Alternative Parts

  • AD7172-2
    AD7172-2

    Lower Power, true rail to rail analog input buffers, up to 30kSPS throughput rate.

  • AD7175-2
    AD7175-2

    Integrated Rail to Rail input buffers on the analog inputs.

  • AD7177-2
    AD7177-2

    Lowest noise 32-bit resolution true Rail to Rail Buffers. Enhanced feature set.

Overview

Features and Benefits

  • Fast and flexible output rate—5 SPS to 250 kSPS
  • Fast settling time—20 µs
  • Channel scan data rate of 50 kSPS/channel
  • Performance specifications
    • 17 noise free bits at 250 kSPS
    • 20 noise free bits at 2.5 kSPS
    • 22 noise free bits at 5 SPS
    • INL ±2.5 ppm of FSR
  • 85 dB rejection of 50 Hz and 60 Hz with 50 ms settling
  • User-configurable input channels
    • 2 fully differential or 4 pseudo differential
    • Crosspoint multiplexer
  • On-chip 2.5 V reference (drift 2 ppm/°C)
  • Internal oscillator, external crystal, or external clock
  • See data sheet fo additional features

Product Details

The AD7176-2 is a fast settling, highly accurate, high resolution, multiplexed Σ-Δ analog-to-digital converter (ADC) for low bandwidth input signals. Its inputs can be configured as two fully differential or four pseudo differential inputs via the integrated crosspoint multiplexer. An integrated precision, 2.5 V, low drift (2 ppm/°C), band gap internal reference (with an output reference buffer) adds functionality and reduces the external component count.

The maximum channel scan data rate is 50 kSPS/channel (settling time of 20 µs), resulting in fully settled data with 17 noise free bits. User-selectable output data rates range from 5 SPS to 250 kSPS. The resolution increases at lower speeds.

The AD7176-2 offers three key digital filters. The fast settling sinc5 + sinc1 filter maximizes the channel scan rate. The sinc3 filter maximizes the resolution for single-channel, low speed applications. For 50 Hz and 60 Hz environments, the AD7176-2 specific filter minimizes the settling times or maximizes the rejection of the line frequency. These enhanced filters enable simultaneous 50 Hz and 60 Hz rejection with a 27 SPS output data rate (with a settling time of 36 ms).

System offset and gain errors can be corrected on a per channel basis. This per channel configurability extends to the output data rate used for each channel when using a sinc5 + sinc1 filter. All switching of the crosspoint multiplexer is controlled by the ADC and can be configured to automatically control an external multiplexer via the GPIO pins.

The specified operating temperature range is −40°C to +105°C. The AD7176-2 is housed in a 24-lead TSSOP package.

Applications

  • Process control: PLC/DCS modules
    - Temperature and pressure measurement
  • Medical and scientific multichannel instrumentation
  • Chromatography

Product Lifecycle icon-recommended 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)

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

Reference Designs (3)

Product Recommendations

AD7176-2 Companion Parts

Recommended Digital Isolators

  • For SPI Interface, enhanced system-level ESD performance, 2.5 kVrms isolation: ADUM3401.
  • For SPI Interface, low power, 5.0 kVrms isolation: ADUM4401.
  • For SPI Interface, lowest power, 2.5 kVrms isolation: ADUM1401.
  • For SPI Interface, smallest package, low voltage I/O (1.8 V to 5.5 V): ADUM3481.

Recommended Driver Amplifiers

  • For a single supply, attenuating input stage, differential driver: AD8475.
  • For a single supply, low noise, low distortion, differential driver: ADA4940-1.
  • For a single supply, low noise, low offset CMOS amplifier: AD8656.

Recommended External Multiplexers

  • For low Ron with four differential inputs: ADG1409.
  • For low Ron, 4:1 channel multiplexer: ADG1404.

Recommended External Voltage References

  • For the family of low noise, low drift and high accuracy references: ADR445, ADR4550.

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

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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.