ADI AD7191BRUZ

242差分3V ~ 5.25V2.7V ~ 5.25V-40°C ~ 105°C

Overview

The AD7191BRUZ is a pin-programmable ultralow noise, 24-bit, sigma-delta Analog-to-digital Converter (ADC) for bridge sensors. 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 AD7191BRUZ are controlled by dedicated pins.

Features

• 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)

• Internal or external clock

• Bridge power-down switch

• Offset drift: 5 nV/°C

• Gain drift: 1 ppm/°C

• Specified drift over time

• Simultaneous 50 Hz/60 Hz rejection

• Internal temperature sensor

• Power supply: 3 V to 5.25 V

• Current: 4.35 mA

• Temperature range: –40°C to +105°C

• Package: 24-lead TSSOP 

Applications

• Weigh scales

• Strain gauge transducers

• Pressure measurement

• Medical and scientific instrumentation