700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, V CC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ f RF ≤ 1200MHz,
40MHz ≤ f LO ≤ 100MHz, T C = -40°C to +85°C. Typical values are at V CC = 5.0V, P IN = 0dBm, f RF = 940MHz, f LO = 45MHz, f LBOUT =
f RF - f LO , and T C = +25°C, unless otherwise noted.)
0
10
MIXER OUTPUT RETURN LOSS
vs. RF FREQUENCY (MIXER DISABLED)
0
10
MIXER OUTPUT RETURN LOSS
vs. RF FREQUENCY (MIXER DISABLED)
0
10
LO RETURN LOSS vs. LO FREQUENCY
(MIXER ENABLED)
T C = +5 ° C
T C = -40 ° C
V CC = 4.75V, 5.0V, 5.25V
20
20
20
T C = +85 ° C
T C = +25 ° C
30
T C = +85 ° C
T C = +25 ° C
30
30
T C = +5 ° C
T C = -40 ° C
40
40
40
700
800
900 1000 1100
1200
700
800
900 1000 1100
1200
0
50 100 150
200
RF FREQUENCY (MHz)
LO RETURN LOSS vs. LO FREQUENCY
RF FREQUENCY (MHz)
ATTEN A ONLY
LO FREQUENCY (MHz)
ATTEN A ONLY
GAIN vs. RF FREQUENCY
0
(MIXER ENABLED)
0
GAIN vs. RF FREQUENCY
0
(NMT 450MHz BAND)
10
20
30
40
V CC = 4.75V, 5.0V, 5.25V
-10
-20
-30
-40
-10
-20
-30
-40
0
50
100
150
200
700
800
900
1000
1100
1200
300
350
400
450
500
550
LO FREQUENCY (MHz)
ATTEN A ONLY
RF FREQUENCY (MHz)
ATTEN A ONLY
ABS ACCURACY vs. RF FREQUENCY
RF FREQUENCY (MHz)
ATTEN A ONLY
2.0
ABS ACCURACY vs. RF FREQUENCY
2.0
(NMT 450MHz BAND)
1.0
REL ACCURACY vs. RF FREQUENCY
1.5
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
0.5
0
-0.5
-1.0
700
800
900
1000
1100
1200
300
350
400
450
500
550
700
800
900
1000
1100
1200
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
8
_______________________________________________________________________________________
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