The AD9241 is a 1.25 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 AD9241 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 both 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. Also, the AD9241 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 0.625 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.
For sample availability and additional technical support, please e-mail the High-Speed Converter Group and supply your name, company, mailing address, telephone/fax numbers, and email address, and a brief description of your application.
|Title||Content Type||File Type|
|AD9241: Complete 14-Bit, 1.25 MSPS Monolithic A/D Converter Data Sheet (Rev 0, 04/1997) (pdf, 495 kB)||Data Sheets|
|AN-282: Fundamentals of Sampled Data Systems (pdf, 2131 kB)||Application Notes|
|AN-737: How ADIsimADC Models an ADC (pdf, 373 kB)||Application Notes|
|AN-905: VisualAnalog Converter Evaluation Tool Version 1.0 User Manual (pdf, 2124 kB)||Application Notes|
|AN-935: Designing an ADC Transformer-Coupled Front End (pdf, 363 kB)||Application Notes|
|AN-835: Understanding High Speed ADC Testing and Evaluation (pdf, 985 kB)||Application Notes|
|AN-715: A First Approach to IBIS Models: What They Are and How They Are Generated (pdf, 370 kB)||Application Notes|
AN-345: Grounding for Low-and-High-Frequency Circuits
(pdf, 455 kB)
Know Your Ground and Signal Paths for Effective Designs. Current Flow Seeks Path of Least Impedance-Not Just Resistance....
|AN-756: Sampled Systems and the Effects of Clock Phase Noise and Jitter (pdf, 291 kB)||Application Notes|
AN-501: Aperture Uncertainty and ADC System Performance
(pdf, 227 kB)
A Key Concern in IF Sampling is that of Aperture Uncertainty (Jitter)
|UG-173: High Speed ADC USB FIFO Evaluation Kit (HSC-ADC-EVALB-DCZ) (pdf, 774 kB)||User Guides|
14-Bit Monolithic ADCs: First to Sample Faster than 1 MSPS
(Analog Dialogue, Vol. 31, No. 2, 1997)
|MS-2210: Designing Power Supplies for High Speed ADC (pdf, 327 kB)||Technical Articles|
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.
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