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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD9225ARS датащи(PDF) 1 Page - Analog Devices |
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AD9225ARS датащи(HTML) 1 Page - Analog Devices |
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1 / 24 page  REV. A 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. a AD9225 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., 1998 Complete 12-Bit, 25 MSPS Monolithic A/D Converter FUNCTIONAL BLOCK DIAGRAM VINA CAPT CAPB SENSE OTR BIT 1 (MSB) BIT 12 (LSB) VREF DRVSS AVSS CML AD9225 SHA DIGITAL CORRECTION LOGIC OUTPUT BUFFERS VINB 1V REFCOM 5 5 3 3 3 3 4 12 DRVDD AVDD CLK MODE SELECT MDAC3 GAIN = 4 MDAC2 GAIN = 4 MDAC1 GAIN = 16 A/D A/D A/D A/D FEATURES Monolithic 12-Bit, 25 MSPS A/D Converter Low Power Dissipation: 280 mW Single +5 V Supply No Missing Codes Guaranteed Differential Nonlinearity Error: 0.4 LSB Complete On-Chip Sample-and-Hold Amplifier and Voltage Reference Signal-to-Noise and Distortion Ratio: 71 dB Spurious-Free Dynamic Range: –85 dB Out-of-Range Indicator Straight Binary Output Data 28-Lead SOIC 28-Lead SSOP Compatible with 3 V Logic PRODUCT DESCRIPTION The AD9225 is a monolithic, single supply, 12-bit, 25 MSPS, analog-to-digital converter with an on-chip, high performance sample-and-hold amplifier and voltage reference. The AD9225 uses a multistage differential pipelined architecture with output error correction logic to provide 12-bit accuracy at 25 MSPS data rates, and guarantees no missing codes over the full operat- ing temperature range. The AD9225 combines a low cost high speed CMOS process and a novel architecture to achieve the resolution and speed of existing bipolar implementations at a fraction of the power consumption and cost. The input of the AD9225 allows for easy interfacing to both imaging and communications systems. With a truly differential input structure, the user can select a variety of input ranges and offsets including single-ended applications. The dynamic perfor- mance is excellent. The sample-and-hold (SHA) amplifier is well suited for both multiplexed systems that switch full-scale voltage levels in suc- cessive channels and sampling single-channel inputs at frequen- cies up to and well beyond the Nyquist rate. The AD9225’s wideband input combined with the power and cost savings over previously available monolithics, is suitable for applications in communications, imaging and medical ultrasound. The AD9225 has an onboard programmable reference. An external reference can also be chosen to suit the dc accuracy and temperature drift requirements of the application. 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 signal indicates an overflow condition that can be used with the most significant bit to deter- mine low or high overflow. PRODUCT HIGHLIGHTS The AD9225 is fabricated on a very cost effective CMOS process. High-speed precision analog circuits are now combined with high density logic circuits. The AD9225 offers a complete single-chip sampling 12-bit, 25 MSPS analog-to-digital conversion function in 28-lead SOIC and SSOP packages. Low Power—The AD9225 at 280 mW consumes a fraction of the power of presently available in existing monolithic solutions. On-Board Sample-and-Hold (SHA)—The versatile SHA input can be configured for either single-ended or differential inputs. Out of Range (OTR)—The OTR output bit indicates when the input signal is beyond the AD9225’s input range. Single Supply—The AD9225 uses a single +5 V power supply simplifying system power supply design. It also features a sepa- rate digital driven supply line to accommodate 3 V and 5 V logic families. Pin Compatibility—The AD9225 is pin compatible with the AD9220, AD9221, AD9223 and AD9224 ADCs. |
Аналогичный номер детали - AD9225ARS |
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Аналогичное описание - AD9225ARS |
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