LT6604-5 Dual Very Low Noise, Differential Ampli er and 5MHz Lowpass Filter FEATURES DESCRIPTION n Dual Differential Ampli er with 5MHz Lowpass Filters The LT 6604-5 consists of two matched, fully differential 4th Order Filters ampli ers, each with a 4th order, 5MHz lowpass lter. The Approximates Chebyshev Response xed frequency lowpass lter approximates a Chebyshev Guaranteed Phase and Gain Matching response. By integrating a lter and a differential ampli- Resistor-Programmable Differential Gain er, distortion and noise are made exceptionally low. At n >82dB Signal-to-Noise (3V Supply, 2V Output) unity gain, the measured in-band signal-to-noise ratio is P-P n Low Distortion (1MHz, 2V Output, 800 Load) an impressive 82dB. At higher gains, the input referred P-P HD2: 93dBc noise decreases, allowing the part to process smaller HD3: 96dBc input differential signals without signi cantly degrading n Speci ed for Operation with 3V, 5V and 5V Supplies the signal-to-noise ratio. n Fully Differential Inputs and Outputs Gain and phase are well matched between the two chan- n Adjustable Output Common Mode Voltage nels. Gain for each channel is independently programmed n Small 4mm 7mm 0.75mm QFN Package using two external resistors. The LT6604-5 enables level shifting by providing an adjustable output common mode voltage, making it ideal for directly interfacing to ADCs. APPLICATIONS The LT6604-5 is fully speci ed for 3V operation. The dif- n Dual Differential ADC Driver and Filter ferential design enables outstanding performance at a n Single-Ended to Differential Converter 2V signal level for a single 3V supply. P-P n Matched, Dual, Differential Gain or Filter Stage See the back page of this datasheet for a complete list of n Common Mode Translation of Differential Signals related single and dual differential ampli ers with integrated n High Speed ADC Antialiasing and DAC Smoothing in 2.5MHz to 20MHz lowpass lters. Wireless Infrastructure or Networking Applications L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other n High Speed Test and Measurement Equipment trademarks are the property of their respective owners. n Medical Imaging TYPICAL APPLICATION 3V Channel to Channel Gain Matching 25 LT6604-5 + LTC22xx DUAL ADC 50 TYPICAL UNITS V A 3V T = 25C 806 A +INA 50 GAIN = 1 + OUTA 20 V f = 5MHz MIDA IN 18pF V AIN DOUT OCMA 50 0.01F +OUTA + 15 INA + 806 ++ VV BB 3V 806 10 +INB 50 + OUTB V MIDB V 18pF AIN DOUT 5 OCMB 50 0.01F +OUTB + INB + 806 V 0 0.20 0.10 0 0.10 0.20 66045 TA01 GAIN MATCH (dB) 66045 TA01b 66045fa 1 NUMBER OF UNITS + +LT6604-5 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW Total Supply Voltage .................................................11V Operating Temperature Range (Note 6)....40C to 85C Speci ed Temperature Range (Note 7) ....40C to 85C Junction Temperature ........................................... 150C NC 1 30 NC Storage Temperature Range ...................65C to 150C +INA 2 29 OUTA Input Current NC 3 28 NC +IN, IN, V , V (Note 8) ........................10mA INA 4 27 +OUTA OCM MID NC 5 26 NC + V 6 25 V A OCMA V 7 24 V 35 V 8 23 NC MIDB NC 9 22 NC +INB 10 21 OUTB NC 11 20 NC INB 12 19 +OUTB NC 13 18 NC UFF PACKAGE 34-LEAD (4mm s 7mm) PLASTIC QFN T = 150C, = 43C/W, = 4C/W JMAX JA JC EXPOSED PAD (PIN 35) IS V , MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT6604CUFF-5 PBF LT6604CUFF-5 TRPBF 66045 0C to 70C 34-Lead (4mm 7mm) Plastic QFN LT6604IUFF-5 PBF LT6604IUFF-5 TRPBF 66045 40C to 85C 34-Lead (4mm 7mm) 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: