AD7191BRUZ: Pin-Programmable, Ultralow Noise, 24-Bit, Sigma-Delta ADC for Bridge Sensors

The AD7191 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) ADC. The on-chip low noise gain stage means that signals of small amplitude can be interfaced directly to the ADC. It contains two differential analog inputs. The part also includes a temperature sensor that can be used for temperature compensation.

For ease-of-use, all the features of the AD7191 are controlled by dedicated pins. The on-chip PGA has a gain of 1, 8, 64, or 128, supporting a full-scale differential input of ±5 V, ±625 mV, ±78 mV, or ±39 mV. The output data rate can be programmed to 10 Hz, 50 Hz, 60 Hz, or 120 Hz. Simultaneous 50 Hz and 60 Hz rejection is obtained when the output data rate is set to 10 Hz or 50 Hz; 60 Hz only rejection is obtained when the output data rate is set to 60 Hz. The AD7191 can be operated with the internal clock, or an external clock can be used.

The part operates with a power supply of 3 V to 5.25 V. It consumes a current of 4.35 mA. It is available in a 24-lead TSSOP package

Applications

• Weigh scales
• Strain gauge transducers
• Pressure measurement
• Medical and scientific instrumentation

AD7191BRUZ 特点

• Pin-programmable output rate
• Output data rate: 10 Hz, 50 Hz, 60 Hz, 120 Hz
• Pin-programmable PGA
• Gain: 1, 8, 64, 128
• Pin-programmable power-down and reset
• RMS noise: 15 nV @ 10 Hz (gain = 128)
• Up to 21.5 noise free bits (gain = 1)
• Please see data sheet for additional features

AD7191BRUZ 功能框图

AD7191 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7191BRUZ	量产	24 ld TSSOP	24	工业
AD7191BRUZ-REEL	量产	24 ld TSSOP	24	工业

AD7191BRUZ 应用技术支持与电子电路设计开发资源下载

1. AD7191 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