The AD7195 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC). The on-chip low noise gain stage means that signals of small amplitude can be interfaced directly to the ADC. The AD7195 contains ac excitation, which is used to remove dc-induced offsets from bridge sensors.
The device can be configured to have two differential inputs or four pseudo differential inputs. The on-chip channel sequencer allows several channels to be enabled, and the AD7195 sequentially converts on each enabled channel. This simplifies communication with the part. The on-chip 4.92 MHz clock can be used as the clock source to the ADC or, alternatively, an external clock or crystal can be used. The output data rate from the part can be varied from 4.7 Hz to 4.8 kHz.
The device has two digital filter options. The choice of filter affects the rms noise/noise-free resolution at the programmed output data rate, the settling time, and the 50 Hz/60 Hz rejec-tion. For applications that require all conversions to be settled, the AD7195 includes a zero latency feature. The part operates with a 5 V analog power supply and a digital power supply from 2.7 V to 5.25 V. It consumes a current of 6 mA. It is housed in a 32-lead LFCSP package.
|Title||Content Type||File Type|
|AD7195: 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation (Rev 0, 01/2010) (pdf, 656 kB)||Data Sheets|
|AN-1131: Chopping on the AD7190, AD7192, AD7193, AD7194, and AD7195 (pdf, 125 kB)||Application Notes|
|AN-1084: Channel Switching: AD7190, AD7192, AD7193, AD7194, AD7195 (pdf, 118 kB)||Application Notes|
|AN-1069: Zero Latency for the AD7190, AD7192, AD7193, AD7194, and AD7195 (pdf, 82 kB)||Application Notes|
|CN0155: Precision Weigh Scale Design Using a 24-Bit Sigma-Delta ADC with Internal PGA and AC Excitation (pdf, 238 kB)||Circuit Note|
|Tutorial on Technical and Performance Benefits of AD719x Family (pdf, 4889 kB)||Tutorials|
|UG-257: Evaluation Board for the AD7195, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC (pdf, 1275 kB)||User Guides|
|MS-2210: Designing Power Supplies for High Speed ADC (pdf, 327 kB)||Technical Articles|
|Analog-to-Digital Converter and Driver ICs||Solutions Bulletins||HTML|
|FAQs for the AD719x family.||FAQs/RAQs||HTML|
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
|Title||Content Type||File Type|
|AD7190 - Microcontroller No-OS Driver||Device Drivers||HTML|
|AD7192 IIO High Precision ADC Linux Driver (Wiki Site)||Device Drivers||HTML|
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.