Supply instrumentation amplifier features rail-to-rail output and shutdown

The Texas Instruments INA826S device, as well as presenting a low-cost, offers an extremely low power consumption along with shutdown that operates over a very wide single or dual-supply range. A single external resistor sets any gain from one to 1000. The device offers excellent stability over temperature, even at G>1, as a result of the low gain drift of only 35ppm/C (max). The device is optimized to provide excellent common-mode rejection ratio of over 100dB (G=10) over frequencies up to 5kHz. At G=1, the common-mode rejection ratio exceeds 84dB across the full input common-mode range from the negative supply all the way up to 1V of the positive supply. Using a rail-to-rail output, the device is well-suited for low voltage operation from a 3V single supply as well as dual supplies up to ±18V. To reduce supply current below 2µA shutdown pins are provided. Additional circuitry protects the inputs against overvoltage of up to ±40V beyond the power supplies by limiting the input currents to less than 8mA. This device is available in a 10-pin, 3mm × 3mm VSON surface-mount package and operates over the –40C to +125C temperature range.