ADA4610-2ACPZ-RL

Current - Input Bias:	5pA
Base Part Number:	ADA4610
Supplier Device Package:	8-LFCSP-WD (3x3)
Package / Case:	8-WFDFN Exposed Pad, CSP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply, Single/Dual (±):	±4.5 V ~ 15 V
Current - Output / Channel:	79mA
Current - Supply:	1.6mA
Voltage - Input Offset:	400µV
Series:	--
-3db Bandwidth:	9.5MHz
Gain Bandwidth Product:	16.3MHz
Slew Rate:	61 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	2
Amplifier Type:	J-FET
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The ADA4610-2ACPZ-RL is an instrumentation amplifier (or IA) that offers a unique combination of high performance, relatively low power consumption, and overall cost-effectiveness. It is basically a 3-opamp instrumentation amplifier, generally used in various control, data acquisition and monitoring applications.

Application Field

The ADA4610-2ACPZ-RL amplifiers are highly useful for a variety of data acquisition and monitoring tasks such as patient-, aircraft-, and automotive monitoring, environmental sensing, and industrial process control. It is also used in active analog filters and signal conditioning applications such as bridge and weight scales with strain gages, as well as filtration and mixing.In general, the instrumentation amplifiers like the ADA4610-2ACPZ-RL are designed to amplify small differential signals while rejecting any common-mode signals, which is important in applications such as ECG, EEG and other medical instruments where the difference between two signal sources must be amplified without amplifying any outside interference.

Working Principle

The instrumentation amplifier (IA) or in-amp is a differential-input device that amplifies the difference between two signal inputs while rejecting any signal common to both inputs. The ADA4610-2ACPZ-RL consists primarily of three op-amps-two as active differential amplifier and one as a differential-input summing amplifier. It can handle up to a 500 kHz bandwidth, with a gain range from 1 to 10,000 and an input range from 0.665 mV to 6.1 V on single or dual supplies of 3 V to 5.5 V.The working of the ADA4610-2ACPZ-RL can be understood in two parts. The first part involves the two active differential amplifier op-amps, A1 and A2, as they provide low input bias current, low offset voltage and low distortion. The two op-amps amplify the V1 and V2 signals, with a gain of (1 + Rf/Rg), while applying a common-mode feedback loop using the CMFB terminal.The second part of the ADA4610-2ACPZ-RL involves the summing op-amp A3 that further amplifies the differential output of A1-A2 and adds the common-mode signal back to the output. To reduce the errors due to input signal mismatch, an external gain-adjustable composite current-feedback loop is also used. This loop adjusts the gain of the output to (1 + Rf/Rg/Cs/Cf).

Conclusion

In conclusion, the ADA4610-2ACPZ-RL is a low power, cost-effective instrumentation amplifier that offers high performance and accuracy. Its 3-opamp design makes it suitable for various control, data acquisition and monitoring applications, where it can amplify small differential signals while rejecting any common-mode signals. Moreover, the utilization of a gain-adjustable composite current-feedback loop makes it possible to reduce the errors due to input signal mismatch.

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