AD5173BRM100-RL7

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Taper:	Linear
Configuration:	Rheostat
Number of Circuits:	2
Number of Taps:	256
Resistance (Ohms):	100k
Interface:	I²C
Memory Type:	OTP
Voltage - Supply:	2.7 V ~ 5.5 V
Features:	Selectable Address
Tolerance:	±20%
Temperature Coefficient (Typ):	35 ppm/°C
Resistance - Wiper (Ohms) (Typ):	160
Operating Temperature:	-40°C ~ 125°C
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package:	10-MSOP
Base Part Number:	AD5173

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Introduction

Digital potentiometers, also referred to as digipots, are programmable analog components that are suitable for various applications, including data acquisition. The AD5173BRM100-RL7 is a digital potentiometer manufactured by Analog Devices, which incorporates a small feature size, low power consumption, and a large resistance range in a very small package. This makes it ideal for a wide range of applications. In this article, we will review the application fields and working principles of the AD5173BRM100-RL7.

Application Field

The AD5173BRM100-RL7 are general-purpose digital potentiometers that can be used in a variety of applications, such as adjustable gain control, gain trim, data acquisition, and trim adjustment. The AD5173BRM100-RL7 features a resistance range of 100Ω and a low minimum/maximum operating temperature of -40°C/85°C.The AD5173BRM100-RL7 is designed to provide excellent accuracy and stability over a wide temperature range, with a maximum error of ±0.1% max full-scale setting and a resolution of 8-bits. The device also features low power consumption, so it can be used in battery-powered systems and applications. Additionally, the AD5173BRM100-RL7 also provides temperature compensation, which reduces the effects of temperature on the adjustment range.

Working Principle

The AD5173BRM100-RL7 digital potentiometer is a three-terminal device and is based on the mechanical wiper principle. It consists of an electronically-actuated wiper bridge that moves between two end contacts, known as the wiper contacts, and a resistive element, known as the resistive element. The resistance of the element is adjustable between the two contacts, allowing the resistance to be varied.The AD5173BRM100-RL7 uses an internal logic circuit to detect the pressure applied to the wiper contact and convert it into a digital signal. This digital signal then controls the movement of the wiper bridge and modulates the resistance value. This is done by a process known as Pulse Width Modulation (PWM), where the wiper position is varied at a fixed frequency. As the wiper bridge moves, the resistance of the bridge either increases or decreases. This resistance, in turn, changes the resistance path from the input terminal (longer if the resistance increases) to the output terminal (longer if the resistance decreases). This change in resistance creates the effect of varying resistance between the two terminals, allowing the resistance to be adjusted.

Conclusion

The AD5173BRM100-RL7 digital potentiometer is an ideal solution for data acquisition applications, as it features a wide resistance range, excellent accuracy and stability, and low power consumption. The device also includes temperature compensation, which reduces the effects of temperature on the adjustment range. Furthermore, the AD5173BRM100-RL7 employs the mechanical wiper principle, where the resistance between the input and output terminal is adjusted by a Pulse Width Modulation process.

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