Key facts
- Brand
- Analog Devices
- Model
- AD7676
- Industry
- Industrial
- Documents
- 4
- Languages
- EN
- Last added
- 2012-08-03
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Analog Devices EE-247 Interfacing AD7676 ADCs to ADSP-21065L Processors Application Note
This document provides technical guidance on interfacing Analog Devices AD7676 analog-to-digital converters (ADCs) with ADSP-21065L SHARC processors. It specifically covers the configuration of the AD7676 in master serial mode with an internal discontinuous clock to supply data to the processor's serial port.
The note details the signal connections, timing requirements, and software implementation using assembly language. It includes example code for the ADSP-21065L to demonstrate how to program the Serial Port (SPORT) to receive 16-bit data from the ADC, handling the initial dummy reads required for the interface to function correctly.
Analog Devices AD7676 specifications
| Resolution | 16-bit |
|---|---|
| Sampling Rate | 500 kSPS |
| Architecture | Charge-redistribution SAR |
| Power Supply | 5 V |
| Max Power Dissipation | 67 mW |
| Power-down Current | 7 µW |
| Integral Non-Linearity (INL) | 1.0 LSB |
| Signal-to-Noise Ratio (SNR) | 92 dB minimum |
Source: Analog Devices EE-247 Interfacing AD7676 ADCs to ADSP-21065L Processors Application Note
All Analog Devices AD7676 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
How many bits of data does the AD7676 transfer?
The AD7676 transfers 16-bit digitized data to the processor.
From: Analog Devices EE-247 Interfacing AD7676 ADCs to ADSP-21065L Processors Application Note
What processor is used in the example interface?
The example interface uses the ADSP-21065L SHARC processor.
From: Analog Devices EE-247 Interfacing AD7676 ADCs to ADSP-21065L Processors Application Note
What mode of operation is covered in this note?
The application note discusses an interface in master serial mode only.
How many bits are read initially from the ADC?
The serial port is configured for a word length of 15 bits initially, followed by dummy reads.
What is the maximum sampling rate of the AD7676?
The AD7676 can sample up to 500 kSPS.
From: Analog Devices AD7676 16‑Bit Differential ADC Datasheet
What supply voltage does the AD7676 require?
It operates from a single 5 V supply (AVDD = DVDD = 5 V).
From: Analog Devices AD7676 16‑Bit Differential ADC Datasheet