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AD781SQ Datasheet(PDF) 1 Page - Analog Devices |
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AD781SQ Datasheet(HTML) 1 Page - Analog Devices |
1 / 8 page FUNCTIONAL BLOCK DIAGRAM 1 2 3 45 6 7 8 AD781 X1 VCC IN COMMON NC OUT S/H NC VEE 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 Complete 700 ns Sample-and-Hold Amplifier AD781* One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 PRODUCT DESCRIPTION The AD781 is a high speed monolithic sample-and-hold amplifier (SHA). The AD781 guarantees a maximum acquisition time of 700 ns to 0.01% over temperature. The AD781 is specified and tested for hold mode total harmonic distortion and hold mode signal-to-noise and distortion. The AD781 is configured as a unity gain amplifier and uses a self-correcting architecture that minimizes hold mode errors and insures accuracy over temperature. The AD781 is self-contained and requires no external components or adjustments. The low power dissipation, 8-pin mini-DIP package and completeness make the AD781 ideal for highly compact board layouts. The AD781 will acquire a full-scale input in less than 700 ns and retain the held value with a droop rate of 0.01 µV/µs. Excellent linearity and hold mode dc and dynamic performance make the AD781 ideal for 12- and 14-bit high speed analog- to-digital converters. The AD781 is manufactured on Analog Devices’ BiMOS process which merges high performance, low noise bipolar circuitry with low power CMOS to provide an accurate, high speed, low power SHA. The AD781 is specified for three temperature ranges. The J grade device is specified for operation from 0 °C to +70°C, the A grade from –40 °C to +85°C and the S grade from –55°C to +125 °C. The J and A grades are available in 8-pin plastic DIP packages. The S grade is available in an 8-pin cerdip package. *Protected by U.S. Patent No. 4,962,325. PRODUCT HIGHLIGHTS 1. Fast acquisition time (700 ns), low aperture jitter (75 ps) and fully specified hold mode distortion make the AD781 an ideal SHA for sampling systems. 2. Low droop (0.01 µV/µs) and internally compensated hold mode error results in superior system accuracy. 3. Low power (95 mW typical), complete functionality and small size make the AD781 an ideal choice for a variety of high performance, low power applications. 4. The AD781 requires no external components or adjustments. 5. Excellent choice as a front-end SHA for high speed analog- to-digital converters such as the AD671, AD7586, AD674B, AD774B, AD7572 and AD7672. 6. Fully specified and tested hold mode distortion guarantees the performance of the SHA in sampled data systems. 7. The AD781 is available in versions compliant with MIL- STD-883. Refer to the Analog Devices Military Products Databook or current AD781/883B data sheet for detailed specifications. FEATURES Acquisition Time to 0.01%: 700 ns Maximum Low Power Dissipation: 95 mW Low Droop Rate: 0.01 V/ s Fully Specified and Tested Hold Mode Distortion Total Harmonic Distortion: –80 dB Maximum Aperture Jitter: 75 ps Maximum Internal Hold Capacitor Self-Correcting Architecture 8-Pin Mini Cerdip and Plastic Package MIL-STD-883 Compliant Versions Available |
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