MAX2021
High-Dynamic-Range, Direct Up-/Downconversion
650MHz to 1200MHz Quadrature Mod/Demod
Table 2. Typical Performance Trade-Offs as a Function of Current Draw—Demodulator Mode
LO FREQ
(MHz)
800
900
1000
RF FREQ
(MHz)
771
871
971
R1
( ? )
420
453
499
549
650
420
453
499
549
650
420
453
499
549
650
R2
( ? )
620
665
698
806
1000
620
665
698
806
1000
620
665
698
806
1000
R3
( ? )
330
360
402
464
550
330
360
402
464
550
330
360
402
464
550
I CC
(mA)
269
254
230
207
173
269
254
230
207
173
269
254
230
207
173
CONVERSION
LOSS (dB)
9.8
9.83
9.81
9.84
9.95
9.21
9.25
9.36
9.39
9.46
9.47
9.5
9.53
9.5
9.61
IIP3
(dBm)
33.85
33.98
32.2
31.1
29.87
33.1
33.9
34.77
35.3
32
34.9
35.4
34.58
33.15
31.5
57MHz IIP2
(dBm)
62.1
62.9
66.6
66.86
65.25
68
66.87
66.7
66.6
64.64
> 77.7
> 77.5
> 76.5
> 76.5
76
Note: Used on PCB 180° combiners and off PCB quadrature combiner with V CC = 5V, P RF = -3dBm, P LO = 0dBm, T A = +25°C,
IF1 = 28MHz, IF2 = 29MHz.
Maxim Integrated
17
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