LTC6400-8 2.2GHz Low Noise, Low Distortion Differential ADC Driver for DC-300MHz FEATURES DESCRIPTION n 2.2GHz 3dB Bandwidth The LTC 6400-8 is a high-speed differential ampli er tar- n Fixed Gain of 2.5V/V (8dB) geted at processing signals from DC to 300MHz. The part n 99dBc IMD3 at 70MHz (Equivalent OIP3 = 53.4dBm) has been speci cally designed to drive 12-, 14- and 16-bit n 61dBc IMD3 at 300MHz (Equivalent OIP3 = 34.8dBm) ADCs with low noise and low distortion, but can also be n 1nV/Hz Internal Op Amp Noise used as a general-purpose broadband gain block. n 7.6dB Noise Figure The LTC6400-8 is easy to use, with minimal support cir- n Differential Inputs and Outputs cuitry required. The output common mode voltage is set n 400 Input Impedance using an external pin, independent of the inputs, which n 2.85V to 3.5V Supply Voltage eliminates the need for transformers or AC-coupling ca- n 85mA Supply Current (255mW) pacitors in many applications. The gain is internally xed n 1V to 1.6V Output Common Mode, Adjustable at 8dB (2.5V/V). n DC- or AC-Coupled Operation n The LTC6400-8 saves space and power compared to al- Max Differential Output Swing 4.8V P-P n ternative solutions using IF gain blocks and transformers. Small 16-Lead 3mm 3mm 0.75mm QFN Package The LTC6400-8 is packaged in a compact 16-lead 3mm 3mm QFN package and operates over the 40C to 85C APPLICATIONS temperature range. n L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Differential ADC Driver All other trademarks are the property of their respective owners. n Differential Driver/Receiver n Single Ended to Differential Conversion n IF Sampling Receivers n SAW Filter Interfacing TYPICAL APPLICATION 3.3V 3.3V Equivalent Output IP3 vs Frequency 70 (NOTE 7) C2 C1 C F2 0.1F 1000pF 33pF 60 + V C3 R R 50 S1 S3 0.1F 15 10 V + DD +OUT AIN V +IN IN 40 R1 C4 L1 C F1 LTC6400-8 LTC2208 59.0 30 R R 0.1F S2 24nH 33pF S4 15 10 IN OUT AIN V 20 V CM OCM R2 C F3 COILCRAFT 27.4 33pF LTC2208 V 10 0603CS 130Msps 1.25V 16-Bit ADC 64008 TA01a 0 0 50 100 150 200 250 300 C5 R3 0.1F 100 FREQUENCY (MHz) 64008 TA01b 64008f 1 OUTPUT IP3 (dBm)LTC6400-8 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW Supply Voltage (V V ) ......................................3.6V CC EE Input Current (Note 2) ..........................................10mA 16 15 14 13 Operating Temperature Range + V 1 12 V (Note 3) ............................................... 40C to 85C V 2 11 ENABLE OCM 17 + + V 3 10 V Speci ed Temperature Range V V 4 9 (Note 4) ............................................... 40C to 85C 5 6 7 8 Storage Temperature Range ................... 65C to 150C Maximum Junction Temperature........................... 150C UD PACKAGE 16-LEAD (3mm s 3mm) PLASTIC QFN T = 150C, = 68C/W, = 7.5C/W JMAX JA JC EXPOSED PAD (PIN 17) IS V , MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC6400CUD-8 PBF LTC6400CUD-8 TRPBF LCCQ 0C to 70C 16-Lead (3mm 3mm) Plastic QFN LTC6400IUD-8 PBF LTC6400IUD-8 TRPBF LCCQ 40C to 85C 16-Lead (3mm 3mm) Plastic QFN Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: