Overview
Features and Benefits
- High performance
- True differential analog input voltage range: ±VREF
- 0 V to VREF with VREF between 2.4 V and 5.1 V
- Throughput: 500 kSPS/100 kSPS options
- Zero latency architecture
- 18-bit resolution with no missing codes
- INL: ±1 LSB typical, ±2 LSB maximum
- Dynamic range: 99 dB at VREF = 5 V
- SNR: 98 dB at fIN = 1 kHz, VREF = 5 V
- THD: −119 dB at fIN = 1 kHz, VREF = 5 V
- SINAD: 97 dB at fIN = 1 kHz, VREF = 5 V
- True differential analog input voltage range: ±VREF
- Low power dissipation
- Single-supply 2.5 V operation with 1.8 V, 2.5 V, 3 V, and 5 V logic interface
- 2 mW at 500 kSPS (VDD only)
3.5 mW at 500 kSPS (total) - 70 μW at 10 kSPS
- Proprietary serial interface SPI-/QSPI™-/MICROWIRE™-/DSP-compatible
- 10-lead MSOP and 3 mm × 3 mm 10-Lead LFCSP
- Wide operating temperature range: −40°C to +85°C
Product Details
The AD7989-1/AD7989-5 are 18-bit, successive approximation, analog-to-digital converters (ADCs) that operate from a single power supply, VDD. The AD7989-1/AD7989-5 contain a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7989-1/AD7989-5 sample the voltage difference between the IN+ and IN− pins. The voltages on these pins typically swing in opposite phases between 0 V and VREF. The reference voltage, VREF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.
The AD7989-1/AD7989-5 are serial peripheral interface (SPI)-compatible, which features the ability, using the SDI/CS input, to daisy-chain several ADCs on a single 3-wire bus. The AD7989-1/AD7989-5 are compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.
The AD7989-1/AD7989-5 are available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C.
Applications
- Automated test equipment
- Data acquisition systems
- Medical instruments
- Machine automation
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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AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0)2/14/2015PDF363 kB
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AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. C)2/14/2015PDF427 K
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AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)2/14/2015PDF299 kB
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MT-002: What the Nyquist Criterion Means to Your Sampled Data System Design2/14/2015PDF152 kB
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MT-074: Differential Drivers for Precision ADCs2/14/2015PDF249 kB
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MT-031: Grounding Data Converters and Solving the Mystery of "AGND" and "DGND"3/20/2009PDF144 kB
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MT-001: Taking the Mystery out of the Infamous Formula, "SNR=6.02N + 1.76dB", and Why You Should Care3/4/2009PDF94 kB
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SAR ADC & Driver Quick-Match Guide9/13/2013PDF251 kB
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CN-0237: Ultralow Power, 18-Bit, Differential PulSAR ADC Driver6/5/2012PDF463 kB
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CN-0180: Precision Single-Supply Differential ADC Driver for Industrial-Level Signals11/16/2010PDF388 kB
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MS-2124: Understanding AC Behaviors of High Speed ADCs3/20/2018PDF276 kB
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Protecting ADC Inputs4/1/2017
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Exploring Different SAR ADC Analog Input Architectures1/1/2016
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Designing Power Supplies for High Speed ADC2/1/2012
Product Recommendations
AD7989-5 Companion Parts
Recommended Digital Isolators
- For SPI Interface, lowest power, 2.5 kVrms isolation: ADUM1401.
- For SPI Interface, low power, 5.0 kVrms isolation: ADUM4401.
- 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.
Recommended External Voltage References
Recommended Driver Amplifiers
- For precision, low power, low distortion applications: ADA4841-1, ADA4940-1, ADA4941-1.
- For low frequency, precision, low bias current applications: ADA4627-1, ADA4610-2, AD8476.
- For high frequency, low noise, low distortion applications: ADA4897-1, AD8021.
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
Support & Discussions
AD7989-5 Discussions
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.