CMX994 Datasheet, PDF (4/61 Pages) CML Microcircuits – Local Oscillator

Direct Conversion Receivers
Table
Table 1 Definition of Power Supply and Reference Voltages
Table 2 Decoupling Components
Table 3 LNA S11 and S22 Impedances and Parallel Equivalent Circuit in 50Ω
Table 4 LNA S11 and S22 Impedances and Parallel Equivalent Circuit in 100Ω Mode
Table 5 150MHz LNA and Inter-stage Components (100Ω output mode)
Table 6 450MHz LNA and Inter-stage Components (100Ω output mode)
Table 7 900MHz LNA and Inter-stage Components (50Ω output mode)
Table 8 CMX994 Rx Mixer Input Impedances and Parallel Equivalent Circuit
Table 9 CMX994A/CMX994E Rx Mixer Input Impedances and Parallel Equivalent Circuit
Table 10 Receiver Components
Table 11 Internal VCO Amplifier Tank Circuit for 440MHz Operation
Table 12 3rd Order Loop Filter Circuit Values
Table 13 Tx (or Rx) Enable Operation
Table 14 DC OffsetCorrection Adjustments
Table 15 Typical LNA Gain Step Sizes at 100MHz, ZO=100Ω
Table 16 Typical LNA Gain Step Sizes at 450MHz, ZO=100Ω
Table 17 Typical LNA Gain Step Sizes at 940MHz, ZO=50Ω
Table 18 50MHz LNA and Inter-stage Components (100Ω mode)
Table 19 Summary of Results for the Complete Rx Chain at 50MHz
Table 20 Modulation/Modem Combinations
Figure
Figure 1 Block Diagram
Figure 2 Recommended Power Supply Connections and Decoupling
Figure 3 LNA S₁₁ (50Ω Mode)
Figure 4 LNA S₂₂ (50Ω Mode)
Figure 5 LNA S11 (100Ω Mode)
Figure 6 LNA S₂₂ (100Ω Mode)
Figure 7 Recommended LNA Configuration and Inter-stage Match
Figure 8 Rx Mixer Impedance
Figure 9 Recommended Receiver Circuit
Figure 10 Example External Components – VCO External Tank Circuit
Figure 11 Example External Components – PLL Loop Filter
Figure 12 Simplified Schematic of How DC Offset Corrections are Applied
Figure 13 Baseband I/Q Filtering
Figure 14 Schematic Representation of Filters Used in the I and Q Paths
Figure 15 Local Oscillator
Figure 16 C-BUS Transactions
Figure 17 CMX994 and CMX7164 with FI-2 – Typical 4FSK Sensitivity (19.2kbps)
Figure 18 I/Q Path DC Offsets
Figure 19 Example Variation in V_offset with Gain Control Setting
Figure 20 Gain Control
Figure 21 Variation of LNA Gain and IMD with IM Register Setting, 450MHz
Figure 22 I/Q Filter Response
Figure 23 Baseband Intermodulation Test at circa 6Vp-p Differential Output
Figure 24 External Baseband Circuit Connections to Mixer
Figure 25 Rx Mixer Output Bandwidth
 2015 CML Microsystems Plc
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