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
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).
- 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.
- 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 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)
This page contains evaluation board documentation and ordering information for evaluating the AD9245.
Documentation & Resources
AN-905: VisualAnalog™ Converter Evaluation Tool Version 1.0 User Manual8/18/2020
AN-835: Understanding High Speed ADC Testing and Evaluation (Rev. B)5/12/2015985 kB
AN-501: Aperture Uncertainty and ADC System Performance (Rev. A)2/14/2015227 K
AN-282: Fundamentals of Sampled Data Systems2/14/20152131 kB
AN-756: Sampled Systems and the Effects of Clock Phase Noise and Jitter (Rev. 0)2/14/2015291K
AN-827: A Resonant Approach to Interfacing Amplifiers to Switched-Capacitor ADCs (Rev. 0)2/14/2015203 kB
AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0)2/14/2015363 kB
AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. C)2/14/2015427 K
AN-345: Grounding for Low-and-High-Frequency Circuits2/14/2015455 kB
AN-1142: Techniques for High Speed ADC PCB Layout (Rev. 0)2/2/2012392 kB
AN-737: How ADIsimADC Models an ADC (Rev. B)11/9/2007373 kB
AN-807: Multicarrier WCDMA Feasibility (Rev. 0)11/9/2007969 kB
AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0)11/9/20071535 kB
AN-803: Pin Compatible High Speed ADCs Simplify Design Tasks (Rev. 0)11/29/2006356 kB
AN-715: A First Approach to IBIS Models: What They Are and How They Are Generated (Rev. 0)12/14/2004370K
AN-741: Little Known Characteristics of Phase Noise (Rev. 0)11/29/20041679 kB
Designing Power Supplies for High Speed ADC2/1/2012
Matching An ADC To A Transformer7/13/2007
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
Buffer Adapts Single-ended Signals for Differential Inputs2/1/2004
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.
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.
AD9245 IBIS Models
AD9245 IBIS Models
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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