Product Summary

The DS1267E-050 is a dual digital potentiometer chip which consists of two digitally controlled, solid-state potentiometers. Each potentiometer is composed of 256 resistive sections. Between each resistive section and both ends of the potentiometer are tap points which are accessible to the wiper. The position of the wiper on the resistive array is set by an 8-bit value that controls which tap point is connected to the wiper output. Communication and control of the device are accomplished via a 3-wire serial port interface. This interface allows the DS1267E-050 wiper position to be read or written. Both potentiometers can be connected in series (or stacked) for an increased total resistance with the same resolution. For multiple device, single-processor environments, the DS1267E-050 can be cascaded or daisy-chained. This feature provides for control of multiple devices over a single 3 wire bus. The DS1267E-050 is offered in three standard resistance values which include 10, 50, and 100 kohm versions. Available packages for the device include a 14 pin DIP, 16-pin SOIC, and 20 pin TSSOP.

Parametrics

DS1267E-050 absolute maximum ratings: (1)Voltage on Any Pin Relative to Ground (VB=GND): －0.1V to +7.0V; (2)Voltage on Resistor Pins when VB=－5.5V: －5.5V to +7.0V; (3)Voltage on VB: －5.5V to GND; (4)Operating Temperature: －40° to +85°C; (5)Storage Temperature: －55°C to +125°C; (6)Soldering Temperature: 260°C for 10 seconds.

Features

DS1267E-050 features: (1)Ultra-low power consumption, quiet, pumpless design; (2)Two digitally controlled, 256-position potentiometers; (3)Serial port provides means for setting and reading both potentiometers; (4)Resistors can be connected in series to provide increased total resistance; (5)14-pin DIP, 16-pin SOIC, 20-pin TSSOP packages; (6)Resistive elements are temperature compensated to ±0.3 LSB relative linearity.

Diagrams

DS1267E-050 pin connection

DS12
DS12
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