MAX2511 19-1209 Rev 0 10/97 Low-Voltage IF Transceiver with Limiter and RSSI General Description Features The MAX2511 is a complete, highly integrated IF trans- Single +2.7V to +5.5V Supply ceiver for applications employing a dual-conversion Complete Receive Path: architecture. Alternatively, the MAX2511 can be used 200MHz to 440MHz (first IF) to as a single-conversion transceiver if the RF operating 8MHz to 13MHz (second IF) frequency ranges from 200MHz to 440MHz. In a typical application, the receiver downconverts a Limiter with Differential Outputs (adjustable level) high IF/RF (200MHz to 440MHz) to a 10.7MHz low IF RSSI Function with 90dB Monotonic Dynamic using an image-reject mixer. Functions include an Range image-reject downconverter with 34dB of image sup- pression followed by an IF buffer that can drive an off- Complete Transmit Path: chip IF filter an on-chip limiting amplifier offering 90dB 8MHz to 13MHz (second IF) to of monotonic received-signal-strength indication (RSSI) 200MHz to 440MHz (first IF) and a robust limiter output driver. The transmit image- On-Chip Oscillator with Voltage Regulator reject mixer generates a clean output spectrum to mini- and Buffer mize filter requirements. It is followed by a 40dB variable-gain amplifier that maintains IM3 levels below Advanced System Power Management -35dBc. Maximum output power is 2dBm. A VCO and (four modes) oscillator buffer for driving an external prescaler are 0.1A Shutdown Supply Current also included. The MAX2511 operates from a 2.7V to 5.5V supply and includes flexible power-management control. Supply Ordering Information current is reduced to 0.1A in shutdown mode. PART TEMP. RANGE PIN-PACKAGE For applications using in-phase (I) and quadrature (Q) MAX2511EEI -40C to +85C 28 QSOP baseband architecture for the transmitter, Maxim offers a corresponding transceiver product: the MAX2510. The MAX2510 has features similar to those of the Pin Configuration MAX2511, but upconverts I/Q baseband signals using a quadrature upconverter. TOP VIEW Applications LIMIN 1 28 VREF PWT1900 Wireless Handsets and CZ 2 27 MIXOUT Base Stations CZ 3 26 GND PACS, PHS, DECT and Other PCS RSSI 4 25 RXIN Wireless Handsets and Base Stations GC 5 24 TXOUT MAX2511 400MHz ISM Transceivers TANK 6 23 TXOUT IF Transceivers GND 7 22 RXIN Wireless Data Links V 21 8 V CC CC TANK 9 20 GND GND V 10 19 CC V 11 18 TXEN CC OSCOUT 12 17 RXEN LIMOUT 13 TXIN 16 Typical Operating Circuit appears at end of data sheet. LIMOUT 14 15 TXIN QSOP Maxim Integrated Products 1 For free samples & the latest literature: Low-Voltage IF Transceiver with Limiter and RSSI ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.3V to 8.0V RXEN, TXEN, GC Input Current ............................................1mA CC V to Any Other V ........................................................0.3V RSSI Voltage...............................................-0.3V to (V + 0.3V) CC CC CC TXIN, TXIN Input Voltage............................-0.3V to (V + 0.3V) Continuous Power Dissipation (T = +70C) CC A TXIN to TXIN Differential Voltage....................................300mV QSOP (derate 11mW/C above 70C) ...........................909mW RXIN, RXIN Input Voltage ........................................-0.3V to 1.6V Operating Temperature Range TANK, TANK Voltage...............................................-0.3V to 2.0V MAX2511EEI......................................................-40C to +85C LIMIN Voltage .............................(VREF - 1.3V) to (VREF + 1.3V) Junction Temperature......................................................+150C LIMOUT, LIMOUT Voltage ..............(V - 1.6V) to (V + 0.3V) Storage Temperature Range .............................-65C to +165C CC CC RXEN, TXEN, GC Voltage...........................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10sec) .............................+300C CC Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (V = +2.7V to +5.5V, 0.01F across CZ and CZ TANK = TANK MIXOUT tied to VREF through a 165W resistor GC open, RXIN = CC RXIN TXOUT = TXOUT = V T = -40C to +85C, unless otherwise noted. Typical values are at T = +25C.) CC A A PARAMETER CONDITIONS MIN TYP MAX UNITS Operating Voltage Range 2.7 3.0 5.5 V Digital Input Voltage High RXEN, TXEN 2.0 V Digital Input Voltage Low RXEN, TXEN 0.4 V Digital Input Current High 23 32 A Digital Input Current Low -5 -1 A Rx mode, RXEN = high, 24 TXEN = low Tx mode, RXEN = low, 26 mA TXEN = high, V = 0.5V GC V = 3.0V CC Typical Supply Current T = +25C A Standby mode, RXEN = high, 9.5 TXEN = high Shutdown mode, RXEN = low, 0.1 A TXEN = low Rx mode, RXEN = high, 38.5 TXEN = low Tx mode, RXEN = low, 45 mA TXEN = high, V = 0.5V GC V = 2.7V to 5.5V, CC Worst-Case Supply Current T = -40C to +85C A Standby mode, RXEN = high, 14.5 TXEN = high Shutdown mode, RXEN = low, 5 A TXEN = low V / 2 - V / 2 V / 2 + CC CC CC VREF Voltage (Note 1) V 100mV 100mV LIMOUT, LIMOUT kW 2 Differential Output Impedance kW GC Input Resistance Internally terminated to 1.35V 60 80 125 2 MAX2511