In signal processing, operational amplifiers serve as core components whose performance directly determines equipment's signal accuracy and operational stability. Corebai Microelectronics' CBM8051/CBM8052/CBM8054/CBM8051N/CBM8052N series of high-speed operational amplifiers have established a product portfolio covering single-channel, dual-channel, and four-channel applications through their core features: "high-speed low-distortion characteristics, industrial-grade adaptability, and multi-form integration solutions." Supported by key parameters including 2.5V～5.5V single power supply, 150MHz (G=+1) bandwidth, rail-to-rail output, and-40℃ to +125℃ operating temperature, this series delivers signal amplification solutions that balance performance, power consumption, and integration density.

1、Industry pain points are highlighted: Under the upgrade of electronic devices, the two core contradictions of traditional operational amplifiers

Under the trend of "high frequency, miniaturization and low power consumption" of electronic devices, traditional operational amplifiers gradually expose the problem of being difficult to meet the needs of new scenarios, forming a prominent contradiction between "demand upgrading" and "solution lagging behind":

The contradiction between high speed performance and signal distortion: the bandwidth is up to standard but the signal precision is insufficient

In scenarios such as video processing and high-speed ADC/DAC drivers, operational amplifiers (OAs) must not only deliver high bandwidth but also exhibit low-distortion signal amplification capabilities. While traditional OAs can achieve a-3dB bandwidth of around 150MHz, their flatness at 0.1dB generally falls below 30MHz. This results in gain fluctuations exceeding 0.5dB for high-frequency signals (such as camera video signals and high-speed sensor signals) within 50MHz, causing signal distortion that fails to meet the demands of high-precision applications.

The contradiction between environmental reliability and integration: wide temperature and miniaturization are difficult to be taken into account

Industrial outdoor equipment (e.g., base stations, outdoor sensors) must operate within a-40℃ to +125℃ temperature range, while consumer electronics and wearable devices require micro-packaged solutions (occupying less than 3mm² of board space). In traditional designs, industrial-grade operational amplifiers typically use large packages like SOP-14, consuming over 10mm² of board area. Micro-packaged versions only support the 0℃ to 70℃ commercial temperature range, failing to maintain stability in harsh environments. This necessitates designers to balance "reliability" with "miniaturization" during system design.

2、CBM8051 series four core advantages: with measured parameters to solve the pain points of the industry

CBM8051 series addresses the pain points of the industry, and forms four core advantages through key parameter optimization and functional design. All performance indicators are from measured data to ensure the feasibility of implementation:

1. Wide voltage and low power consumption: suitable for all scenarios of power supply, control energy consumption

Wide voltage coverage: supports single power supply 2.5V～5.5V, compatible with dual power supply ±1.25V~±2.75V, no additional power conversion circuit, can directly adapt to lithium battery, USB 5V, industrial 5V and other mainstream power supply scenarios, compatibility range far beyond the traditional operational amplifier.

Hierarchical Power Control: Under normal operating conditions, each amplifier maintains a static current of just 2.8mA – significantly lower than conventional high-speed operational amplifiers. The power-dropping-capable CBM8051N/CBM8052N models feature a power supply current that can be reduced to 50-137μA during power loss, with a fast power-off startup time of 236ns and a shutdown time of 52ns. This enables rapid switching between power modes during device standby, achieving optimal performance-to-power efficiency balance.

2. High speed and low distortion: ensure high frequency signal integrity

High bandwidth and high flatness: under the gain of G=+1, the bandwidth of-3dB reaches 150MHz, and the gain bandwidth product reaches 250MHz; under the gain of G=+2, the flatness bandwidth of 0.1dB reaches 52MHz, ensuring that the signal gain fluctuation within 52MHz is less than or equal to 0.1dB, so as to avoid distortion of high-frequency signals.

Rapid dynamic response: The overshoot rate (G=+1,2V output step) reaches 180V/μs, the rise/fall time (G=+2,0.2Vp-p) is only 4.5ns, and the 0.1% precision setup time (G=+2,2V output step) is 50ns. It can quickly track input signal changes and adapt to high-speed ADC/DAC drive scenarios with high response speed requirements.

3. High precision input + industrial grade reliability: ensure signal accuracy and environmental adaptability

Low input error: the typical value of input offset current is 1pA, the typical value of input offset current is 2pA, the maximum value of input offset voltage (25℃) is 8mV, the typical value of input offset voltage drift is 2μV/℃, the shunt loss of photoelectric diode and other high impedance signal sources is very small, ensuring the accuracy of signal acquisition.

