16 V Auto-Zero, Rail-to-Rail Output Operational Amplifier
The AD8638 is a wide bandwidth, auto-zero Amplifier featuring Rail-to-Rail output swing and low noise. This Amplifier has very low offset, drift, and bias current. Operation is fully specified from 5 V to 16 V single supply (2.5 V to 8 V dual supply).
The AD8638 provides benefits previously found only in expensive zero-drift or chopper-stabilized Amplifiers Using the Analog Devices, Inc., topology, these auto-zero Amplifiers combine low cost with high accuracy and low noise. No external capacitors are required. In addition, the AD8638 greatly reduces the digital switching noise found in most chopper-stabilized Amplifiers
With a typical offset voltage of only 3 V, drift of less than 0.04 V/C, and noise of only 1.2 V p-p (0.1 Hz to 10 Hz), the AD8638 is suited for applications in which error sources cannot be tolerated. Position and Pressure Sensors medical equipment, and strain gage Amplifiers benefit greatly from nearly zero drift over their operating temperature ranges. Many systems CAN take advantage of the Rail-to-Rail output swing provided by the AD8638 to maximize SNR.
The AD8638 is specified for the extended industrial tempera-ture range (40C to +125C). The AD8638 is available in tiny 5-lead SOT-23 and 8-lead SOIC packages.
The AD8638 is a member of a growing series of auto-zero op amps offered by Analog Devices (see Table 1 in the data sheet).
Applications Pressure and position Sensors Strain gage Amplifiers Medical instrumentation Thermocouple Amplifiers Automotive Sensors Precision references Precision current sensing
Data Sheet, Rev. A, 11/07
By Analog Devices, Inc.
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