Dual-channel precision low-noise CMOS operational amplifier in MSOP-8 package, featuring 2.7nV/√Hz noise and rail-to-rail I/O.
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CBM8656AMS8
MSOP-8
The CBM8656AMS8 is a dual-channel, low-noise, high-precision CMOS operational amplifier in MSOP-8 package, manufactured by Corebai Microelectronics. It features 2.7nV/√Hz voltage noise density at 10kHz, rail-to-rail input and output, 28MHz gain-bandwidth product, and 50µV typical offset voltage. Operating from a single 2.7V to 5.5V supply over −40°C to +125°C, it is qualified for automotive applications.
The CBM8656AMS8 utilizes DigiTrim technology to achieve high DC accuracy by trimming offset voltage after packaging, correcting assembly-induced mechanical stress offsets. Its true rail-to-rail input stage allows the common-mode voltage range to extend to both supply rails, enabling buffering of wide dynamic range signals in single-supply systems. The output stage swings rail-to-rail with ±220mA output current capability. Internal protective circuitry provides input overvoltage protection and anti-phase reversal. The amplifier is unity gain stable with 69° phase margin and 28MHz bandwidth, suitable for precision signal conditioning.
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | OUT A | Output of Channel A |
| 2 | −IN A | Inverting Input of Channel A |
| 3 | +IN A | Non-Inverting Input of Channel A |
| 4 | V− | Negative Supply Voltage |
| 5 | +IN B | Non-Inverting Input of Channel B |
| 6 | −IN B | Inverting Input of Channel B |
| 7 | OUT B | Output of Channel B |
| 8 | V+ | Positive Supply Voltage |
| Application | Description |
|---|---|
| ADC/DAC Buffers | Buffers high-resolution ADCs and DACs in single-supply systems with rail-to-rail input/output swing |
| Audio Equipment | Microphone pre-amplifiers and mixing consoles leveraging low noise (2.7nV/√Hz) and low THD+N (0.0007%) |
| Industrial Controls | Precision process control and instrumentation requiring high CMRR (100dB) and low offset drift |
| Precision Filters | Active filter designs requiring high speed (28MHz GBW) and low noise performance |
| Digital Scales | Weighing systems requiring low offset voltage (50µV) and high DC precision |
| Automotive Collision Avoidance | Signal conditioning in automotive safety systems qualified for −40°C to +125°C operation |
| PLL Filters | Phase-locked loop filter applications requiring precision and rail-to-rail capability |
| Sonar Detectors | Underwater signal amplification benefiting from low noise and high output current (±220mA) |
| Model | Manufacturer | Package | Key Difference |
|---|---|---|---|
| CBM8656AS8 | Corebai | SOIC-8 | Same die, SOIC-8 package |
| CBM8655AMS8 | Corebai | MSOP-8 | Single-channel version, same MSOP-8 package |
| CBM8655AS8 | Corebai | SOIC-8 | Single-channel version, SOIC-8 package |
| AD8656ARMZ | Analog Devices | MSOP-8 | Pin-compatible industry reference |
| AD8656ARZ | Analog Devices | SOIC-8 | Pin-compatible, SOIC-8 package |
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.
All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.
Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.
All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.
Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.
