Datasheet

MAX2870
23.5MHz to 6000MHz Fractional/
Integer-N Synthesizer/VCO
5Maxim Integrated
Typical Operating Characteristics
(Measured with MAX2870 EV Kit. V
CC_
= 3.3V, V
GND_
= 0V, f
REF_IN
= 50MHz, T
A
= +25°C, see the Testing Conditions Table.)
3.0GHz VCO OPEN-LOOP PHASE NOISE
vs. FREQUENCY
MAX2780 toc01
FREQUENCY (kHz)
PHASE NOISE (dBc/Hz)
10k1k10010
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-160
1 100k
3.0GHz CLOSED-LOOP PHASE NOISE
vs. FREQUENCY
MAX2780 toc04
FREQUENCY (kHz)
PHASE NOISE (dBc/Hz)
10k1k10010
-70
-170
1 100k
-160
-150
-140
-130
-120
-110
-100
-90
-80
DIV1
DIV2
DIV4
DIV8
DIV16
DIV32
DIV64
DIV128
1k100101 10k
MAX2780 toc07
FREQUENCY (kHz)
904MHz INTEGER-N MODE PHASE NOISE
AND SPUR PERFOMANCE vs. FREQUENCY
0
-160
-140
-120
-100
-80
-60
-40
-20
PHASE NOISE (dBc/Hz)
SPURS (dBc)
4.5GHz VCO OPEN-LOOP PHASE NOISE
vs. FREQUENCY
MAX2780 toc02
FREQUENCY (kHz)
PHASE NOISE (dBc/Hz)
10k1k10010
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-160
1 100k
4.5GHz CLOSED-LOOP PHASE NOISE
vs. FREQUENCY
MAX2780 toc05
FREQUENCY (kHz)
PHASE NOISE (dBc/Hz)
10k1k10010
-70
-170
1 100k
-160
-150
-140
-130
-120
-110
-100
-90
-80
DIV1
DIV2
DIV4
DIV8
DIV16
DIV32
DIV64
DIV128
1k100101 10k
MAX2780 toc08
FREQUENCY (kHz)
2687.5MHz INTEGER-N MODE PHASE NOISE
AND SPUR PERFOMANCE vs. FREQUENCY
0
-160
-140
-120
-100
-80
-60
-40
-20
PHASE NOISE (dBc/Hz)
SPURS (dBc)
6.0GHz VCO OPEN-LOOP PHASE NOISE
vs. FREQUENCY
MAX2780 toc03
FREQUENCY (kHz)
PHASE NOISE (dBc/Hz)
10k1k10010
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-160
1 100k
6.0GHz CLOSED-LOOP PHASE NOISE
vs. FREQUENCY
MAX2780 toc06
FREQUENCY (kHz)
PHASE NOISE (dBc/Hz)
10k1k10010
-70
-170
1 100k
-160
-150
-140
-130
-120
-110
-100
-90
-80
DIV1
DIV2
DIV4
DIV8
DIV16
DIV32
DIV64
DIV128
1k100101 10k
2113.5MHz FRACTIONAL-N PHASE NOISE
(LOW-NOISE MODE) vs. FREQUENCY
MAX2780 toc09
FREQUENCY (kHz)
PHASE NOISE (dBc/Hz)
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-170