ADA4638-1

Data Sheet FEATURES Single supply operation: 4.5 V to 30 V Dual supply operation: ±2.25 V to ±15 V Low offset voltage: 4 μV maximum Input offset voltage drift: 0.05 μV/°C maximum High gain: 130 dB minimum High PSRR: 120 dB minimum High CMRR: 130 dB minimum Input common-mode range includes lower supply rail Rail-to-rail output Low supply current: 0.95 mA maximum 30 V Zero-Drift, Rail-to-Rail Output Precision Amplifier ADA4638-1 PIN CONFIGURATIONS ADA4638-1 NC 1 –IN 2 +IN 3 V– 4 TOP VIEW (Not to Scale) 8 7 6 5 NC V+ OUT NC 10072-001 NOTES 1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN. Figure 1. 8-Lead SOIC ADA4638-1 NC 1 –IN 2 +IN 3 V– 4 TOP VIEW (Not to Scale) 8 NC 7 V+ 6 OUT 5 NC APPLICATIONS Electronic weigh scale Pressure and position sensors Strain gage amplifiers Medical instrumentation Thermocouple amplifiers NOTES 1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN. 2. IT IS RECOMMENDED THAT THE EXPOSED PAD BE CONNECTED TO V–. Figure 2. 8-Lead LFCSP GENERAL DESCRIPTION The ADA4638-1 is a high voltage, high precision, zero-drift amplifier featuring rail-to-rail output swing. It is guaranteed to operate from 4.5 V to 30 V single supply or ±2.25 V to ±15 V dual supplies while consuming less than 0.95 mA of supply current at ±5 V. With an offset voltage of 4 μV, offset drift less than 0.05 μV/°C, no 1/f noise, and input voltage noise of only 1.2 μV p-p (0.1 Hz to 10 Hz), the ADA4638-1 is suited for high precision applications where large error sources cannot be tolerat...