New Product Recommendation: Zhongwei Aixin Launches a Low-Noise Operational Amplifier Series

Introduction

Wuxi Zhongwei Aixin specializes in the R&D of high-performance analog chips, developing a comprehensive portfolio of low-noise operational amplifiers that cover general‑purpose, high‑precision, rail‑to‑rail, wide‑supply‑voltage, and surge‑resistant applications. Its products meet critical requirements such as ultra‑weak signal amplification, low distortion, low noise, and high stability, and are widely compatible with consumer electronics, industrial instrumentation, and audio equipment. HiFi In fields such as precision sensing, it is the preferred domestic alternative—offering performance comparable to international brands, stable supply, and superior cost efficiency.

 

Product Features

(1) AiP4580 Series: Classic Audio-Grade Low-Noise Dual Op-Amps

Audio‑grade low noise and high fidelity: typical noise as low as 6.5 nV/√Hz @ 1 kHz , Total Harmonic Distortion ≤0.0005% , perfectly restores the details of the audio signal

Wide voltage and high immunity: supported ±2~±18V ( 4~36V ) Wide supply voltage, CMRR/PSRR Highest 110dB , industry /  Handles all consumer‑grade use cases.

Surge‑proof exclusive protection: The upgraded circuitry can directly withstand 220V AC surge immunity, tailored for demanding signal-processing applications.

Fully compatible with classic models: Pin-to-Pin Directly compatible NJM4580

Main model: AiP4580、AiP4580S、AiP4580P (Anti-surge upgraded version)

(2) AiP4558 Series: Classic, General-Purpose, Low-Noise Dual Op Amps—Cost-Optimized

Unmatched value: Performance matches that of industry‑standard, widely used models, with a clear cost advantage for bulk purchases, making it an excellent choice for cost‑sensitive applications.

Wide voltage and high compatibility: supports ±1.5~±18V ( 3~36V ) Wide supply voltage, with a quiescent current of only 2mA/CH , Low-power design optimized for battery-powered applications

Surge Protection Upgrade: Dedicated circuitry can directly withstand 220V AC surge and impact resistance, suitable for harsh industrial-grade environments.

Fully compatible with classic models: Pin-to-Pin Directly compatible NJM4558

Main model: AiP4558、AiP4558S、AiP4558P (Anti-surge upgraded version), AiP4558L (Low-Voltage Optimized Version)

(3) AiP24580 Series: Four-Channel Low-Noise Operational Amplifier, Highly Integrated Dedicated Type

Four-channel highly integrated design: single-chip integration 4 Low-noise, rail-to-rail operational amplifier with high integration.

No performance degradation: typical noise per channel 6.5 nV/√Hz @ 1 kHz , bandwidth 12MHz , multi-channel with no crosstalk

Industrial-grade high reliability: CMRR/PSRR 100dB , strong anti-interference capability, perfectly suited for industrial multi-channel data acquisition applications

Main model: AiP24580

(4) AiP553x Series: High-Performance, Low-Noise Audio Op Amps – A Classic, Cost-Effective Alternative

Ultra-low noise across the entire series: typical noise as low as 5 nV/√Hz at 1 kHz , vocals / Instrument details are rendered to the fullest. HiFi Level of auditory perception

High bandwidth and high dynamic response: maximum gain–bandwidth product 24MHz , slew rate 6 V/μs , No distortion even with high‑level signals; suitable for professional audio preamps and headphone amplification applications.

Fully compatible with classic models: Pin-to-Pin Directly compatible NE5532/NE5534

Main model: AiP5532 (stereo), AiP5534 (Mono High-Performance Edition)

(5) AiP871x Series: Low-Voltage, Low-Power, Rail-to-Rail, Low-Noise Operational Amplifiers—Dedicated for Portable Applications

Ultra-low voltage and low-power adaptation: supported ±1.1~±2.75 (2.2~5.5V) Single / Dual-supply operation, with a quiescent current of only 0.7mA , the turn-off current is as low as microampere Level, significantly extending battery life

Rail-to-rail input and output: With a single supply, the signal swing is fully utilized, eliminating the need for a negative‑rail power supply and greatly simplifying circuit design in portable devices.

Ultra-compact package for flexible adaptation: Coverage SOT23-5/SOP8/MSOP8 Ultra‑small package, perfectly suited for the compact form factors of portable devices. PCB Design

Main model: AiP8711 (single-channel), AiP8712 (dual-channel), AiP8714 (Four-channel), AiP8713/19 (With enable/disable version)

(6) AiP872x Series: Mid‑Bandwidth, Low‑Voltage Rail‑to‑Rail, Low‑Noise Op Amps—Balancing Performance and Power Efficiency

A golden balance of performance and power consumption: the static current per channel is only 1.3mA , bandwidth increased to 10MHz , with higher bandwidth than competing products at the same power consumption. 60% , balancing battery life and signal processing speed

Flexible adaptation across all scenarios: ±1.1~±2.75 (2.2~5.5V) Single / Dual-supply operation, rail-to-rail input and output, compatible with the vast majority of low-voltage analog applications.

