CMX994 Datasheet, PDF (57/61 Pages) CML Microcircuits – Local Oscillator

Direct Conversion Receivers
Zero IF Amplifiers and Filters
Gain
Noise Figure
Third Order Intercept Point (Output)
Output Impedance
1dB Compression Point
VGA Control Range
VGA Step Size
I/Q Output Bandwidth
I/Q Differential Output Voltage Swing
I/Q Output Common Mode
Post Mixer Filter
Bandwidth (-3dB)
Adjacent Channel Rejection
Bandwidth (-3dB)
Scaling Factors
Bandwidth Variation
Third Order Intermodulation
Post Mixer Filter
1^st Amplifier
2^nd Amplifier
Notes
Min.
26, 30
–
27
–
27,30a
–
–
27
-30
31
–
4
–
20
–
–
32, 37
–
32
–
–
33
–
34
27, 35
–
27, 35
85
27, 36
85
Typ.
34
–
>50
20
–
42
6
–
–
AV_DD/2
88
2
1:2:4
–
90
–
–
CMX994/CMX994A/CMX994E
Max.
–
10
–
–
–
–
8
1.6
4.0
–
Units
dB(V/V)
dB
dBm
Ω
dBm
dB
dB
MHz
Vp-p
V
–
kHz
–
kHz
–
5
%
–
dBc
–
dBc
–
dBc
Notes: 30. The first amplifier stage has nominal gain of 15dB, the second stage has nominal gain of 22dB.
30a. In-band intermodulation calculated from output signal assuming 50Ω impedance; see also section
8.1.7.
31. Eight VGA steps.
32. Assumes the recommended external capacitors are used (see section 5.2.2).
33. Assuming external resistors with 1% tolerance and external capacitors with 5% tolerance.
34. Tested at maximum gain setting of VGA.
35. Assuming two 200mVp-p tones at 25kHz and 50kHz.
36. Assuming two 60mVp-p tones at 25kHz and 50kHz.
37. The post mixer filter bandwidth will vary with VGA setting. This may typically be 30%, with
the bandwidth reducing at lower gain settings.
 2015 CML Microsystems Plc
Page 57 of 70
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