Datasheet

ADF4159 Data Sheet
Rev. D | Page 10 of 36
11.99
12.00
12.01
12.02
12.03
12.04
12.05
12.06
0 50 100 150 200
FREQUENCY (GHz)
TIME (µs)
10849-112
Figure 12. Fast Ramp (Triangle Ramp with Different Slopes), f
PFD
= 100 MHz,
I
CP
= 2.5 mA, Loop Bandwidth = 250 kHz, CLK
1
= 3; Up Ramp: CLK
2
= 26,
DEV = 1024, DEV_OFFSET = 8, Number of Steps = 64; Down Ramp: CLK
2
= 70,
DEV = 16,384, DEV_OFFSET = 8, Number of Steps = 4
–200
–150
–100
–50
0
50
100
150
200
0 50
100
150
200
PHASE (Degrees)
TIME (µs)
10849-113
Figure 13. Phase Shift Keying (PSK), Loop Bandwidth = 250 kHz,
Phase Value = 1024, Data Rate = 20 kHz
11.996
11.997
11.998
11.999
12.000
12.001
12.002
12.003
12.004
0
50
100
150
200
FREQUENCY (GHz)
TIME (µs)
10849-114
Figure 14. Frequency Shift Keying (FSK), Loop Bandwidth = 250 kHz,
DEV = 1049, DEV_OFFSET = 9, Data Rate = 20 kHz
11.994
11.996
11.998
12.000
12.002
12.004
12.006
12.008
12.010
12.012
12.014
0 100 200 300 400 500
FREQUENCY (GHz)
TIME (µs)
10849-115
Figure 15. FSK Ramp, f
PFD
= 100 MHz, I
CP
= 2.5 mA, Loop Bandwidth = 250 kHz,
CLK
1
= 3, CLK
2
= 26, DEV = 1024, DEV_OFFSET = 8, Number of Steps = 64;
FSK: DEV = −512, DEV_OFFSET = 8
–40
–35
–30
–25
–20
–15
–10
–5
0
0 5 10 15 20
RF SENSITIVIT
Y (dBm)
FREQUENCY (GHz)
PRESCALER 8/9
PRESCALER 4/5
10849-116
Figure 16. RF
IN
Sensitivity at Nominal Temperature
–6
–4
–2
0
2
4
6
0
0.5
1.0
1.5
2.0 2.5 3.0
I
CP
(mA)
V
CP
(V)
10849-1
17
Figure 17. Charge Pump Output Characteristics