NATIONAL Semiconductor, represented by Arrow , has announced three new variable gain amplifiers (VGA) designed as higher-performance substitutes for the company's Comlinear (CLC) line of amplifiers.
These products are suitable for use in applications such as professional and consumer video equipment, high-speed digital subscriber line (DSL) modems and cellular base stations, displays, as well as instrumentation, test and medical systems.
Utilising the VIP10 process technology, National has developed a high-speed, power-efficient, good performance amplifier.
The new LMH6502/6503/6504 wideband, voltage-controlled variable gain amplifiers allow high-frequency large signals (slew rate >1500V/µs) and can also drive heavy load currents (75mA).
Additionally, the amplifiers provide accurate device-to-device gain matching (less than ±0.7dB) and an attenuation range of >70dB, making them suitable for automatic gain control applications in the communication, industrial and video markets.
Pin-for-pin replacements for the CLC520/522/5523, the LMH6502/6503 consumes approximately 300mW with a speed of 130MHz, and the LMH6504 consumes 100mW with a speed of 150MHz.
The LMH6502/6503 accepts a differential input and the LMH6504 is single-ended. While the gain control is linear in dB for a large portion of the total gain range for the LMH6502 and LMH6504, the LMH6503 is linear in V/V.
National's new amplifiers are based upon the VIP10 process. The VIP10 is a high speed, dielectrically isolated, complementary bipolar IC process that utilises deep trench technology on a bonded wafer for complete dielectric isolation and optimal high-speed amplifier performance.