The AD7982 is an 18-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7982 samples the voltage difference between the IN+ and IN- pins. The voltages on these pins usually swing in opposite phases between 0 V and VREF. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.
The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.The AD7982 is available in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from -40°C to +85°C.
AD7982是一款18位、逐次逼近型模数转换器（ADC）,采用单电源（VDD）供电。它内置一个低功耗、高速、18位采样ADC和一个多功能串行接口端口。在CNV上升沿,AD7982对IN+与IN-引脚之间的电压差进行采样,这两个引脚上的电压摆幅通常在0 V至V REF之间、相位相反。基准电压（REF）由外部提供,并且可以独立于电源电压（VDD）。其功耗和吞吐量呈线性变化关系。
SPI兼容串行接口还能够利用SDI输入,将几个ADC以菊花链形式连结到单三线式总线上,并提供一个可选的忙闲指示。采用独立电源VIO时,该器件与1.8V、2.5V、3V和5V逻辑兼容。
AD7982采用10引脚MSOP封装或10引脚QFN （LFCSP）封装,工作温度范围为-40°C至+85°C
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7982BCPZ-RL | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7982BCPZ-RL7 | Prodn | 10 ld LFCSP (3x3mm) | 10 | 工业 |
| AD7982BRMZ | Prodn | 10 ld MSOP | 10 | 工业 |
| AD7982BRMZRL7 | Prodn | 10 ld MSOP | 10 | 工业 |