CAT5270 Datasheet, PDF (1/10 Pages) ON Semiconductor – Dual Digitally Programmable Potentiometers (DPP) with 256 Taps & I2C Compatible Interface

CAT5270
Dual Digitally Programmable
Potentiometers (DPPt) with
256 Taps & I²C Compatible
Interface
Description
The CAT5270 is a volatile 256−tap by two channels, digitally
programmable potentiometer (DPPt) with an I²C compatible
interface. Each DPP consists of a linear taper series of resistive
elements connected between two externally accessible end points. The
tap points between each resistive element are connected to the wiper
outputs with CMOS switches. On power up the wiper position goes to
mid scale.
The CAT5270 can be used as a potentiometer or as a two terminal,
variable resistor. It is available in a 14−lead TSSOP package operating
over the industrial temperature range (−40°C to 85°C).
Features
• Two Linear Taper Digitally Programmable Potentiometers
• 256 Resistor Taps per Potentiometer
• End to End Resistance 50 kW, 100 kW
• I²C Compatible Interface
• Low Wiper Resistance 75 W (typ.)
• 2.5 V to 5.5 V Operation
• Standby Current Less than 1 mA
• Power On to Mid Scale
• 14−lead TSSOP Package
• Industrial Temperature Range
R_H0 R_H1
SDA
SCL
I²C
256−POSITION
COMPATIBLE
DECODE
INTERFACE CONTROL
R_W0
R_W1
A0
A1
CONTROL
A2
LOGIC
A3
R_L0 R_L1
Figure 1. Functional Diagram
http://onsemi.com
1
TSSOP−14
Y SUFFIX
CASE 948AM
PIN CONNECTION
1
A0
V_CC
R_LO
R_HO
R_WO
A2
SDA
TSSOP−14 (Y)
(Top View)
A3
SCL
GND
R_W1
R_H1
R_L1
A1
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
1
October, 2009 − Rev. 3
Publication Order Number:
CAT5270/D