BA4558RFV-E2

Voltage - Input Offset:	500µV
Base Part Number:	BA4558
Supplier Device Package:	8-SSOPB
Package / Case:	8-LSSOP (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 105°C
Voltage - Supply, Single/Dual (±):	8 V ~ 30 V, ±4 V ~ 15 V
Current - Output / Channel:	10mA
Current - Supply:	3mA
Series:	--
Current - Input Bias:	60nA
Gain Bandwidth Product:	2MHz
Slew Rate:	1 V/µs
Output Type:	--
Number of Circuits:	2
Amplifier Type:	General Purpose
Part Status:	Active
Packaging:	Tape & Reel (TR)

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BA4558RFV-E2: Applications, Working Principles and Limitations

Introduction

The BA4558RFV-E2 is an integrated circuit (IC) available from ROHM Semiconductor. It provides unprecedented performance, offering a high precision signal amplification solution. Its low-noise, low-power and high-sensitivity characteristics make it suited for both linear and instrumentation applications. As such, it is categorized as a Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps.

Applications of the BA4558RFV-E2

The BA4558RFV-E2 is a wide band amplifier IC applicable in a variety of linear and instrumentation applications. It is intended for use in industrial and consumer applications. Among its main applications are in professional audio equipment as well as professional, consumer and automotive infotainment systems. Other applications include musical instruments, general consumer electronics, audio amplifiers, cable TV terminals and navigation systems.

Working Principle of the BA4558RFV-E2

The working principle of the BA4558RFV-E2 is quite simple. The IC consists of two high-precision voltage follower circuits that buffer outputs from the non-inverting (A) and inverting (B) inputs of the opamp in order to reduce output noise and distortion. The low-noise, low-power and high-sensitivity characteristics make it a viable solution for both linear and instrumentation applications. To ensure that the opamp responds correctly, a stabilizing bias voltage network is employed. This network is also responsible for providing a stable noise level at the output.

Limitations of the BA4558RFV-E2

As with any amplifier, the BA4558RFV-E2 has its limitations. As an example, its application is limited to three basic areas: electrical and mechanical characteristics, thermal characteristics, and output noise levels. The IC offers a high gain of 48 dB and low output noise of 0.2 µV. On the other hand, its temperature drift is moderate at -3.1 dB/°C. Moreover, its noise reduction circuitry amplifies small output noise even further (this is due to the multiplier\'s large gain). For this reason, a low input noise of 0.2 µV should be maintained when using the BA4558RFV-E2.

Conclusion

The BA4558RFV-E2 is a versatile amplifier IC designed for use in a variety of linear and instrumentation applications. It provides high precision signal amplification, low-noise, low-power and high-sensitivity characteristics. However, the user should be aware of its limitations such when selecting the input noise. As such, the user should ensure that low input noise is maintained in order to ensure effective operation.

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