DS1809-010

Memory Type:	Non-Volatile
Base Part Number:	DS1809
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Operating Temperature:	-40°C ~ 85°C
Resistance - Wiper (Ohms) (Typ):	400 (Max)
Temperature Coefficient (Typ):	750 ppm/°C
Tolerance:	±20%
Features:	--
Voltage - Supply:	5V
Series:	Dallastat™
Interface:	Pushbutton
Resistance (Ohms):	10k
Number of Taps:	64
Number of Circuits:	1
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Active
Packaging:	Tube

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Data Acquisition - Digital Potentiometers

Digital potentiometers (DPTs) are an important type of data acquisition and control device. As the name implies, they offer an electrical switch-like keypad control to adjust a device\'s parameters. At the heart of a digital potentiometer is a non-volatile solid-state resistance element, or digital potentiometer. This solid-state element is a voltage divider where, depending upon the relative resistances of two fixed components, the voltage can be divided in a range of ratios. A digital potentiometer may be a single-ended device, where the active resistance element is connected at one end only, or a differential device, where the active resistance element is connected at both ends.The DS1809-010 is a single-ended digital potentiometer. It is an application-specific integrated device that contains two components, a voltage divider and a non-volatile memory. The voltage divider is composed of two fixed resistances and the non-volatile memory stores the settings for the adjustable resistance. This chip offers a wide range of resolution, down to 1 part per million. This high resolution ensures that the output voltage remains consistent over temperature and time. The operating principle of the DS1809-010 involves the data reporting feature of the non-volatile memory and the adjustable resistance controlled by the non-volatile memory. The data reporting feature communicates the current resistance state, as well as the temperature, time, and other local state information. Then, the appropriately scaled resistance signal is generated at the adjustable resistance. This voltage divider adjusts the signal in the range of the desired resistance.The application field of the DS1809-010 is commonly found in industrial and consumer interfaces and control applications. By controlling the signal level, the digital potentiometer has the capability to regulate output powe and adjust frequency settings in oscillators, converters and amplifiers in various audio, RF and telecom systems. It can also be used to adjust screen brightness in monitors and select among several settings.In addition, digital potentiometers used in data acquisition and control systems offer the advantage of not having to calibrate the device for each application situation. This eliminates the need for an analog potentiometer and makes the system more reliable, since errors caused by leakage currents or noise are less of a concern. Furthermore, the wide adjustment range allows for adjusting the gain settings or amplifying a signal over a wide range.In conclusion, the DS1809-010 is a flexible, cost-effective solution for applications in which precise voltage settings are required. Its solid-state construction coupled with the non-volatile memory enables long-term stability as well as offering long-term reliability. With its range of resolution and wide range of applications, the DS1809-010 is sure to meet the needs of many different types of data acquisition and control applications.

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