ADA4857-1YCPZ-R7

Voltage - Input Offset:	2mV
Base Part Number:	ADA4857
Supplier Device Package:	8-LFCSP-VD (3x3)
Package / Case:	8-VFDFN Exposed Pad, CSP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply, Single/Dual (±):	4.5 V ~ 10.5 V, ±2.25 V ~ 5.25 V
Current - Output / Channel:	50mA
Current - Supply:	5mA
Series:	--
Current - Input Bias:	2µA
-3db Bandwidth:	850MHz
Slew Rate:	2800 V/µs
Output Type:	--
Number of Circuits:	1
Amplifier Type:	Voltage Feedback
Part Status:	Active
Packaging:	Tape & Reel (TR)

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ADA4857-1YCPZ-R7 Application Field and Working PrincipleLinear amplifiers are widely used in digital and analog applications. Instrumentation amplifiers, OP amps, and buffer amps all commonly employ linear amplifiers in order to optimize ac performance, increase gain and improve noise rejection.The ADA4857-1YCPZ-R7 is a high-voltage, low-power, differential-input, rail-to-rail output amplifier. The amplifier’s working principle is based on the differential amplifier configuration, wherein the two input terminals are balanced and two output terminals provide voltage gain and power amplification.The ADA4857-1YCPZ-R7 is a rail-to-rail output amplifier, meaning that both output terminals can be left floating or driven to either positive of negative rail voltage. This type of device is ideal for applications requiring fully differential signals at both the input and the output stages.When applying the circuit, it uses a differential input configuration with two bipolar transistors connected in parallel, both of which act as current sources. The bipolar transistors are connected to a single supply voltage, which can be either positive or negative, and the two inputs and two outputs all float independently. The two outputs are then connected to the common-mode voltage and the load, or alternatively to each other.The circuit works by providing a differential output signal based on the input signal difference. The input is applied to the transistor’s base and the transistor’s collector then sets the potential at the output. The transistor’s base then acts as a current source, providing a voltage across the load, which is then amplified.The ADA4857-1YCPZ-R7 amplifier can be used in several audio, imaging, instrumentation, and precision instrumentation applications. The amplifier provides high voltage gain, low cross-over distortion, low temperature drift, and low distortion.In the audio domain, the amplifier can be used to drive headphones directly from an audio signal source, as well as to amplify microphone and line-level signals. In imaging applications, the amplifier can be used to drive image sensors, driver buffer amplifiers, signal buffers, and other discrete components. In medical systems, the amplifier can be used to measure vital signs, such as blood pressure and heart rate.Instrumentation amplifiers and buffer amplifiers employ the ADA4857-1YCPZ-R7 amplifier as well to expand dynamic range, increase signal-to-noise ratio, and reject noise and electromagnetic interference. In addition, the amplifier is also used in precision instrumentation applications for high-accuracy signal transmission and condition monitoring of critical parameters.The ADA4857-1YCPZ-R7 is an excellent choice for linear amplifier applications. Its wide range of applications, small form factor, and improved performance make it an ideal choice for any application requiring a high-voltage, low-power, rail-to-rail output amplifier.

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