Part # AD7192 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD7192 (Rev. A)


Part Details:

4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA AD7192 FEATURES Temperature measurement RMS noise: 11 nV @ 4.7 Hz (gain = 128) Chromatography 15.5 noise-free bits @ 2.4 kHz (gain = 128) PLC/DCS analog input modules Up to 22 noise-free bits (gain = 1) Data acquisition Offset drift: 5 nV/°C Medical and scientific instrumentation Gain drift: 1 ppm/°C GENERAL DESCRIPTION Specified drift over time The AD7192 is a low noise, complete analog front end for high 2 differential/4 pseudo differential input channels precision measurement applications. It contains a low noise, Automatic channel sequencer 24-bit sigma-delta (-) analog-to-digital converter (ADC). Programmable gain (1 to 128) The on-chip low noise gain stage means that signals of small Output data rate: 4.7 Hz to 4.8 kHz amplitude can be interfaced directly to the ADC. Internal or external clock Simultaneous 50 Hz/60 Hz rejection The device can be configured to have two differential inputs or 4 general-purpose digital outputs four pseudo differential inputs. The on-chip channel sequencer Power supply allows several channels to be enabled, and the AD7192 sequentially AVDD: 3 V to 5.25 V converts on each enabled channel. This simplifies communication DVDD: 2.7 V to 5.25 V with the part. The on-chip 4.92 MHz clock can be used as the Current: 4.35 mA clock source to the ADC or, alternatively, an external clock or Temperature range: ­40°C to +105°C crystal can be used. The output data rate from the part can be Package: 24-lead TSSOP varied from 4.7 Hz to 4.8 kHz. INTERFACE The device has two digital filter options. The choice of filter affects the rms noise/noise-free resolution at the programmed 3-wire serial output data rate, the settling time, and the 50 Hz/60 Hz SPI, QSPITM, MICROWIRETM, and DSP compatible rejection. For applications that require all conversions to be Schmitt trigger on SCLK settled, the AD7192 includes a zero latency feature. APPLICATIONS The part operates with a power supply from 3 V to 5.25 V. It Weigh scales consumes a current of 4.35 mA. It is housed in a 24-lead TSSOP


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AD7192.pdf Datasheet