AD781 Analog Devices, AD781 Datasheet
AD781
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AD781 Summary of contents
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... Low droop (0. 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 ...
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... L AD781S Max Min Typ Max 700 600 700 600 500 600 4 1 –15 –35 –25 – 500 250 500 1 0.01 1 –86 +3 –4 –1 ...
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... C 1 Model +300 C 195 mW AD781JN AD781AN – +85 C AD781SQ – +125 C NOTES 1 For details on grade and package offerings screened in accordance with MIL-STD-883, refer to the Analog Devices Military Products Databook or current AD781/883B data sheet Plastic DIP Cerdip. –3– ...
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... AD781 V– 100 1k 10k 100k 1M FREQUENCY – Hz Power Supply Rejection Ratio vs. Frequency 200 150 100 50 0 –50 –100 –150 –200 –10 – INPUT VOLTAGE – V Bias Current vs. Input Voltage 10.0 1.0 0.1 0.01 0.001 100 TEMPERATURE – C Droop Rate vs ...
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... Both input and output are treated as a single-ended signal, referred to common. The AD781 utilizes a proprietary circuit design which includes a self-correcting architecture. This sample-and-hold circuit corrects for internal errors after the hold command has been given, by compensating for amplifier gain and offset errors, and charge injection errors ...
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... The nominal hold mode offset is specified for input condition. Over the input range of – the AD781 is also characterized for an effective gain error and nonlinearity of the held value, as shown in Figure 3. As indicated by the AD781 specifications, the hold mode offset is very stable over temperature ...
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... FREQUENCY – Hz Figure 5. RMS Noise vs. Input Bandwidth of ADC DRIVING THE ANALOG INPUTS For best performance important to drive the AD781 analog input from a low impedance signal source. This enhances the sampling accuracy by minimizing the analog and digital crosstalk. Signals which come from higher impedance sources (e ...
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... ADC. The time between the AD674 status line going high and the actual start of conversion allows the AD781 to settle to 0.01 result, the AD674 status line can be used to control the AD781; only an inverter is needed to interface the two devices. 7404 ...