ISL55005IEZ-T7

The ISL55005IEZ-T7 is a differential, 4.5GHz, low noise amplifier. It utilizes a double-balanced Gilbert cell topology to achieve wideband performance in a compact form factor. With power supply, off-chip inductors, and resistors, the amplifier provides an excellent gain and noise figure performance from DC to 4.5GHz.

Applications

The ISL55005IEZ-T7 is designed to meet the RF amplifier needs of a wide range of applications. In the communications and military/aerospace sectors, it is ideal for a variety of receiver front-end tasks such as gain control, preamplifiers, IF amplifiers, and transmitters. In portable and consumer electronics, it is adapted for use in mobile phones, cameras, PDAs, and so on. In the automotive industry, it is adopted for use in automotive radar systems among others.

Working Principle

The ISL55005IEZ-T7 operates on a differential topology, consisting of a pair of Gilbert cells, each one providing a gain of 34dB. Each cell has its own use of a single BJT and NMOS transistors sourcing and sinking current, and thus forming a differential amplifier that provides differential current gain. The transistors are connected in a large loop via the collectors, and the differential outputs from the loop are used to drive the load impedance and provide current gain.

The device offers a high slew rate (32kHz) which aids in its noise figure performance. Additionally, the device can operate over a wide supply voltage range from 1.7V to 6V and over a wide temperature range from -40°C to +85°C. Also, there is on-chip CMFB bias which guarantees linearity and helps maintain gain over the varying temperature range.

In summary, the ISL55005IEZ-T7 is a low noise, high linearity, wide bandwidth differential amplifier suitable for use in a variety of applications. It has a low power consumption that allows it to be used in battery-powered devices and provides excellent performance within its temperature range.