MAX2642/MAX2643
900MHz SiGe, High IP3,
Low-Noise Amplifiers
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Table 7. MAX2642/MAX2643 Typical Noise Parameters
(R
BIAS
= 510Ω, high-gain mode, V
CC
= +3.0V, T
A
= +25°C.)
FREQUENCY
(MHz)
NF
MIN
(dB)
Γ
opt
MAG
Γ
opt
PHASE
(DEGREES)
R
N
(Ω)
800 1.011 0.3074 55.04 13.11
850 1.023 0.3016 58.89 13.28
875 1.030 0.2990 60.83 13.38
900 1.037 0.2965 62.77 13.49
925 1.045 0.2942 64.70 13.60
950 1.053 0.2919 66.62 13.72
1000 1.069 0.2879 70.40 13.96
Table 8. MAX2642/MAX2643 Typical Noise Parameters
(R
BIAS
= 806Ω, high-gain mode, V
CC
= +3.0V, T
A
= +25°C.)
FREQUENCY
(MHz)
NF
MIN
(dB)
Γ
opt
MAG
Γ
opt
PHASE
(DEGREES)
R
N
(Ω)
800 1.149 0.3905 54.95 15.14
850 1.161 0.3832 58.63 15.32
875 1.168 0.3798 60.49 15.43
900 1.176 0.3766 62.35 15.55
925 1.185 0.3735 64.21 15.68
950 1.194 0.3705 66.06 15.82
1000 1.213 0.3650 69.72 16.11
Table 9. MAX2642/MAX2643 Typical Noise Parameters
(R
BIAS
= 1.1kΩ, high-gain mode, V
CC
= +3.0V, T
A
= +25°C.)
FREQUENCY
(MHz)
NF
MIN
(dB)
Γ
opt
MAG
Γ
opt
PHASE
(DEGREES)
R
N
(Ω)
800 1.312 0.4473 55.50 17.64
850 1.325 0.4391 59.12 17.83
875 1.333 0.4353 60.96 17.96
900 1.342 0.4317 62.79 18.11
925 1.352 0.4282 64.63 18.26
950 1.363 0.4249 66.46 18.43
1000 1.385 0.4186 70.08 18.78
