Features: Two linear-taper digitally programmablepotentiometers
64 resistor taps per potentiometer
End to end resistance 2.5k, 10k, 50k or 100k
Potentiometer control and memory access viaSPI interface: Mode (0, 0) and (1, 1)
Low wiper resistance, typically 80
Nonvolatile memory storage for up to four wipersettings for each potentiometer
Automatic recall of saved wiper settings atpower up
2.5 to 6.0 volt operation
Standby current less than 1A
1,000,000 nonvolatile WRITE cycles
100 year nonvolatile memory data retention
24-lead SOIC, 24-lead TSSOP, and BGA
Industrial temperature ranges
Pinout
SpecificationsTemperature Under Bias .................. -55°C to +125°C
Storage Temperature ........................ -65°C to +150°C
Voltage on any Pin with
Respect to VSS
(1)(2) .......................................... -2.0V to +VCC +2.0V
VCC with Respect to Ground ................ -2.0V to +7.0V
Package Power Dissipation
Capability (TA = 25°C) ....................................... 1.0W
Lead Soldering Temperature (10 secs) ............ 300°C
Wiper Current.................................................. +12mA
Description
The CAT5411 is two Digitally Programmable Potentiometers (DPPs™) integrated with control logic and 16 bytes of NVRAM memory. Each DPP consists of a series of 63 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. CAT5411 separate 6-bit control register (WCR) independently controls the wiper tap switches for each DPP. Associated with each wiper control register are four 6-bit non-volatile memory data registers (DR) used for storing up to four wiper settings. Writing to the wiper control register or any of the non-volatile data registers is via a SPI serial bus. On power-up, the contents of the first data register (DR0) for each of the two potentiometers is automatically loaded into its respective wiper control register.
The CAT5411 can be used as a potentiometer or as a two terminal, variable resistor. It is intended for circuit level or system level adjustments in a wide variety of applications.
CAT5411 Data Sheet
