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10 MHz and 12 MHz dual difference amps

ADI offers better bandwidth and slew rates to precision circuit designers

28th September 2007 – Analog Devices designed the AD8270 and AD8273 dual-channel high-speed, low distortion difference amplifiers for applications that require extremely fast and precise measurement. The 10 MHz AD8270 and 12 MHz AD8273 are as much as three times faster than comparable parts: the AD8270 has 30 V/µsec slew rate, and the AD8273, 25 V/µsec. AC performance is complemented by dc precision, high SNR (signal-to-noise ratio) and an 86 dB CMRR (common mode rejection ratio) that is 12 dB higher than that of similar chips. These figures suit the amps to applications such as semiconductor test equipment, programmable logic controllers, power monitors and other high-speed, multi-channel systems. Both the amplifiers feature internal gain-setting resistors that allow the design engineer to set gain with no external components. The AD8270 comes in a 4 mm x 4 mm, 16-lead LFCSP (lead-frame chip-scale package) and is priced at $1.99 (1000); the AD8273 is in a 14-lead SOIC leaded package tha allows a pin- and function-compatible upgraded to existing designs, and is priced at $1.65 (1,000).