DS1669S-100+T&R

Memory Type:	Non-Volatile
Base Part Number:	DS1669
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.209", 5.30mm Width)
Operating Temperature:	-40°C ~ 85°C
Resistance - Wiper (Ohms) (Typ):	400
Temperature Coefficient (Typ):	750 ppm/°C
Tolerance:	±20%
Features:	--
Voltage - Supply:	±4.5 V ~ 8 V
Series:	Dallastat™
Interface:	Up/Down (UP, DN)
Resistance (Ohms):	100k
Number of Taps:	64
Number of Circuits:	1
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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IntroductionThe DS1669S-100+T&R is a digital potentiometer from Microchip Technology, Inc. That can be used for a wide range of applications, from providing a programmable voltage offset in the design of a high-accuracy instrumentation system to providing adjustable speed control for a motor. It is a single-turn, non-volatile device with a integrated temperature sensor. In this article, we will discuss the application field of the device and its working principle.Application FieldThe DS1669S-100+T&R can be used in a variety of applications in which programmable voltage offset is desired. Examples include motor speed control, power station voltage regulation and control of scientific instruments. Additionally, because it has a high accuracy (1LSB) and a wide resistance range (100~355kΩ), it can be useful for digital pot application in various other areas, such as LED lighting, networking and telecom systems, data acquisition, microcontrollers, and remote control systems.Working PrincipleThe working principle of the DS1669S-100+T&R is based on the change in resistance when exposed to a voltage change. It is a non-volatile device, meaning that its settings will remain unchanged if the power is disconnected. Internally, it contains an analog section, conduction section and a temperature sensor. The analog reference section functions as the “heart” of the device. It is responsible for setting the resistance of the device, as well as for obtaining the temperature information from the integrated temperature receiver. This allows the DS1669S-100+T&R to set its own resistance, based on the temperature reading. The conductive portion is responsible for transmitting the desired resistance back to the analog section. The output resistance can be varied by up to two pins, each connected to two of the device’s pins. The resistance is calculated by subtracting the voltage applied to one of the pins from the voltage applied to the other pin. The output resistance is then applied to the analog section, which then sets the resulting resistance measurement.ConclusionIn conclusion, the DS1669S-100+T&R is a digital potentiometer from Microchip Technology, Inc. that is capable of providing programmable voltage offset, as well as adjustable speed control for a motor. Its application field can be quite diverse, and its working principle is based on the change in resistance when exposed to a voltage change. It is a non-volatile device, and contains an analog section, conduction section and a temperature sensor.

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