AD8675ARMZ

The AD8675 precision operational amplifier has ultralow offset, drift, and voltage noise combined with very low input bias currents over the full operating temperature range. The AD8675 is a precision, wide bandwidth op amp featuring rail-to-rail output swings and very low noise. Operation is fully specified from ±5V to ±15V. With typical offset voltage of only 10μV, offset drift of 0.2μV/°C, and noise of only 0.10μV p-p (0.1Hz to 10Hz), the AD8675 is perfectly suited for applications where large error sources cannot be tolerated. For applications with even lower offset tolerances, the proprietary nulling capability allows a combination of both device and system offset errors up to 3.5mV (referred to the input) to be compensated externally. Unlike previous circuits, the AD8675 accommodates this adjustment without adversely affecting the offset drift, CMRR, and PSRR of the amplifier. Precision instrumentation, PLL, and other precision filter circuits, position and pressure sensors, medical instrumentation, and strain gage amplifiers benefit greatly from the very low noise, low input bias current, and wide bandwidth. Many systems can take advantage of the low noise, dc precision, and rail-to-rail output swing provided by the AD8675 to maximize SNR and dynamic range. The smaller packages and low power consumption afforded by the AD8675 allow maximum channel density or minimum board size for space-critical equipment. The AD8675 is specified for the extended industrial temperature range (-40°C to +125°C). The AD8675 amplifier is available in the tiny 8-lead MSOP, and the popular 8-lead, narrow SOIC, RoHS compliant packages. MSOP packaged devices are only available in tape and reel format.

Applications

• Precision instrumentation
• PLL filters
• Laser diode control loops
• Strain gage amplifiers
• Medical instrumentation
• Thermocouple amplifiers

Key features

• Very low voltage noise: 2.8 nV/Hz
• Rail-to-rail output swing
• Low input bias current: 2 nA maximum
• Very low offset voltage: 75 μV maximum
• Low input offset drift: 0.6 μV/°C maximum
• Very high gain: 120 dB
• Wide bandwidth: 10 MHz typical
• ±5V to ±18V operation