RS6331
High-speed op-amp with 50MHz GBW, 30V/μs slew rate, and 2.5mA supply current for fast signal processing applications.
Product Overview
Description
The RS6331 is a high-speed operational amplifier featuring 50MHz gain-bandwidth product and 30V/μs slew rate.
With rail-to-rail input and output, it maximizes dynamic range in single-supply applications.
The device is stable at unity gain and drives capacitive loads up to 100pF, making it ideal for active filters and video buffering.
Product Series
RS
Primary Application
Active filters
Key Features
- 50MHz GBW for high-speed applications
- 30V/μs slew rate
- Rail-to-rail input and output
- Unity gain stable
- High 60mA output drive
- Fast 100ns settling time
Specifications
| GBW | 50 MHz |
|---|---|
| Slew Rate | 30 V/μs |
| Offset Voltage | 500 μV (max) |
| Supply Current | 2.5 mA |
| Settling Time | 100 ns to 0.1% |
| Output Drive | ±60 mA |
| Supply Voltage | 2.7 - 5.5 V |
| Package | SOT23-5, SOIC-8 |
Applications
Active filters
Electronic system design
Video buffering
Electronic system design
ADC drivers
Motor drive and control systems
Photodiode amplifiers
Electronic system design
High-speed signal conditioning
Sensor signal conditioning
FAE Expert Insights
"The RS6331 is my recommendation for customers needing high-speed performance without breaking the budget. At 50MHz GBW, it handles most signal processing tasks in industrial and medical equipment. I've successfully used it in 16-bit ADC driver applications where settling time is critical - the 100ns to 0.1% is excellent for this class of op-amp. The 30V/μs slew rate ensures clean reproduction of fast edges. One thing to note - the 2.5mA supply current is higher than precision op-amps, so it's not suitable for ultra-low-power applications. But for performance-critical designs, this is a great value proposition."
Excellent speed-performance ratio for cost-sensitive high-speed designs
— Li Ming, BeiLuo
Frequently Asked Questions
What is the settling time of RS6331?
The RS6331 settling time is 100ns to 0.1% for a 2V step. This is excellent for a 50MHz op-amp and makes it suitable for driving high-resolution ADCs. Settling time depends on: (1) Step size - larger steps take longer; (2) Closed-loop gain - higher gain reduces effective bandwidth and increases settling; (3) Load capacitance - heavy capacitive loads slow settling; (4) Input source impedance - high impedance interacts with input capacitance. For ADC driving applications, ensure the op-amp settles to better than 0.5 LSB before ADC sampling starts.
Allow 2-3x settling time in your timing budget. Use SPICE simulation for precise timing analysis.
Can RS6331 drive large capacitive loads?
The RS6331 can drive capacitive loads up to 100pF at unity gain without external compensation. For larger loads: (1) Use isolation resistor (10-50Ω) in series with output; (2) Implement snubber network for very large loads; (3) Consider reducing loop gain for capacitive load driving. The high 60mA output drive capability helps with capacitive load charging. For video applications with long coaxial cables, the output drive capability ensures good signal integrity. Always check stability with your specific load using SPICE simulation or bench testing.
For loads >100pF, add series isolation resistor and verify stability with network analyzer.