OPA842 OPA843 Voltage Feedback Amplifier High Speed Low Noise 800MHz

Description

Product Overview

The OPA842 and OPA843 modules are precision voltage‑feedback operational amplifiers designed for demanding industrial and scientific applications. Manufactured by RELAND SUN, these amplifiers combine an impressive 800 MHz gain‑bandwidth product with a 110 dB open‑loop gain, delivering rapid response times and exceptional accuracy. Their low input voltage noise of 2 nV/√Hz and a modest offset voltage of 300 µV ensure that even the smallest signal variations are faithfully amplified without added distortion. With a typical output current capability of 100 mA, the devices can drive a variety of loads, making them suitable for audio, instrumentation, communication, and data‑acquisition systems. The dual‑channel configuration provides flexibility for differential signal processing, while the compact package eases board layout and reduces overall system size.

Usage

These amplifiers excel in environments where high speed and low noise are critical. In industrial control panels, they can be used to condition sensor signals, ensuring that rapid changes are captured accurately for real‑time monitoring. In laboratory equipment, the wide bandwidth supports high‑frequency measurements, while the low distortion guarantees reliable data. Audio engineers benefit from the clean amplification of low‑level signals, and communication system designers rely on the stable gain and fast settling time for high‑speed data transmission. The robust design also tolerates temperature variations common in field deployments, making the OPA842/OPA843 a versatile choice for both fixed installations and portable test equipment.

Why Choose Us

Choosing the OPA842 OPA843 series means selecting a product backed by rigorous quality assurance processes and a reputation for reliability. RELAND SUN adheres to international standards for semiconductor manufacturing, ensuring each unit meets exacting performance specifications. The amplifiers are tested for consistency across temperature ranges, guaranteeing stable operation from -40 °C to +85 °C. In addition, the company provides comprehensive technical support, offering design assistance, application notes, and prompt responses to inquiries. This commitment to customer success reduces development time and helps engineers bring products to market faster. With a proven track record in the industrial and scientific sectors, these amplifiers deliver the confidence needed for mission‑critical applications.

Key Features

• Ultra‑wide 800 MHz gain‑bandwidth for fast signal processing
• Low 2 nV/√Hz input noise ensures clean amplification of weak signals
• High 110 dB open‑loop gain provides excellent accuracy and stability
• Robust 100 mA output current capability drives diverse loads
• Dedicated technical support and detailed application resources

FAQ

What is the typical settling time for the OPA842/OPA843?

The amplifiers achieve a 12‑bit settling time of approximately 10.5 ns, which translates to rapid convergence on target values in high‑speed applications.

Can these amplifiers operate in harsh temperature environments?

Yes, they are rated for operation from –40 °C to +85 °C, making them suitable for outdoor equipment, industrial machinery, and other demanding settings.

What is the maximum output current and how does it affect load driving?

Each channel can source or sink up to 100 mA, allowing the amplifier to drive moderate‑impedance loads such as sensors, transducers, and small speakers without performance degradation.

Are there any special layout considerations for minimizing noise?

To preserve the low‑noise performance, keep input traces short, use proper grounding techniques, and place decoupling capacitors close to the power pins as recommended in the design guidelines.

How does the dual‑channel configuration benefit my design?

The dual‑channel architecture enables differential signal processing, common‑mode noise rejection, and the ability to implement complex filtering or instrumentation functions within a single footprint.