Lower Power and Lower Noise, faster Throughput, true Rail to Rail Buffers and Precision Reference. Enhanced feature set.
Better Noise Performance, fastest Throughput, true Rail to Rail Buffers and Precision Reference. Enhanced feature set.
Lowest noise, 32-bit resolution, true Rail to Rail Buffers. Enhanced feature set.
Features and Benefits
- AC or DC sensor excitation
- RMS noise: 8.5 nV at 4.7 Hz (gain = 128)
- 16 noise-free bits at 2.4 kHz (gain = 128)
- Up to 22.5 noise-free bits (gain = 1)
- Offset drift: 5 nV/°C
- Gain drift: 1 ppm/°C
- Specified drift over time
- 2 differential/4 pseudo differential input channels
- Automatic channel sequencer
- Programmable gain (1 to 128)
- Output data rate: 4.7 Hz to 4.8 kHz
- Internal or external clock
- Simultaneous 50 Hz/60 Hz rejection
- Power supply
- AVDD: 4.75 V to 5.25 V
- DVDD: 2.7 V to 5.25 V
- Current: 6 mA
- Temperature range: –40°C to +105°C
- Package: 32-lead LFCSP
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 rejection. 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.
- Weigh scales
- Strain gage transducers
- Pressure measurement
- Temperature measurement
- PLC/DCS analog input modules
- Data acquisition
- Medical and scientific instrumentation
Markets and Technologies
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
The EVAL-AD7195EBZ is a fully featured evaluation Board for the AD7195. The evaluation board can be operated in standalone mode ( either battery-powered or with external power supply) or connected to a PC via a standard USB interface. When operated with a PC, software is provided enabling the user to perform detailed analysis of the ADC's performance.
Please note: This Evaluation software does not run on Windows 8 or Windows 10 (USB driver is non-compliant with OS >Windows 7).
Documentation & Resources
AN-1131: Chopping on the AD7190, AD7192, AD7193, AD7194, and AD7195 (Rev. 0)2/14/2015
AN-1264: Precision Signal Conditioning for High Resolution Industrial Applications (Rev. 0)2/14/2015
AN-1084: Channel Switching: AD7190, AD7192, AD7193, AD7194, AD7195 (Rev. 0)10/12/2010
AN-1069: Zero Latency for the AD7190, AD7192, AD7193, AD7194, and AD7195 (Rev. 0)4/4/2010
Digital Filters Sinc3 V's Sinc4 Differences and Trade Offs11/28/2018
Precision Sigma Delta Filtering Tutorial10/15/2018
Virtual Evaluation (VE) Tutorial10/15/2018
Understanding and Eliminating 1/f Noise5/1/2017 Analog Dialogue
Tools & Simulations
Virtual Eval - BETA
Virtual Eval is a web application to assist designers in product evaluation of ADCs, DACs, and other ADI products. Using detailed models on Analog’s servers, Virtual Eval simulates crucial part performance characteristics within seconds. Configure operating conditions such as input tones and external jitter, as well as device features like gain or digital down-conversion. Performance characteristics include noise, distortion, and resolution, FFTs, timing diagrams, response plots, and more.
AD7195 Companion Parts
Recommended Precision Driver Amplifiers
- For higher supply voltages up to +-8V: AD8639.
- For low noise and low power applications: ADA4051-2.
- For more precision and great temperature dirft specs: AD8539.
Recommended Precision References
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.