High anti-interference and high stability: CMRR/PSRR 100dB , suitable for both consumer-grade and industrial-grade low-voltage applications

Main model: AiP8721 (single-channel), AiP8722 (dual-channel), AiP8724 (Four-channel), AiP8723/29 (With enable/disable version)

(7) AiP873x Series: High-Speed, Low-Noise, Rail-to-Rail Op Amps for Precision Sensing Applications

High-speed, low-noise dual‑optimized performance: typical noise as low as 7.3 nV/√Hz @ 1 kHz , with bandwidth up to 20MHz It is one of the domestically produced op-amps with the lowest noise and the highest bandwidth at the same voltage level.

Precision signal without distortion: rail-to-rail input and output, high slew rate, and no distortion of small high-frequency signals, perfectly suited for amplifying the high-frequency outputs of precision sensors.

Main model: AiP8731 (single-channel), AiP8732 (dual-channel), AiP8734 (Four-channel), AiP8733/39 (With enable/disable version)

(8) AiP877x Series: Low-Offset Rail-to-Rail Low-Noise Op Amps – Precision General-Purpose

Low Offset and High Precision: Typical Input Offset Voltage Only 300 μV , with lower offset than a typical operational amplifier 50% , high-precision signal amplification with zero drift, eliminating the need for an additional zeroing circuit

Universal for both single- and dual-supply operation: Supported ±2.2~±8V Dual power supply, 2.2~16V Operates from a single supply, with rail-to-rail input and output, compatible with the vast majority of general-purpose analog circuit designs.

High integration, low cost: covering dual / Four channels, package coverage DIP8/SOP8/TSSOP8， Pin-to-Pin Compatible with mainstream international models, offering a significant cost advantage.

Main model: AiP8772 (dual-channel), AiP8774 (Four-channel)

 

Product Advantages

1. Ultra-low noise, with no distortion even for faint signals.

The entire series can achieve noise levels as low as 5 nV/√Hz The audio floor is clean and transparent, small signals are reproduced with remarkable clarity, and high‑impedance source signals are processed with even greater purity.

 

2. Full‑scene coverage of bandwidth and slew rate

Bandwidth coverage 2.2MHz–24MHz , covering everything from low-speed general-purpose to high-speed acquisition; slew rate coverage extends to 1.7V/μs–12V/μs , the large-signal transient response is clean and crisp.

3. Wide voltage compatibility, single /  Flexible dual-power compatibility

Low-Voltage Rail-to-Rail Series Support 2.2~5.5V Single-supply operation is an excellent choice for portable devices; wide‑voltage audio. /  Industrial series support ±2V~±18V , compatible with industrial and automotive environments; the entire series supports a single power supply. /  Dual power supplies; the design requires no architectural changes.

4. High-precision DC characteristics ensure more stable system operation.

The input offset voltage can be as low as 0.25 mV , low temperature drift and stable zero point; CMRR/PSRR Up to 110dB , which can effectively suppress common-mode interference and power supply ripple; AiP87XX The series input bias current reaches pA Class, capable of directly driving high-impedance sensors.

5. Fully packaged, making mass production and deployment even more hassle-free.

Coverage SOT23-5/6 、SOP8、MSOP8、DIP8、SOP14、DIP14、 TSSOP14 All mainstream packages, surface-mount / Fully featured with a compact footprint for portable devices, and offering superior thermal performance in larger packages, it meets diverse structural requirements.

6. Full-temperature stability, industrial-grade high reliability

Operating temperature range -40℃~85℃ (Some models support) -40℃~125℃ ), with built-in over-temperature protection, ESD Protection, with long-term stable and reliable operation.

 

Application areas

Audio / Audio system /HiFi Equipment

Precision sensing / Instruments and meters / Data Collection

Portable / Wearing / Battery-powered smart devices

Industrial Control / Universal signal amplification / Harsh-environment industrial control

 

Conclusion

The Zhongwei Aixin family of low-noise operational amplifiers redefines the value of domestically produced op amps with their low noise, high precision, broad compatibility, and exceptional reliability. Whether for audio equipment that demands uncompromising sound quality, industrial instruments requiring precise signal acquisition, or portable devices operating in harsh environments, they deliver a high‑performance, cost‑effective, and easily scalable one‑stop signal‑chain solution.

 

(Source: Zhongwei Aixin official website)