The AD5881 represents a significant advancement in the field of advanced single-chip voltage references. The device features low initial error and low temperature drift, resulting in unprecedented single-chip absolute accuracy performance. It utilizes a proprietary ion-implanted Zener diode and laser wafer drift adjustment for highly stable thin-film resistors, allowing it to deliver excellent performance.
The AD588 has a built-in base reference and three additional amplifiers that provide a pin-programmable output range. These amplifiers are laser-tuned with low offset and low drift characteristics to maintain the accuracy of the reference source. The amplifier configuration allows for Kelvin connections with loads and/or boosters to drive long lines or high-current loads, providing all the AD588 accuracy required for the application circuit.
The AD588's low initial error makes it suitable for use as a system reference for precision measurement applications requiring 12-bit absolute accuracy. In such a system, the AD588 can provide a known voltage for system calibration through software, and the low drift feature compensates for drift from other devices in the system. As a result, manual system calibration is eliminated and the cost of regular recalibration is eliminated. In addition, the AD588 can be used in conjunction with automatic calibration software to eliminate mechanical instability and improper calibration of the adjustment potentiometer.
The AD588 is available in seven models. The AD588JQ and AD588KQ are available in a 16-pin CERDIP package and are rated for an operating temperature range of 0°C to +70°C. The AD588AQ and AD588BQ are available in a 16-pin CERDIP package and the AD588ARWZ are available in a 16-pin SOIC package, both rated for an operating temperature range of −25°C to +85°C industrial temperatures. Ceramic packages are rated for AD588TE and AD588TQ over a full military/aerospace temperature range.
Product Focus
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AD588提供12位绝对精度，无需用户进行任何调整。它还提供可选的精密调整连接，适合要求更高精度的应用。精密调整不会改变齐纳二极管或缓冲放大器的工作条件，因此不会增加温度漂移。
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AD588的输出噪声非常低，典型值为6 μV p-p。同时提供一个降噪引脚，以利用外部电容进一步对噪声进行滤波。
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该器件提供带开尔文输出连接的±5 V精密跟踪模式，无需外部元件。跟踪误差小于1 mV，要求+5 V输出与−5 V输出精确对称的应用可以使用精密调整功能。
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通过引脚绑定功能可以配置各种输出：±5 V、+5 V、+10 V、−5 V、−10 V双路输出，或者+5 V、−5 V、+10 V、−10 V单路输出。
1 Protected by U.S. Patent No. 4,644,253.