ADI AD5111 128节点数字电位计解决方案

2012年05月15日 11:11 发布者：1770309616

ADI公司的AD5111/AD5113/AD5115是128－/64－/32节点数字电位计,电阻误差±8%,A,B和W引脚的电流为±6 mA ,正常电阻为5 kΩ, 10 kΩ, 80 kΩ,温度系数为35 ppm/℃,单电源2.3V-5.5V工作,主哟用在替代机械电位器,手持式电平调整仪,音量控制,可编程电压/电流转换,可编程滤波器,延迟以及传感器校准等.本文介绍了AD5111/AD5113/AD5115主要特性,功能方框图以及AD5111评估板主要特性,电离路图,材料清单和PCB布局图.

The AD5111/AD5113/AD5115 provide a nonvolatile solution for 128-/64-/32-position adjustment applications, offering guaranteed low resistor tolerance errors of ±8% and up to ±6 mA current density in the A, B, and W pins. The low resistor tolerance, low nominal temperature coefficient, and high bandwidth simplify open-loop applications, as well as tolerance matching applications. The new low wiper resistance feature minimizes the wiper resistance in the extremes of the resistor array to only 45 Ω, typical. A simple 3-wire up/down interface allows manual switching or high speed digital control with clock rates up to 50 MHz. The AD5111/AD5113/AD5115 are available in a 2 mm × 2 mm LFCSP package. The parts are guaranteed to operate over the extended industrial temperature range of −0℃ to +125℃.

AD5111/AD5113/AD5115主要特性:

Single-channel, 128-/64-/32-position resolution

5 kΩ, 10 kΩ, 80 kΩ nominal resistance

Maximum ±8% nominal resistor tolerance error

Low wiper resistance ±6 mA maximum wiper current density

Rheostat mode temperature coefficient: 35 ppm/℃

Potentiometer mode temperature coefficient: 5 ppm/℃

2.3 V to 5.5 V single-supply operation

Power-on EEPROM refresh time < 50 μs

Simple up/down manual or digital configurable control

Chip select enable multiple device operation

50-year typical data retention at 125℃ 1 million write cycles

Wide operating temperature: −0℃ to +125℃

Thin, 2 mm × 2 mm × 0.55 mm 8-lead LFCSP package

AD5111/AD5113/AD5115应用:

Mechanical potentiometer replacement

Portable electronics level adjustment

Audio volume control

Low resolution DAC LCD panel brightness and contrast control

Programmable voltage to current conversion

Programmable filters, delays, time constants

Feedback resistor programmable power supply

Sensor calibration

图1.AD5111/AD5113/AD5115功能方框图

AD5111评估板

This user guide describes the evaluation board for evaluating the AD5111—a single-channel, 128-position, nonvolatile memory digital potentiometer.

The AD5111 supports single-supply 2.3 V to 5.5 V operation, making the device suited for battery-powered applications and many other applications, offering guaranteed low resistor tolerance errors of ±8% and high bandwidth while allowing up to ±6 mA current density in the A, B, and W pins.

A simple 3-wire up/down interface allows manual switching or high speed digital control with clock rates up to 50 MHz. The EVAL-AD5111SDZ can operate in single-supply mode and incorporates an internal power supply from the USB.

Complete specifications for the AD5111 part can be found in the AD5111 data sheet, which is available from Analog Devices, Inc., and should be consulted in conjunction with this user guide when using the evaluation board.

AD5111评估板主要特性:

Full-featured evaluation board for the AD5111

Several test circuits

Various ac/dc input signals

PC control via a separately purchased system demonstration platform (SDP)

PC control software

PACKAGE CONTENTS

EVAL-AD511xSDZ evaluation board

CD that includes

Self-installing software that allows users to control the board and exercise all functions of
the device

Electronic version of the AD5111 data sheet

Electronic version of the UG-323 user guide