AD8628WARZ-R7: High-Performance Zero-Drift Op-Amp | Analog Devices
AD8628WARZ-R7: High-Performance Zero-Drift Operational Amplifier by Analog Devices
The AD8628WARZ-R7 from Analog Devices Inc. represents the pinnacle of precision analog design, combining zero-drift technology with rail-to-rail performance in a compact SOIC package. This comprehensive guide explores why engineers worldwide trust this operational amplifier for critical applications.
In-Depth Technical Specifications
Zero-Drift Architecture
The AD8628WARZ-R7's auto-zero technology continuously corrects input offset voltage, achieving an industry-leading 1 V maximum offset and 0.005 V/ C drift. This makes it ideal for:
- Strain gauge signal conditioning
- Precision current sensing
- Medical instrumentation
- 16-bit+ ADC/DAC interfaces
Power Efficiency
Operating on just 850 A supply current (2.7V-5V range), the amplifier delivers exceptional power-to-performance ratio for battery-powered devices. Comparative analysis shows:
| Parameter | AD8628WARZ-R7 | Competitor A | Competitor B |
|---|---|---|---|
| Supply Current | 850 A | 1.2mA | 1.5mA |
| Offset Voltage | 1 V | 5 V | 10 V |
| Price (1k units) | $2.85 | $3.20 | $2.95 |
Application-Specific Design Considerations
Sensor Interface Circuits
When designing RTD temperature measurement systems:
- Use 0.1% tolerance resistors for reference voltage dividers
- Implement guard rings around high-impedance inputs
- Maintain symmetrical PCB layout to minimize thermal EMF
Industrial Environments
The extended -40 C to +125 C operating range requires:
- Conformal coating for humidity protection
- TVS diodes on all I/O lines
- Separate analog/digital ground planes
Purchasing Information
Available through authorized distributors including:
- Digi-Key: Stock #AD8628WARZ-R7CT-ND
- Mouser: Stock #584-AD8628WARZ-R7
- Analog Devices direct sales
For volume production, request industrial temperature testing reports and PPAP documentation through your sales representative.
Engineering Resources
Enhance your design with these official resources:
- Design Tools Suite (SPICE models, PCB footprints)
- Application Note AN-1324: Precision Sensor Signal Conditioning
- Webinar: Overcoming Noise Challenges in Low-Voltage Designs
For technical support, contact Analog Devices' 24/7 Engineer-to-Engineer support at support.analog.com.