AD7818:片内集成温度传感器的单通道、9 µs、10位ADC

AD7818: 片内集成温度传感器的单通道、9 µs、10位ADC

AD7818 功能框图 AD7818和AD7817是10位、单通道和四通道ADC，具有片内温度传感器，可采用2.7 V至5.5 V单电源供电。各器件内置一个基于电容DAC的9 μs逐次逼近型转换器、一个±2°C精度的片内温度传感器、一个片内时钟振荡器、固有采样保持功能和一个片内基准电压源(2.5 V)。AD7816仅具有温度监控功能，采用SOIC/MSOP封装。AD7817和AD7818的片内温度传感器可以通过通道0进行访问。选择通道0并启动转换后，转换结束时产生的ADC码为环境温度的测量结果（分辨率为±0.25°C）。参见数据手册的温度测量部分。AD7817提供窄体0.15" 16引脚小型IC (SOIC)封装和16引脚超薄紧缩小型封装(TSSOP)，AD7816/AD7818提供8引脚小型IC (SOIC)封装和8引脚超小型IC (MSOP)封装。

The AD7818 and AD7817 are 10-bit, single- and 4-channel A/D converters with on-chip temperature sensor that can operate from a single 2.7 V to 5.5 V power supply. Each part contains a 9 μs successive-approximation converter based around a capacitor DAC, an on-chip temperature sensor with an accuracy of ±2°C, an on-chip clock oscillator, inherent track-andhold functionality and an on-chip reference (2.5 V). The AD7816 is a temperature monitoring only device in a SOIC/MSOP package.The on-chip temperature sensor of the AD7817 and AD7818 can be accessed via Channel 0. When Channel 0 is selected and a conversion is initiated, the resulting ADC code at the end of the conversion gives a measurement of the ambient temperature with a resolution of ±0.25°C. See Temperature Measurement section of this data sheet.The AD7816, AD7817, and AD7818 have a flexible serial interface that allows easy interfacing to most microcontrollers. The interface is compatible with the Intel 8051, Motorola SPI® and QSPI™ protocols and National Semiconductors MICROWIRE™ protocol. For more information refer to the Serial Interface section of this data sheet.The AD7817 is available in a narrow body 0.15" 16-lead small outline IC (SOIC), in a 16-lead, thin shrink small outline package (TSSOP), while the AD7816/AD7818 come in an 8-lead small outline IC (SOIC) and an 8-lead microsmall outline IC (MSOP).

AD7818 特点

10位ADC，转换时间为9 µs
1个(AD7818)和4个(AD7817)单端模拟输入通道
AD7816仅具有温度测量功能
片内温度传感器分辨率：0.25°C;误差：±2°C（-40°C至+85°C）
温度范围：-55°C至+125°C
宽电源电压范围：2.7 V至5.5 V
固有的采样保持功能
2.5 V±1%片内基准电压源
过温指示器
转换结束时自动关断
低功耗：
4 µW（10 SPS吞吐速率时）
40 µW（1 kSPS吞吐速率时）
400 µW（10 kSPS吞吐速率时）
灵活的串行接口

AD7818 技术指标

Output Type: Digital
Sensor Output: MICROWIRE (TM),QSPI (TM),SPI (TM)
Temp Res(°C/LSB): 0.25°C/LSB
Supply Voltage Range: +2.7V to +5.5V
Temp Range(s): -40 to +85

AD7818 芯片订购指

产品型号	封装	引脚	温度范围	包装和数量	报价*(100-499)	报价*1000 pcs
AD7818ARM 产品状态: 量产	8 ld MSOP	8	工业	Tube, 50	$ 3.40	$ 2.70
AD7818ARM-REEL 产品状态: 量产	8 ld MSOP	8	工业	Reel, 3000	-	$ 2.70
AD7818ARM-REEL7 产品状态: 联络ADI	8 ld MSOP	8	工业	Reel, 1000	-	-
AD7818ARMZ 产品状态: 量产	8 ld MSOP	8	工业	Tube, 50	$ 3.11	$ 2.46
AD7818ARMZ-REEL 产品状态: 量产	8 ld MSOP	8	工业	Reel, 3000	-	$ 2.46
AD7818ARMZ-REEL7 产品状态: 量产	8 ld MSOP	8	工业	Reel, 1000	-	$ 2.46
AD7818ARZ 产品状态: 量产	8 ld SOIC	8	商业	Tube, 98	$ 3.11	$ 2.46
AD7818ARZ-REEL7 产品状态: 量产	8 ld SOIC	8	商业	Reel, 1000	-	$ 2.46