AD717x

Designed for a Wide Variety of Applications

The AD717x family offer a complete integrated Sigma-Delta ADC solution which can be used in high precision, low noise single channel applications (Life Science measurements) or higher speed multiplexed applications (Factory Automation PLC Input modules). The Sigma-Delta ADC is intended primarily for measurement of signals close to DC but also delivers outstanding performance with input bandwidths out to ~10kHz.

Обзор семейства AD717x

AD717x Performance

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The AD717x family offers performance (noise and speed of conversion) selection options and with the added flexibility and functionality to select from a variety of channel counts, it makes the AD717x family an ideal platform for your next generation of high precision and density designs.

The Core ADC

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The AD7175x core ADC has established new standards in both the speed and noise performance. A maximum output data rate of 250 kSPS (this is 20us¦50 kSPS per channel muxed) is achieved, while delivering greater than 24 noise free bits in the sub 1kHz output data rate (32-bit: AD7177-2 ADC). These performance metrics are achieved in a power efficient manner with other family members offering a pin-pin and software compatible path to lower power as desired.

Integrated Analog Blocks

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The degree of signal chain integration on the AD717x family reduces the challenge for the system designer and greatly simplifies design. The inclusion of true rail to rail analog input buffers eliminate the need for time consuming and difficult external component selection and evaluation.  The AD717x rail to rail buffers maximize the input range in any applications and allow the ADC to measure all the way to both rails without degradation in linearity or accuracy. As both the input stage and the full ADC path is chopped the 1/f noise of the measurement path is reduced allowing higher sensitivity for measuring signals at or close to DC.

Integrated Digital Blocks

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Integrated digital blocks allow platform designs be re-purposed easily to suit particular measurement need. The highly configurable digital filter enables tuning of settling times, bandwidth and rejection of specific interferers. The cross point multiplexer combined with intelligent and per channel configurable sequencer creates the sense that you are deploying/employing an ADC per channel. The degree of functionality integrated in the AD717x family makes implementing both on-chip and system diagnostics easier, while the improved robust SPI port including CRC error detection results in higher confidence and fidelity between the ADC and  uC / DSP / CPU when using any member of the AD717x family.

Extensive Toolset and Collateral Available

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Designing with the AD717x family is helped by the extensive toolset and collateral available. Eval+ is our next generation customer evaluation software which provides an all in one download enabling a virtual evaluation via embedded functional model before moving to silicon evaluation with a fully featured customer evaluation board.  All generics come with a fully featured customer evaluation board with options for analog preconditioning prototyping i.e. amplifiers, reference, a full power solution. There are multiple connectivity options for evaluating with the SDP-B controller board or alternatively as in standalone operation connecting to your existing digital host module or alternatively to the latest evaluation kits for microcontrollers, DSP or PMOD connector controllers.

Application specific CFTLs with availability can kick start your system level developments reducing risk, and give you a less expensive prototyping route.

No-OS example C-code drivers ease translation from our device datasheets into firmware configuration, control and data readback.

VIDEO – EVAL+: ADC Performance & Functional Evaluation Without Hardware

AD7175-2 EVAL+ Software – a single software platform enabling configuration, analysis and ADC selection for use with and without evaluation hardware.

View Evaluation Kits

New Tool – Virtual Eval Tool - BETA

Evaluate ADCs and DACs by quickly simulating crucial part performance characteristics. Find the family by entering AD717 in the tool's Product Search field.

Launch Tool

Предлагаемые продукты

Особенности и преимущества

Fast and Flexible Output Rate: 5 SPS to 250 kSPS

Channel Scan Data Rate of 50 kSPS/Channel (20 µs Settling)

Performance Specifications

  • 17.2 Noise free bits @ 250 kSPS
  • 20 Noise free bits @ 2.5 kSPS
  • 24 Noise free bits@ 20SPS
  • INL: ±1 ppm of FSR

85 dB Rejection of 50 Hz and 60 Hz with 50 ms Settling

User Configurable Input Channels

  • 2 Fully differential channels or 4 single-ended channels
  • Crosspoint multiplexer

On-Chip 2.5 V Reference (±2 ppm/°C Drift)

True Rail-to-Rail Analog and Reference Input Buffers

Оценочные комплекты

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EVAL-AD7177-2 Принципиальная схема

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The EVAL-AD7177-2SDZ evaluation kit features the AD7177-2, a 32-bit, 10 kSPS analog-to-digital converter (ADC) with integrated rail-to rail-analog input buffers, on-board power supply regulation, and an external amplifier section for amplifier evaluation. A 7 V to 9 V ac-to-dc adapter is regulated to 5 V and 3.3 V, which supply the AD7177-2 and support components. 

The EVAL-AD7177-2SDZ evaluation board connectsto the USB port of a PC via the EVAL-SDP-CB1Z SDP controller board.

The AD7177-2 evaluation software fully configures the AD7177-2 device functionality via a user accessible register interface and provides dc time domain analysis in the form of waveform graphs, histograms, and associated noise analysis for ADC performance evaluation.

Full specifications for the AD7177-2 are available in the product data sheet, which should be consulted in conjunction with this user guide UG-849 when using the evaluation board.

