Datasheet

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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 ASSIGNMENT

PIN DESCRIPTION

H - High-Terminal of Potentiometer

L - Low-Terminal of Potentiometer

W - Wiper of Potentiometer

- 3V or 5V Power Supply

- Chip Select

- 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

INC

, and U/

. 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.

DS1804

Nonvolatile Trimmer Potentiometer

19-5876; Rev 6/11

INC 1 8 V

U/D 2 7 CS

H 3 6 L

GND 4 5 W

DIP (300 mils)

SO (150 mils)

μSOP (118 mils)

Summary of content (10 pages)

PAGE 1
9-5876; Rev 6/11 DS1804 Nonvolatile Trimmer Potentiometer FEATURES        PIN ASSIGNMENT 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 INC 1 8 VCC U/D 2 7 CS H 3 6 L GND
PAGE 2
DS1804 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.
PAGE 3
DS1804 DS1804 BLOCK DIAGRAM Figure 1 POWER-UP/POWER-DOWN CONDITIONS On power-up, the DS1804 will load the value of EEPROM memory into the wiper position register (or 1 of 100 decoder). The value of this register can then be set to another wiper position if desired, by using the three-terminal control port. On power-up, wiper position will be loaded within a maximum time period of 500µs once the power-supply is stable. Additionally, the three-terminal interface port will be active after 50ms.
PAGE 4
DS1804 ABSOLUTE MAXIMUM RATINGS Voltage on Any Pin Relative to Ground Operating Temperature Range Storage Temperature Range Lead Temperature (soldering, 10s) Soldering Temperature (reflow) -1.0V to +6.0V -40°C to +85°C -55°C to +125°C +300°C +260°C This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied.
PAGE 5
DS1804 ANALOG RESISTOR CHARACTERISTICS (VCC = 2.7V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER SYMBOL MIN TYP -20 End-to-End Resistor Tolerance MAX UNITS NOTES +20 % 8 Absolute Linearity ±0.6 LSB 9 Relative Linearity ±0.25 LSB 10 MHz 11 -3dB Cutoff Frequency fCUTOFF Temperature Coefficient 750 ppm/°C CAPACITANCE (VCC = 2.7V to 5.5V, TA = +25°C, unless otherwise noted.) PARAMETER MAX UNITS NOTES CIN 5 pF 12 COUT 7 pF 12 (VCC = 2.7V to 5.
PAGE 6
DS1804 NOTES: 1) All voltages are referenced to ground. 2) Valid for VCC = 5V only. 3) Resistor input voltages cannot go below ground or exceed VCC by the amounts as shown in the table. 4) Maximum current specifications are based on the clock rate of INC input. This specification represents the current required when changing the wiper position. 5) Standby current levels apply when all inputs are driven to appropriate supply levels. CS , INC , U/ D = VCC.
PAGE 7
DS1804 THREE-TERMINAL INTERFACE TIMING DIAGRAM Figure 2 ORDERING INFORMATION PART DS1804-010+ VERSION (kΩ) 10 TEMP RANGE -40°C to +85°C PIN-PACKAGE 8 DIP (300 mils) DS1804-050+ 50 -40°C to +85°C 8 DIP (300 mils) DS1804-100+ 100 -40°C to +85°C 8 DIP (300 mils) DS1804Z-010+ 10 -40°C to +85°C 8 SO (150 mils) DS1804Z-050+ 50 -40°C to +85°C 8 SO (150 mils) DS1804Z-100+ 100 -40°C to +85°C 8 SO (150 mils) DS1804U-010+ 10 -40°C to +85°C 8 µSOP (118 mils) DS1804U-050+ 50 -40°C to +85°
PAGE 8
DS1804 BRANDING INFORMATION Figure 3 Top Brand Bottom Brand 8-pin DIP DS1804-nnn yywwrv ###xx cccccc 8-pin SOIC DS1804m yywwrv ###xx 8-pin uSOP 1804 rvnnn cccccc yyww ###xx DS1804 Brand Codes Description Values Code 010 050 100 10k ohm 50k ohm 100k ohm Pot Size (SOIC) X L C 10k ohm 50k ohm 100k ohm yyww Date Code. It identifies the year and work week the device was assembled eg. 0035 is the 35th work week of 2000 rv Die Revision Generally this is a letter followed by a number (eg.
PAGE 9
DS1804 PACKAGE INFORMATION For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
PAGE 10
DS1804 REVISION HISTORY REVISION DATE DESCRIPTION 6/11 Removed the flip chip package option Updated the soldering temperature information and added lead temperature information in the Absolute Maximum Ratings section Changed VIH(MAX) from VCC + 0.5V to VCC + 0.3V, changed VIL(MIN) from -0.5V to -0.3V, changed the resistor inputs min from GND - 0.5V to VGND - 0.2V and max from VCC + 0.5V to VCC + 0.