Wideband, Low-Power, Ultra-High Dynamic Range Differential Amplifier

The ISL55210 is a very wide band, fully differential amplifier (FDA) intended for high dynamic range ADC input interface applications. This voltage feedback FDA design includes an independent output common mode voltage control. At the lowest quiescent power (115mW), the ISL55210 offers a 4.0GHz gain bandwidth product with a very low input noise of 0.85nV/√(Hz). In a balanced differential I/O configuration, with 2VP-P output into a 200Ω load configured for a gain of 15dB, the IM3 terms are <-100dBc through 110MHz. With a minimum operating gain of 2V/V (6dB), the ISL55210 supports a wide range of higher gains with minimal BW or SFDR degradation. Its ultra-high differential slew rate of 5,600V/µs ensures clean large signal SFDR performance or a fast settling step response. The ISL55210 requires only a single 3.3V (max 4.2V) power supply with a 35mA typical quiescent current. This industry-leading low-current solution can be further reduced when needed using the optional power shutdown to <0.4mA supply current. External feedback and gain setting resistors give maximum flexibility and accuracy. A companion device, the ISL55211, includes on-chip feedback and three possible gain setting connections where an internally fixed gain solution is preferred. The ISL55210 is available in a leadless, 16 Ld TQFN package and is specified for operation over the -40 °C to +85 °C ambient temperature range.