OPA1641AIDR

Voltage - Input Offset:	1mV
Base Part Number:	OPA1641
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 (±):	4.5 V ~ 36 V, ±2.25 V ~ 18 V
Current - Output / Channel:	36mA
Current - Supply:	1.8mA
Series:	SoundPlus™
Current - Input Bias:	2pA
Gain Bandwidth Product:	11MHz
Slew Rate:	20 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	1
Amplifier Type:	Audio
Part Status:	Active
Packaging:	Tape & Reel (TR)

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OPA1641AIDR Application Field and Working PrincipleThe OPA1641AIDR is a low noise op-amp with a fast response time, making it ideal for high frequency signal amplification and advanced data acquisition applications. It is especially used in instrumentation and measurement systems, providing excellent signal fidelity and repeatability which is necessary for sensitive equipment.The OPA1641AIDR is a well-known instrumentation amplifier that provides exceptional performance in a wide range of applications. It features a low-noise, low-distortion design with high-stability to ensure accurate data acquisition and signal integrity. The OPA1641AIDR offers very good power supply rejection ratio (PSRR), low input bias current, wide bandwidth and a fast response time for improved signal fidelity. Its exceptional CMRR (Common-Mode Rejection Ratio) makes it well suited for sensitive signal measurement requirements.Working PrincipleThe OPA1641AIDR is a dual input, single output (DIO) operational amplifier. It is designed with a three-stage architecture, consisting of differential input, gain stage and output level control sections. The differential input stage uses two differential pairs of MOSFET transistors to amplify the signal applied to the Vin+ (positive) and Vin- (negative) pins. The gain stage increases the gain of the input signal, and the voltage level control stage provides for the correct output voltage through open-loop gain control.The OPA1641AIDR also uses a current-source based feedback loop to provide more stability and to allow the operating voltage to remain constant throughout the operating range. This feedback loop will also prevent the amplifier\'s gain from changing with temperature or power supply variations.The OPA1641AIDR is also optimized for use in high-performance applications. It has a wide bandwidth of 300 MHz and a low-noise figure (NF) of 0.7 dB. This allows it to be well suited for wideband amplifiers and high frequency signal amplification. It is also capable of driving low-impedance loads, such as cables, high-speed digital devices, and other active components.ConclusionThe OPA1641AIDR is an ideal solution for advanced data acquisition systems, instrumentation and measurement systems and wideband amplifiers due to its excellent performance characteristics. It offers exceptional signal fidelity and stability, low noise, fast response times and wide bandwidth. Its current-source based feedback loop also helps to ensure positive accuracy and prevent gain changes with temperature or power supply variations. This makes it ideal for a variety of applications.

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