Texas Instruments Introduces Linearity Amplifier for Differential Signals

Texas Instruments Incorporated (TI) has introduced a dual-channel, high-speed current feedback amplifier. The device features 70 percent greater bandwidth gain at +2 V/V than competitive devices, providing signal conditioning with the linearity to minimize distortion for better signal fidelity and easier filtering. The amplifier offers supply voltage options and large gain capability, giving engineers the flexibility to adjust the parameters to address the specific need, such as high gain for differential signals or high output voltage or current for low power consumption. In addition, the device’s optimized symmetrical package eases layout for precision IF amplifiers, high-speed arbitrary waveform output drivers, wideband analog-to-digital converter (ADC) drivers and active filters.



The architecture also provides wider bandwidth capability at much higher gains than can be achieved with voltage feedback architecture. In contrast, fully differential amplifiers, which are for differential signal paths and are based on voltage feedback architecture, suffer from reduced bandwidths at larger gains. The OPA2695 combines the current-feedback architecture with an optimized differential pin-out, which provides superior gain and bandwidth, maintains high linearity with low harmonic distortion levels, and eases the design process. In addition, designers have the flexibility to provide a single supply voltage (3.5 V to 12 V) or a dual supply voltage (±1.75 V to ±6 V) to the OPA2695 to suit their requirements. For example, with a supply voltage of ±5 V and gain of +8 V/V, the OPA2695 can deliver a large output voltage swing of ±4.1 V or 8.2 Vpp with a 120 mA sourcing or sinking output drive current into an ADC for accurate digitization.