C; AV
is internally modified to maintain constant loop gain over the frequency range.
(PN
(PN
= 100 MHz; f
SYNTH
SYNTH
DD
)
)
7
7
= DV
PFD
PFD
= 25 MHz; VCO frequency = 4222.56 MHz, RF
DD
. PN
= V
DD
VCO
SYNTH
9
/2 bias.
VCO
, into a 50 Ω load. Power measured with auxiliary RF output disabled. The current consumption of the auxiliary output is the same as for the
= 3.3 V; prescaler = 8/9; f
= PN
1_f
1_f
)
)
TOT
8
8
6
− 10 log F
1_f
+ 10log(10kHz/f) + 20log(F
PFD
Min
− 20 log N.
REFIN
= 100 MHz; f
B Version
OUT
Typ
−89
−114
−134
−148
−86
−111
−134
−145
−83
−110
−132
−145
−220
-116
−221
-118
0.32
−80
−40
= 2111.28 MHz; N = 168; loop BW = 40 kHz, I
PFD
Rev. PrC | Page 4 of 28
= 25 MHz; f
RF
/1GHz) . Both the normalized phase noise floor and flicker noise are modeled in ADIsimPLL.
Max
RF
= 4.4 GHz.
Unit
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
ps
dBc
dBm
Conditions/Comments
1 MHz offset from 2.2 GHz carrier
1 MHz offset from 3.3 GHz carrier
1 MHz offset from 4.4 GHz carrier
5 MHz offset from 4.4 GHz carrier
10 kHz offset from 2.2 GHz carrier
100 kHz offset from 2.2 GHz carrier
5 MHz offset from 2.2 GHz carrier
10 kHz offset from 3.3 GHz carrier
100 kHz offset from 3.3 GHz carrier
5 MHz offset from 3.3 GHz carrier
10 kHz offset from 4.4 GHz carrier
100 kHz offset from 4.4 GHz carrier
PLL Loop BW = 500kHz (ABP = 6 ns)
10kHz offset. Normalized to 1GHz. (ABP = 6 ns)
PLL Loop BW = 500kHz (ABP = 3 ns)
10kHz offset. Normalized to 1GHz. (ABP = 3 ns)
CP
Preliminary Technical Data
= 2.5 mA; low noise mode. The noise was measured
RF