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

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AD7191.pdf Datasheet