LTC5599 30MHz to 1300MHz Low Power Direct Quadrature Modulator Fea T Descrip T n Frequency Range: 30MHz to 1300MHz The LTC 5599 is a direct conversion I/Q modulator de- n Low Power: 2.7V to 3.6V Supply 28mA signed for low power wireless applications that enable n Low LO Carrier Leakage: 51.5dBm at 500MHz direct modulation of differential baseband I and Q signals n Side-Band Suppression: 52.6dBc at 500MHz on an RF carrier. Single side-band modulation or side-band n Output IP3: 20.8dBm at 500MHz suppressed upconversion can be achieved by applying n Low RF Output Noise Floor: 156dBm/Hz at 6MHz 90 phase-shifted signals to the I and Q inputs. The I/Q Offset, P = 3dBm baseband input ports can be either AC or DC coupled to a RF n Sine Wave or Square Wave LO Drive source with a common mode voltage level of about 1.4V. n SPI Control: The SPI interface controls the supply current, modulator Adjustable Gain: 19dB to 0dB in 1dB Steps gain, and allows optimization of the LO carrier feedthrough Effecting Supply Current from 8mA to 35mA and side-band suppression, with sine wave or square I/Q Offset Adjust: 65dBm LO Carrier Leakage wave LO drive. A fixed LC network on the LO and RF ports I/Q Gain/Phase Adjust: 60dBc Side-Band Suppressed covers a continuous 90MHz to 1300MHz operation. An n 24-Lead QFN 4mm 4mm Package on-chip thermometer can be activated to compensate for gain-temperature variations. More accurate temperature measurements can be made using an on-chip diode. In a T addition, a continuous analog gain control (V ) pin CTRL n Wireless Microphones can be used for fast power control. n Battery Powered Radios L, LT, LTC, LTM, Linear Technology, and the Linear logo are registered trademarks and QuikEval is a trademark of Linear Technology Corporation. All other trademarks are the property n Ad-Hoc Wireless Infrastructure Networks of their respective owners. n White-Space Transmitters n Software Defined Radios (SDR) n Military Radios Typical a T EVM and Noise Floor vs RF Output 90MHz to 1300MHz Direct Conversion Transmitter Application Power and Digital Gain Setting with 1Ms/s 16-QAM Signal V CTRL 3.3V 10 1nF + 4.7F DG = 19 9 105 V LTC5599 CC DG = 16 8 DG = 12 SPI 7 DG = 8 115 DG = 4 6 RF = 90MHz DG = 0 5 125 to 1300MHz I-DAC V I I-CHANNEL 10nF 4 3 135 PA 2 0 1 145 EN 90 0 155 Q-DAC V I Q-CHANNEL 165 THERMOMETER TTCK 15 10 5 0 5 BASEBAND RF OUTPUT POWER (dBm) 5599 TA01b GENERATOR 39nH VCO/SYNTHESIZER 15pF 5599 TA01a 5599f 1 For more information www.linear.com/LTC5599 RMS EVM (%) ion pplica ions pplica ion uresLTC5599 a T e Maxi Mu M r a T p c F T (Note 1) TOP VIEW Supply Voltage .........................................................3.8V Common Mode Level of BBPI, BBMI, 24 23 22 21 20 19 and BBPQ, BBMQ ........................................................2V V 1 18 GNDRF CTRL LOL, LOC DC Voltage ............................................. 0.1V GND 2 17 GNDRF LOL, LOC Input Power (Note 15) ..........................20dBm GND LOL 3 16 RF Current Sink of TEMP, SDO ....................................10mA 25 LOC 4 15 GNDRF Voltage on Any Pin (Note 16) ...........0.3V to V + 0.3V CC GND 5 14 GNDRF T .................................................................... 150C JMAX TTCK 6 13 GNDRF Case Operating Temperature Range........40C to 105C 7 8 9 10 11 12 Storage Temperature Range .................. 65C to 150C UF PACKAGE 24-LEAD (4mm 4mm) PLASTIC QFN T = 150C, = 43C/W, = 4.5C/W (AT EXPOSED PAD) JMAX JA JC EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION CASE TEMPERATURE RANGE LTC5599IUF PBF LTC5599IUF TRPBF 5599 24-Lead (4mm 4mm) Plastic QFN 40C to 105C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: