LMV797MMX

Voltage - Input Offset:	100µV
Base Part Number:	LMV797
Supplier Device Package:	8-VSSOP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply, Single/Dual (±):	1.8 V ~ 5.5 V
Current - Output / Channel:	60mA
Current - Supply:	1.3mA
Series:	--
Current - Input Bias:	0.1pA
Gain Bandwidth Product:	17MHz
Slew Rate:	11.5 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	2
Amplifier Type:	General Purpose
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The LMV797MMX is a low-noise differential linear amplifier and a part of Texas Instruments’ amplifiers portfolio. It is designed to facilitate high-precision signal amplification applications. It supports a wide range of gains and bandwidths, with very low noise and power dissipation. With two differential inputs which can accept signals from either single-ended or differential sources, the LMV797MMX is particularly suitable for sensing and measurement applications.

Application Field

The versatile and low-noise characteristic of the LMV797MMX makes it suitable for numerous applications. Typical applications are:

• Instrumentation amplifiers.
• Current sensor amplifiers.
• Low-power audio amplifiers.
• Sensor signal conditioning.
• Remote sensor wireless interfaces.

Working Principle

The LMV797MMX provides a differential output from two differential inputs, making it suitable for both single-ended and differential source signals. The voltage gain of the LMV797MMX can be adjusted over a wide range of gains, from 7.5 to 400. The device produces low noise and power dissipation, typical of 10.6 µVrms and 2.6 mW, respectively. The wide-bandwidth differential linear amplifier is designed to replicate small-signal behavior accurately, even in the very large signals, with an inherent gain of 140 dB and a unity-gain frequency of 1.3 GHz. It is well suited to high-precision signals. The LMV797MMX linear amplifiers work on a classic operating amplifier (op-amp) feedback loop principles. It is configured to bring the voltage differential on the two inputs to zero volts, which is referred to as taking the inputs to a common mode. The differential signals are then amplified by the amplifier. The gain of the op-amp is a function of the ratio of the resistors in the feedback loops and this is set using a resistor network.

Conclusion

The LMV797MMX is a very versatile and low-noise differential linear amplifier. It is a part of the Texas Instruments’ amplifiers portfolio, and it is designed to facilitate high-precision signal amplification applications. It supports a wide range of gains and bandwidths, with very low noise and power dissipation. The LMV797MMX linear amplifiers work on classical operating amplifier (op-amp) feedback loop principles and the gain of the amplifier can be adjusted over a wide range by changing the values of the feedback loop resistors. With two differential inputs and wide-bandwidth of up to 1.3GHz, the LMV797MMX is suited to a range of applications, particularly those involving instrumentation, current sensor amplifiers, low-power audio amplifiers, sensor signal conditioning, and remote sensor wireless interfaces.

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