AD7714-3: Signal Conditioning ADC
Introduction
The AD7714 is a complete analog front end for low-frequency applications providing either three fully-differential or five pseudo-differential input channels. The device accepts low-level signals directly from a transducer and outputs a serial digital word. It employs a sigma-delta technique to realize up to 24-bits of no missing codes performance. Full data on the AD7714-3 is available in the AD7714 data sheet available from Analog Devices and should be consulted in conjunction with this Technical Note when using the Evaluation Board.
Included on the evaluation board, along with the AD7714-3, are an AD589, a +1.23 V precision bandgap reference, a 2.4576 MHz crystal and digital buffers to buffer signals to and from the edge connectors. Interfacing to this board is provided either through a 36-Way Centronics connector or through a 9-way D-type connector. External sockets are provided for the analog inputs, an external reference input option and an external master clock option.
Features
- Operates from a Single +3 V Supply
- On-Board Reference and Digital Buffers
- Various Linking Options
- Direct Hook-Up to Printer Port of PC
- PC Software for Control and Data Analysis
Documentation
Technical notes are available in Adobe Acrobat Portable Document Format (PDF).
To download the Technical Note, select the link below:
Software
The software provided runs under Windows 3.1 and will allow the user to control all the functions of the AD7714 via the printer port of a PC. The software should be installed by running the SETUP.EXE program.
To download the software, select the link below:
