Datasheet
MAX2470/MAX2471
10MHz to 500MHz VCO Buffer Amplifiers
with Differential Outputs
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
CC
= +3.0V, MAX2470 output and MAX2471 input and output measurements taken differentially, T
A
= +25°C, unless otherwise
noted.)
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
2.5 3.53.0 4.0 4.5 5.0 5.5
MAX2470
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(HI/LO = GND)
MAX2470/71-01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
-5dBm OUTPUT POWER
f
IN
= 200MHz
HI/LO = GND
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
4.8
5.0
4.9
5.1
5.3
5.2
5.4
5.5
5.6
5.7
5.8
5.9
6.0
2.5 3.53.0 4.0 4.5 5.0 5.5
MAX2470 (HI/LO = V
CC
) AND MAX2471
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2470/71-02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= +25°C
-5dBm OUTPUT POWER
f
IN
= 500MHz
HI/LO = GND (MAX2470)
T
A
= -40°C
T
A
= +85°C
-16
-13
-14
-15
-12
-9
-10
-11
-8
-7
-5
-6
-4
-3
-1
-2
0
-30 -24-26-28 -20-22 -16-18 -12-14 -10
MAX2470
OUTPUT POWER vs. INPUT POWER
MAX2470/71-03
INPUT POWER (dBm)
OUTPUT POWER (dBm)
HI/LO = GND
f
IN
= 200MHz
HI/LO = V
CC
f
IN
= 500MHz
8.0
10.0
9.0
14.0
13.0
12.0
11.0
15.0
16.0
0 10050 150 200
MAX2470/71-04
FREQUENCY (MHz)
IS
21
I
2
(dB)
T
A
= -40°C
HI/LO = GND
MAX2470
TRANSDUCER GAIN vs. FREQUENCY
(HI/LO = GND)
T
A
= +25°C
T
A
= +85°C
10.0
11.0
10.5
11.5
12.0
0 200 300100 400 500
MAX2470
NOISE FIGURE vs. FREQUENCY
(HI/LO = V
CC
)
MAX2470/71-07
FREQUENCY (MHz)
NOISE FIGURE (dB)
HI/LO = V
CC
9.0
10.0
14.0
13.0
12.0
11.0
15.0
17.0
16.0
0 200100 300 400 500
MAX2470
TRANSDUCER GAIN vs. FREQUENCY
(HI/LO = V
CC
)
MAX2470/71-05
FREQUENCY (MHz)
IS
21
I
2
(dB)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
HI/LO = V
CC
9.5
10.0
11.0
10.5
11.5
12.0
0 10050
150
200
MAX2470
NOISE FIGURE vs. FREQUENCY
(HI/LO = GND)
MAX2470/71-06
FREQUENCY (MHz)
NOISE FIGURE (dB)
HI/LO = GND
10,000
1
0 150 20050 100 350 500
MAX2470
REAL INPUT IMPEDANCE vs. FREQUENCY
10
100
1000
MAX2470/71-08
FREQUENCY (MHz)
RE [Z
IN
] (Ω)
250 300 450400
HI/LO = V
CC
-3000
-2000
-2500
-1000
-1500
-500
0
0 200100 300 400 500
MAX2470
IMAGINARY INPUT IMPEDANCE vs. FREQUENCY
MAX2470/71-09
FREQUENCY (MHz)
IM [Z
IN
] (Ω)
HI/LO = V
CC