DS1801S

Memory Type:	Volatile
Base Part Number:	DS1801
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Operating Temperature:	-40°C ~ 85°C
Resistance - Wiper (Ohms) (Typ):	400
Temperature Coefficient (Typ):	750 ppm/°C
Tolerance:	±20%
Features:	Cascade Pin, Mute, Zero-Cross Sense
Voltage - Supply:	2.7 V ~ 5.5 V
Series:	--
Interface:	Serial
Resistance (Ohms):	45k
Number of Taps:	65
Number of Circuits:	2
Configuration:	Potentiometer
Taper:	Logarithmic
Part Status:	Active
Packaging:	Tube

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Data Acquisition - Digital PotentiometersDigital potentiometers are widely used in applications that require adjustable, linear potentials or voltage dividers. They are also used to maintain constant current in connection circuits. The DS1801S is a popular digital potentiometer made by Maxim Integrated, suitable for applications that require digital adjustability and control of resistance.The DS1801S provides an easy adjustable resistance solutions and is easy to interface. It contains a memory that stores the last adjusted resistance value, and it is quite power efficient compared to other digital potentiometers. It features an adjustable full-scale resistance range of 4 KΩ, 10 KΩ, or 40 KΩ, with resistor elements of 256, 1024, or 4096, respectively. The DS1801S is available in a space-saving 8-pin, 150 mil SOP package.The DS1801S contains a nonvolatile memory that stores the set point information and allows the circuits controlled by the DS1801S to reconfigure themselves to perform the last adjusted resistance level after being powered off, a feature that limits the time required to initialize the circuit and adjust the resistance level. The DS1801S is designed to provide an adjustable resistance solution, with low power consumption and close to zero drift, ensuring accurate and stable control.The DS1801S works by connecting a wiper terminal of an internal, high-performance resistor network to user-adjustable resistor taps. The resistor network is made up of solid-state elements that can be arranged in either a straight line or a spiral track depending on the application, which maximizes flexibility in system design and efficiency in response time. The integral nonvolatile memory stores the last adjusted resistance level, allowing for fast left-reconfiguration of the circuit.The DS1801S can also be used in a number of applications, from adjusting the gain of audio amplifiers to adjusting the cutoff frequency of filters. By connecting the adjustable terminal to an analog input, it is also possible to control the resistance level over an analog input, for example, to implement an adjustable potentiometer with an external voltage adjustment.In addition, the DS1801S can also be used in a power source configuration to control the current output level of a load, as well as a temperature sensor used to maintain a constant temperature. By connecting the DS1801S to a microcontroller, it is also possible to implement a feedback loop that adjusts the resistance level based on the sensed temperature, enabling more precise control.To sum up, the DS1801S provides a highly versatile, low-power, low-drift adjustable resistance solution, suitable for a wide range of data acquisition applications, including voltage dividers, adjustable current sources, audio amplifier gain control and temperature sensor control. With its low-power consumption, precise control and flexible design, the DS1801S is an ideal choice for digital potentiometer applications.

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