LTC2057IDD#PBF

Current - Input Bias:	30pA
Base Part Number:	LTC2057
Supplier Device Package:	8-DFN (3x3)
Package / Case:	8-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply, Single/Dual (±):	4.75 V ~ 36 V, ±2.38 V ~ 18 V
Current - Supply:	900µA
Voltage - Input Offset:	0.5µV
Series:	--
Gain Bandwidth Product:	1.5MHz
Slew Rate:	0.45 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	1
Amplifier Type:	Zero-Drift
Part Status:	Active
Packaging:	Tube

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LTC2057IDD#PBF Application Field and Working Principle

The LTC2057IDD#PBF is a precision, low-noise, low-power instrumentation amplifier. It contains independent input buffer amplifiers, an internal highly accurate reference, and an adjustable gain amplifier, all in a very small form factor. With its low-noise characteristics and high precision, the LTC2057IDD#PBF is ideal for a variety of analog applications, from instrumentation and medical to automotive and industrial.

Classification: Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Description:

The LTC2057IDD#PBF is a low-power, low-noise, precision instrumentation amplifier. It is a monolithic integrated circuit (IC) chip composed of three separate audio amplifiers and related circuitry. It consists of an adjustable preamplifier, a feedback amplifier, and a differential input stage. The preamplifier is used to adjust the overall gain of the circuit, while the feedback amplifier is used to reduce noise and increase the gain of the signal. The differential input stage is used to subtract the noise from the signal.The LTC2057IDD#PBF also features a temperature-compensated reference, analogous to a zener diode. The integrated circuit features low-noise and high-precision characteristics, making it ideal for applications such as medical instrumentation, automotive and industrial measurement, and even audio equipment. The LTC2057IDD#PBF operates using a single +5V power supply and consumes only 1mW of power. This makes the instrumentation amplifier ideal for battery powered and portable applications. In addition, the LTC2057IDD#PBF features low input offset voltage, as well as low drift, making it suitable for high-precision applications.

Working Principle:

The signal input of the LTC2057IDD#PBF is connected to the differential amplifier stage, which is composed of two transistors. The differential amplifier amplifies the difference between the two inputs. At the same time, the transistors act as broadband noise rejectors, taking out wideband noise and giving the amplifier excellent low-noise characteristics. The amplified signal is then fed to the preamplifier, which acts as an adjustable gain stage and can be used to vary the overall gain of the instrumentation amplifier. The amplified signal is then passed to the feedback amplifier, which reduces noise and increases the gain. Finally, the signal is fed to the output buffer amplifier, which is used to reduce noise and interferences, and to boost the overall output signal strength. The output buffer amplifier is also the last stage in the instrumentation amplifier, and is typically DC-coupled to the input of the operational amplifier. The operational amplifier then amplifies the signal from the output buffer amplifier and delivers it to the output.

Applications:

The LTC2057IDD#PBF is suitable for a wide variety of signal conditioning and signal processing applications. Its low-power, low-noise performance is ideal for battery-powered devices, including automotive and industrial instrumentation, portable medical equipment, and audio equipment.The instrumentation amplifier is also ideal for precision applications, such as high-precision data acquisition, industrial test and measurement, and analog-to-digital conversion. It is also commonly used as an adjustable gain element in filters and pulse-width modulators. The wide range of applications makes the LTC2057IDD#PBF a versatile and reliable instrumentation amplifier for a variety of signal processing and conditioning tasks.

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