SUMMIT
MICROELECTRONICS, Inc.
S9318
Nonvolatile DACPOT™ Electronic Potentiometer
With Up/Down Counter Interface
FEATURES
• Digitally Controlled Electronic Potentiometer
• 8-Bit Digital-to-Analog Converter (DAC)
– Independent Reference Inputs
– Differential Non-Linearity -
±
0.5LSB max
– Integral Non-Linearity -
±
1LSB max
• V
OUT
Value in E
2
PROM for Power-On Recall
– Equivalent to 256-Step Potentiometer
• Unity Gain Op Amp Drives up to 1mA
• Simple Trimming Adjustment
– Up/Down Counter Style Operation
• Low Noise Operation
• “Clickless” Transitions between DAC Steps
• No Mechanical Wearout 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 S9318 DACPOT™ trimmer is an 8-bit nonvolatile
DAC designed to replace mechanical potentiometers.
The S9318 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 S9318’s simple up/down counter input provides an
ideal interface for automatic test equipment to dither and
monitor the V
OUT
voltage. This interface allows for quick
and consistent calibration of even the most sophisticated
systems.
The S9318 is a pin-compatible performance upgrade for
other industry nonvolatile potentiometers. The S9318
offers double the resolution of these devices and provides
‘clickless’ transitions of V
OUT
.
FUNCTIONAL BLOCK DIAGRAM
VDD
8-bit E2 PROM
VH
-
UP/DN
INC
CS
Counter
&
Write
Control
8-bit
Data
Register
AMP
8-bit DAC
+
VOUT
VL
GND
2016 ILL2.1
SUMMIT MICROELECTRONICS, Inc.
•
300 Orchard City Drive, Suite 131
•
Campbell, CA 95008
•
Telephone 408-378-6461
•
Fax 408-378-6586
•
www.summitmicro.com
© SUMMIT MICROELECTRONICS, Inc. 1999
2016-04 4/24/99
1
Characteristics subject to change without notice
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
