LT6402-20 300MHz Low Distortion, Low Noise Differential Ampli er/ ADC Driver (A = 20dB) V DESCRIPTIO FEATURES 300 MHz 3dB Bandwidth The LT 6402-20 is a low distortion, low noise differential Fixed Gain of 20dB ampli er/ADC driver for use in applications from DC to Low Distortion: 300MHz. The LT6402-20 has been designed for ease of 51dBm OIP3, 81dBc HD3 (20MHz, 2V ) use, with minimal support circuitry required. Exceptionally P-P Low Noise: low input-referred noise and low distortion (with either 12.4dB NF, e = 1.9nV/Hz (20MHz) single-ended or differential inputs) make the LT6402-20 n Differential Inputs and Outputs an excellent solution for driving high speed 12-bit and Additional Filtered Outputs 14-bit ADCs. In addition to the normal un ltered outputs Adjustable Output Common Mode Voltage (+OUT and OUT), the LT6402-20 has a built-in 75MHz DC- or AC-Coupled Operation differential low pass lter and an additional pair of ltered Minimal Support Circuitry Required outputs (+OUTFILTERED, OUTFILTERED) to reduce Small 0.75mm Pro le 16-Lead 3mm 3mm QFN external ltering components when driving high speed Package ADCs. The output common mode voltage is easily set via the V pin, eliminating an output transformer or AC- OCM U coupling capacitors in many applications. APPLICATIO S The LT6402-20 is designed to meet the demanding require- Differential ADC Driver for: ments of communications transceiver applications. It can Imaging be used as a differential ADC driver, a general-purpose Communications differential gain block, or in other applications requiring Differential Driver/Receiver differential drive. The LT6402-20 can be used in data Single Ended to Differential Conversion acquisition systems required to function at frequencies Differential to Single Ended Conversion down to DC. Level Shifting IF Sampling Receivers The LT6402-20 operates on a 5V supply and consumes SAW Filter Interfacing/Buffering 30mA. It comes in a compact 16-lead 3mm 3mm QFN pack- , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. age and operates over a 40C to 85C temperature range. All other trademarks are the property of their respective owners. Distortion vs Frequency, Differential TYPICAL APPLICATIO Input, No R LOAD 40 FILTERED OUTPUTS V = 2V 5V OUT P-P 50 0.1F 60 0.1F INB V CC 70 V CM INA V 10 OCM + 0.1F +OUT AIN HD3 80 LT6402-20 LTC 2249 10 OUT AIN 0.1F +INB 90 IF IN V HD2 EE +INA 100 6402 TA01a 1 10 100 FREQUENCY (MHz) 64022 G08 640220fa 1 DISTORTION (dBc) U ULT6402-20 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW Total Supply Voltage (V /V /V to CCA CCB CCC V /V /V ) ...................................................5.5V EEA EEB EEC 16 15 14 13 Input Current (+INA, INA, +INB, INB, V 1 12 V CCC EEC V , ENABLE) ................................................10mA OCM V 2 11 ENABLE OCM 17 Output Current (Continuous) V 3 10 V CCA CCB +OUT, OUT ...................................................100mA V 4 9 V EEA EEB 5 6 7 8 +OUTFILTERED, OUTFILTERED ......................30mA Output Short Circuit Duration (Note 2) ............ Inde nite Operating Temperature Range (Note 3) ... 40C to 85C Speci ed Temperature Range (Note 4) .... 40C to 85C Storage Temperature Range ................... 65C to 125C UD PACKAGE 16-LEAD (3mm 3mm) PLASTIC QFN Junction Temperature ........................................... 125C T = 125C, = 68C/W, = 4.2C/W JMAX JA JC Lead Temperature Range (Soldering 10 sec) ........ 300C EXPOSED PAD IS V (PIN 17) EE MUST BE SOLDERED TO THE PCB ORDER PART NUMBER UD PART MARKING* LT6402CUD-20 LCBC LT6402IUD-20 LCBC Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: