DS1804Z-010+T&R Digital Potentiometer ICs 10 KOhms PCB Mount 3 V 5 V

DS1804Z-010+T&R Digital Potentiometer ICs ZXLD1356ET5TA IPG20N06S4L14AATMA1 DS1804Z 90-1804V+010

FEATURES

 Single 100-Position Taper Potentiometer

 Nonvolatile (NV) On-Demand Wiper Storage

 Operates from 3V or 5V Supplies

 Up/Down, Increment-Controlled Interface

 Available in 8-Pin (300 mils) DIP, 8-Pin (150 mils) SO, and 8-Pin (118 mils) µSOP

 -40°C to +85°C Operating Temperature Range

 Standard Resistance Values: – DS1804-010: 10kΩ – DS1804-050: 50kΩ – DS1804-100: 100kΩ

PIN DESCRIPTION

H - High-Terminal of Potentiometer

L - Low-Terminal of Potentiometer

W - Wiper of Potentiometer

VCC - 3V or 5V Power Supply

CS - Chip Select

U/ D - Up/Down Control

INC - Increment/Decrement Wiper Control

GND - Ground

DESCRIPTION

The DS1804 NV trimmer potentiometer is a nonvolatile digital potentiometer that has 100 positions. The device provides an ideal method for low-cost trimming applications using a CPU or manual control input with minimal external circuitry. Wiper position of the DS1804 can be stored in EEPROM memory on demand. The device’s wiper position is manipulated by a three-terminal port that provides an increment/ decrement counter controlled interface. This port consists of the control inputs CS , INC , and U/ D . The DS1804 is available in three resistor grades, which include a 10kΩ, 50kΩ, and 100kΩ. The device is provided in an industrial temperature grade. Additionally, the DS1804 will operate from 3V or 5V supplies and is ideal for portable application requirements. Three packaging options are available and include the 8-pin (300 mils) DIP, 8-pin (150 mils) SO, and 8-pin (118 mils) μSOP

OPERATION

The DS1804 is a single nonvolatile potentiometer. The device has a total of 100 tap-points including the L- and H- terminals. A total of 99 resistive segments exist between the L- and H- terminals. These tappoints are accessible to the W-terminal, whose position is controlled via a three-terminal control port. A block diagram of the DS1804 is shown in Figure 1. The three-terminal port of the DS1804 provides an increment/decrement interface which is activated via a chip-select input. This interface consists of the input signals CS , INC , and U/ D . These input signals control a 7-bit up/down counter. The output of the 7-bit up/down counter controls a 1 of 100 decoder to select wiper position. Additionally, this interface provides for a wiper storage operation using the CS and INC input control pins. The timing diagram for the three-terminal interface control is shown in Figure 2.

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