CAT5401WI-25-T1

四路数字可编程电位计（ DPPA ?? ¢ ）与64丝锥和SPI接口 Quad Digitally Programmable Potentiometers DPP™ with 64 Taps and SPI Interface

The CAT5401 is four digital POTs integrated with control logic and 16 bytes of NVRAM memory. Each digital POT 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. A separate 6-bit control register WCR independently controls the wiper tap switches for each digital POT. 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 four potentiometers is automatically loaded into its respective wiper control register.The CAT5401 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.

Features

---

 |

.

Four linear-taper digital potentiometers

.

64 resistor taps per potentiometer

.

End to end resistance 2.5 kΩ, 10 kΩ, 50 kΩ or 100 kΩ

.

Potentiometer control and memory access via SPI interface: Mode 0, 0 and 1, 1

.

Low wiper resistance, typically 100 Ω

.

Nonvolatile memory storage for up to four wiper settings for each potentiometer

.

Automatic recall of saved wiper settings at power up

.

2.5 to 6.0 volt operation

.

Standby current less than 1μA

.

1,000,000 nonvolatile WRITE cycles

.

100 year nonvolatile memory data retention

.

Industrial temperature range