Overview
The AD688AQ, produced by Analog Devices Inc., is a high precision ±10 V tracking reference. It is designed to provide exceptional accuracy and stability, making it suitable for precision measurement applications. The device utilizes a proprietary ion-implanted buried Zener diode and laser-wafer-drift-trimmed high stability thin-film resistors to achieve outstanding performance. The AD688AQ includes a basic reference cell and three additional amplifiers, which are laser-trimmed for low offset and low drift, ensuring the maintenance of reference accuracy. This component is particularly useful in systems requiring 12-bit absolute accuracy, where it can serve as a system reference for calibration, eliminating the need for periodic recalibration.
Key Specifications
| Parameter | Value |
|---|---|
| Output Voltage | ±10 V |
| Initial Error | 5 mV (AD688AQ), 2 mV (AD688BQ) |
| Temperature Coefficient | 3 ppm/°C (AD688AQ and BQ), 8 ppm/°C (AD688ARWZ) |
| Temperature Range | -40°C to +85°C (AD688AQ and BQ), -40°C to +85°C (AD688ARWZ) |
| Package Options | 16-Lead CERDIP (AD688AQ and BQ), 16-Lead SOIC Wide (AD688ARWZ) |
| Tracking Error | |
| Output Noise |
Key Features
- Precision tracking ±10 V Kelvin output connections without external components.
- Low tracking error of less than 1.5 mV and optional fine-trim for exact symmetry between +10 V and -10 V outputs.
- High accuracy with 12-bit absolute accuracy without user adjustments.
- Low output noise, typically 6 μV p-p, with a pin for broadband noise filtering using an external capacitor.
- Laser-trimmed amplifiers for low offset and low drift, maintaining reference accuracy.
- Kelvin connections for driving long lines or high current loads.
Applications
The AD688AQ is ideal for precision measurement applications requiring high accuracy and stability. It is particularly useful in systems that need a reliable reference voltage for calibration, such as in test and measurement equipment, medical devices, and industrial control systems. The component can also be used in applications where periodic recalibration is undesirable or impractical.
Q & A
- What is the output voltage of the AD688AQ?
The output voltage of the AD688AQ is ±10 V. - What is the initial error of the AD688AQ?
The initial error of the AD688AQ is 5 mV. - What is the temperature coefficient of the AD688AQ?
The temperature coefficient of the AD688AQ is 3 ppm/°C. - What are the package options for the AD688AQ?
The AD688AQ is available in a 16-Lead CERDIP package. - What is the tracking error of the AD688AQ?
The tracking error of the AD688AQ is less than 1.5 mV. - How does the AD688AQ reduce output noise?
The AD688AQ reduces output noise with a typical noise level of 6 μV p-p and provides a pin for broadband noise filtering using an external capacitor. - What are the key applications of the AD688AQ?
The AD688AQ is used in precision measurement applications, test and measurement equipment, medical devices, and industrial control systems. - Can the AD688AQ be used for system calibration?
Yes, the AD688AQ can be used as a system reference for calibration, eliminating the need for periodic recalibration. - How does the AD688AQ maintain accuracy?
The AD688AQ maintains accuracy through laser-trimmed amplifiers with low offset and low drift. - What is the temperature range of the AD688AQ?
The temperature range of the AD688AQ is -40°C to +85°C.
