9

FN8222.1

September 19, 2005

PERFORMANCE CHARACTERISTICS

Contact the factory for more information.

APPLICATIONS INFORMATION

Electronic digitally controlled (XCDP) potentiometers provide three powerful application advantages; (1) the variability

and reliability of a solid-state potentiometer, (2) the flexibility of computer-based digital controls, and (3) the retentivity

of nonvolatile memory used for the storage of multiple potentiometer settings or data.

Basic Configurations of Electronic Potentiometers

Basic Circuits

I

Three terminal potentiometer;

variable voltage divider

Two terminal variable resistor;

variable current

Cascading Techniques

Buffered Reference Voltage

–

+

+5V

+V

-5V

OP-07

+V

+V

+V

X

(a)

(b)

Noninverting Amplifier

Voltage Regulator

317

Offset Voltage Adjustment

+

–

100k

Ω

10k

Ω

10k

Ω

10k

Ω

-12V

+12V

TL072

Comparator with Hysteresis

+

–

LM308A

+5V

-5V

+

–

LT311A

(for additional circuits see AN115)

X9C102, X9C103, X9C104, X9C503