High-Speed Operational Amplifier Integrated Circuit
High-speed operational amplifier ICs are the “high-performance versions” of general-purpose op-amps. They are specifically designed to handle analog signals with extremely high frequencies or rapid changes.
Think of it this way: if general-purpose op-amps are like reliable family sedans, then high-speed op-amps are the race cars. They are engineered to respond with extreme precision in an extremely short amount of time.
IC-Mart Your Trusted Source for High-Speed Operational Amplifier IC Chips
(from leading manufacturers)
Global High-Speed Op-Amp IC Manufacturers and Their Main Product Lines
1. Texas Instruments (TI)
TI offers the most comprehensive range of high-speed op-amp models. Its products are mainly divided into three major series: OPA, THS, and LMH.
| Series (Prefix) | Typical Models | Classification / Key Features |
| OPA Series​ | OPA838, OPA855 | High-bandwidth voltage-feedback (VFB) type. Commonly used for transimpedance amplification (TIA). |
| THS Series​ | THS3491, THS3091 | Current-feedback (CFB) type. High slew rate and high output current. |
| THS Series​ | THS4551, THS4541 | Fully Differential Amplifier (FDA). Specifically designed to drive high-speed ADCs. |
| LMH Series​ | LMH6629, LMH6702 | Ultra-low noise and ultra-wideband. Originally from National Semiconductor. |
2. Analog Devices (ADI)
After acquiring Linear Technology and Maxim, ADI now has an exceptionally strong product portfolio.
| Series (Prefix) | Typical Models | Category / Key Features |
| AD/ADA Series​ | AD8001, AD8099 | Classic low-power high-speed series / Ultra-low-noise series. |
| AD/ADA Series​ | ADA4870, ADA4807 | High-current output (1A) / Ultra-low-power, rail-to-rail high-speed op-amp. |
| LTC Series​ | LTC6409, LTC6363 | Former Linear Technology products. Known for high-frequency drive and precision differential performance. |
| MAX Series​ | MAX44242, MAX44250 | Former Maxim products. Focus on combining low drift with high speed. |
3. Renesas / Intersil
Renesas’ high-speed op-amps (primarily from Intersil) are popular in video signal processing and specific industrial applications.
| Series (Prefix) | Typical Models | Classification / Key Features |
| EL Series​ | EL5166, EL5167 | Ultra-high bandwidth (1.4 GHz) current-feedback type. Common in video surveillance. |
| ISL Series​ | ISL55190, ISL28190 | Industrial-grade high-speed op-amps. Emphasize stability and a wide operating voltage range. |
4. STMicroelectronics (ST)
ST’s products typically offer excellent value. They are suitable for high-volume consumer electronics or general industrial applications.
| Series (Prefix) | Typical Models | Category / Key Features |
| TSH Series​ | TSH344, TSH122 | Dedicated to video buffering and driving. Support HD signal processing. |
| TS Series​ | TSV991, TSV911 | Wide-bandwidth general-purpose op-amps (bandwidth ~20 MHz to 100 MHz). |
5. Microchip
Microchip’s high-speed op-amps are designed for embedded systems. They work with Microchip microcontrollers for signal conditioning.
| Series (Prefix) | Typical Models | Classification / Key Features |
| MCP Series​ | MCP651, MCP6291 | High-speed op-amps optimized for low-power, single-supply applications. |
Leading China High-Speed Op-Amp Manufacturers and Alternative Models
1. SGMICRO
SGMICRO is a leading domestic analog chip maker. It has one of the most extensive product lines and a high market share. Its high-speed op-amps offer good stability.
| SGMICRO Model | Equivalent / Alternative International Models | Key Features |
| SGM8051/2/4 | AD8051, OPA836 | 250 MHz bandwidth, voltage-feedback type, low power consumption. |
| SGM8061/2/3 | AD8061, AD8062 | 300 MHz bandwidth, rail-to-rail output, high-speed, low-noise. |
| SGM8049 | OPA354 | High slew rate. Suitable for high-speed pulse processing. |
| SGM8301/2 | AD8001 | Current-feedback type, extremely high slew rate. Suitable for video applications. |
2. 3PEAK
3PEAK excels in signal chain accuracy and noise immunity. Its products are common in industrial automation and base station equipment.
| 3PEAK Model | Equivalent / Alternative International Models | Key Features |
| TPA1811/2 | AD8011, AD8051 | 250-350 MHz bandwidth. Low-power high-speed series. |
| TPA1881/2 | AD847, OPA627 | High-voltage, high-precision high-speed operational amplifiers. |
| TPF11x/13x | Series of Video Filter Drivers | Specifically designed to replace driver ICs in video signal chains. |
3. RUNIC
RUNIC offers excellent value. It serves consumer electronics, medical devices, and general industrial sectors with rapid model updates.
| RUNIC Models | Equivalent / Replacement for International Models | Key Features |
| RS8451/2/4 | OPA835, OPA836 | 350 MHz bandwidth, 160 V/μs slew rate. Highly competitive. |
| RS8411/2 | AD8051, AD8052 | General-purpose high-speed op-amps. 180 MHz bandwidth. |
| RS8417 | OPA357 | High-speed op-amp with an enable pin. Suitable for power-saving designs. |
4. Corebai
Corebai is a specialist in high-bandwidth applications. Some of its models offer bandwidths exceeding 1 GHz.
