CMX994 Datasheet, PDF (53/61 Pages) CML Microcircuits – Local Oscillator

Direct Conversion Receivers
AC Parameters – Low Noise Amplifier Section
LNA
Gain
100MHz
450MHz
940MHz
Reverse Isolation (S₁₂)
100MHz
450MHz
940MHz
Gain Control Range
Gain Control Step Size
Noise Figure
100MHz
450MHz
940MHz
Third Order Intercept Point (input)
100MHz
450MHz
940MHz
1dB Gain Compression Point (input)
100MHz
450MHz
940MHz
Input Impedance
Output Impedance
Operating Frequency Range
LO Leakage at LNA Input
CMX994/CMX994A/CMX994E
Notes
Min.
14
–
12,14
–
17
–
14
–
14
–
17
–
16
–
16
4
14
14
–
14
–
17
–
14
–
11,14
–
11,14,17
–
14
–
14
–
17
–
10
–
10, 13
–
15
100
–
Typ.
15
12.5
11
-40
-27
-19
18
6
2
2
3.5
8
8
0.5
-11
-12
-10
–
100R //
1.2pF
–
<-90
Max.
–
–
–
–
–
–
–
8
–
–
–
–
–
–
–
–
–
–
–
1000
–
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
dBm
dBm
Ω
Ω
MHz
dBm
Notes:
10. For further details see section 5.2.1
11. Intermodulation optimised using Intermodulation Control Register, for further details see section
6.5.
12. The gain is approximately 2dB higher if the LNA Z₀ (Rx Gain Register b3) is set to ‘1’.
13. The impedance is approximately 50Ω if the LNA Z₀ (Rx Gain Register b3) is set to ‘1’.
14. Measured at maximum gain with the LNA Zo (Rx Gain Register b3) set to ‘0’.
15. For extended operation down to 50MHz see section 8.2.
16. See section 8.1.3 for further details
17. LNA Z₀ = 50Ω (Rx Gain Register b3 set to ‘1’)
 2015 CML Microsystems Plc
Page 53 of 70
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