Alternative Parts

  • AD7175-8
    AD7175-8

    Better Noise Performance, fastest Throughput, True Rail to Rail Buffers and Precision Reference. Enhanced Feature Set.

  • AD7172-4
    AD7172-4

    Lower Power and Lower Noise, faster Throughput, true Rail to Rail Buffers. Enhanced feature set.

  • AD7173-8
    AD7173-8

    Lower Power and Lower Noise, faster Throughput. Integrated Buffers and precision reference. Enhanced feature set.

Overview

Features and Benefits

  • Fast settling filter option
  • 8 differential/16 pseudo differential input channels
  • RMS noise: 11 nV at 4.7 Hz (gain = 128)
  • 15.5 noise-free bits at 2.4 kHz (gain = 128)
  • Up to 22 noise-free bits (gain = 1)
  • Offset drift: ±5 nV/°C
  • Gain drift: ±1 ppm/°C
  • 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
  • 4 general-purpose digital outputs
  • Power supply
    • AVDD: 3 V to 5.25 V
    • DVDD: 2.7 V to 5.25 V
  • Current: 4.65 mA
  • Temperature range: −40°C to +105°C
  • Package: 32-lead LFCSP
  • Interface
    • 3-wire serial
    • SPI, QSPI™, MICROWIRE, and DSP compatible
    • Schmitt trigger on SCLK

Product Details

The AD7194 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 interface directly to the ADC.

The device can be configured to have eight differential inputs or sixteen pseudo differential inputs. 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 a very flexible digital filter, including a fast settling option. Variables such as output data rate and settling time are dependent on the option selected. For applications that require all conversions to be settled, the AD7194 includes zero latency.

The part operates with a power supply from 3 V to 5.25 V. It consumes a current of 4.65 mA, and it is housed in a 32-lead LFCSP package.

Applications

  • PLC/DCS analog input modules
  • Data acquisition
  • Strain gage transducers
  • Pressure measurement
  • Temperature measurement
  • Flow measurement
  • Weigh scales
  • Chromatography
  • Medical and scientific instrumentation

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

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.

VirtualEval

Design Tools

AD7193/AD7194 Digital Filter Models

These tools show the response of the digital filter section of the AD71xx and AD77xx devices based on input parameters.

Product Recommendations

AD7194 Companion Parts

Recommended Digital Isolators

Recommended Driver Amplifier

  • For a low noise, low distortion, rail-to-rail output, differential driver: ADA4940-1.
  • For a precision, general purpose, rail-to-rail, single-ended input: AD8628.

Recommended Precision Reference

  • For low noise, high accuracy, 2.5V reference: ADR421, ADR431.
  • For low noise, high accuracy, 5V reference: ADR425.

Recommended Linear Regulators

  • For powering the separate AVdd and DVdd supplies: ADP3303.

Design Resources

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.

PCN-PDN Information

Discussions

AD7194 Discussions

RE: interfacing multiple ad7194
8 week(s) ago in Precision ADCs
RE: Ad7194 over voltage at input
8 week(s) ago in Precision ADCs
RE: Recommended update over AD7194
8 week(s) ago in Precision ADCs
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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.


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Evaluation Boards Pricing displayed is based on 1-piece.
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.