LTC6406 3GHz, Low Noise, Rail-to-Rail Input Differential Ampli er/Driver FEATURES DESCRIPTION n Low Noise: 1.6nV/Hz RTI The LTC 6406 is a very low noise, low distortion, fully n Low Power: 18mA at 3V differential input/output ampli er optimized for 3V, single n Low Distortion (HD2/HD3): supply operation. The LTC6406 input common mode range 80dBc/69dBc at 50MHz, 2V is rail-to-rail, while the output common mode voltage is P-P 104dBc/90dBc at 20MHz, 2V independently adjustable by applying a voltage on the P-P n Rail-to-Rail Differential Input V pin. This makes the LTC6406 ideal for level-shifting OCM n 2.7V to 3.5V Supply Voltage Range signals with a wide common mode range for driving 12-bit n Fully Differential Input and Output to 16-bit single supply, differential input ADCs. n Adjustable Output Common Mode Voltage A 3GHz gain-bandwidth product results in 70dB linearity for n 800MHz 3dB Bandwidth with A = 1 V 50MHz input signals. The LTC6406 is unity-gain stable and n Gain-Bandwidth Product: 3GHz the closed-loop bandwidth extends from DC to 800MHz. n Low Power Shutdown The output voltage swing extends from near ground to n Available in 8-Lead MSOP and Tiny 16-Lead 2V, to be compatible with a wide range of ADC converter 3mm 3mm 0.75mm QFN Packages input requirements. The LTC6406 draws only 18mA, and has a hardware shutdown feature which reduces current APPLICATIONS consumption to 300A. n Differential Input ADC Driver The LTC6406 is available in a compact 3mm 3mm 16-pin n Single-Ended to Differential Conversion leadless QFN package as well as an 8-lead MSOP package, n Level-Shifting Ground-Referenced Signals and operates over a 40C to 85C temperature range. n Level-Shifting V -Referenced Signals CC L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n High Linearity Direct Conversion Receivers TYPICAL APPLICATION ADC Driver: Single-Ended Input to Differential Output with Common Mode Level Shifting Harmonic Distortion vs Frequency 30 1.8pF V = 3V S V = V = 1.25V OCM ICM 40 R = 800 LOAD V IN V = 2V 150 150 OUTDIFF P-P 50 DIFFERENTIAL INPUTS 3V 3V 60 2ND, R = R = 150 I F V DD 2ND, R = R = 500 I F 70 + +INA 3RD, R = R = 150 I F V OCM 3RD, R = R = 500 LTC22xx ADC I F LTC6406 80 1.25V INA + 90 GND 100 110 150 150 1 10 100 6406 TA01 FREQUENCY (MHz) 6406 TA01b 1.8pF 6406fc 1 DISTORTION (dBc)LTC6406 ABSOLUTE MAXIMUM RATINGS (Note 1) + Total Supply Voltage (V to V ) ................................3.5V Operating Temperature Range (Note 4) .... 40C to 85C Input Current Speci ed Temperature Range (Note 5) .... 40C to 85C +IN, IN, V , SHDN, V (Note 2) ...............10mA Junction Temperature ........................................... 150C OCM TIP Output Short-Circuit Duration (Note 3) ............ Inde nite Storage Temperature Range ................... 65C to 150C PIN CONFIGURATION TOP VIEW 16 15 14 13 TOP VIEW SHDN 1 12 V IN 11 8 +IN + + 9 V 2 11 V V 22 7 SHDN OCM 17 + + V 3 10 V V 33 6 V +OUT 44 5 OUT V V 4 9 OCM MS8E PACKAGE 5 6 7 8 8-LEAD PLASTIC MSOP T = 150C, = 40C/W, = 10C/W JMAX JA JC EXPOSED PAD (PIN 9) IS V , MUST BE SOLDERED TO PCB UD PACKAGE 16-LEAD (3mm 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 SPECIFIED LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC6406CUD PBF LTC6406CUD TRPBF LCTC 0C to 70C 16-Lead (3mm 3mm) Plastic QFN LTC6406IUD PBF LTC6406IUD TRPBF LCTC 16-Lead (3mm 3mm) Plastic QFN 40C to 85C LTC6406CMS8E PBF LTC6406CMS8E TRPBF LTCTB 8-Lead Plastic MSOP 0C to 70C LTC6406IMS8E PBF LTC6406IMS8E TRPBF LTCTB 8-Lead Plastic MSOP 40C to 85C 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: