ds1809u-100t-r Maxim Integrated Products, Inc., ds1809u-100t-r Datasheet

ds1809u-100t-r

Manufacturer Part Number

ds1809u-100t-r

Description

Ds1809 Dallastat

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.DS1809U-100T-R.pdf (9 pages)

Current page: 1 of 9
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FEATURES

PIN DESCIPTION

STR

GND

DESCRIPTION

The DS1809 Dallastat is a nonvolatile digitally controlled potentiometer that provides 64 uniform wiper

positions over the entire resistor range; including the high-end and low-end terminals of the device. The

DS1809 is a low power device capable of operating from power supplies of +4.5V to +5.5V. The device

is ideal for low-power, portable, or battery powered applications.

Wiper position is maintained in the absence of power. This is accomplished via the use of an EEPROM

cell array. The device provides for two storage methods, which include an auto-store capability and a

command-initiated storage function. The EEPROM cell array is specified to accept greater than 50k

writes. Storage of the wiper position is discussed in the Wiper Storage section of this datasheet.

Wiper positioning is controlled via a patented dual pushbutton (or contact closure) interface. For simple

pushbutton-controlled applications or CPU-generated control signals, external debounce circuitry is not

needed. The control interface will support both repetitive pulse inputs and continuous pulse (“push-and-

hold”) inputs. Repetitive pulse and continuous pulse control as well as timing diagrams are discussed in

the section entitled “OPERATION.”

www.dalsemi.com

64-position linear taper

Two nonvolatile wiper storage options

Operates from +4.5 to +5.5-volt supplies

Operating Temperature Range:

- Industrial: -40 C to +85 C

Electronic interface provides either digital or

pushbutton control

Low-cost alternative to mechanical solutions

Standard Resistance Values

- DS1809-010

- DS1809-050

- DS1809-100

- Supply Voltage

- High End of Resistor

- Low End of Resistor

- Wiper Terminal

- Up Control Input

- Down Control Input

- Storage Enable Input

- Ground

10 k

50 k

100 k

1 of 9

PIN ASSIGNMENT

STR

8-Pin SOIC (150-mil)

8-Pin µSOP (118-mil)

8-Pin DIP

GND

Dallastat

DS1809

011501

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ds1809u-100t-r Summary of contents

Page 1

FEATURES 64-position linear taper Two nonvolatile wiper storage options Operates from +4.5 to +5.5-volt supplies Operating Temperature Range: - Industrial: - +85 C Electronic interface provides either digital or pushbutton control Low-cost alternative to mechanical solutions Standard ...

Page 2

The DS1809 is available in standard and 100 k =resistor versions. The DS1809 is provided as an industrial temperature grade part only. Available packaging for the DS1809 include an 8- lead (300-mil) DIP an ...

Page 3

The total time to transcend the entire potentiometer given a continuous pulse input is provided by the equation: ½(second 100 ms = 6.7 (seconds) If the wiper position of the DS1809 is incremented to ...

Page 4

PUSHBUTTON CONFIGURATION Figure assumed that the STR input will be controlled by either external logic or CPU driven. No external capacitors or diodes are needed for the command-initiated storage operation. The STR input will take precedence over ...

Page 5

PUSHBUTTON TIMING DIAGRAMS Figure 4 If during any pushbutton activity the STR input is activated, pushbutton operation will be suspended until the storage of EEPROM has been completed. Once complete, pushbutton inputs, if still active, will resume from the point ...

Page 6

ABSOLUTE MAXIMUM RATINGS* Voltage on Any Pin Relative to Ground Operating Temperature Storage Temperature Soldering Temperature * This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the ...

Page 7

AC ELECTRICAL CONDITIONS PARAMETER Single Input Pulse Width Repetitive Pulse High Time Continuous Pulse Storage Control Pulse Capacitance ANALOG RESISTOR CHARACTERISTICS ELECTRICAL CONDITIONS PARAMETER End-to-End Resistor Tolerance Absolute Linearity Relative Linearity -3 dB Cutoff Frequency Temperature Coefficient NOTES: 1. All ...

Page 8

Valid only. 15. Absolute linearity is used to compare measured wiper voltage versus expected wiper voltage as determined by wiper position. The DS1809 is specified to provide a absolute linearity of ±0.60 LSB. 16. Relative linearity ...

Page 9

... ORDERING INFORMATION ORDERING NUMBER DS1809-010 DS1809-050 DS1809-100 DS1809U-010 DS1809U-050 DS1809U-100 DS1809Z-010 DS1809Z-050 DS1809Z-100 PACKAGE OPERATING TEMPERATURE 8-PIN DIP -40C to +85C 8-PIN DIP -40C to +85C 8-PIN DIP -40C to +85C 8-PIN µSOP -40C to +85C 8-PIN µSOP -40C to +85C 8-PIN µSOP -40C to +85C 8-PIN SOIC ...

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