RS8751XF 250MHz, Rail-to-Rail Output CMOS Operational Amplifier

RS8751XF vs. AD8054 / ADA4891 / OPA354: High-Speed, Low-Power Single Op Amp for Performance-Critical Analog Designs

The RS8751XF is a single-channel, high-speed CMOS operational amplifier designed for precision signal conditioning, video buffering, high-speed ADC driving, and broadband analog front-end applications. With its wide bandwidth, fast slew rate, and low distortion, RS8751XF is a competitive alternative to Analog Devices’ AD8054 and ADA4891-1 series, as well as Texas Instruments’ OPA354, delivering superior performance at lower power and cost.

1. Gain Bandwidth Product (GBP)

• RS8751XF: 320 MHz

• AD8054: 300 MHz

• ADA4891-1: 120 MHz

• OPA354: 100 MHz

✅ Advantage: RS8751XF offers higher bandwidth than all listed alternatives, enabling faster signal response and higher-frequency operation, making it ideal for high-speed analog and mixed-signal systems.

2. Slew Rate

• RS8751XF: 500 V/μs

• AD8054: 350 V/μs

• ADA4891-1: 55 V/μs

• OPA354: 22 V/μs

✅ Advantage: With a slew rate of 500 V/μs, RS8751XF excels in applications requiring rapid voltage transitions, such as high-speed DAC output buffering and video signal processing, outperforming even the AD8054 by 40%.

3. Supply Voltage Range

• RS8751XF: 2.5 V to 5.5 V

• AD8054: ±2.5 V (5 V total)

• ADA4891-1: 3 V to 12 V

• OPA354: 2.5 V to 5.5 V

✅ Advantage: RS8751XF operates over a wide single-supply range (2.5V–5.5V), making it ideal for low-voltage digital systems and portable devices, while maintaining high performance.

4. Quiescent Current

• RS8751XF: 5.5 mA

• AD8054: 6.5 mA (typical)

• ADA4891-1: 3.7 mA (typical)

• OPA354: 5.3 mA (typical)

⚖️ Comparison: RS8751XF offers lower power consumption than AD8054 while achieving higher speed, striking a better balance between performance and power in high-speed applications.

5. Input Offset Voltage

• RS8751XF: ±0.8 mV (typical)

• AD8054: ±1 mV (typical)

• ADA4891-1: ±0.25 mV (typical)

• OPA354: ±0.5 mV (typical)

⚖️ Comparison: RS8751XF offers competitive offset voltage for high-speed op amps, and is within a practical range for most high-speed analog front ends and buffering applications.

✅ Specification Summary Table

🔧 Ideal Applications for RS8751XF

• High-speed analog signal conditioning

• High-resolution DAC and ADC buffering

• Active filters in RF/IF chains

• Video signal processing and distribution

• Pulse and fast waveform amplification

• Precision analog front-ends for instrumentation

🎯 Why Choose RS8751XF?

The RS8751XF delivers industry-leading bandwidth (320 MHz) and ultra-fast slew rate (500 V/μs), while maintaining low power consumption and compact packaging, making it an ideal replacement for AD8054, ADA4891-1, and OPA354 in high-speed designs. Its rail-to-rail output, low distortion, and robust supply compatibility make it a flexible and cost-effective solution for engineers seeking reliable high-speed analog performance without compromising on power efficiency.

For designers looking to push performance boundaries while maintaining budget and board space constraints, RS8751XF is the optimal solution.