DS1845数据手册集成电路（IC）的数字电位计规格书PDF

描述 Description

The DS1845 Dual NV Potentiometer and Memory consists of one 100-position linear taperpotentiometer, one 256-position linear taper potentiometer, 256 bytes of EEPROM memory, and a 2-wireinterface. The device provides an ideal method for setting bias voltages and currents in controlapplications using a minimum of circuitry. The EEPROM memory allows a user to store configurationor calibration data for a specific system or device as well as provide control of the potentiometer wipersettings. Any type of user information may reside in the first 248 bytes of this memory. The next twoaddresses of EEPROM memory are for potentiometer settings. Access to this EEPROM is via anindustry standard 2-wire bus. The wiper position of the DS1845, as well as EEPROM data, can behardware write-protected using the Write Protect (WP) input pin. Up to eight DS1845s can be installedon a single 2-wire bus. Access to an individual device is achieved by using a device address that isdetermined by the logic levels of address pins A0 though A2. Additionally, the DS1845 will operatefrom 3 volt or 5 volt supplies. Three package options are available: Flip Chip Package, 16-ball CSBGAand 14-pin TSSOP.

特性 Features

• Two linear taper potentiometers
• DS1845-010 one 10k, 100 position & one 10k, 256 position
• DS1845-050 one 10k, 100 position & one 50k, 256 postition
• DS1845-100 one 10k, 100 position & one 100k, 256 position
• 256 bytes of EEPROM memory
• Access to data and potentiometer control via an I2C compatible 2-wire interface
• External Write Enable pin to protect data and potentiometer settings
• Nonvolatile wiper storage
• Operates from 3V or 5V supplies
• Packaging: Flip Chip Package, 16-ball CSBGA, 14-pin TSSOP
• Industrial operating temperature: -40°C to +85°C

简介

DS1845属于集成电路（IC）的数字电位计。由制造生产的DS1845数字电位计数字电位器是一系列集成电路器件，可提供类似于传统机械电位器或变阻器的可调节电阻，但通过电子信号而非机械输入来进行控制。虽然这些器件的电阻可耗散的电能相对有限，但其电子控制能力有助于小型化、自动化和远程控制信号级模拟电路，而这些电路本来可能会使用机械电位器。