LTC6400-14 2.4GHz Low Noise, Low Distortion Differential ADC Driver for 300MHz IF FEATURES DESCRIPTION n 2.4GHz 3dB Bandwidth The LTC 6400-14 is a high-speed differential ampli er n Fixed Gain of 5V/V (14dB) targeted at processing signals from DC to 300MHz. The n 97dBc IMD3 at 70MHz (Equivalent OIP3 = 52.4dBm) part has been speci cally designed to drive 12-, 14- and n 66dBc IMD3 at 300MHz (Equivalent OIP3 = 36.9dBm) 16-bit ADCs with low noise and low distortion, but can also n 1.1nV/Hz Internal Op Amp Noise be used as a general-purpose broadband gain block. n 2.5nV/Hz Total Input Noise The LTC6400-14 is easy to use, with minimal support n 7.5dB Noise Figure circuitry required. The output common mode voltage is n Differential Inputs and Outputs set using an external pin, independent of the inputs, which n 200 Input Impedance eliminates the need for transformers or AC-coupling ca- n 2.85V to 3.5V Supply Voltage pacitors in many applications. The gain is internally xed n 85mA Supply Current (255mW) at 14dB (5V/V). n 1V to 1.6V Output Common Mode Voltage, The LTC6400-14 saves space and power compared to Adjustable n alternative solutions using IF gain blocks and transformers. DC- or AC-Coupled Operation n The LTC6400-14 is packaged in a compact 16-lead 3mm Max Differential Output Swing 4.8V P-P n 3mm QFN package and operates over the 40C to 85C Small 16-Lead 3mm 3mm 0.75mm QFN Package temperature range. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. APPLICATIONS All other trademarks are the property of their respective owners. n Differential ADC Driver n Differential Driver/Receiver n Single Ended to Differential Conversion n IF Sampling Receivers n SAW Filter Interfacing TYPICAL APPLICATION Equivalent Output IP3 vs Single-Ended to Differential ADC Driver Frequency 70 (NOTE 7) 3.3V 3.3V 60 C2 C1 C F2 50 0.1F 1000pF 33pF + V C3 40 R R S1 S3 0.1F 15 10 V + DD +OUT AIN 30 V +IN IN R1 C4 L1 C F1 LTC6400-14 LTC2208 20 68.5 R R 0.1F S2 24nH 33pF S4 15 10 IN OUT AIN 10 V V CM OCM R2 C F3 COILCRAFT 29 33pF LTC2208 V 0 0603CS 130Msps 050 100 150 200 250 300 1.25V 16-Bit ADC FREQUENCY (MHz) 64014 TA01a 640020 TA01b C5 R3 0.1F 100 640014fb 1 OUTPUT IP3 (dBm)LTC6400-14 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW + Supply Voltage (V V ) .........................................3.6V 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 Lead Temperature (Soldering, 10 sec) .................. 300C UD PACKAGE 16-LEAD (3mm s 3mm) PLASTIC QFN T = 150C, = 68C/W, = 4.2C/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-14 PBF LTC6400CUD-14 TRPBF LCCR 0C to 70C 16-Lead (3mm 3mm) Plastic QFN LTC6400IUD-14 PBF LTC6400IUD-14 TRPBF LCCR 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: