MAX44294ASD+T

Current - Input Bias:	6nA
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply, Single/Dual (±):	4.5 V ~ 36 V, ±2.25 V ~ 18 V
Current - Output / Channel:	60mA
Current - Supply:	1.2mA
Voltage - Input Offset:	30µV
Series:	--
Gain Bandwidth Product:	10MHz
Slew Rate:	5 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	4
Amplifier Type:	General Purpose
Part Status:	Not For New Designs
Packaging:	Tape & Reel (TR)

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Introduction

The MAX44294ASD+T is a linear amplifier from Maxim Integrated. It belongs to the “Instrumentation, OP Amps, Buffer Amps” category and is designed to amplify audio signals over a wide dynamic range of input levels. It features an adjustable low pass filter with a cutoff frequency ranging from 100 Hz to 1 kHz, a –3 dB bandwidth of 60 MHz, or an effective bandwidth of 30 MHz. This makes it suitable for many applications where high quality audio signal amplification is desired.

Applications

The MAX44294ASD+T is ideal for amplifying audio signals, from microphone level to line level. It can also be used in radio broadcasting and studio applications where accurate and powerful sound reproduction is needed. Highly dynamic sources, such as drums and electric guitar amplifiers, can be accurately reproduced with the MAX44294ASD+T. It can be used in professional music mixing consoles to provide clean and professional sounding results. It is also suitable for use in event audio systems, home theater systems, and general audio applications requiring wide dynamic range and low distortion.

Working Principle

The MAX44294ASD+T is a single-stage, linear amplifier with a wide dynamic range of input levels. It consists of two identical, CMOS op-amp stages connected in a non-inverting configuration. The first stage is the gain section and consists of two current-feedback op-amps connected in a differential configuration. This gives the user control over the gain of the amplifier, allowing it to be set to any desired value between 0 dB and 27 dB. The second stage is the low-pass filter section and consists of two capacitor-coupled operational amplifiers connected in a differential configuration. This allows the amplitude of frequencies above a certain cutoff frequency to be filtered out. The cutoff frequency is adjustable between 100 Hz and 1 kHz and is determined by the values of the output capacitors used in the filter.

Conclusion

The MAX44294ASD+T is a linear amplifier designed to amplify audio signals over a wide dynamic range of input levels. It features an adjustable low pass filter and can be used in audio systems requiring wide dynamic range and low distortion. Its two amplifying sections consist of two current-feedback op-amps in a differential configuration, and two capacitor-coupled op-amps in a differential configuration.

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