S9318

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 VOUT Value in E2PROM 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 VOUT 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 VOUT 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 VOUT. FUNCTIONAL BLOCK DIAGRAM VDD 8-bit E2 P...