Overview
The AD676AD, produced by Analog Devices Inc., is a multipurpose 16-bit parallel output analog-to-digital converter (ADC). It utilizes a switched-capacitor/charge redistribution architecture to achieve a high conversion rate of 100 kSPS, with a total conversion time of 10 µs. The device is optimized for performance through on-chip autocalibration, which corrects internal nonlinearities. The AD676AD is segmented into two monolithic chips: a digital control chip fabricated on Analog Devices' DSP CMOS process and an analog ADC chip fabricated on their BiMOS II process, both contained in a single package.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits |
| Conversion Rate | 100 kSPS |
| Total Conversion Time | 10 µs |
| Supply Voltages | +5 V and ±12 V |
| Power Consumption | Typically 360 mW during conversion |
| Operating Temperature Range | -40°C to 85°C |
| Architecture | Switched-capacitor/charge redistribution |
| Autocalibration | On-chip autocalibration with microcontroller and calibration DAC |
Key Features
- High conversion rate of 100 kSPS with 10 µs total conversion time.
- On-chip autocalibration eliminates the need for user trims or adjustments, ensuring high performance.
- Utilizes a capacitor-array, charge redistribution technique to minimize temperature-induced mismatches.
- Includes a sample/hold function without the need for additional external circuitry.
- Microcontroller controls successive approximation algorithm, autocalibration routine, sample/hold operation, and internal output data latch.
- Specified for both AC (S/(N+D) Ratio, THD, IMD) and DC parameters, making it suitable for signal processing and measurement applications.
Applications
- Signal processing applications requiring high accuracy and speed.
- Measurement applications where precise DC parameters are crucial.
- Industrial control systems that need reliable and accurate data conversion.
- Medical devices requiring high-resolution analog-to-digital conversion.
- Aerospace and defense systems where precision and reliability are paramount.
Q & A
- What is the resolution of the AD676AD?
The AD676AD has a resolution of 16 bits.
- What is the conversion rate of the AD676AD?
The conversion rate of the AD676AD is 100 kSPS.
- How does the AD676AD achieve high performance?
The AD676AD achieves high performance through on-chip autocalibration, which corrects internal nonlinearities.
- What is the power consumption of the AD676AD during conversion?
The power consumption of the AD676AD is typically 360 mW during conversion.
- What are the supply voltages for the AD676AD?
The AD676AD operates from +5 V and ±12 V supplies.
- Does the AD676AD require external sample/hold circuitry?
No, the AD676AD includes a sample/hold function without the need for additional external circuitry.
- What is the operating temperature range of the AD676AD?
The operating temperature range of the AD676AD is -40°C to 85°C.
- What architecture does the AD676AD use for analog-to-digital conversion?
The AD676AD uses a switched-capacitor/charge redistribution architecture.
- How does the autocalibration process work in the AD676AD?
The autocalibration process in the AD676AD involves measuring and compensating for capacitor mismatch errors using an on-chip microcontroller and calibration DAC.
- What types of applications is the AD676AD suitable for?
The AD676AD is suitable for signal processing, measurement, industrial control, medical devices, and aerospace and defense applications.
