LT1991HDD#TRPBF

Current - Input Bias:	2.5nA
Base Part Number:	LT1991
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
Voltage - Supply, Single/Dual (±):	2.7 V ~ 36 V, ±1.35 V ~ 18 V
Current - Output / Channel:	21mA
Current - Supply:	130µA
Voltage - Input Offset:	25µV
Series:	--
-3db Bandwidth:	110kHz
Gain Bandwidth Product:	560kHz
Slew Rate:	0.12 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	1
Amplifier Type:	Programmable Gain
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LT1991HDD#TRPBF is a high-density operational amplifier IC that is used in many instrumentation and linear applications. It has a wide range of features and options available, making it one of the most popular operational amplifiers. This article will discuss the LT1991HDD#TRPBF application field, its working principle and how it can be used in various applications.

Application Field and Working Principle

The LT1991HDD#TRPBF can be used in many linear and instrumentation applications, ranging from precision op amps to buffer amplifiers. Its applications include:

• Precision Op Amps - The LT1991HDD#TRPBF has a wide range of features and options that make it suitable for use in precision op amps. It has a low voltage noise of 0.7 nV/√Hz, a wide power supply range, and high-performance ESD protection. It is also able to drive up to 50mA peak output currents. This makes it ideal for applications such as high-resolution digital-to-analog converters (DACs), analog-to-digital conversion (ADC) systems, active filters, and loudspeaker protection.
• Buffer Amps - The LT1991HDD#TRPBF is also suitable for use in buffer amplifiers. It has a high slew rate of 7V/µs and a wide bandwidth of 30MHz. It also has a fast startup and stable performance when driving large capacitive loads. This makes it suitable for buffering signals in video amplifiers, automotive audio amplifiers, and power amplifiers.
• Instrumentation Amps - The LT1991HDD#TRPBF can also be used in instrumentation applications. It has a wide common-mode range of ±15V, which allows it to be used in applications with high-voltage signals. It also has a low distortion of 0.005%, which is suitable for low-level signal amplification and precision measurement.

The LT1991HDD#TRPBF has an internal architecture that consists of two stages. The first stage consists of a differential amplifier, which amplifies the input signal and provides isolation from the second stage. The second stage is an additional differential amplifier, which is used to further amplify the input signal. The output stage is then used to buffer the output of the differential amplifier and provide the final output signal.

Conclusion

The LT1991HDD#TRPBF is a high-density operational amplifier that can be used in linear and instrumentation applications. It has a wide range of features and options, including a low noise and distortion, wide power supply range and fast startup. It is suitable for use in precision op amps, buffer amplifiers and instrumentation amplifiers, making it one of the most popular operational amplifiers available.

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