Overview
Features and Benefits
- Single 3 V supply operation (2.7 V to 3.6 V)
- Low power
366 mW at 80 MSPS
300 mW at 65 MSPS
165 mW at 40 MSPS
90 mW at 20 MSPS
- SNR = 72.7 dBc to Nyquist at 80 MSPS
- SFDR = 83.0 dBc to Nyquist at 80 MSPS
- Differential input with 500 MHz bandwidth
- On-chip reference and sample-and-hold
- DNL = ±0.5 LSB at 80 MSPS
- See datasheet for additional features
Product Details
The AD9245 is a monolithic, single 3 V supply, 14-bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS analog-to-digital (ADC) converter featuring a high performance sample-and-hold amplifier (SHA) and voltage reference. The AD9245 uses a multistage differential pipelined architecture with output error correction logic to provide 14-bit accuracy and guarantee no missing codes over the full operating temperature range.
The wide bandwidth, truly differential SHA allows a variety of user-selectable input ranges and common modes, including single-ended applications. It is suitable for multiplexed systems that switch full-scale voltage levels in successive channels and for sampling single-channel inputs at frequencies well beyond the Nyquist rate. Combined with power and cost savings over previously available analog-to-digital converters, the AD9245 is suitable for applications in communications, imaging, and medical ultrasound.
A single-ended clock input is used to control all internal con-version cycles. A duty cycle stabilizer (DCS) compensates for wide variations in the clock duty cycle while maintaining excellent overall ADC performance. The digital output data is presented in straight binary or twos complement formats. An out-of-range (OTR) signal indicates an overflow condition that can be used with the most significant bit to determine low or high overflow. Fabricated on an advanced CMOS process, the AD9245 is available in a 32-lead LFCSP and is specified over the industrial temperature range (–40°C to +85°C).
PRODUCT HIGHLIGHTS
- The AD9245 operates from a single 3 V power supply and features a separate digital output driver supply to accommodate 2.5 V and 3.3 V logic families.
- The patented SHA input maintains excellent performance for input frequencies up to 100 MHz and can be configured for single-ended or differential operation.
- The AD9245 is pin-compatible with the AD9215, AD9235, and AD9236. This allows a simplified migration from 10 bits to 14 bits and 20 MSPS to 80 MSPS.
- The clock DCS maintains overall ADC performance over a wide range of clock pulse widths.
- The OTR output bit indicates when the signal is beyond the selected input range.
APPLICATIONS
- Medical imaging equipment
- IF sampling in communications receivers
WCDMA, CDMA-One, CDMA-2000, and TDS-CDMA - Battery-powered instruments
- Hand-held scopemeters
- Spectrum analyzers
- Power-sensitive military applications
Product Categories
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 (1)
Documentation & Resources
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AN-905: VisualAnalog™ Converter Evaluation Tool Version 1.0 User Manual8/18/2020
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AN-835: Understanding High Speed ADC Testing and Evaluation (Rev. B)5/12/2015PDF985 kB
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AN-501: Aperture Uncertainty and ADC System Performance (Rev. A)2/14/2015PDF227 K
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AN-282: Fundamentals of Sampled Data Systems2/14/2015PDF2131 kB
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AN-756: Sampled Systems and the Effects of Clock Phase Noise and Jitter (Rev. 0)2/14/2015PDF291K
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AN-827: A Resonant Approach to Interfacing Amplifiers to Switched-Capacitor ADCs (Rev. 0)2/14/2015PDF203 kB
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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-345: Grounding for Low-and-High-Frequency Circuits2/14/2015PDF455 kB
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AN-1142: Techniques for High Speed ADC PCB Layout (Rev. 0)2/2/2012PDF392 kB
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AN-737: How ADIsimADC Models an ADC (Rev. B)11/9/2007PDF373 kB
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AN-807: Multicarrier WCDMA Feasibility (Rev. 0)11/9/2007PDF969 kB
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AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0)11/9/2007PDF1535 kB
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AN-803: Pin Compatible High Speed ADCs Simplify Design Tasks (Rev. 0)11/29/2006PDF356 kB
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AN-715: A First Approach to IBIS Models: What They Are and How They Are Generated (Rev. 0)12/14/2004PDF370K
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AN-741: Little Known Characteristics of Phase Noise (Rev. 0)11/29/2004PDF1679 kB
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Designing Power Supplies for High Speed ADC2/1/2012
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Matching An ADC To A Transformer7/13/2007
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Ask The Application Engineer—36: Wideband A/D Converter Front-End Design Considerations II: Amplifier-or Transformer Drive for the ADC?2/1/2007 Analog Dialogue
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Buffer Adapts Single-ended Signals for Differential Inputs2/1/2004
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Correlating High-Speed ADC Performance to Multicarrier 3G Requirements6/1/2003
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.
MathWorks®
Design Tools
Visual Analog
For designers who are selecting or evaluating high speed ADCs, VisualAnalog™ is a software package that combines a powerful set of simulation and data analysis tools with a user-friendly graphical interface.
IBIS Models
AD9245 IBIS Models
AD9245 IBIS Models
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.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD9245BCPZ-20 | Material Declaration | Reliability Data | 32-Lead LFCSP (5mm x 5mm w/ EP) | |
| AD9245BCPZ-40 | Material Declaration | Reliability Data | 32-Lead LFCSP (5mm x 5mm w/ EP) | |
| AD9245BCPZ-65 | Material Declaration | Reliability Data | 32-Lead LFCSP (5mm x 5mm w/ EP) | |
| AD9245BCPZ-80 | Material Declaration | Reliability Data | 32-Lead LFCSP (5mm x 5mm w/ EP) | |
| AD9245BCPZRL7-20 | Material Declaration | Reliability Data | 32-Lead LFCSP (5mm x 5mm w/ EP) | |
| AD9245BCPZRL7-40 | Material Declaration | Reliability Data | 32-Lead LFCSP (5mm x 5mm w/ EP) | |
| AD9245BCPZRL7-65 | Material Declaration | Reliability Data | 32-Lead LFCSP (5mm x 5mm w/ EP) | |
| AD9245BCPZRL7-80 | Material Declaration | Reliability Data | 32-Lead LFCSP (5mm x 5mm w/ EP) | |
| Wafer Fabrication Data |
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Sample & Buy
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