SUMMIT
MICROELECTRONICS, Inc.
SMP9517
Nonvolatile DACPOT™ Electronic Potentiometer
With Debounced Push Button Interface
FEATURES
Digitally Controlled Electronic Potentiometer
• 7-Bit Digital-to-Analog Converter (DAC)
– Independent Reference Inputs
– Differential Non-Linearity of ±0.5LSB max
– Integral Non-Linearity of ±1LSB max
• V
OUT
Value in EEPROM for Power-On Recall
– Equivalent to 128-Step Potentiometer
• Unity Gain Op Amp Drives up to 1mA
• Simple Trimming Adjustment
– Debounced Pushbutton Interface
• Low Noise Operation
• “Clickless” Transitions between DAC Steps
• No Mechanical Wear-out Problem
– 1,000,000 Stores (typical)
– 100 Year Data Retention
• Operation from 2.7V to 5.5V Supply
• Low Power: 1mW max at 5V
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
DAC output and enables V
OUT
to swing from rail to rail.
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
of V
OUT
.
FUNCTIONAL BLOCK DIAGRAM
VDD
8
VH
3
7-Bit
E2PROM
Debounce Circuit
& Write Control
Logic
7-Bit Data
Register
5
7-Bit DAC
VOUT
6
1
UP#
2
DWN#
7
STR#
4
GND
2035 T BD 3.0
VL
© SUMMIT MICROELECTRONICS, Inc. 2000 • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Phone 408-378-6461 • Fax 408-378-6586 • www.summitmicro.com
Characteristics subject to change without notice
2035 3.0 5/10/00
1
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
