MAX2411A Datasheet | Maxim Integrated

Description The MAX2411A performs the RF front-end transmit/ receive function in time-division-duplex (TDD) munication systems. It operates over a wide frequency range and is optimized for RF frequencies around 1.9GHz. Applications include most popular cordless and PCS standards. The MAX2411A includes a low-noise amplifier (LNA), a downconverter mixer, a local-oscillator buffer, an upconverter mixer, and a variable-gain power-amplifier (PA) driver in a low-cost, plastic surface-mount package. The MAX2411A’s unique bidirectional, differential IF port reduces cost and ponent count by allowing the transmit and receive paths to share the same IF filter. The LNA has a 2.4d B typical noise figure and a -10d Bm input third-order intercept point (IP3). The downconverter mixer has a low 9.2d B noise figure and 4d Bm input IP3. Image and local-oscillator filtering are implemented off-chip for maximum flexibility. The PA driver amplifier has 15d B of gain, which can be reduced over a 35d B range. Power consumption is only 60m W in receive mode and 90m W in transmit mode and drops to less than 3µW in shutdown mode. For applications requiring separate, single-ended IF input and output ports, refer to the MAX2410 data sheet. For applications requiring only a receive function, Maxim offers a low-cost downconverter with LNA (see the MAX2406 data sheet). ________________________Applications PWT1900 DECT DCS1800/PCS1900 ISM-Band Transceivers PHS/PACS Iridium Handsets Typical Operating Circuit appears on last page. Functional Diagram LNAOUT RXMXIN LNAIN RX MIXER RXEN POWER TXEN MANAGEMENT MAX2411A PADROUT PA DRIVER TX MIXER GC PADRIN TXMXOUT ____________________________Features o Low-Cost Silicon Bipolar Design o Integrated Upconvert/Downconvert Function o Operates from a Single +2.7V to +5.5V Supply o 3.2d B bined Receiver Noise Figure: 2.4d B (LNA) 9.2d B (mixer) o Flexible Power-Amplifier Driver: 18d Bm Output Third-Order Intercept (OIP3) 35d B...