FEATURES
n LT6604-15 Dual Very Low Noise, Differential Amplifier and 15MHz Lowpass Filter DESCRIPTION
n n n n n n Dual Differential Amplifier with 15MHz Lowpass Filters 4th Order Filters Approximates Chebyshev Response Guaranteed Phase and Gain Matching Resistor-Programmable Differential Gain 76dB Signal-to-Noise (3V Supply, 2VP-P Output) Low Distortion, 2VP-P, 800Ω Load, VS = 3V 1MHz: 86dBc 2nd, 90dBc 3rd 10MHz: 63dBc 2nd, 69dBc 3rd Specified for Operation with 3V, 5V and ±5V Supplies Fully Differential Inputs and Outputs Adjustable Output Common Mode Voltage Small 4mm × 7mm × 0.75mm QFN Package The LT®6604-15 consists of two matched, fully differential amplifiers, each with a 4th order, 15MHz lowpass filter. The fixed frequency lowpass filter approximates a Chebyshev response. By integrating a filter and a differential amplifier, distortion and noise are made exceptionally low. At unity gain, the measured in band signal-to-noise ratio is an impressive 76dB. At higher gains, the input referred noise decreases, allowing the part to process smaller input differential signals without significantly degrading the signal-to-noise ratio.
Linear Technology
