RF Quadrature Transceiver / RF Quadrature Receiver
CMX991/CMX992
1.1
History
Version Changes
Date
18
May 2012
Various editorial corrections.
Alternative diodes added in Table 11.
17
16
Feb 2012
Jun 2011
VCO N divider start-up issue when using an external VCO (section 4.5)
Clarification of gain and noise of IF stage in ‘Straight in’ case (section 7.7)
Editorial changes for consistency of table header format
Update of receiver gain partition (section 7.3.1)
15
Mar 2011
Details of receiver gain switching added (Section 7.3.2)
PLL frequency formula added (section 5.4.1)
Phase noise formula typo corrected (M not N) (section 8.1.3.2 Note 94)
CMX991: Transmitter LO Leakage specification clarified and limits adjusted
CMX991: Transmitter LO Image typical value updated
Transmitter I and Q channels shown in error causing a spectrum inversion in
Tx path. Pins TXQN and TXQP swapped (Table 1)
14
13
Dec 2010
Sep 2010
Editorial error in Table 13 corrected.
12
11
Jun 2010
Mar 2010
Rx IMD minimum specification improved after evaluation of production test
fixture (section 8.1.3.2)
Redundant series capacitor deleted and separate capacitors shown for C3 in
Figure 7 and Table 5
Extra information on Mixer Output Impedance added (section 7.6).
Table 13 updated.
Extra information added on IF gain measurement conditions in (section 7.7).
Extra information added on Rx I/Q Filter, (section 7.10).
Extra information added on Tx Filter, (section 7.12).
Maximum limits added for ‘Total Current Consumption’ figures’, (Section
8.1.3.1)
LO Leakage performance specification updated; clarification of Note 7 and 7a;
new Note 7b; reference corrected in Note 11; test frequency of 45MHz moved
from Note 17 to Note 10; Gain of I/Q Filter moved to overall IF Amplifier and
I/Q Demodulator table (Section 8.1.3.2).
10
9
Jan 2010
Nov 2009
PLL Phase noise specification corrected and definition added
I/Q Bandwidth clarified in section 4.2.3.2.
VCO specification corrected. It should be 400MHz (max).
dBV/V terminology clarified. It should be dB(V/V)
Clarification of Rx 1st Mixer Input 3rd order Intercept Point measurement
Correction to C5 in Figure 7, the circuit referenced in IIP3 measurement
Updated with further application information (e.g. IF VCO options).
Updated with enhanced application information.
8
7
6
July 2009
May 2009
Mar 2009
Original published document for both the CMX991 and CMX992 devices.
It is always recommended that you check for the latest product datasheet version from the CML website:
[www.cmlmicro.com].
2012 CML Microsystems Plc
6
D/991_992/18
CMLMICRO [ CML MICROCIRCUITS ]
