![](http://datasheet.mmic.net.cn/Analog-Devices-Inc/ADF4252BCPZ-R7_datasheet_100744/ADF4252BCPZ-R7_2.png)
REV. B
–2–
ADF4252–SPECIFICATIONS1
(VDD1 = VDD2 = VDD3 = DVDD = 3 V
10%, DVDD < VP1, VP2 < 5.5 V, GND = 0 V,
RSET = 2.7 k , dBm referred to 50
, TA = TMIN to TMAX, unless otherwise noted.)
Parameter
B Version
Unit
Test Conditions/Comments
RF CHARACTERISTICS
RF Input Frequency (RFINA, RFINB)
2
0.25/3.0
GHz min/max
RF Input Sensitivity
–10/0
dBm min/max
RF Input Frequency (RFINA, RFINB)
2
0.1/3.0
GHz min/max
Input Level = –8/0 dBm min/max
RF Phase Detector Frequency
30
MHz max
Guaranteed by Design
Allowable Prescaler Output Frequency
375
MHz max
IF CHARACTERISTICS
IF Input Frequency (IFINA, IFINB)
2
50/1200
MHz min/max
IF Input Sensitivity
–10/0
dBm min/max
IF Phase Detector Frequency
55
MHz max
Guaranteed by Design
Allowable Prescaler Output Frequency
150
MHz max
REFERENCE CHARACTERISTICS
REFIN Input Frequency
250
MHz max
For f < 10 MHz, use dc-coupled square
wave (0 to VDD).
REFIN Input Sensitivity
0.5/VDD1V p-p min/max
AC-coupled. When dc-coupled, use
0 to VDD max (CMOS compatible).
REFIN Input Current
±100
A max
REFIN Input Capacitance
10
pF max
CHARGE PUMP
RF ICP Sink/Source
High Value
4.375
mA typ
See Table V
Low Value
A typ
IF ICP Sink/Source
High Value
5
mA typ
See Table IX
Low Value
625
A typ
ICP Three-State Leakage Current
1
nA typ
RF Sink and Source Current Matching
2
% typ
0.5 V < VCP < VP – 0.5
RSET Range
1.5/1.6
k
typ
See Table V
IF Sink and Source Current Matching
2
% typ
ICP vs. VCP
2% typ
0.5 V < VCP < VP – 0.5
ICP vs. Temperature
2
% typ
VCP = VP /2
LOGIC INPUTS
VINH, Input High Voltage
1.35
V min
VINL, Input Low Voltage
0.6
V max
IINH/IINL, Input Current
±1
A max
CIN Input Capacitance
10
pF max
LOGIC OUTPUTS
VOH, Output High Voltage
VDD – 0.4
V min
IOH = 0.2 mA
VOL, Output Low Voltage
0.4
V max
IOL = 0.2 mA
POWER SUPPLIES
VDD1, VDD2, VDD3
2.7/3.3
V min/V max
DVDD
VDD1
VP1, VP2VDD1/5.5
V min/V max
IDD
3
RF + IF
13
mA typ
16 mA max
RF Only
10
mA typ
13 mA max
IF Only
4
mA typ
5.5 mA max
Power-Down Mode
1
A typ
RF NOISE AND SPURIOUS CHARACTERISTICS
Noise Floor
–141
dBc/Hz typ
@ 20 MHz PFD Frequency
In-Band Phase Noise Performance
4
@ VCO Output
Lowest Spur Mode
–90
dBc/Hz typ
RFOUT = 1.8 GHz, PFD = 20 MHz
Low Noise and Spur Mode
–95
dBc/Hz typ
RFOUT = 1.8 GHz, PFD = 20 MHz
Lowest Noise Mode
–103
dBc/Hz typ
RFOUT = 1.8 GHz, PFD = 20 MHz
Spurious Signals
See Typical Performance Characteristics
NOTES
1Operating Temperature Range (B Version): –40
°C to +85°C.
2Use a square wave for frequencies less than f
MIN.
3RF = 1 GHz, RF PFD = 10 MHz, MOD = 4095, IF = 500 MHz, IF PFD = 200 kHz, REF = 10 MHz, V
DD = 3 V, VP1 = 5 V, and VP2 = 3 V.
4The in-band phase noise is measured with the EVAL-ADF4252EB2 evaluation board and the HP5500E phase noise test system. The spectrum analyzer provides the
REFIN for the synthesizer (fREFOUT = 10 MHz @ 0 dBm). fOUT = 1.74 GHz, fREF = 20 MHz, N = 87, Mod = 100, Channel Spacing = 200 kHz, VDD = 3.3 V, and VP = 5 V.
Specifications subject to change without notice.