CMX991 Datasheet, PDF (52/56 Pages) CML Microcircuits – Two-mode demodulator

RF Quadrature Transceiver / RF Quadrature Receiver
CMX991/CMX992
8.1.3.3 AC Parameters - Transmitter
I/Q Modulator
Input Signal Level
Gain Control Steps
Input Common Mode Range
Input Voltage Range (on each input)
Third Order IMD Products
IMD Products (greater than third order)
Carrier Leakage
Image Suppression
I or Q Modulation Bandwidth (-3dB)
Notes
40
41
42
Min.
–
–
V_SS+1.0
V_SS+0.5
–
–
–
–
–
Typ.
2.0
+6, 0, -6
V_DD/2
–
–
–
-30
-40
–
Max.
–
–
V_DD-1.0
V_DD-0.5
-50
-60
–
-30
1
Units
Vp-p
dB
V
V
dBc
dBc
dBc
dBc
MHz
Notes:
40. The 2.0Vp-p is a differential signal. For clarity, this means +/-0.5V on each input.
41. The common mode range is based on a 2.0Vp-p differential input signal level.
42. This is the maximum modulation frequency that should be applied in the I or Q channel.
The bandwidth of the modulator is much higher than this but use of higher modulation
frequencies may result in an increase in distortion products.
Post Modulator Filter
Selectable Filter Bandwidth
Gain
Stopband (45MHz Mode)
>135MHz
Stopband (60MHz Mode)
>170MHz
Stopband (90MHz Mode)
>270MHz
Stopband (120MHz Mode)
>360MHz
Tx IF Output
Frequency Range
Output Signal Level
Wideband Noise at 1MHz
Output Impedance
Notes
45
46
Min.
–
–
–
–
–
–
45
–
–
–
Typ.
45, 60,
90, 120
-2
30
30
30
30
–
-10
-142
50
Max.
–
–
–
–
–
–
120
–
–
–
Units
MHz
dB
dB
dB
dB
dB
MHz
dBm
dBc/Hz
Ω
Notes:
45. At pin TXIFOUT.
46. For specified I/Q Modulator Input Signal Level.
 2015 CML Microsystems Plc
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