LMH6514
Description
The LMH6514 is a high performance, digitally controlled variable gain amplifier (DVGA). It bines precision gain control with a low noise, ultra-linear, differential amplifier. Typically, the LMH6514 drives a high performance ADC in a broad range of mixed signal and digital munication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dy.. namic range. When used in conjunction with a high speed ADC, system dynamic range can be extended by up to 42 d B. The LMH6514 has a differential input and output allowing large signal swings on a single 5V supply. It is designed to accept signals from RF elements and maintain a terminated impedance environment. The input impedance is 200Ω resistive. The output impedance is either 200Ω or 400Ω and is user selectable. A unique internal architecture allows use with both single ended and differential input signals. Input signals to the LMH6514 are scaled by a highly...
