CAT5140: Digital Potentiometer (POT), 256-Tap, with I2C Interface and Integrated EEPROM

The CAT5140 is a single channel non-volatile 256-tap digital POT. This digital POT is comprised of a series of equal value resistor elements connected between two externally accessible end points. The tap points between each resistive element can be selectively connected to the wiper output via internal CMOS switches forming a linear taper electronic potentiometer.The CAT5140 contains a volatile wiper register (WR) and an 8-bit non-volatile EEPROM for wiper position and 5 additional non-volatile registers for general purpose data storage. Programming of the registers is controlled via I2C interface. On power up, the wiper position is reset to the most recent value stored in the non-volatile memory register (IVR).The CAT5140 operates over the industrial temperature range of -40°C to +85°C.

Features

400 kHz I2C Compatible Interface
256 Position Linear Taper Potentiometer
End-to-End Resistance = 50 kΩ / 100 kΩ
TCR = 100 ppm/°C (typical)
Standby Current = 2 µA (max)
Typical Wiper Resistance = 70 Ω @ 3.3 V
Operating Voltage = 2.5 V to 5.5 V
6 Registers 8-bit Non-volatile EEPROM
2,000,000 Data Write Stores
100 Year Data Retention
8-Lead MSOP Package
Pb-free RoHS Compliant: NiPdAu Plating

Applications

Gain Adjustment and Line Impedance Matching
Automated Calibration
Contrast, Brightness and Volume Control
LCD Screen Adjustment

End Products

Instrumentation for Handheld, Portable Devices
Industrial Automation for Handheld, Portable Devices
Portable Games

Application Notes (5)

Document Title	Document ID/Size	Revision
Improving the Resolution of Digital Potentiometer (POT) Applications	AND8420/D (99.0kB)	1
Making a Stop-less Digital Potentiometer (POT)	AND8421/D (98.0kB)	1
Operating Speeds of Digital Potentiometers (POTs)	AND8419/D (101.0kB)	1
Power-up and Power-down Characteristics for Digital Potentiometers (POTs)	AND8422/D (96.0kB)	1
Push Button Control of Digital Potentiometers (POTs) with an Increment/Decrement Interface	AND8417/D (105.0kB)	1

Package Drawings (1)

Document Title	Document ID/Size	Revision
MSOP 8, 3x3	846AD (56.5kB)	revo

Data Sheets (1)

Document Title	Document ID/Size	Revision	Revision Date
Digital Potentiometer (POT), 256-Tap, with I2C Interface and Integrated EEPROM	CAT5140/D (166.0kB)	4

Order Information

Product	Status	Compliance	Package		MSL*	Container		Budgetary Price/Unit
CAT5140ZI-00-GT3	Active	Pb-free Halide free	MSOP-8	846AD	1	Tape and Reel	3000	$1.08
CAT5140ZI-50-GT3	Active	Pb-free Halide free	MSOP-8	846AD	1	Tape and Reel	3000	$1.08