Part # AD7190 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD7190 (Rev. B)

Part Details:

4.8 kHz Ultralow Noise 24-Bit Sigma-Delta ADC with PGA AD7190 FEATURES Chromatography RMS noise: 8.5 nV @ 4.7 Hz (gain = 128) PLC/DCS analog input modules 16 noise free bits @ 2.4 kHz (gain = 128) Data acquisition Up to 22.5 noise free bits (gain = 1) Medical and scientific instrumentation Offset drift: 5 nV/°C GENERAL DESCRIPTION Gain drift: 1 ppm/°C The AD7190 is a low noise, complete analog front end for high Specified drift over time precision measurement applications. It contains a low noise, 2 differential/4 pseudo differential input channels 24-bit sigma-delta (-) analog-to-digital converter (ADC). Automatic channel sequencer The on-chip low noise gain stage means that signals of small Programmable gain (1 to 128) amplitude can be interfaced directly to the ADC. Output data rate: 4.7 Hz to 4.8 kHz Internal or external clock The device can be configured to have two differential inputs or Simultaneous 50 Hz/60 Hz rejection four pseudo differential inputs. The on-chip channel sequencer 4 general-purpose digital outputs allows several channels to be enabled, and the AD7190 Power supply sequentially converts on each enabled channel. This simplifies AVDD: 4.75 V to 5.25 V communication with the part. The on-chip 4.92 MHz clock can DVDD: 2.7 V to 5.25 V be used as the clock source to the ADC or, alternatively, an Current: 6 mA external clock or crystal can be used. The output data rate from Temperature range: ­40°C to +105°C the part can be varied from 4.7 Hz to 4.8 kHz. Interface The device has two digital filter options. The choice of filter 3-wire serial affects the rms noise/noise-free resolution at the programmed SPI, QSPITM, MICROWIRETM, and DSP compatible output data rate, the settling time, and the 50 Hz/60 Hz Schmitt trigger on SCLK rejection. For applications that require all conversions to be APPLICATIONS settled, the AD7190 includes a zero latency feature. Weigh scales The part operates with 5 V analog power supply and a digital Strain gauge transducers power supply from 2.7 V to 5.25 V. It consumes a current of

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AD7190.pdf Datasheet