DS2890 datasheet, PDF - EEWORLD Datasheet

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DS2890: Description1-Wire Digital Potentiometer; Categoryaccessories; File Size938KB，27 Pages; ManufacturerDALLAS; Websitehttp://www.dalsemi.com

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DS2890 Overview

1-Wire Digital Potentiometer

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PRELIMINARY

DS2890

1-Wire

Digital Potentiometer

www.dalsemi.com

FEATURES

Single element 256-position linear taper

potentiometer

Supports potentiometer terminal working

voltages up to 11V

Potentiometer terminal voltage independent

of supply voltage

Potentiometer wiper position controlled and

read over minimal 1-Wire bus interface

100 kΩ resistor element value

Provides 1-Wire and V

power modes

Supports Conditional Search based on

power-on default wiper position

Multiple DS2890’s can be identified on a

common 1-Wire bus and operated

independently

Unique factory lasered 64-bit registration

number assures error free device selection

and absolute part identity

Built-in multi-drop controller ensures

compatibility with other 1-Wire Network

products

Supports Overdrive mode which boosts

communication speed up to 142 kbits per

second

-40

C to +85

C operating temperature range

2.8V – 6.0V operating voltage range

PIN ASSIGNMENT

Top View

6-pin TSOC

GND

1-WIRE

VDD

WIPER

TO-92 Package

1 2 3

Bottom View

Flip Chip Package

top view

side view

Visit

www.dalsemi.com

for Flip Chip pinout and

mechanical data.

ORDERING INFORMATION

PART NUMBER

DS2890-000

DS2890P-000

DS2890X-000

DS2890T-000

RESISTANCE

100 kΩ

PACKAGE DESCRIPTION

T0-92

6-pin TSOC

Flip Chip Pkg., Tape & Reel

Tape & Reel of DS2890

DS2890V-000

Tape & Reel of DS2890P

100 kΩ

* Contact the factory for availability of alternate resistance values

1 of 27

1-WIRE

GND

061500

DS2890

PIN DESCRIPTION

SIGNAL

NAME

1-WIRE

TYPE

I/O

FUNCTION

1-Wire bus interface. Open drain, requires external pull-up resistor. Range:

2.8V – 6.0V. See HARDWARE CONFIGURATION for pull-up resistor

recommendations.

High end terminal of potentiometer resistor element. Range: 0V – 11.0V.

Range independent of 1-Wire or V

supply levels as well as the voltage

levels applied to the other potentiometer terminals.

Low end terminal of potentiometer resistor element. Range: 0V – 11.0V.

Range independent of 1-Wire or V

supply levels as well as the voltage

levels applied to the other potentiometer terminals.

Potentiometer wiper terminal. Range 0V – 11.0V. Range independent of

1-Wire or V

supply levels as well as the voltage levels applied to the other

potentiometer terminals.

Auxiliary power supply input. Range: 2.8V – 6.0V

Ground

I/O

WIPER

I/O

GND

PWR

DESCRIPTION

The DS2890 is a linear taper digitally controlled potentiometer with 256 wiper positions. Device

operation, including wiper position, is controlled over the single contact 1-Wire bus for the ultimate in

electrical interface simplicity. With a wide 0–11 volt working voltage range for the potentiometer

terminals, the DS2890 is ideal for a broad range of industrial and control applications. Potentiometer

terminal voltage is independent of device supply voltage as well as the voltage applied to the other

potentiometer terminals. Communication with the DS2890 follows the standard Dallas Semiconductor

1-Wire protocol and can be accomplished with minimal hardware such as a single port pin of a

microcontroller. Multiple DS2890 devices can reside on a common 1-Wire bus and be operated

independently of each other. Each DS2890 has its own unalterable 64-bit ROM registration number that

is factory lasered into the chip. The registration number guarantees unique identification for absolute

traceability and is used to address the device in a multi-drop 1-Wire Network environment. The DS2890

will respond to a 1-Wire Conditional Search command if the potentiometer wiper is set at the power-on

default position. This feature enables the bus master to easily determine whether a potentiometer has

gone through a power-on reset and needs to be re-configured with a required wiper position setting. The

DS2890 supports two power modes: 1-Wire only mode in which device power is supplied parasitically

from the 1-Wire bus or V

mode where power is supplied from an external supply; when operating from

mode wiper resistance is reduced.

2 of 27

DS2890 Related Products

	DS2890	DS2890P	DS2890T	DS2890V	DS2890X	DS2890P-000	DS2890T-000	DS2890-000	DS2890V-000	DS2890X-000
Description	1-Wire Digital Potentiometer	1-Wire Digital Potentiometer	1-Wire Digital Potentiometer	1-Wire Digital Potentiometer	1-Wire Digital Potentiometer	DIGITAL POTENTIOMETER, 256 POSITIONS, PDSO6	128 x 128 pixel format, LED or EL Backlight available	1-Wire Digital Potentiometer	1-Wire Digital Potentiometer	1-Wire Digital Potentiometer

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