AD7151BRMZ: 用于近程传感的超低功耗单通道电容式转换器

AD7151采用一种响应快速的超低功耗转换器,为电容式近程传感器提供了一种全面的信号处理解决方案。AD7150是AD7151的双通道形式。

AD7151采用ADI公司的电容-数字转换器（CDC）技术,这种技术汇集了与实际传感器接口过程中起着重要作用的众多特性于一身,如高输入灵敏度,较高的输入寄生接地电容和泄漏电流容限。

集成自适应式阈值算法可对因环境因素（如湿度和温度）或绝缘材料老化而导致传感器电容发生的任何变化进行补偿。

默认情况下,AD7151采用固定加电设置以独立模式运行,并以一路数字输出显示检测结果。另外,AD7151也可通过串行接口与微控制器连接,可通过用户自定义设置对内部寄存器进行编程,而数据和状态信息则可从该器件中读取。

AD7151工作电源电压为2.7 V至3.6 V,额定温度范围为-40°C至+85°C。

产品应用领域 Applications

近程传感
无触点开关
位置检测
液位检测

The AD7151 delivers a complete signal processing solution for capacitive proximity sensors, featuring an ultra-low power converter with fast response time. The AD7150 is a two-channel alternative to the AD7151.

The AD7151 uses Analog Devices, Inc., capacitance-to-digital converter (CDC) technology, which combines features important for interfacing to real sensors, such as high input sensitivity and high tolerance of both input parasitic ground capacitance and leakage current.

The integrated adaptive threshold algorithm compensates for any variations in the sensor capacitance due to environmental factors like humidity and temperature or due to changes in the dielectric material over time.

By default, the AD7151 operates in standalone mode using the fixed power-up settings and indicates detection on a digital output. Alternatively, the AD7151 can be interfaced to a microcontroller via the serial interface, the internal registers can be programmed with user-defined settings, and the data and status can be read from the part.The AD7151 operates with a 2.7 V to 3.6 V power supply. It is specified over the temperature range −40°C to +85°C.

.AD7151BRMZ 特点

超低功耗
工作电压（V）：2.7 V至3.6 V；
工作电流：70 µA
响应时间：10 ms
自适应式环境补偿技术
1个电容输入通道
传感器电容（CSENS）0 pF,最高13 Pf
灵敏度可达1 fF
经过EMC测试
两种运行模式
固定设置的独立运行模式
用户自定义设置的微控制器接口运行模式
近程检测输出标志
双线串行接口（I²C兼容）
工作温度：
-40°C至+85°C
10引脚MSOP封装
Ultra-low power
2.7 V to 3.6 V, 70 µA
Response time: 10 ms
Adaptive environmental compensation
1 capacitance input channel
Sensor capacitance (CSENS) 0 up to 13 pF
Sensitivity to 1 fF
EMC tested
2 modes of operation
Standalone with fixed settings
Interfaced to a microcontroller for user-defined settings
Proximity detection output flag
2-wire serial interface (I²C-compatible)
Operating temperature −40°C to +85°C
10-lead MSOP package

AD7151BRMZ 功能框图

AD7151BRMZ 技术指标

Resolution (Bits)	12bit
T-Put Rate	100SPS
# Chan	1
Supply V	Single(+2.7 to +3.6)
Pwr Diss (max)	0.3mW

AD7151订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7151BRMZ	量产	10 ld MSOP	10	工业
AD7151BRMZ-REEL	量产	10 ld MSOP	10	工业

民用温度范围：0 ºC～＋70 ºC
军用温度范围：－55ºC ～＋125ºC
工业用温度范围：不同型号的产品的温度范围可能不同。
汽车工作温度范围：-40 ℃～ +125 ℃