Low Noise Fully Differential Amplifier GX7515 with 1000V/μs Slew Rate

The GXSC Low Noise Full Differential Amplifier GX7515 is a huge step forward in differential signal processing compared to general operational amplifiers.The GX7515 can be used as either a single-ended to differential amplifier or differential to differential amplifier, is as easy to use as an operational amplifier, and greatly simplifies the amplification and driving of differential signals.

The amplifier has low input noise, a -3dB bandwidth of 350MHz, and delivers differential signals with lower harmonic distortion than existing differential amplifiers.The GX7515 utilizes internal common mode feedback and external gain feedback to provide relatively good gain and phase matching.

The differential outputs of the GX7515 allow for a more balanced input to the differential ADC, maximizing ADC performance. the GX7515 eliminates the need for an auxiliary device to drive a high performance ADC and retains low frequency and DC information. The common mode level of the differential outputs can be adjusted by applying a voltage to the VOCM pin, making it easy to level shift to drive the inputs of a single-supply ADC. Fast overload recovery ensures sampling accuracy.

With good distortion performance, the GX7515 is an ideal driver for ADCs in communication systems, driving 10- to 16-bit converters at high 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. Available in SOIC package with an operating temperature range of -40°C to +125°C. Key features are listed below:

- Single-ended differential conversion with adjustable common mode voltage and externally adjustable gain

- Spurious Free Dynamic Range (SFDR):

-95dBc (1MHz input)

-85dBc (5MHz input)

-73dBc (20MHz input)

-3dB bandwidth: 350MHz (G=+1)

- 0.01% build-up time: 40ns; slew rate: 1000V/μs

- Low input voltage noise: 3.5nV/√Hz; output rail-to-rail

- Offset voltage: 0.5mV (typical)

- Wide supply voltage range: +3V to ±5V; low power consumption: 135mW (5V)

- 0.1dB gain flatness up to 40MHz

- Available in 8-pin SOIC package