National LMX2240 Data Sheet/Manual
Summary
This datasheet from National Semiconductor (April 1995) covers the LMX2240 monolithic intermediate frequency receiver fabricated on the ABiC IV BiCMOS process with an fT of 15 GHz, designed for Digital European Cordless Telecommunications (DECT) systems. Operating at a typical frequency of 110 MHz, the device integrates a 70 dB gain limiting amplifier, a frequency discriminator, and an RSSI with sensitivity to minus 82 dBm, all operating in the 40 MHz to 150 MHz frequency range. The average curr
Manual Details
| Brand | National |
|---|---|
| Pages | 12 |
| File Size | 209.79 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
How can I monitor the channel quality using this device?
Channel quality monitoring can be performed by utilizing the voltage output from the Received Signal Strength Indicator (RSSI) on Pin 2.
What functional signals does Pin 1 manage?
Pin 1 (PD) is the Power Down pin; applying a HIGH signal switches the part into power down mode for current savings.
What are the main applications of the LMX2240 IF Receiver?
It supports DECT receivers, WLANs, portable wireless communications (PCS/PCN), and digital cellular telephone systems.
Is this frequency receiver suitable for mobile telephony systems?
Yes, it is recommended for digital cellular telephone systems with channel bandwidths between 300 kHz to 2.5 MHz.