© SUMMIT MICROELECTRONICS, Inc. 2000 • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Phone 408-378-6461 • Fax 408-378-6586 • www.summitmicro.com

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Characteristics subject to change without notice

SUMMIT

MICROELECTRONICS, Inc.

2035 3.0 5/10/00

SMP9517

FEATURES

Digitally Controlled Electronic Potentiometer

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7-Bit Digital-to-Analog Converter (DAC)

– Independent Reference Inputs

– Differential Non-Linearity of ±0.5LSB max

– Integral Non-Linearity of ±1LSB max

– Equivalent to 128-Step Potentiometer

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Unity Gain Op Amp Drives up to 1mA

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Simple Trimming Adjustment

– Debounced Pushbutton Interface

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Low Noise Operation

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“Clickless” Transitions between DAC Steps

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No Mechanical Wear-out Problem

– 1,000,000 Stores (typical)

– 100 Year Data Retention

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Operation from 2.7V to 5.5V Supply

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Low Power: 1mW max at 5V

Nonvolatile DACPOT™ Electronic Potentiometer

With Debounced Push Button Interface

OVERVIEW

The SMP9517 DACPOT trimmer is an 7-bit nonvolatile

DAC designed to replace mechanical potentiometers.

The SMP9517 includes a unity-gain amplifier to buffer the

The DACPOT trimmer operates over a supply voltage

range of 2.7V to 5.5V.

The SMP9517’s simple pushbutton input provides an ideal

interface for operator adjusted equipment. This interface

allows for quick and easy adjustment of even the most

sophisticated systems.

The SMP9517 is a pin-compatible performance upgrade

for other industry nonvolatile potentiometers. For higher

resolution applications the pin-compatible S9518 pro-

vides 256 steps with the same pushbutton interface. Both

the SMP9517 and the S9518 provide ‘clickless’ transitions

FUNCTIONAL BLOCK DIAGRAM

DWN#

VDD

8

2

VOUT

5

7-Bit

E2PROM

VL

6

VH

3

7-Bit Data

Register

Debounce Circuit

& Write Control

Logic

7-Bit DAC

UP#

1

STR#

7

GND

4

2035 T BD 3.0