LTC5555 1.5GHz to 7GHz Programmable Gain Downconverting Mixer FEATURES DESCRIPTION n Optimized Gain Flatness from 2.5GHz to 7GHz The LTC 5555 programmable gain downconverting mixer n 31dBm Output IP3 is ideal for receivers that require precise gain setting. The n IC incorporates an active mixer and a digital IF VGA with 9dB Power Conversion Gain n 15.5dB gain control range. The IF gain is programmed in 15.5dB Adjustable Gain Range n 0.5dB steps through the SPI or parallel interface. SPI or Parallel Gain Control in 0.5dB Steps n Very Small Solution Size An enable pin allows for fast turn-on and shutdown. n 3.3V Single Supply Areduced power modes is also available. n Low Power and Shutdown Modes An integrated RF transformer provides a single-ended 50 n 28-Lead (4mm 5mm) QFN Package input. The differential LO input is designed for single-ended or differential drive. The differential IF output simplifies the APPLICATIONS interface to differential IF filters and amplifiers. The mixer is optimized for the 3GHz to 7GHz RF frequency range but n 3.6GHz, 4.8GHz and 5.8GHz Band Wireless may be used down to 1.5GHz with degraded performance. Infrastructure Receivers All registered trademarks and trademarks are the property of their respective owners. n Wireless Repeaters n Military Radar and Communications Receivers n Test and Measurement Equipment n Software-Defined Radios TYPICAL APPLICATION Receiver with Programmable 0.5dB Gain Steps LTC5555 Conversion Gain vs RF Frequency and IF Attenuation LPF (0.5dB Gain Steps) 10 3.3V 8 3.3V 6 4 BPF LTC6430 RF 2 BPF + LNA IF 0 IF 2 IF 4 + LO LO 6 LO LO CLK 8 SPI SDI MUX 10 SDO 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 RF INPUT FREQUENCY (GHz) LTC5555 5555 TA01b CSB LATCH 5555 TA01a PARALLEL PS DATA (5 BITS) Rev. 0 1 Document Feedback For more information www.analog.com G (dB) CLTC5555 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2) + Supply Voltage (V , V , IF , IF ) .............................4V DD CC TOP VIEW EN Input Voltage ...............0.3V to V + 0.3V, 4V MAX CC + LO , LO Input Power (500MHz to 8GHz) .......... +10dBm 28 27 26 25 24 23 RF Input Power (1.5GHz to 7GHz) ......................+20dBm + GND 1 22 PS LO , LO DC Voltage .............................................0.5V AI 2 21 D0 IF DVGA Peak Differential Input Voltage ...................4V + AI 3 20 D1 PS Input Voltage ............. 0.3V to V + 0.3V, 4V MAX DD 29 EN 4 19 D2 GND SDI, CLK, CSB, RP, D Input X V 5 18 D3 CC + Voltages ....................... 0.3V to V + 0.3V, 4V MAX MO 6 17 D4 DD MO 7 16 GND SDO Voltage .................... 0.3V to V + 0.3V, 4V MAX DD GND 8 15 GND Operating Temperature Range (T ) ........ 40C to 105C C 9 10 11 12 13 14 Junction Temperature (T ) .................................... 150C J Storage Temperature Range .................. 65C to 150C UFD PACKAGE 28-LEAD (4mm 5mm) PLASTIC QFN T = 150C, = 6C/W JMAX JC EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION CASE TEMPERATURE RANGE LTC5555IUFD PBF LTC5555IUFD TRPBF 5555 28-Lead (4mm 5mm) Plastic QFN 40C to 105C Contact the factory for parts specified with wider operating temperature ranges. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev. 0 2 For more information www.analog.com + RF IF CSB IF CLK V DD + SDI LO SOO LO GND RP