Industrial-grade environmental adaptability: Operating temperature range-40℃ to +125℃, maximum junction temperature 160℃, storage temperature range-65℃ to +150℃. Electrostatic discharge (ESD) performance meets 6kV for human models and 400V for machine models, ensuring stable operation in harsh environments like industrial outdoor installations and automotive cabins. This addresses the narrow temperature tolerance issues of traditional miniature packaged operational amplifiers.

4. Multiple packages + multiple channels: flexible integration to accommodate different size requirements

Diverse packaging solutions: —— Micro packages (SC70-5, SOT23-5) minimize board footprint for wearable devices and compact sensors; Medium packages (MSOP-8, SOP-8) balance integration density with thermal performance for consumer electronics; Multi-channel packages (TSSOP-14, SOP-14) are specifically engineered for the four-channel CBM8054 model to reduce board space occupied by multi-channel circuits.

Multiple channels are optional: three channel configurations are provided, including single channel (CBM8051/8051N), dual channel (CBM8052/8052N) and four channel (CBM8054). Multi-channel functions can be achieved without combining multiple single-channel operational amplifiers, which reduces the complexity of PCB wiring and the number of components, and reduces the circuit failure rate.

1、Scenario-based implementation solutions for CBM8051 series

CBM8051 series has formed precise adaptation in the three fields of consumer electronics, industrial control and communication by virtue of its core parameters and differentiated design. Users can quickly locate suitable models according to scenarios:

1. Consumer electronics: adapted to small size and low power requirements

Portable devices: Designed for blood glucose meters, portable pulse oximeters, and miniaturized environmental monitoring systems, these devices feature long battery life (supporting hundreds of tests per charge), compact design, and μV-level signal amplification. The CBM8051N/CBM8052N chip ensures low power consumption during power outages (50μA to 137μA), while the SC70-5/SOT23-5 micro-packaging (less than 3mm² board footprint) and 1pA input bias current guarantee signal accuracy.

Multimedia equipment: Includes DVD/CD players (process 20kHz~44.1kHz audio and 4.43MHz video carrier signals with gain fluctuation ≤0.1dB) and professional cameras/cameras (dual/multi-channel signal processing with limited body space). The CBM8051 series ensures 52MHz signal distortion-free operation at G=+2 with 0.1dB flatness, while CBM8052 (dual-channel, MSOP-8 packaging) and CBM8054 (quadruple-channel, TSSOP-14 packaging) reduce component count for compact layout adaptation.

2. Industrial and sensing: to meet the needs of high precision and high reliability

Photoelectric diode preamplifier: Designed for industrial component positioning detection, outdoor light intensity monitoring, and security photoelectric sensing devices. It amplifies weak current signals at the nanohm level (nA) by utilizing a 1pA low input bias current to minimize signal loss. With an industrial-grade temperature range of-40℃°C to +125℃°C and 6kV electrostatic discharge (ESD) protection for human models, this device is engineered to withstand harsh environments.

Industrial Filters: Designed for motor speed control systems, power grid voltage monitoring equipment, and industrial sensor signal preprocessing. These filters eliminate 50Hz harmonics and peak interference above 100kHz, with some models requiring 4-channel signal synchronization processing. Utilizing a 250MHz gain bandwidth product (GWP) to meet high-frequency filtering requirements, the CBM8054 (four-channel, SOP-14/TSSOP-14 package) simplifies multi-channel circuitry while 2.5V~5.5V single power supply compatibility with industrial power systems.

3. Communication: adaptation to high integration and high speed requirements

Multi-channel Base Station Signal Processing: Compatible with 4G/5G base station MIMO modules, capable of processing high-frequency communication signals (100MHz-150MHz), with outdoor temperature tolerance (-40°C to +55°C) and compact control module design. Utilizes G=+1 architecture with 150MHz bandwidth and-3dB noise floor for high-speed signal processing. CBM8054 chip (four-channel, TSSOP-14 package) reduces PCB footprint while delivering industrial-grade wide temperature tolerance and ESD protection for harsh environments.

High-speed driver: ADC/DAC driver module for routers and switches (ADC/DAC conversion rate exceeding 100 MSPS), designed to rapidly track signals (avoiding conversion delays), ensure signal distortion-free operation, and accommodate dense PCB layouts. Featuring 180V/μs voltage swing rate and 250MHz gain bandwidth product (GWP) to meet high-speed requirements, it adopts SOT23-5/MSOP-8 compact packaging for layout compatibility and 2.5V~5.5V single power supply compatibility.