GX7516 Fully Differential Amplifier for IF and Baseband Gain Modules Replaces AD8138

In baseband gain modules, baseband signals often contain a wealth of information, placing high demands on the amplifier‘s noise performance and gain control accuracy.The GX7516‘s low noise characteristics and precise gain control capability effectively enhance the strength of baseband signals while minimizing the introduction of noise, ensuring accurate transmission and processing of information.

With excellent gain accuracy and stability, the GX7516 can effectively amplify signals in the IF range while maintaining low distortion and high linearity. This allows it to excel in applications such as communication systems, radar equipment, and radio receivers. In IF processing, signals are relatively high in frequency, and the GX7516 is able to accurately capture and amplify these signals to provide high-quality inputs for subsequent processing steps.

The GX7516 is a huge step forward in differential signal processing from a typical operational amplifier. the GX7516 can be used as either a single-ended to differential amplifier or a differential to differential amplifier, is as easy to use as a typical operational amplifier, and greatly simplifies differential signal amplification and drive. The amplifier has low input noise, a -3dB bandwidth of 300MHz, and provides differential signals with lower harmonic distortion than existing differential amplifiers.The GX7516 utilizes internal common mode feedback and external gain feedback to provide relatively good gain and phase matching.

With good distortion performance, the GX7516 is an ideal driver for ADCs in communication systems, driving 10-bit to 16-bit converters at higher frequencies. The high bandwidth and IP3 characteristics make it suitable for use as a gain module in IF and baseband signal chains. Excellent detuning and dynamic performance make the device well suited for a variety of signal processing and data acquisition applications.

Key features:

- Adjustable common mode voltage, externally adjustable gain

- Spurious-free dynamic range (SFDR): 91dBc (5MHz input); 81dBc (20MHz input)

-3dB Bandwidth: 300MHz (G=+1)

- 0.01% build-up time: 20ns

- Voltage swing rate: 1000V/μs

- Fast overdrive recovery: 8ns

- Low input voltage noise: 3.5nV/√Hz

- Offset voltage: 0.5mV (typical)

- Wide supply voltage range: +3V to ±5V Low power consumption: 130mW (5V)

- 0.1dB gain flatness up to 40MHz

- Available in 8-pin SOIC and MSOP packages