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AD9022 Arkusz danych(PDF) 1 Page - Analog Devices |
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AD9022 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 12 page AD9022 REV. A One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 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. 12-Bit 20 MSPS Monolithic A/D Converter PRODUCT DESCRIPTION The AD9022 is a high speed, high performance, monolithic 12- bit analog-to-digital converter. All necessary functions, includ- ing track-and-hold (T/H) and reference, are included on chip to provide a complete conversion solution. It is a companion unit to the AD9023; the primary difference between the two is that all logic for the AD9022 is TTL compatible, while the AD9023 utilizes ECL logic for digital inputs and outputs. Pinouts for the two parts are nearly identical. Operating from +5 V and –5.2 V supplies, the AD9022 pro- vides excellent dynamic performance. Sampling at 20 Msps with AIN = 1 MHz, the spurious-free dynamic range (SFDR) is typi- cally 76 dB; with AIN = 9.6 MHz, SFDR is 74 dB. SNR is typi- cally 65 dB. The on-board T/H has a 110 MHz bandwidth and, more impor- tantly, is designed to provide excellent dynamic performance for analog input frequencies above Nyquist. This feature is neces- sary in many under-sampling signal processing applications, such as in direct IF-to-digital conversion. To maintain dynamic performance at higher IFs, monolithic RF track-and-holds (such as the AD9100 and AD9101 Samplifier™) can be used with the AD9022 to process signals up to and beyond 70 MHz. Samplifier is a trademark of Analog Devices, Inc. With DNL typically less than 0.5 LSB and 20 ns transient re- sponse settling time, the AD9022 provides excellent results when low-frequency analog inputs must be oversampled (such as CCD digitization). The full scale analog input is ±1 V with a 300 Ω input impedance. The analog input can be driven directly from the signal source, or can be buffered by the AD96xx series of low noise, low distortion buffer amplifiers. All timing is internal to the AD9022; the clock signal initiates the conversion cycle. For best results, the encode command should contain as little jitter as possible. High speed layout prac- tices must be followed to ensure optimum A/D performance. The AD9022 is built on a trench isolated bipolar process and utilizes an innovative multipass architecture (see the block diagram). The unit is packaged in 28-pin ceramic DIPs and gullwing surface mount packages. The AD9022 is specified to operate over the industrial (–25 °C to +85°C) and military (–55 °C to +125°C) temperature ranges. FUNCTIONAL BLOCK DIAGRAM 4-BIT ADC DAC DAC 5-BIT ADC DIGITAL ERROR CORRECTION 5-BIT ADC 12 8 TTL T/H +2V REF GND +5V –5.2V ENCODE ANALOG INPUT T/H 16 FEATURES Monolithic 12-Bit 20 MSPS A/D Converter Low Power Dissipation: 1.4 Watts On-Chip T/H and Reference High Spurious-Free Dynamic Range TTL Logic APPLICATIONS Radar Receivers Digital Communications Digital Instrumentation Electro-Optics OBSOLETE |
Podobny numer części - AD9022_15 |
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Podobny opis - AD9022_15 |
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