Part # AD7191 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD7191 (Rev. A)


Part Details:

Pin-Programmable, Ultralow Noise, 24-Bit, Sigma-Delta ADC for Bridge Sensors AD7191 FEATURES GENERAL DESCRIPTION Pin-programmable output rate The AD7191 is a low noise, complete analog front end for high Output data rate: 10 Hz, 50 Hz, 60 Hz, 120 Hz precision measurement applications. It contains a low noise, Pin-programmable PGA 24-bit sigma-delta (-) ADC. The on-chip low noise gain Gain: 1, 8, 64, 128 stage means that signals of small amplitude can be interfaced Pin-programmable power-down and reset directly to the ADC. It contains two differential analog inputs. RMS noise: 15 nV @ 10 Hz (gain = 128) The part also includes a temperature sensor that can be used for Up to 21.5 noise free bits (gain = 1) temperature compensation. Internal or external clock For ease-of-use, all the features of the AD7191 are controlled by Bridge power-down switch dedicated pins. The on-chip PGA has a gain of 1, 8, 64, or 128, Offset drift: 5 nV/°C supporting a full-scale differential input of ±5 V, ±625 mV, Gain drift: 1 ppm/°C ±78 mV, or ±39 mV. The output data rate can be programmed Specified drift over time to 10 Hz, 50 Hz, 60 Hz, or 120 Hz. Simultaneous 50 Hz and 60 Hz Simultaneous 50 Hz/60 Hz rejection rejection is obtained when the output data rate is set to 10 Hz Internal temperature sensor or 50 Hz; 60 Hz only rejection is obtained when the output data Power supply: 3 V to 5.25 V rate is set to 60 Hz. The AD7191 can be operated with the Current: 4.35 mA internal clock, or an external clock can be used. Temperature range: ­40°C to +105°C Package: 24-lead TSSOP 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 INTERFACE TSSOP package. 2-wire serial SPI, QSPITM, and MICROWIRETM compatible Schmitt trigger on SCLK APPLICATIONS Weigh scales Strain gauge transducers Pressure measurement Medical and scientific instrumentation


Please click the following link to download the datasheet:

AD7191.pdf Datasheet