LT6600CS8-15# PBF

The LT6600-15 combines a fully differential amplifier with a 4th order 15MHz lowpass filter approximating a Chebyshev frequency response. Most differential amplifiers require many precision external components to tailor gain and bandwidth. In contrast, with the LT6600-15, two external resistors program differential gain, and the filter’s 15MHz cutoff frequency and passband ripple are internally set. The LT6600-15 also provides the necessary level shifting to set its output common mode voltage to accommodate the reference voltage requirements of A/Ds. Using a proprietary internal architecture, the LT6600-15 integrates an antialiasing filter and a differential amplifier/driver without compromising distortion or low noise performance. At unity gain the measured in band signal-to-noise ratio is an impressive 76dB. At higher gains the input referred noise decreases so the part can process smaller input differential signals without significantly degrading the output signal-to-noise ratio. The LT6600-15 also features low voltage operation. The differential design provides outstanding performance for a 2VP-P signal level while the part operates with a single 3V supply. The LT6600-15 is packaged in an SO-8 and is pin compatible with standalone differential amplifiers.

Applications

• High Speed ADC Antialiasing and DAC Smoothing in Networking or Cellular Base Station Applications
• High Speed Test and Measurement Equipment
• Medical Imaging
• Drop-In Replacement for Differential Amplifiers

Key features

• Programmable Differential Gain via Two External Resistors
• Adjustable Output Common Mode Voltage
• Operates and Specified with 3V, 5V, ±5V Supplies
• 0.5dB Ripple 4th Order Lowpass Filter with 15MHz Cutoff
• 76dB S/N with 3V Supply and 2VP-P Output
• Low Distortion, 2VP-P, 800Ω Load, VS = 3V 1MHz: 86dBc 2nd, 90dBc 3rd 10MHz: 63dBc 2nd, 69dBc 3rd
• Fully Differential Inputs and Outputs
• Compatible with Popular Differential Amplifier Pinouts
• SO-8 Package