LT6604-15

• Product Introduction

LT6604-15 dual-channel, very low noise, differential amplifier, and 15MHz low-pass filter

Features Dual-channel differential amplifier with a 15MHz low-pass filter      Fourth-order filter      Similar to Chebyshev response      Ensure phase and gain matching      Differential gain can be set using resistors 76dB signal-to-noise ratio (3V power supply, 2VP-P output) Low distortion, 2VP-P output, 800Ω load, VS = 3V    1MHz: 86dBc (second order), 90dBc (third order)    10MHz: 63dBc (2nd order), 69dBc (3rd order) Technical specifications are formulated for 3V, 5V, and ±5V operating power supplies Fully differential input and output Adjustable output common-mode voltage Compact form factor: 4mm x 7mm x 0.75mm QFN package Description ®The LT 6604-15 includes two matched full-differential amplifiers, each equipped with a fourth-order 15MHz low-pass filter. A fixed-frequency low-pass filter approximates a Chebyshev response. By integrating a filter and a differential amplifier, the device achieves extremely low distortion and noise. Under ununit gain conditions, the measured in-band signal-to-noise ratio reached an impressive 76dB. Under higher gain conditions, input reference noise decreases, allowing the device to handle smaller input differential signals without significant degradation in signal-to-noise ratio. Gain and phase height matching between the two channels. The gain of each channel is set independently by two external resistors. By providing an adjustable output common-mode voltage, the LT6604-15 achieves level shifting, making it highly suitable for direct connection to ADCs. The technical specifications of the LT6604-15 have been comprehensively formulated for a 3V operating voltage. When using a single 3V power supply, this differential design delivers excellent performance at signal levels up to 2VP-P. For a complete list of single-channel and dual-channel differential amplifiers with integrated 2.5MHz to 20MHz low-pass filters, please refer to the bottom page of this datasheet. Application Dual-channel differential ADC driver and filter Single-ended to differential converter Matching, dual-channel, differential filters Common-mode transformation of differential signals High-speed ADC anti-aliasing and DAC filtering processing in wireless infrastructure or network applications High-speed testing and measurement equipment Medical imaging