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ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

電子工程師 ? 作者:工程師陳翠 ? 2018-06-16 06:56 ? 次閱讀

ADI公司的ADAQ7980/ADAQ7988是16位模數轉換器ADC) μModule? 數據采集系統,集成了四個常見信號處理和調理模塊,采用支持各種應用的系統級封裝(SiP)設計。內置一個高精度低功耗16位SAR ADC,一個低功耗高帶寬高輸入阻抗ADC驅動器,一個穩定的低功耗基準電壓緩沖器和一個高效的電源管理模塊,可簡化數據采集系統的設計過程。主要用在自動測試設備(ATE),電池供電儀器儀表,通信,數據采集,過程控制和醫療儀器。本文介紹了ADAQ7980主要特性,框圖,以及評估板EVAL-ADAQ7980SDZ主要特性,簡化框圖,電路圖,材料清單和PCB設計圖。

The ADAQ7980/ADAQ7988 are 16-bit analog-to-digital converter (ADC) μModule? data acquisition systems that integrate four common signal processing and conditioning blocks into a system in package (SiP) design that supports a variety of applications. These devices contain the most critical passive components, eliminating many of the design challenges associated with traditional signal chains that use successive approximation register (SAR) ADCs. These passive components are crucial to achieving the specified device performance.

The ADAQ7980/ADAQ7988 contain a high accuracy, low power, 16-bit SAR ADC, a low power, high bandwidth, high input impedance ADC driver, a low power, stable reference buffer, and an efficient power management block. Housed within a tiny, 5 mm × 4 mm LGA package, these products simplify the design process for data acquisition systems. The level of system integration of the ADAQ7980/ADAQ7988 solves many design challenges, while the devices still provide the flexibility of a configurable ADC driver feedback loop to allow gain and/or common-mode adjustments.A set of four device supplies provides optimal system performance; however,single-supply operation is possible with minimal impact on device operating specifications. The ADAQ7980/ADAQ7988 integrate within a compact, integrated circuit (IC)-like form factor key components commonly used in data acquisition signal chain designs. The μModule family transfers the design burden of component selection,optimization, and layout from designer to device, shortening overall design time, system troubleshooting, and ultimately improving time to market. The serial peripheral interface (SPI)-compatible serial interface features the ability to daisy-chain multiple devices on a single, 3- wire bus and provides an optional busy indicator. The user interface is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic. Specified operation of these devices is from ?55℃ to +125℃。

ADAQ7980主要特性:

Easy to use

μModule data acquisition system

All active components designed by Analog Devices, Inc.

50% PCB area savings

Includes critical passive components

SPI-/QSPI-/MICROWIRE?-/DSP-compatible serial interface

Daisy-chain multiple ADAQ7980/ADAQ7988 devices

Versatile supply configuration with 1.8 V/2.5 V/3 V/5 V logic interface

High performance

16-bit resolution with no missing codes

Throughput: 1 MSPS (ADAQ7980) and 500 kSPS (ADAQ7988)

INL: ±8 ppm typical and 20 ppm maximum

SNR: 91.5 dB typical at 10 kHz (unity gain)

THD: ?105 dB at 10 kHz Zero error: ±0.06 mV typical (unity gain)

Zero error temperature drift: 1.3 μV/°C maximum

Low power dissipation

21 mW typical at 1 MSPS (ADAQ7980)

16.5 mW typical at 500 kSPS (ADAQ7988)

Flexible power-down modes

Small, 24-lead, 5 mm × 4 mm LGA package

Excellent ESD ratings

3500 V human body model (HBM)

1250 V field-induced charged device model (FICDM)

Wide operating temperature range: ?55℃ to +125℃

ADAQ7980應用:

Automated test equipment (ATE)

Battery powered instrumentation

Communications

Data acquisition

Process control

Medical instruments

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖1.ADAQ7980功能框圖

評估板EVAL-ADAQ7980SDZ

The EVAL-ADAQ7980SDZ is an evaluation board designed to demonstrate the low power ADAQ7980 performance and provide an easy to understand interface for a variety of system applications. The ADAQ7980 is a 16-bit, 1 MSPS, μModule data acquisition system that integrates four common signal processing and conditioning blocks into a system in package (SiP) design that supports a variety of applications.

The EVAL-ADAQ7980SDZ can also evaluate the ADAQ7988, despite being populated with the ADAQ7980. To mimic the evaluation of the ADAQ7988 performance, limit the maximum sample rate of the ADAQ7980 to 500 kSPS in the ADAQ798x Evaluation Software.

The evaluation board is ideal for use with the Analog Devices, Inc., system demonstration platform (SDP) board, EVAL-SDP-CB1Z. The EVAL-ADAQ7980SDZ interfaces to the SDP board via a 120-pin connector. P1, P2, P3, and P4 SMA connectors are provided to connect a low noise analog signal source.

The ADAQ798x Evaluation Software executable controls the evaluation board over the USB through the EVAL-SDP-CB1Z. See the Related Links section for a list of on-board components.

A full description and complete specifications for the ADAQ7980 are provided in the ADAQ7980/ADAQ7988 data sheet and must be consulted in conjunction with this user guide when using the evaluation board. Full details on the EVAL-SDP-CB1Z are available on the SDP-B product page.

評估板EVAL-ADAQ7980SDZ主要特性:

Full featured evaluation board for the ADAQ7980

Versatile analog signal conditioning circuitry

On-board reference, reference buffers, and ADC drivers

SDP board-compatible (EVAL-SDP-CB1Z)

PC software for control and data analysis of time and frequency domain

評估板EVAL-ADAQ7980SDZ包括:

EVAL-ADAQ7980SDZ evaluation board

Wall power supply 9 V dc adapter

Daughter card power connector

Nylon screws

圖2.評估板EVAL-ADAQ7980SDZ外形圖

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖3.評估板EVAL-ADAQ7980SDZ簡化框圖

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖4.評估板EVAL-ADAQ7980SDZ電路圖(1)

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖5.評估板EVAL-ADAQ7980SDZ電路圖(2)

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖6.評估板EVAL-ADAQ7980SDZ電路圖(3)

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖7.評估板EVAL-ADAQ7980SDZ電路圖(4)

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖8.評估板EVAL-ADAQ7980SDZ電路圖(5)

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖9.評估板EVAL-ADAQ7980SDZ PCB設計圖:頂層絲印-裝配

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖10.評估板EVAL-ADAQ7980SDZ PCB設計圖:頂層

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖11.評估板EVAL-ADAQ7980SDZ PCB設計圖:層層疊2-地

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖12.評估板EVAL-ADAQ7980SDZ PCB設計圖:層3-電源

ADI ADAQ7980 16位ADC μModule 數據采集系統解決方案

圖13.評估板EVAL-ADAQ7980SDZ PCB設計圖:底層

聲明:本文內容及配圖由入駐作者撰寫或者入駐合作網站授權轉載。文章觀點僅代表作者本人,不代表電子發燒友網立場。文章及其配圖僅供工程師學習之用,如有內容侵權或者其他違規問題,請聯系本站處理。 舉報投訴
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