Instrumentation amps achieve max offset voltage of 20 µV at 25C

Instrumentation amps achieve max offset voltage of 20 µV at 25C

Parts eliminate drift over time and temperature

The MAX4208/MAX4209H instrumentation amplifiers use a spread-spectrum autozeroing technique that constantly measures and corrects the input offset voltage, thereby eliminating drift over time and temperature. Both parts achieve an offset voltage of 20 μV max at 25C, 30 μV max at 85C, and 40 μV max at 125C. The indirect current-feedback architecture offers true ground sensing and an input common-mode voltage range of -0.1 V to VDD of −1.3 V.

The amplifiers are designed for high-gain amplification of small differential signals (±100 mV) with CMOS, 1-pA input bias currents. The MAX4209H (G = 100x) offers a gain accuracy of 0.25% max at 25C, 0.3% max at 85C, and 0.35% max at 125C, while the MAX4208 features an adjustable gain, with the gain set by the ratio of two external resistors (G = 1 + R2 /R1 ). Housed in a 8-pin microMAX package, the parts also feature a CMRR of 106 dB min and a gain bandwidth of 750 kHz. ($1.65 ea/1,000available now.)

Maxim Integrated Products , Sunnyvale , CA
Customer Service 888-629-4642

http://www.maxim-ic.com