ADI AD5111 128节点数字电位计解决方案

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 lev...