Introduction to Zero-Drift Amplifiers
Zero-drift amplifiers are designed to maintain a very low offset voltage and drift over time and temperature, making them ideal for high-gain applications. Unlike traditional amplifiers, zero-drift amplifiers self-correct, ensuring precision in various conditions.

Applications

• Temperature sensors
• Thermopiles/thermocouples
• Pressure sensors
• Precision current sensing
• Strain gage amplifiers
• Medical instrumentation
• Precision references
• Automotive sensors
• Electronic weigh scales
• Photodiode amplifiers

Key Features of Zero-Drift Amplifiers

• Eliminate offset voltage changes over time and temperature
• Reduce low-frequency noise (1/f noise)
• Self-correcting capabilities
• Low offset voltage (VOS = 5μV max at 25°C)
• Low temperature coefficient of offset voltage (TCVOS = 0.005μV/°C up to 125°C)

Performance Comparison
A graph comparing voltage noise density across different frequencies shows that Analog Devices' zero-drift amplifiers outperform competitors in terms of noise reduction.

Product Specifications
Various zero-drift amplifiers are available with different specifications, including supply voltage, rail-to-rail capabilities, maximum offset voltage, typical temperature coefficient, gain bandwidth, slew rate, noise levels, and chopping frequency. Some notable models include:

• AD8628/29/30: Low voltage, high precision
• AD8551/52/54: Low noise, suitable for precision applications
• AD8571/72/74: Balanced performance for various applications
• ADA4051-1/2: Micropower, suitable for low-power applications
• AD8230/31: High voltage, zero-drift instrumentation amplifiers

Contact Information
Analog Devices, Inc. provides contact details for their headquarters in the USA, Europe, Japan, and Southeast Asia for further inquiries and support.

Conclusion
Zero-drift amplifiers from Analog Devices offer superior performance in precision applications by minimizing offset voltage drift and noise, making them suitable for a wide range of industrial and consumer applications.