AD7175-8
24-Bit, 8-/16-Channel, 250 kSPS, Sigma-Delta ADC with True Rail-to-Rail Buffers
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Overview
Features and Benefits
- Fast and flexible output rate: 5 SPS to 250 kSPS
- Performance specifications
17.2 noise free bits at 250 kSPS
20.2 noise free bits at 2.5 kSPS
24 noise free bits at 20 SPS
INL: ±1 ppm of FSR - 85 dB filter rejection of 50 Hz and 60 Hz with 50 ms settling
- 85 dB filter rejection of 50 Hz and 60 Hz with 50 ms settling
- User configurable input channels
8 fully differential channels or 16 single-ended channels
Crosspoint multiplexer
- Channel scan data rate of 50 kSPS/channel (20 ìs settling)
- On-chip 2.5 V reference (±2 ppm/°C drift)
- True rail-to-rail analog and reference input buffers
- Internal or external clock
- Power supply: AVDD1 − AVSS = 5 V, AVDD2 = IOVDD = 2 V to 5 V (nominal)
Split supply with AVDD1/AVSS at ±2.5 V - ADC current: 8.4 mA
- Temperature range: −40°C to +105°C 3- or 4-wire serial digital interface (Schmitt trigger on SCLK) Serial port interface (SPI), QSPI, MICROWIRE, and DSP compatible
Product Details
The AD7175-8 is a low noise, fast settling, multiplexed, 8-/16- channel (fully/pseudo differential) Σ-Δ analog-to-digital converter (ADC) for low bandwidth inputs. It has a maximum channel scan rate of 50 kSPS (20 ìs) for fully settled data. The output data rates range from 5 SPS to 250 kSPS.
The AD7175-8 integrates key analog and digital signal condition-ing blocks to allow users to configure an individual setup for each analog input channel in use. Each feature can be user selected on a per channel basis. Integrated true rail-to-rail buffers on the analog inputs and external reference inputs provide easy to drive high impedance inputs. The precision 2.5 V low drift (2 ppm/°C) band gap internal reference (with output reference buffer) adds embedded functionality to reduce external component count.
The digital filter allows simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate. The user can switch between different filter options according to the demands of each channel in the application. The ADC automatically switches through each selected channel. Further digital processing functions include offset and gain calibration registers, configurable on a per channel basis.
The device operates with a 5 V AVDD1 . AVSS supply, or with ±2.5 V AVDD1/AVSS, and 2.5 V to 5 V AVDD2 and IOVDD supplies. The specified operating temperature range is .40°C to +105°C. The AD7175-8 is available in a 40-lead LFCSP package.
APPLICATIONS
- Process control: PLC/DCS modules
Temperature and pressure measurement - Medical and scientific multichannel instrumentation
- Chromatography
Product Categories
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)
Documentation & Resources
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AD717x Family2/25/2016
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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 -
AD7175 Family Precision Sigma Delta ADCs (w/o audio)10/15/2018
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Sigma-Delta ADC Clocking—More Than Jitter4/1/2019 Analog Dialogue
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Fundamental Principles Behind the Sigma-Delta ADC Topology: Part 22/1/2016
Software & Systems Requirements
Evaluation Software
Mbed Support
EVAL-AD717x-AD411x-IIO Code
IIO firmware for the AD717x and AD411x family of devices.
WIKI
AD717x/411x Mbed IIO Application
This page gives an overview of using the ARM “Mbed” platform supported firmware example with Analog Devices AD717x/AD411x Evaluation boards and SDP-K1 controller board.
WIKI
Learn how to get started with Mbed
Mbed is an open source, development environment for ARM microcontrollers.
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.
IBIS Models
IBS
AD7175-8 IBIS Model
513.67 K
Reference Designs (1)
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.
Sample & Buy
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Evaluation Boards
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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.