EVAL-AD7796EBZ:  16位、低功耗、Σ-Δ型桥式传感器ADC

AD7796是一款适合电子秤等高精度桥式传感器应用的完整模拟前端,内置一个16位分辨率Σ-Δ型*内仪表放大器具有128的固定增益,因此可直接输入来自桥式传感器等的小信号。AD7796具有一个差分输入,还集成了一个温度传感器,与内部ADC直接相连,此温度传感器可用于电桥的温度补偿。

该器件可以采用内部时钟工作,或者也可采用外部时钟工作,输出数据速率可通过软件编程设置,可在4.17 Hz至123 Hz的范围内变化。这款器件采用2.7 V至5.25 V电源供电,典型功耗为250 µA,采用16引脚TSSOP封装。

The AD7796 is a complete analog front end for high precision bridge sensor applications such as weighscales. The AD7796 contains a ∑-？ ADC capable of 16-bit resolution. The on-chip instrumentation amplifier has a fixed gain of 128 so signals of small amplitude such as those from bridge sensors can be interfaced directly to the ADC.

The part has one differential input. The device also contains a temperature sensor which is internally connected to the ADC. This temperature sensor can be used to perform temperature compensation of the bridge.

The device can be operated with the internal clock, or alternatively, an external clock can be used. The output data rate from the parts is software-programmable and can be varied from 4.17 Hz to 123 Hz.The part operates with a power supply from 2.7 V to 5.25 V. It consumes a current of 250 µA typical and is housed in a 16-lead TSSOP package.

应用

• 电子秤
• 应变计
• 工业过程控制
• 仪器仪表
• 便携式仪器仪表

Applications

• Weighscales
• Strain Gauges
• Industrial Process Control
• Instrumentation
• Portable instrumentation

EVAL-AD7796EBZ 特点

• 均方根（RMS）噪声：65 nV
• 仪表放大器
• 温度传感器
• 内部时钟振荡器
• 50 Hz/60 Hz同时抑制
• 更新速率：4.17 Hz至123 Hz
• 功耗：250 µA（典型值）
• 省电模式：1 µA
• 电源电压：2.7 V至5.25 V
• 温度范围：–40°C至+85°C
• 独立接口电源
• 16引脚TSSOP封装
• RMS noise: 65 nV
• Instrumentation amp
• Temperature sensor
• Internal clock oscillator
• Simultaneous 50 Hz/60 Hz rejection
• Update rate: 4.17 Hz to 123 Hz
• Current: 250 µA typ
• Power-down: 1 µA
• Power supply: 2.7 V to 5.25 V
• –40°C to +85°C temperature range
• Independent interface power supply
• 16-lead TSSOP package

EVAL-AD7796EBZ 结构

EVAL-AD7796EBZ 技术支持

1. AD7796 数据手册DataSheet下载. pdf
2. Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .PDF
3. ADC模数转换器选型指南 . PDF