OPA846IDG4

Voltage - Input Offset:	150µV
Base Part Number:	OPA846
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply, Single/Dual (±):	5 V ~ 12 V, ±2.5 V ~ 6 V
Current - Output / Channel:	80mA
Current - Supply:	12.6mA
Series:	--
Current - Input Bias:	10µA
Gain Bandwidth Product:	1.75GHz
Slew Rate:	625 V/µs
Output Type:	--
Number of Circuits:	1
Amplifier Type:	Voltage Feedback
Part Status:	Active
Packaging:	Tube

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Introduction

OPA846IDG4 is a 4-channel operational amplifier manufactured and sold by Texas Instruments (TI). It was designed for industrial and instrumentation applications, and offer adjustable gain, low-noise, and high precision. It can be used in applications like programmable gain amplifiers, discrete transducer amplifiers, and active filters. The amplifier is a low power device which operates on voltages as low as 2.7V and 5V, and draws low quiescent current of 3.2 microamps.

Applications

This 4-channel amplifier is mainly used in industrial and instrumentation applications such as programmable gain amplifiers, discrete transducer amplifiers, and active filters. It can be used in the industrial field, such as in multiplexers, motor control, and stepper motor drivers, as well as consumer applications like touch screens and cell phones. The low noise and high precision of the amplifier make it an ideal choice for industrial and instrumentation applications.

Features

OPA846IDG4 features low noise, adjustable gain, wide power and temperature range, low quiescent current and a high common-mode input voltage range. The low-noise characteristic of the amplifier makes it ideal for applications in which low noise is essential, such as microphone amplifiers, test and measurement equipment, and industrial measurement systems. The common-mode input voltage range ensures that the amplifier can operate in a wide range of conditions and environment. The adjustable gain of the amplifier makes it useful for applications like gain control, level control, and filtering.

Working Principle

OPA846IDG4 is a four-channel operational amplifier. It employs a classic operational amplifier ‘’long-tailed-pair’’ topology, consisting of two differential input transistors, one in the non-inverting input stage and the other in the inverting input stage. The inverting amplifier ‘’long-tailed-pair’’ topology employs two equally-matched transistors in the non-inverting and inverting stages. Each of the two stages works independently and amplifies the difference between its respective transistors’ collector voltages. The gain at the output of the amplifier is determined by the feedback voltage which is supplied by a voltage divider. This voltage divider consists of two resistors with one connected to the amplifier’s output, and the other connected to ground. The gain of the amplifier is then determined by the ratio of these two resistors. The amplifier also has a current limitation circuit, which prevents the output of the amplifier from exceeding the limits of the power supply.The amplifier’s low noise, adjustable gain, wide power and temperature range, low quiescent current and high common-mode input voltage range make it an ideal choice for industrial and instrumentation applications.

Conclusion

OPA846IDG4 is a 4-channel operational amplifier designed for industrial and instrumentation applications. It features low noise, adjustable gain, wide power and temperature range, low quiescent current and a high common-mode input voltage range. Its ‘’long-tailed-pair’’ topology employs two equally-matched transistors in the non-inverting and inverting stages, providing excellent noise performance and low distortion. The adjustable gain of the amplifier makes it useful for applications such as gain control, level control, and filtering. The amplifier is ideal for applications in which low noise and high precision are essential, and can be used in industrial and consumer applications alike.

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