Features and Benefits
- High performance
- Pseudo differential analog input range
- 0 V to VREF with VREF between 2.5 V to 5 V
- Throughput: 1 MSPS
- Zero latency architecture
- 16-bit resolution with no missing codes
- INL: ±0.6 LSB typical, ±1.25 LSB maximum
- Dynamic range: 92 dB, VREF = 5 V
- SNR: 91.5 dB at fIN = 10 kHz, VREF = 5 V
- THD: −114 dB at fIN = 10 kHz, VREF = 5 V
- SINAD: 91 dB at fIN = 10 kHz, VREF = 5 V
- Low power dissipation
- Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
- 4 mW at 1 MSPS (VDD only)
- 7 mW at 1 MSPS (total)
- 70 μW at 10 kSPS
- Proprietary serial interface
- SPI/QSPI/MICROWIRE™/DSP compatible
- Daisy-chain multiple ADCs and busy indicator
- 10-lead MSOP, 10-lead, 3 mm × 3 mm LFCSP
- Wide operating temperature range: −40°C to +125°C
- Download AD7980-EP data sheet (pdf)
- Controlled manufacturing baseline
- One assembly/test site
- One fabrication site
- Enhanced product change notification
- Qualification data available on request
- Military temperature range: −55°C to +125°C
- V62/12640 DSCC Drawing Number
Product DetailsThe AD7980 is a 16-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN−. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.
The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single, 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO.
The AD7980 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +125°C.APPLICATIONS
- Automated test equipment
- Data acquisition systems
- Medical instruments
- Machine automation
Markets and Technologies
Product Lifecycle 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 (2)
The PMOD-compatible evaluation/prototyping board is a small form factor, low-cost analog-to-digital conversion option. When prototyping, this board is used in conjunction with your favorite MCU or FPGA development board which has the SPI PMOD peripheral connector. Direct electrical and physical connection will enable you to quickly develop software for your system.
This board can also be operated as an evaluation board using the System Demonstration Platform (EVAL-SDP-CB1Z) and an adaptor board (SDP-PMD-IB1Z). When operated with the System Demonstration Platform, a LabView software GUI is provided enabling the user to perform analysis of the ADC's performance.
The EVAL-AD7980SDZ is a fully featured evaluation kit for the AD7980. 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.
Documentation & Resources
SAR ADC & Driver Quick-Match Guide9/13/2013
Explaining SAR ADC Power Specifications3/20/2018
Protecting ADC Inputs4/1/2017
Practical Filter Design Challenges and Considerations for Precision ADCs4/1/2016 Analog Dialogue
Powering a Precision SAR ADC Using a High Efficiency, Ultralow Power Switcher in Power Sensitive Applications3/1/2016
Exploring Different SAR ADC Analog Input Architectures1/1/2016
Introduction to Dynamic Power Scaling1/1/2016
Explaining SAR ADC Power Specifications4/1/2015
High Performance Electrocardiogram (ECG) Signal Conditioning1/8/2015
Design Reliable Digital Interfaces for Successive-Approximation ADCs1/1/2015 Analog Dialogue
Voltage Reference Design for Precision Successive-Approximation ADCs6/1/2013 Analog Dialogue
Front-End Amplifier and RC Filter Design for a Precision SAR Analog-to-Digital Converter12/1/2012 Analog Dialogue
Designing Power Supplies for High Speed ADC2/1/2012
Software & Systems Requirements
Tools & Simulations
Precision ADC Driver Tool
The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input
AD7980 Companion Parts
Recommended Digital Isolators
- For SPI Interface, enhanced system-level ESD performance, 2.5 kVrms isolation: ADUM3401.
- For SPI Interface, smallest package, low voltage I/O (1.8 V to 5.5 V): ADUM3481.
- For SPI Interface, low power, 5.0 kVrms isolation: ADUM4401.
- For SPI Interface, lowest power, 2.5 kVrms isolation: ADUM1401.
Recommended External Voltage References
Recommended Driver Amplifiers
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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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.