MAX2472/MAX2473 19-1466 Rev 0 6/99 500MHz to 2500MHz VCO Buffer Amplifiers General Description Features The MAX2472/MAX2473 are flexible, wideband, high- +2.7V to +5.5V Supply Range reverse-isolation buffer amplifiers. The MAX2472 has dual 500MHz to 2500MHz Input Frequency Range open-collector outputs capable of delivering -5dBm into 50 while maintaining harmonic suppression below High Reverse Isolation: 49dB at 900MHz -25dBc. The MAX2473 has a single open-collector output Dual Open-Collector Outputs (MAX2472) with a bias control pin to vary output power from -10dBm to -2dBm while maintaining harmonic suppression below Adjustable -10dBm to -2dBm Output Power -25dBc. The MAX2472/MAX2473s combination of high Control (MAX2473) reverse isolation and low supply current makes them ideal High Input Impedance: >250 at 900MHz for applications requiring high performance with low power. They feature high input impedance and open-col- Ultra-Small SOT23-6 Package lector outputs for maximum flexibility, enabling them to be used with a variety of oscillator topologies. Ordering Information Both the MAX2472 and MAX2473 operate from a single +2.7V to +5.5V supply. With V = +3.0V and -25dBm CC TEMP. PIN- SOT input power, the MAX2472 consumes 5.2mA, while the PART RANGE PACKAGE TOP MARK MAX2473 consumes only 2.7mA. Both devices are avail- MAX2472EUT-T -40C to +85C 6 SOT23-6 AAAZ able in a tiny 6-pin SOT23 package requiring minimal board space. MAX2473EUT-T -40C to +85C 6 SOT23-6 AABA Applications Functional Diagrams Cellular and PCS Mobile Phones Private Mobile Radios V CC ISM-Band Applications BIAS IF/RF Oscillators OUT2 General-Purpose Buffers/Amplifiers MAX2472 IN Typical Operating Circuits appear at end of data sheet. OUT1 GND GND Pin Configuration V CC BIAS TOP VIEW BIAS OUT1 (OUT)16 V CC MAX2473 MAX2472 GND 2 5 GND MAX2473 IN OUT OUT2 (BIAS)34 IN GND GND SOT23-6 ( ) ARE FOR MAX2473. Maxim Integrated Products 1 For free samples & the latest literature: 500MHz to 2500MHz VCO Buffer Amplifiers ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +7V Operating Temperature Range ...........................-40C to +85C CC OUT1, OUT2, BIAS to GND........................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C CC Maximum BIAS Pin Current................................................150A Storage Temperature Range .............................-65C to +150C Maximum Input Power....................................................+10dBm Lead Temperature (soldering, 10sec) .............................+300C Continuous Power Dissipation SOT23-6 (derate 8.7mW/C above +70C)...................696mW 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, P = -25dBm, IN driven from a 50 source, OUT LC-matched to 50, T = T to T , unless otherwise IN CC A MIN MAX noted. Typical values are at V = +3V, T = +25C.) (Note 1) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V 2.7 5.5 V CC MAX2472 5.2 8.0 MAX2473, R = 23k 2.7 BIAS MAX2473, R = 11k 4.8 BIAS Supply Current I mA CC MAX2472 5.1 No drive MAX2473, R = 23k 2.5 BIAS MAX2473, R = 11k 4.3 BIAS AC ELECTRICAL CHARACTERISTICSMAX2472 (Typical Operating Circuits, V = +3V, P = -25dBm, IN driven from a 50 source, OUT1 and OUT2 LC matched to 50, T = CC IN A +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Frequency Range (Note 2) f 500 2500 MHz IN f = 600MHz 14.0 IN f = 900MHz, T = +25C 7.8 10.2 12.2 IN A Transducer Gain 2 S f = 900MHz, T = T to T (Note 3) 6.6 14.6 dB 21 A MIN MAX IN (IN to OUT2) f = 1900MHz 7.5 IN f = 2400MHz 6.0 IN f = 600MHz 13.0 IN f = 900MHz 9.2 Transducer Gain IN 2 S dB 21 (IN to OUT1) f = 1900MHz 6.8 IN f = 2400MHz 5.3 IN Output 1dB Compression Point P f = 900MHz -3.2 dBm OUT1dB IN f = 600MHz 43 IN f = 900MHz 40 Reverse Isolation IN 2 S dB 12 (IN to OUT2) f = 1900MHz 30 IN f = 2400MHz 26 IN 2 MAX2472/MAX2473