MAX5429EUA

Memory Type:	Non-Volatile
Base Part Number:	MAX5429
Supplier Device Package:	8-uMAX
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Operating Temperature:	-40°C ~ 85°C
Resistance - Wiper (Ohms) (Typ):	100
Temperature Coefficient (Typ):	35 ppm/°C
Tolerance:	±25%
Features:	--
Voltage - Supply:	2.7 V ~ 5.5 V
Series:	--
Interface:	Up/Down (U/D, CS)
Resistance (Ohms):	10k
Number of Taps:	32
Number of Circuits:	1
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Obsolete
Packaging:	Tube

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Introduction
The MAX5429EUA digital potentiometer is a single-channel, low-power digital potentiometer designed for low-power and low-noise (VDD = 2.7V to 5.5V) applications. It features a 3-wire interface consisting of a Serial Clock Input, a Serial Data Input, and a Serial Data Output. The Serial Data Input is used to control the position of the potentiometer’s resistor element, which can be programmed from 0 ohms to 10k ohms in 10k steps. The MAX5429EUA offers two programmable resistance ranges—10k ohms and 10k ohms—with 10k ohms and 5k ohms taps respectively. This device is also available in an ultra low-power 1.2V-1.8V version as well as in a version with an adjustable resistance range.
Application Field
The MAX5429EUA digital potentiometer is a versatile DC device that can be used in a wide variety of applications. This device can be used to adjust the gain of low-power audio amplifiers, adjust the contrast of LCD and LED displays, control analog voltage dividers, linearize temperature measurements from thermistors and RTDs, set the cut-off frequency for active filters and crossover networks, and provide a manual adjustment for servo systems and precision timing systems.
The MAX5429EUA can be used in automotive, networking, and consumer applications. Automotive applications include infotainment systems and vehicle audio systems, while networking applications include cable modems, VoIP systems, and Ethernet switches. Consumer application examples include audio systems, computers, smartphones and tablets, and medical devices. In any application where a programmable gain or frequency setting is needed, the MAX5429EUA can be used to provide a simple, adjustable solution.
Working Principle
The MAX5429EUA is a 3-wire, single-channel digital potentiometer powered by a voltage supply between 2.7V and 5.5V. It has two programmable resistance ranges: 10k Ohms and 10k Ohms with 5k Ohm taps, respectively. The potentiometer can be programmed to any resistance value by sending a serial data stream (from 0-1023) to the Serial Data Input. The device stores this value and output this value on the Serial Data Output. The serial clock pulses synchronize the data transmission/storage and data output.
The device can be operated in two modes: static and double stepped. In static mode, the output will remain constant at the last programmed resistance setting. In double stepped mode, the output will move (or step) between two adjacent resistance values. This mode allows the user to quickly select between two adjacent resistance settings and is ideal for quickly changing the output resistance setting. The double stepped mode can also be used to eliminate glitching during power up or down.
Conclusion
The MAX5429EUA digital potentiometer is a low-power and low-noise device ideal for a wide variety of applications. Its 3-wire interface makes it easy to connect and its two programmable resistance ranges make it an ideal solution for many applications, from audio amplifiers to servo systems. The MAX5429EUA also offers a double stepping mode, making it ideal for quickly changing the output resistance setting for applications such as responding to a specific user input.

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