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CMX991 Datasheet(PDF) 50 Page - CML Microcircuits

Part No. CMX991
Description  Two-mode demodulator
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Maker  CMLMICRO [CML Microcircuits]
Homepage  http://www.cmlmicro.com
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CMX991 Datasheet(HTML) 50 Page - CML Microcircuits

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RF Quadrature Transceiver / RF Quadrature Receiver
CMX991/CMX992
 2015 CML Microsystems Plc
50
D/991_992/20
IF Amplifier and I/Q Demodulator
Notes
Min.
Typ.
Max.
Units
Gain
10, 17
43
dB(V/V)
Noise Figure
10, 11
13
dB
Third Order Intercept Point (Input)
10, 17
-20
dBm
Input Frequency Range
10
150
MHz
LO Frequency Range
12
40
600
MHz
Input Impedance
15
1800
Ω
Output Impedance
20
Ω
LO Leakage at Input
-27
dBm
1dB Compression Point
13
-25
dBm
VGA Control Range
14
48
dB
VGA Step Size
4
6
8
dB
VGA Response Time
E
10
µs
Image Rejection (I/Q Gain/Phase matching)
30
40
dB
I/Q Output Bandwidth (-3dB)
1MHz Mode
16
1
1.4
MHz
100kHz Mode
100
135
kHz
Notes:
10. Measured from an un-
matched 50Ω input source to a differential I or Q output voltage; test
frequency = 45MHz. Note that values include combined response of IF amplifier, I/Q
demodulator and I/Q filter stages; see also section 7.7 for further details.
11. At maximum VGA setting (0dB); see section 7.7 for further details.
12. LO Supplied at four times the IF frequency.
13. At maximum gain
, input terminated with 50Ω resistor.
14. Eight VGA steps.
15. Based on single ended input at 45MHz.
16. In 1MHz output mode an IF output in the range 450kHz to 465kHz is supported.
17. Gain reduces at higher IFs.
I/Q Filters
Notes
Min.
Typ.
Max.
Units
Gain
20
N/A
dB(V/V)
Noise Figure
20
N/A
dB
Third Order Intercept Point (Input)
20
N/A
dBm
Output Impedance
20
N/A
Ω
Output Anti-alias Filter Stop-band
1.92
MHz
Stop-band Attenuation
55
dB
Data Filter Bandwidth (-3dB)
100
kHz
Differential Output Voltage Swing
21
4
Vp-p
Notes:
20. Performance included in overall performance of I/Q Demodulator.
21. This is the maximum swing to guarantee meeting the third order distortion characteristics
under the specified conditions and is not the maximum limiting value. For clarity, this
means that the device has the capability to produce +/-1V on each of the differential
outputs. The outputs are capable of driving a load resistance across the differential
outputs of 1k
Ω. This voltage output capability provides easy interfacing to other CML
devices, like the CMX981, which has a maximum input signal amplitude of 2.4Vp-p.


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