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AD9241AS Datenblatt(PDF) 1 Page - Analog Devices |
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AD9241AS Datenblatt(HTML) 1 Page - Analog Devices |
1 / 25 page REV. 0 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 Complete 14-Bit, 1.25 MSPS Monolithic A/D Converter AD9241 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997 FUNCTIONAL BLOCK DIAGRAM VINA CAPT CAPB SENSE OTR BIT 1 (MSB) BIT 14 (LSB) VREF DVSS AVSS AD9241 SHA DIGITAL CORRECTION LOGIC OUTPUT BUFFERS VINB 1V REFCOM 5 5 4 4 4 4 4 14 DVDD AVDD CLK MODE SELECT MDAC3 GAIN = 8 MDAC2 GAIN = 8 MDAC1 GAIN = 16 A/D A/D A/D A/D DRVDD DRVSS CML FEATURES Monolithic 14-Bit, 1.25 MSPS A/D Converter Low Power Dissipation: 60 mW Single +5 V Supply Integral Nonlinearity Error: 2.5 LSB Differential Nonlinearity Error: 0.6 LSB Input Referred Noise: 0.36 LSB Complete: On-Chip Sample-and-Hold Amplifier and Voltage Reference Signal-to-Noise and Distortion Ratio: 78.0 dB Spurious-Free Dynamic Range: 88.0 dB Out-of-Range Indicator Straight Binary Output Data 44-Pin MQFP PRODUCT HIGHLIGHTS The AD9241 offers a complete single-chip sampling 14-bit, analog-to-digital conversion function in a 44-pin Metric Quad Flatpack. Low Power and Single Supply The AD9241 consumes only 60 mW on a single +5 V power supply. Excellent DC Performance Over Temperature The AD9241 provides no missing codes, and excellent tempera- ture drift performance over the full operating temperature range. Excellent AC Performance and Low Noise The AD9241 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. PRODUCT DESCRIPTION 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 refer- ence 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 correc- tion 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 employ- ing Direct-IF Down Conversion since the SHA in the differen- tial 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 over- flow condition which can be used with the most significant bit to determine low or high overflow. |
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