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AD684JQ Datasheet(PDF) 1 Page - Analog Devices |
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AD684JQ Datasheet(HTML) 1 Page - Analog Devices |
1 / 8 page FUNCTIONAL BLOCK DIAGRAM 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 Four-Channel Sample-and-Hold Amplifier AD684* One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 FEATURES Four Matched Sample-and-Hold Amplifiers Independent Inputs, Outputs and Control Pins 500 ns Hold Mode Settling 1 s Maximum Acquisition Time to 0.01% Low Droop Rate: 0.01 V/ s Internal Hold Capacitors 75 ps Maximum Aperture Jitter Low Power Dissipation: 430 mW 0.3" Skinny DIP Package MIL-STD-883 Compliant Versions Available PRODUCT HIGHLIGHTS 1. Fast acquisition time (1 µs) and low aperture jitter (75 ps) make the AD684 the best choice for multiple channel data acquisition systems. 2. Monolithic construction insures excellent interchannel matching in terms of timing and accuracy, as well as high reliability. 3. Independent inputs, outputs and sample-and-hold controls allow user flexibility in system architecture. 4. Low droop (0.01 µV/µs) and internally compensated hold mode error results in superior system accuracy. 5. The AD684’s fast settling time and low output impedance make it ideal for driving high speed analog to digital converters such as the AD578, AD674, AD7572 and the AD7672. 6. The AD684 is available in versions compliant with MIL- STD-883. Refer to the Analog Devices Military Products Databook or current AD684/883B data sheet for detailed specifications. PRODUCT DESCRIPTION The AD684 is a monolithic quad sample-and-hold amplifier (SHA). It features four complete sampling channels, each controlled by an independent hold command. Each SHA is complete with an internal hold capacitor. The high accuracy SHA channels are self-contained and require no external components or adjustments. The AD684 is manufactured on a BiMOS process which provides a merger of high performance bipolar circuitry and low power CMOS logic. The AD684 is ideal for high performance, multichannel data acquisition systems. Each SHA channel can acquire a signal in less than 1 µs and retain the held value with a droop rate of less than 0.01 µV/µs. Excellent linearity and ac performance make the AD684 an ideal front end for high speed 12- and 14-bit ADCs. The AD684 has a self-correcting architecture that minimizes hold mode errors and insures accuracy over temperature. Each channel of the AD684 is capable of sourcing 5 mA and incorporates output short circuit protection. The AD684 is specified for three temperature ranges. The J grade device is specified for operation from 0 to +70 °C, the A grade from –40 °C to +85°C and the S grade from –55°C to +125 °C. *Protected by U.S. Patent Number 4,962,325. |
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