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低压数字温度传感器允许一条单I2C总线上最高27位地址

2007年05月23日 17:06:00 中国传动网

编者注: • DS75LX数字温度传感器允许I2C 通信总线上最高27位地址 • DS75LX有27位地址组合,只允许用户一个应用中使用一个总线,一个应用设计中有8个以上I2C元件 • DS75LX中三条精确的地址线生成27位地址组合,可以选择三种放置方式的一种,连接到GND,VDD或靠左悬浮。 DS75LX是蜂窝基站,电信系统能够,网络设备及其他要求使用很多温度传感器和在一个总线上使用I2C元件的应用领域的理想选择。 加利福尼亚SUNNYVALE5约21日新闻――美信集成产品公司推出了DS75LX,这是一款数字温度传感器,允许在一个通信总线上最高27位地址。为了使27位地址连接,该温度传感器提供三条精确的地址线,可以有三种放置方式:连接到GND,VDD或靠左悬浮。大多数很有竞争力的温度传感器只允许三条地址线连接到GND或者VDD,这使得通信总线上最高达到8位地址。DS75LX增加的地址大大简化了多种I2C元件在一个应用中布置,这样使其成为蜂窝基站,网络设备和电信设备以及其他分布式温度敏感系统的最佳选择。 DS75LX的操作电压为1.7V到3.7V,可以直接连接到低压铁路。该型温度传感器经过工厂精度校准,温度范围在-25°C到+100°C内时整个电压供应范围精度为±2.0°C(最大),完全运行温度为-55°C到+125°C,精度达到±3.0°C(最大)。分辨率可以根据用户配置9位,10位,11位或12位,(转换为分辨率范围是0.5°C (9 bit)和0.0625°C (12 bit))数字温度读数报告温度。DS75LX还具有自动调节温度功能,用户定义温度点,以便定制极限温度和数据输出滞后。 此外,该传感器包括一个可选的总线超时功能,如果超过预定的时间该功能显示数据线。这就避免了两总线上发生可能锁定的问题。 官能,引脚和软件都与流行的DS75相兼容,DS75LX使得简单迁移至低压设计,可以用于无铅,8引脚µSOP (µMAX®)和8引脚SO封装。起价$0.75(1000件以上,FOB USA) µMAX是美信集成产品公司的注册商标。 **DS75LX数据资料** original text: [COLOR=#708090]Low-Voltage Digital Temperature Sensor Allows Up to 27 Addresses on a Single I2C Bus Note to Editor: • The DS75LX is a digital temperature sensor that allows up to 27 addresses on the I2C communication bus. • The DS75LX has 27 address combinations, which allows the user to use only one bus for applications that have more than eight I2C components in a design. • The DS75LX‘s three dedicated address pins can be placed in one of three states to create 27 address combinations: they can be tied to GND, tied to VDD, or left floating. The DS75LX is ideal for base stations, telecom systems, networking equipment, and other applications that require several temperature sensors and I2C components on one bus. SUNNYVALE, CA—May 21, 2007—Maxim Integrated Products (NASDAQ: MXIM) introduces the DS75LX, a digital temperature sensor that allows up to 27 addresses on one I2C communication bus. To enable 27 address combinations, this temperature sensor provides three dedicated address pins that can be placed in one of three states: tied to GND, tied to VDD, or left floating. Most competing devices only allow the three address pins to be tied to GND or VDD, resulting in a maximum of only eight addresses. The DS75LX‘s additional addresses greatly simplify applications in which several I2C components reside, thus making it ideal for base stations, networking and telecom equipment, and other distributed temperature-sensing systems. The DS75LX operates from a low 1.7V to 3.7V supply voltage, and it can be connected directly to low-voltage supply rails. The temperature sensor is factory calibrated to an accuracy of ±2.0°C (max) over its entire supply-voltage range and a wide temperature range of -25°C to +100°C. It is ±3.0°C (max) accurate over its full operating-temperature range of -55°C to +125°C. Temperature is reported as user-selectable 9-, 10-, 11-, or 12-bit digital temperature readings that translate to resolutions between 0.5°C (9 bit) and 0.0625°C (12 bit). The DS75LX also has thermostat functionality with user-defined trip points that allow the user to customize the threshold temperature and output hysteresis. Additionally, this device includes an optional bus-timeout function that releases the data line if held longer than a predetermined amount of time. This prevents any possible lockup problems that might occur on the two-wire bus. Function, pin, and software compatible with the popular DS75, the DS75LX makes it easy to migrate to low-voltage designs. It is available in both lead-free, 8-pin µSOP (µMAX®) and 8-pin SO packages. Prices start at $0.75 (1000-up, FOB USA). µMAX is a registered trademark of Maxim Integrated Products, Inc.[/COLOR]
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