EVAL-AD7172-4 Принципиальная схема

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The EVAL-AD7172-4SDZ evaluation kit features the AD7172-4, a 24-bit, 31.25 kSPS analog-to-digital converter (ADC) with integrated rail-to-rail analog input buffers, on-board power supply regulation, and an external amplifier section for amplifier evaluation. A 7 V to 9 V ac to dc adapter is regulated to 5 V and 3.3 V; this voltage supplies the AD7172-4 and support compo-nents. The EVAL-AD7172-4SDZ connects to a USB port via the SDP on the EVAL-SDP-CB1Z controller board.

The EVAL-AD7172-4SDZ evaluation software fully configures the AD7172-4 device functionality via a user accessible register interface and provides dc time domain analysis in the form of waveform graphs, histograms, and associated noise analysis for ADC performance evaluation.

EVAL-AD7173-8SDZ Принципиальная схема

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The EVAL-AD7173-8SDZ is a fully featured evaluation kit for the AD7173-8. This board operates in stand alone mode or in conjunction with the System Development Platform, EVAL-SDP-CB1Z . When operated with the System Development Platform software is provided enabling the user to perform detailed analysis of the ADC's performance. This software includes the technical note describing the operation and set up of the evaluation board in standalone operation or when operated with the System Development Platform . When operated in standalone mode the ADZS-BRKOUT-EX3 break out board is recommended for access to various control pins. The SDP Controller board is a separate list item in the ordering guide below (EVAL-SDP-CB1Z). If you have not previously purchased an SDP Controller board, please do so to ensure a full evaluation setup.

EVAL-AD7176-2 Принципиальная схема

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The EVAL-AD7176-2SDZ is a fully featured evaluation kit for the AD7176-2. This board operates in stand alone mode or in conjunction with the System Development Platform, EVAL-SDP-CB1Z . When operated with the System Development Platform software is provided enabling the user to perform detailed analysis of the ADC's performance. This software includes the technical note describing the operation and set up of the evaluation board in standalone operation or when operated with the System Development Platform . When operated in standalone mode the ADZS-BRKOUT-EX3 break out board is recommended for access to various control pins.


The SDP Controller board is a separate list item in the ordering guide below (EVAL-SDP-CB1Z). If you have not previously purchased an SDP Controller board, please do so to ensure a full evaluation setup.

EVAL-AD7175-8 Принципиальная схема

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Оценочная плата EVAL-AD7175-8SDZ содержит 24-разрядный АЦП AD7175-8 с интегрированными буферами на аналоговых входах и быстродействием 250 kSPS, схему стабилизации напряжения питания и интерфейс с внешним усилителем для оценивания характеристик АЦП при работе с различными усилителями. Постоянное выходное напряжение сетевого адаптера в диапазоне от 7 В до 9 В преобразовывается схемой стабилизации в напряжения 5 В и 3,3 В, используемые для питания AD7175-8 и вспомогательных компонентов. Данная оценочная плата подключается к порту USB посредством платы контроллера демонстрационной платформы SDP-B (EVAL-SDP-CB1Z).

Оценочное программное обеспечение для AD7175-8 позволяет конфигурировать все функции AD7175-8 через доступный пользователю интерфейс работы с регистрами, производить анализ во временной области с выводом графиков и гистограмм, а также анализировать уровень шума для оценки характеристик АЦП.

Техническое описание AD7175-8, которое содержит подробную информацию о компоненте, следует принимать во внимание совместно с руководством пользователя UG-901 при работе с этой оценочной платой. Детали работы платы контроллера SDP-B доступны на сайте Analog Devices.

EVAL-AD7175-2 Принципиальная схема

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EVAL-AD7175-2SDZ – это полнофункциональная оценочная плата для AD7175-2. Данная плата работает как в автономном режиме, так и совместно с демонстрационной платформой (SDP) EVAL-SDP-CB1Z. При работе с демонстрационной платформой предоставляемое программное обеспечение (ПО) позволяет пользователю детально проанализировать характеристики АЦП. Данное ПО включает в себя технические заметки, описывающие настройку и работу оценочной платы как в автономном режиме, так и при работе с демонстрационной платформой. При работе в автономном режиме рекомендуется применять плату ADZS-BRKOUT-EX3 для доступа к различным выводам управления.

Плата контроллера SDP – это отдельный компонент в перечне заказа ниже (EVAL-SDP-CB1Z). Если плата контроллера SDP ранее не заказывалась, то её необходимо приобрести для обеспечения полноты оценки.

EVAL-AD7172-2 Принципиальная схема

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Оценочный комплект EVAL-AD7172-2SDZ содержит малопотребляющий 24-разрядный Σ-Δ аналого-цифровой преобразователь (АЦП) AD7172-2 с rail-to-rail буферами, обладающий быстродействием 31.25 kSPS, схему стабилизации напряжения питания и интерфейс с внешним усилителем для оценивания характеристик АЦП при работе с различными усилителями. Постоянное выходное напряжение сетевого адаптера в диапазоне от 7 В до 9 В преобразовывается схемой стабилизации в напряжения 5 В и 3.3 В, используемые для питания AD7172-2 и вспомогательных компонентов. EVAL-AD7172-2SDZ подключается к порту USB через платформу SDP на плате контроллера (EVAL-SDP-CB1Z).

Оценочное программное обеспечение, поставляемое EVAL-AD7172-2SDZ, позволяет конфигурировать все функции AD7172-2 через доступный пользователю регистровый интерфейс и производить анализ во временной области с выводом графиков и гистограмм, а также анализ шума для оценки характеристик АЦП.

Техническое описание AD7172-2 содержит подробную информацию о компоненте, которой следует руководствоваться при использовании EVAL-AD7172-2SDZ.

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