AD7792BRUZ: 3通道、低噪声、低功耗、16位Σ-Δ型ADC,内置片内仪表放大器和基准电压源
AD7792/AD7793均为适合高精度测量应用的低功耗、低噪声、完整模拟前端,内置一个低噪声16位/24位Σ-Δ型ADC,其中含有3个差分模拟输入,还集成了片内低噪声仪表放大器,因而可直接输入小信号。当增益设置为64、更新速率为4.17 Hz时,均方根（RMS）噪声为40 nV。
两款器件均内置一个精密低噪声、低漂移内部带隙基准电压源,而且也可采用一个外部差分基准电压。其它片内特性包括可编程激励电流源、熔断电流控制和偏置电压产生器。利用偏置电压产生器可将某一通道的共模电压设置为AVDD/2。AD7792/AD7793可以采用内部时钟或外部时钟工作,输出数据速率可通过软件编程设置,可在4.17 Hz至470 Hz的范围内变化。AD7792/AD7793采用2.7 V至5.25 V电源供电,典型功耗为400 uA,采用16引脚TSSOP封装。
The AD7792/AD7793 are low power, low noise, complete analog front ends for high precision measurement applications. The AD7792/AD7793 contain a low noise 16-/24-bit Σ-Δ ADC with three differential analog inputs. The on-chip, low noise instrumentation amplifier means that signals of small amplitude can be interfaced directly to the ADC. With a gain setting of 64, the rms noise is 40 nV when the update rate equals 4.17 Hz.
The devices contain a precision low noise, low drift internal band gap reference and can accept an external differential reference. Other on-chip features include programmable excitation current sources, burnout currents, and a bias voltage generator. The bias voltage generator sets the common-mode voltage of a channel to AVDD/2.
The devices can be operated with either the internal clock or an external clock. The output data rate from the parts is software-programmable and can be varied from 4.17 Hz to 470 Hz.
The parts operate with a power supply from 2.7 V to 5.25 V. They consume a current of 400 μA typical and are housed in a 16-lead TSSOP package.
产品应用领域 Applications
- 热电偶测量
- RTD测量
- 热敏电阻测量
- 气体分析
- 工业过程控制
- 仪器仪表
- 便携式仪器仪表
- 血液分析
- 智能发射机
- 液体/气体色谱
- 6位DVM
产品应用领域 Applications
- Thermocouple measurements
- RTD measurements
- Thermistor measurements
- Gas analysis
- Industrial process control
- Instrumentation
- Portable instrumentation
- Blood analysis
- Smart transmitters
- Liquid/gas chromatography
- 6-digit DVM
AD7792BRUZ 特点
- 最高23位有效分辨率
- 均方根（RMS）噪声
- 40 nV（4.17 Hz时）
- 85 nV（16.7 Hz时）
- 功耗：400 uA（典型值）
- 省电模式：最大1 uA
- 低噪声可编程增益仪表放大器
- 带隙基准电压源,典型漂移值为4 ppm/°C
- 更新速率：4.17 Hz～470 Hz
- 3个差分输入
- 内部时钟振荡器
- 50 Hz/60 Hz同时抑制
- Up to 23 bits effective resolution
- RMS noise
- 40 nV @ 4.17 Hz
- 85 nV @ 16.7 Hz
- Current: 400 μA typical
- Power-down: 1 μA maximum
- Low noise programmable gain instrumentation amp
- Band gap reference with 4 ppm/°C drift typical
- Update rate: 4.17 Hz to 470 Hz
- 3 differential inputs
- Internal clock oscillator
- Simultaneous 50 Hz/60 Hz rejection
AD7792BRUZ 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7792BRU | Prodn | 16 ld TSSOP | 16 | 工业 |
| AD7792BRUZ | Prodn | 16 ld TSSOP | 16 | 工业 |
| AD7792BRUZ-REEL | Prodn | 16 ld TSSOP | 16 | 工业 |
| EVAL-AD7792EBZ | Prodn | EVALUATION BOARDS | - | 待定 |
AD7792BRUZ 应用技术支持与电子电路设计开发资源下载
- AD7792 数据手册DataSheet下载. pdf
- Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .PDF
- ADC模数转换器选型指南 . PDF