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AD7274BUJ-REEL Datenblatt(PDF) 1 Page - Analog Devices |
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AD7274BUJ-REEL Datenblatt(HTML) 1 Page - Analog Devices |
1 / 20 page a REV. PrB ( 6/04) Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.Trademarks and registered tradermarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 Analog Devices, Inc., 200 4 3MSPS,10-/12-Bit ADCs in 8-Lead TSOT Preliminary Technical Data AD7273/AD7274 PRELIMINARYTECHNICALDATA FUNCTIONAL BLOCK DIAGRAM FEATURES Fast Throughput Rate: 3MSPS Specified for VDD of 2.35 V to 3.6V Low Power: 13.5 mW max at 3MSPS with 3V Supplies Wide Input Bandwidth: 70dB SNR at 1MHz Input Frequency Flexible Power/Serial Clock Speed Management No Pipeline Delays High Speed Serial Interface SPITM/QSPITM/MICROWIRETM/DSP Compatible Power Down Mode: 1µA max 8-Lead TSOT Package 8-Lead MSOP Package APPLICATIONS Battery-Powered Systems Personal Digital Assistants Medical Instruments Mobile Communications Instrumentation and Control Systems Data Acquisition Systems High-Speed Modems Optical Sensors PRODUCT HIGHLIGHTS 1. 3MSPS ADCs in an 8-lead TSOT package. 2. High Throughput with Low Power Consumption. 3. Flexible Power/Serial Clock Speed Management. The conversion rate is determined by the serial clock allowing the conversion time to be reduced through the serial clock speed increase. This allows the average power consumption to be reduced when a power-down mode is used while not converting. The AD7273/ AD7274 features a power down mode to maximize power efficiency at lower throughput rates. Current con- sumption is 1 µA max when in Power Down mode. 4. Reference can be driven up to the power supply. 5. No Pipeline Delay. The parts feature a standard successive-approximation ADC with accurate control of the sampling instant via a CS input and once-off conversion control. GENERAL DESCRIPTION The AD7273/AD7274 are 10-bit and 12-bit, high speed, low power, successive-approximation ADCs respectively. The parts operate from a single 2.35V to 3.6 V power supply and feature throughput rates up to 3 MSPS. The parts contain a low-noise, wide bandwidth track/hold am- plifier which can handle input frequencies in excess of TBD MHz. The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is also initiated at this point. The conversion rate is deter- mined by the SCLK. There are no pipeline delays associ- ated with the part. The AD7273/AD7274 use advanced design techniques to achieve very low power dissipation at high throughput rates. The reference for the parts is applied externally and can be in the range of 1.2V to VDD. This allows the widest dynamic input range to the ADC. T/H SCLK SDATA &6 GND 10-/12-BIT SUCCESSIVE APPROXIMATION ADC CONTROL LOGIC V DD V IN AD7273/AD7274 V REF GND |
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