MAX2411 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). MAX2411A _______________Ordering Information PART MAX2411AEEI MAX2411AE/D TEMP. RANGE -40°C to +85°C -40°C to +85°C PIN-PACKAGE 28 QSOP Dice- - Dice are specified at TA = 25°C, DC parameters only. ________________________Applications PWT1900 DCS1800/PCS1900 PHS/PACS DECT ISM-Band Transceivers Iridium Handsets TOP VIEW GND 1 LNAIN 2 GND 3 Pin Configuration 28 GND 27 LNAOUT 26 GND Typical Operating Circuit appears on last page. Functional Diagram LNAOUT RXMXIN RX MIXER LNAIN RXEN TXEN PADROUT LNA IF IF LO LO GND 4 VCC 5 RXEN 6 LO 7 LO 8 TXEN 9 VCC 10 GC 11 GND 12 MAX2411A 25 GND 24 RXMXIN 23 GND 22 IF 21 IF 20 GND 19 TXMXOUT 18 GND...