LTC5556 1.5GHz to 7GHz Dual Programmable Gain Downconverting Mixer FEATURES DESCRIPTION n 9dB Power Conversion Gain The LTC 5556 dual programmable gain downconvert- n 32dBm Output IP3 ing mixer is ideal for diversity and MIMO receivers that n require precise gain setting. Each channel incorporates 15.5dB Range IF DVGA in 0.5dB Steps n an active mixer and a digital IF VGA with 15.5dB gain IF Frequency Range Up to 900MHz n control range. The IF gain of each channel is programmed Reduced Power Mode n in 0.5dB steps through the SPI. 3.3V Single Supply n Simple SPI for Fast Development Enable pins for each channel allow fast turn-on and shut- n 40C to 105C Operation (T ) C down. A reduced power mode is also available. n Very Small Solution Size The device has the same functionality as the LTC5566, n 32-Lead (5mm 5mm) QFN Package but the mixers are optimized for a higher 3GHz to 7GHz RF frequency range and the IF is optimized for use up to APPLICATIONS 900MHz. The mixers may be used down to 1.5GHz, or up n 4G and 5G MIMO Receivers to 8GHz with degraded performance. n 5.1GHz to 5.9GHz LTE-U Dual Programmable Gain Downconverting Mixers n Distributed Antenna Systems (DAS) PART NUMBER OPTIMUM RF RANGE IF RANGE n Network Test/Monitoring Equipment LTC5556 3GHz to 7GHz 1MHz to 900MHz n Fixed Satellite Services LTC5566 300MHz to 4.5GHz 1MHz to 500MHz All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION Dual Channel MIMO Receiver with Programmable 0.5dB Gain Steps LTC5556 Conversion Gain vs LPF RF Frequency and IF Attenuation (0.5dB Gain Steps) 3.3V 10 3.3V 8 LTC5556 BPF 6 LTC6430 RF1 BPF + LNA IF1 4 IF1 2 IF1 0 + LO LO LO CSB 2 CLK LO SPI 4 SDI SDO LO 6 LTC6430 IF = 270MHz BPF 8 IF2 LOW SIDE LO BPF IF2 10 RF2 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 + IF2 LNA RF INPUT FREQUENCY (GHz) 5556 TA01b 5556 TA01a 3.3V 3.3V Rev 0 1 Document Feedback For more information www.analog.com G (dB) CLTC5556 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2) + TOP VIEW Supply Voltage (V , V , V , IF1 , IF1 , DD CC1 CC2 + IF2 , IF2 ) ...................................................................4V 32 31 30 29 28 27 26 25 + EN1, EN2 Input Voltages ..................0.3V to V + 0.3V CC GND 1 24 IF1 + RF1 2 23 IF1 LO , LO Input Power (500MHz to 8GHz) .......... +10dBm CSB 3 22 V DD RF1, RF2 Input Power (1.5GHz to 7GHz) ............+20dBm + CLK LO 4 21 33 + LO , LO DC Voltage ..............................................0.5V GND SDI 5 20 LO SDO 6 19 RP IF DVGA Peak Differential Input Voltage ....................4V RF2 7 18 IF2 SDI, CLK, CSB, RP Input Voltages .. 0.3V to V + 0.3V DD + GND 8 17 IF2 Operating Temperature Range (T ) ........ 40C to 105C C 9 10 11 12 13 14 15 16 Junction Temperature (T ) .................................... 150C J Storage Temperature Range .................. 65C to 150C UH PACKAGE 32-LEAD (5mm 5mm) PLASTIC QFN T = 150C, = 7.7C/W JMAX JC EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION CASE TEMPERATURE RANGE LTC5556IUH PBF LTC5556IUH TRPBF 5556 32-Lead (5mm 5mm) Plastic QFN 40C to 105C Consult ADI Marketing 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. ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. V = V = 3.3V. Test circuit shown in Figure 1. (Note 2) C CC DD PARAMETER CONDITIONS MIN TYP MAX UNITS l Supply Voltage (V ) 3.0 3.3 3.6 V CC SPI Supply Voltage (V ) l 1.6 3.6 V DD Supply Current (I ) One Channel, Full Power Mode 190 225 mA CC Both Channels, Full Power Mode 380 450 mA One Channel, Reduced Power Mode 145 mA Both Channels, Reduced Power Mode 290 mA Shutdown 1.2 1.9 mA SPI Supply Current (I ) Operating: CSB = Low, f =20MHz 0.3 1 mA DD CLK Idle: CSB = High 50 A Enable Logic Inputs (EN1, EN2) Internal Pull-Down Resistors on Each Pin Input High Voltage (On) l 1.4 V l Input Low Voltage (Off) 0.5 V Input Current V = V = 3.6V 100 A IN CC Enable Turn-On Time 0.3 s Enable Turn-Off Time 0.1 s Reduced Power Logic Input (RP) Internal Pull-Down Resistor l Input High Voltage (Reduced Power, Both Channels) 0.7 V V DD Input Low Voltage l 0.3 V V DD Input Current V = V = 3.6V 50 A IN DD Rev 0 2 For more information www.analog.com GND GND MO2 MO1 + + MO2 MO1 V V CC2 CC1 EN2 EN1 + + AI2 AI1 AI2 AI1 GND GND