MAX4091ASA+

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The MAX4091ASA+ is an operational amplifier (op amp) that is specifically designed for low-noise and high-accuracy applications. It is suitable as an instrumentation amplifier, a buffer/gain amplifier, or a transimpedance amplifier (TIA). It has low input bias current, low equivalent input noise voltage, a wide common-mode range and low distortion.

The MAX4091ASA+\'s low noise, low distortion, and wide common-mode range make it ideal for a wide range of precision applications, including audio, telecommunications, automotive, and medical. It can be used in industrial and instrumentation systems, video pre-amplifiers, strain gauge amplifiers, and instrumentation amplifiers.

Application Fields

The MAX4091ASA+ is designed for a wide range of precision applications, including low-noise audio, telecommunications, automotive, and medical applications. Its wide common-mode range, low input bias current, low equivalent input noise voltage, and low distortion make it suitable for industrial and instrumentation systems, video pre-amplifiers, strain gauge amplifiers, and instrumentation amplifiers.

Features

• Low Noise: 0.9µVrms/√Hz
• Wide common-mode range
• High accuracy: 0.02%DC accuracy
• Low input bias current: 100pA at 25°C.
• Low quiescent current: 3.2mA/amplifier

Working Principle

The MAX4091ASA+ is an operational amplifier (op amp) that is specifically designed for low-noise and high-accuracy applications. An op amp amplifies the difference between two input voltages, the non-inverting and inverting inputs. The gain of the op amp is determined by the external resistors connected to its positive input (non-inverting input) and negative inputs (inverting input).

The MAX4091ASA+ also has an additional output stage, which provides an output current that can be adjusted using the external resistors connected to the output. This additional output stage provides a low output impedance, which is useful for driving capacitive loads or power MOSFETs. The MAX4091ASA+ can drive a wide range of loads, from low-impedance loads like low-capacitance LEDs to high-impedance loads like digital logic inputs.

The MAX4091ASA+ also features an internal low-noise, low-distortion amplifier with a wide common-mode range. The MAX4091ASA+ has a wide symmetric bandwidth of 1 MHz, and its input bias current is low and stable. It also features low equivalent input noise voltage, and its distortion is below 0.02%.

The MAX4091ASA+ is available in both a through-hole (MAX4091ASA+) and a surface-mount (MAX4091AS+14M) package. The MAX4091ASA+ is rated at -40°C to +85°C. It has an AEC-Q100 Grade 1 qualification and is lead (Pb) and halogen-free.

Conclusion

The MAX4091ASA+ is an operational amplifier designed for low-noise and high-accuracy applications. It is suitable as an instrumentation amplifier, a buffer/gain amplifier, or a transimpedance amplifier (TIA). It has low input bias current, low equivalent input noise voltage, a wide common-mode range, and low distortion, making it suitable for a wide range of precision applications. The MAX4091ASA+ is available in through-hole and surface-mount packages and is rated at -40°C to +85°C.

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