LTC6404 600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifi er/Driver FEATURESDESCRIPTION n Fully Differential Input and Output The LTC®6404 is a family of AC precision, very low noise, n Low Noise: 1.5nV/√Hz RTI low distortion, fully differential input/output amplifi ers n Very Low Distortion: optimized for 3V, single supply operation. LTC6404-1(2VP-P , 10MHz): –91dBc The LTC6404-1 is unity-gain stable. The LTC6404-2 is LTC6404-2(2VP-P , 10MHz): –96dBc designed for closed-loop gains greater than or equal to LTC6404-4(2VP-P , 10MHz): –101dBc 2V/V. The LTC6404-4 is designed for closed-loop gains n Closed-Loop –3dB Bandwidth: 600MHz greater than or equal to 4V/V. The LTC6404 closed-loop n Slew Rate: 1200V/μs (LTC6404-4) bandwidth extends from DC to 600MHz. In addition to the n Adjustable Output Common Mode Voltage normal unfi ltered outputs (OUT+ and OUT–), the LTC6404 n Rail-to-Rail Output Swing has a built-in 88.5MHz differential single-pole lowpass n Input Range Extends to Ground fi lter and an additional pair of fi ltered outputs (OUTF+, n Large Output Current: 85mA (Typ) OUTF–). An input referred voltage noise of 1.5nV/√Hz n DC Voltage Offset < 2mV (Max) make the LTC6404 able to drive state-of-the-art 16-/18-bit n Low Power Shutdown ADCs while operating on the same supply voltage, saving n Tiny 3mm × 3mm × 0.75mm 16-Pin QFN Package system cost and power. The LTC6404 is characterized, and maintains its performance for supplies as low as 2.7V and APPLICATIONS can operate on supplies up to 5.25V. It draws only 27.3mA, and has a hardware shutdown feature which reduces cur- n Differential Input A/D Converter Driver rent consumption to 250μA. n Single-Ended to Differential Conversion/Amplifi cation n Common Mode Level Translation The LTC6404 family is available in a compact 3mm × 3mm n Low Voltage, Low Noise, Signal Processing 16-pin leadless QFN package and operates over a –40°C to 125°C temperature range. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIONSingle-Ended Input to Differential OutputLTC6404-4 Distortion vs Frequencywith Common Mode Level Shifting –40 VCM = VOCM = MID-SUPPLY 0.5VP-P –50 VS = 3V 0V VOUT = 2VP-P –60 RI = 100Ω, RF = 402Ω VS 50Ω 100Ω 402Ω –70 DIFFERENTIAL INPUT SINGLE-ENDED INPUT 3V –80 0.1μF 71.5Ω –90 SIGNAL 1V HD2 P-P GENERATOR HD2, HD3 (dBc) –100 + 1.5VDC HD2 –110 1.5VDC VOCM HD3 0.1μF –120 – HD3 1.5VDC –130 1V 130Ω P-P 0.1 1 10 100 402Ω 6404 TA01 FREQUENCY (MHz) 64044 G16 6404f 1
