Features and Benefits
- Low Power Dissipation: 285 mW
- Single +5 V Supply
- Integral Nonlinearity Error: 2.5 LSB
- Differential Nonlinearity Error: 0.6 LSB
- Input Referred Noise: 0.36 LSB
- On-Chip Sample-and-Hold Amplifier and Voltage Reference
- Signal-to-Noise and Distortion
- Ratio: 77.5 dB
- Spurious-Free Dynamic Range: 90 dB
- Out-of-Range Indicator
- Straight Binary Output Data
- 44-Lead MQFP
The AD9240 is a 10 MSPS, single supply, 14-bit analog-to- digital converter (ADC). It combines a low cost, high speed CMOS process and a novel architecture to achieve the resolution and speed of existing hybrid implementations at a fraction of the power consumption and cost. It is a complete, monolithic ADC with an on-chip, high performance, low noise sample-and-hold amplifier and programmable voltage reference. An external reference can also be chosen to suit the dc accuracy and temperature drift requirements of the application. The device uses a multistage differential pipelined architecture with digital output error correction logic to guarantee no missing codes over the full operating temperature range.
The input of the AD9240 is highly flexible, allowing for easy interfacing to imaging, communications, medical and data-acquisition systems. A truly differential input structure allows for both single-ended and differential input interfaces of varying input spans. The sample-and-hold amplifier (SHA) is equally suited for multiplexed systems that switch full-scale voltage levels in successive channels as well as sampling single-channel inputs at frequencies up to and beyond the Nyquist rate. The AD9240 also performs well in communication systems employing Direct-IF Down Conversion, since the SHA in the differential input mode can achieve excellent dynamic performance well beyond its specified Nyquist frequency of 5 MHz.
A single clock input is used to control all internal conversion cycles. The digital output data is presented in straight binary output format. An out-of-range (OTR) signal indicates an overflow condition which can be used with the most significant bit to determine low or high overflow.
The AD9240 offers a complete single-chip sampling 14-bit, analog-to-digital conversion function in a 44-lead Metric Quad Flatpack.
- Low Power and Single Supply
The AD9240 consumes only 280 mW on a single +5 V power supply.
- Excellent DC Performance Over Temperature
The AD9240 provides no missing codes, and excellent temperature drift performance over the full operating temperature range.
- Excellent AC Performance and Low Noise
The AD9240 provides nearly 13 ENOB performance and has an input referred noise of 0.36 LSB rms.
- Flexible Analog Input Range
The versatile onboard sample-and-hold (SHA) can be configured for either single ended or differential inputs of varying input spans.
- Flexible Digital Outputs
The digital outputs can be configured to interface with +3 V and +5 V CMOS logic families.
- Excellent Undersampling Performance
The full power bandwidth and dynamic range of the AD9240 make it well suited for Direct-IF Down Conversion extending to 45 MHz.
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.
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)5/12/2015
AN-501: Aperture Uncertainty and ADC System Performance (Rev. A)2/14/2015
AN-282: Fundamentals of Sampled Data Systems2/14/2015
AN-756: Sampled Systems and the Effects of Clock Phase Noise and Jitter (Rev. 0)2/14/2015
AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0)2/14/2015
AN-345: Grounding for Low-and-High-Frequency Circuits2/14/2015
AN-737: How ADIsimADC Models an ADC (Rev. B)11/9/2007
AN-715: A First Approach to IBIS Models: What They Are and How They Are Generated (Rev. 0)12/14/2004
AN-741: Little Known Characteristics of Phase Noise (Rev. 0)11/29/2004
Digital X-Ray Technology Improves Patient Experience and Physician Diagnostics11/28/2014
Designing Power Supplies for High Speed ADC2/1/2012
Correlating High-Speed ADC Performance to Multicarrier 3G Requirements6/1/2003
DNL and Some of its Effects on Converter Performance6/1/2001
Analog-to-Digital Converter Architectures and Choices for System Design9/1/1999 Analog Dialogue
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.
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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