| Corebai Models | Equivalent / Alternative International Models | Key Features |
| CBM8051/2 | AD8051/2 | For typical high-speed applications. High maturity. |
| CBM8001 | AD8001 | High-bandwidth (~800 MHz) current-feedback type. |
| CBM4551 | THS4551 | Fully differential amplifier. Specifically designed to drive high-speed ADCs. |
I. What Is a High-Speed Operational Amplifier?
Industry standards typically define a “high-speed” op-amp by these characteristics:
Wide Bandwidth:​ The gain-bandwidth product (GBW) is typically 50 MHz or higher, and can reach several GHz. This means it can handle high-frequency signals without significant gain loss.
High Slew Rate:​ Typically >100 V/μs. This measures how fast the output voltage can change. A high slew rate keeps edges sharp when processing pulses or square waves.
Fast Settling Time:​ The time to stabilize within a specified error range (e.g., 0.1%) is extremely short, usually in nanoseconds (ns).
Low Distortion:​ The signal remains clean at high frequencies without generating unwanted harmonics.
II. Classification
1. Voltage-Feedback (VFB) – The Balanced General-Purpose Type
This is the most common type. It offers good DC accuracy (low offset voltage) and a stable gain-bandwidth product.
Design Logic:​ Balances accuracy and speed. Suitable for most general high-frequency signal processing.
Typical Models:​ OPA838 (TI), ADA4807 (ADI), MAX44242 (ADI/Maxim).
2. Current-Feedback (CFB) – The Pure Speed Type
Designed for applications needing extremely high slew rate and large-signal bandwidth.
Design Logic:​ Bandwidth is less affected by gain, and slew rate is very high. DC accuracy is slightly worse than VFB. Common in video and pulse amplification.
Typical Models:​ THS3091 (TI), AD8001 (ADI), EL5166 (Renesas).
3. Fully Differential Amplifier (FDA) – The ADC Driver
Both inputs and outputs are differential. Primarily used to drive high-performance, high-speed ADCs.
Design Logic:​ Suppresses common-mode noise and provides balanced output for high-speed data acquisition systems.
Typical Models:​ THS4551 (TI), ADA4940 (ADI), LTC6363 (ADI/Linear).
4. Low-Noise & Low-Distortion Type – For Signal Integrity
Extremely optimized for noise and harmonic distortion (THD) while keeping high-frequency performance.
Design Logic:​ Used where signal purity is critical, like communications, radar, and medical imaging (e.g., ultrasound).
Typical Models:​ LMH6629 (TI), AD8099 (ADI), OPA855 (TI).
5. High-Current Output Driver Type – The Load Driver
Can directly drive low-impedance loads like 50Ω coaxial cable or transformers.
Design Logic:​ Combines high bandwidth with strong current output capability (typically >100 mA).
Typical Models:​ LT1210 (ADI/Linear), THS3491 (TI), ADA4870 (ADI).
6. Low-Power High-Speed Type – For Portable Devices
Offers relatively high bandwidth with very low quiescent current.
Design Logic:​ Optimizes the speed-to-power ratio. Suitable for battery-powered devices.
Typical Models:​ OPA836 (TI), MAX44250 (ADI/Maxim), TSH344 (ST).
III. Typical Application Scenarios
High-speed op-amps are used where signal “speed” or “accuracy” is critical.
1. Data Acquisition Systems (Driving ADCs)
This is the most classic application.
Scenario:​ An op-amp buffers, amplifies, or filters a signal before an ADC samples it.
Function:​ Ensures the signal is stable at the exact moment of sampling to prevent errors.
Typical Use:​ Test equipment (oscilloscopes), industrial automation.
2. Video Signal Processing
Scenario:​ Surveillance cameras, HD video distributors, broadcast equipment.
Function:​ Video signals (RGB, composite) have high bandwidth. High-speed op-amps (especially CFB) drive 75Ω cables to prevent motion blur and distortion.
3. Communication Base Stations & RF Links
Applications:​ 5G base stations, radar receivers, fiber optic receivers.
Function:​ Processes intermediate frequency (IF) signals or acts as a transimpedance amplifier (TIA) for photodiode signals.
4. Medical Imaging Equipment
Applications:​ Ultrasound (B-scan), CT, MRI.
Function:​ Provides low-noise pre-amplification for weak, high-frequency reflected signals to ensure clear images.
5. Automotive Electronics (Autonomous Driving)
Applications:​ LiDAR, automotive radar, backup cameras.
Function:​ Rapidly processes radar/LiDAR echo signals to help the system make millisecond decisions.
6. Optoelectronic Conversion (Transimpedance Amplifier – TIA)
Applications:​Barcode scanners, laser rangefinders, optical communication.
Function:​ Converts nanosecond-level pulse currents from lasers or photodiodes into recognizable voltage signals. Requires low input bias current and high speed.