The AD688 is a high precision ±10 V tracking reference. Low tracking error, low initial error, and low temperature drift give the AD688 reference absolute ±10 V accuracy performance previously unavailable in monolithic form. The AD688 uses a proprietary ion-implanted buried Zener diode, and laser wafer drift trimming of high stability thin-film resistors to provide outstanding performance. The AD688 includes the basic reference cell and three additional amplifiers. The amplifiers are laser-trimmed for low offset and low drift.
The AD688 is a high precision ±10 V tracking reference designed for applications requiring 12-bit absolute accuracy. It utilizes a proprietary ion-implanted buried Zener diode and laser-trimmed thin-film resistors to achieve low initial error and low temperature drift. The device includes three additional amplifiers configured to allow Kelvin connections, enabling it to drive long lines or high current loads while maintaining accuracy.
| Tracking Error | 1.5 mV |
|---|---|
| Initial Error | 2.0 mV |
| Temperature Drift | 1.5 ppm/°C |
| Output Noise | 6 μV p-p |
| Temperature Range | -40°C to +85°C |
The tracking error is less than 1.5 mV.
Connect an external 1 µF capacitor to the Noise Reduction pin (Pin 7) to ground.
It is offered in wide body 16-lead SOIC and 16-lead CERDIP packages.