Table 4. MAX2658 Typical Noise Parameters (V
CC
= 2.85V, T
A
= +25°C)
Table 3. MAX2657 Typical Noise Parameters (V
CC
= 2.85V, T
A
= +25°C)
Table 2. MAX2658 Typical S-Parameter Values and K-Factor
FREQUENCY
(MHz)
FMIN
(dB)
|G
OPT
| |G
OPT
| ANGLE R
N
(Ω)
1550 0.68 0.28 88.0 4.48
1560 0.68 0.28 88.4 4.48
1570 0.68 0.28 88.8 4.48
1575 0.68 0.28 89.0 4.48
1580 0.68 0.28 89.2 4.48
1590 0.69 0.28 89.6 4.47
1600 0.69 0.28 90.0 4.47
FREQUENCY (MHz)
FMIN
(dB)
|G
OPT
| |G
OPT
| ANGLE R
N
(Ω)
1550 0.68 0.44 47.7 8.39
1560 0.68 0.44 48.1 8.38
1570 0.68 0.44 48.3 8.37
1575 0.68 0.44 48.5 8.36
1580 0.68 0.44 48.6 8.36
1590 0.68 0.44 48.9 8.35
1600 0.68 0.44 49.2 8.34
FREQ.
(MHz)
S11 MAG
(dB)
S11
PHASE
(Degrees)
S21 MAG
(dB)
S21
PHASE
(Degrees)
S12 MAG
(dB)
S12
PHASE
(Degrees)
S22 MAG
(dB)
S22
PHASE
(Degrees)
K
f
1000 -3.0 -57.0 10.8 -120.0 -43.0 -154.0 -1.3 -65.0 3.2
1100 -3.3 -58.2 11.6 -124.5 -42.1 -155.0 -1.6 -70.2 3.3
1200 -3.5 -60.0 13.4 -134.6 -39.3 -160.5 -2.4 -79.6 2.8
1300 -3.8 -62.3 14.9 -148.0 -37.2 -168.3 -4.0 -90.0 2.7
1400 -4.3 -63.3 15.9 -162.3 -35.4 -178.2 -7.3 -101.0 2.7
1500 -4.9 -62.0 16.6 -178.9 -33.9 171.0 -14.5 -100.6 2.6
1575 -5.3 -59.7 16.6 168.0 -33.5 161.7 -19.6 -26.0 2.5
1600 -5.4 -58.5 16.5 163.9 -33.6 157.5 -16.7 -6.0 2.5
1700 -5.5 -53.7 15.8 149.3 -33.6 148.3 -9.0 3.6 2.3
1800 -5.3 -50.3 14.7 136.8 -34.2 142.5 -5.7 -2.8 2.2
1900 -5.1 -48.0 13.4 130.0 -35.1 139.6 -4.0 -9.6 2.3
2000 -4.9 -46.3 12.7 123.9 -35.8 138.6 -3.0 -15.0 2.1
MAX2657/MAX2658 GPS/GNSS Low-Noise Ampliers
www.maximintegrated.com
Maxim Integrated
│
7