12-bit High Speed, Low Power, Successive-Approximation ADC
Introduction
This Technical Note describes the evaluation board for the AD7492 12-bit, high speed, low power, internal reference and clock, successive approximation A/D converter that operates from a single 2.7 V to 5.25 V supply. Full data on the AD7492 is available in the AD7492 data sheet available from Analog Devices. It can be downloaded from the AD7492 product page and should be consulted in conjunction with this Technical Note when using the Evaluation Board.
On-board components include an AD780 which is a pin programmable +2.5 V or +3 V ultra high precision bandgap reference, two AD797 op-amps used to buffer the analog input, and an OP07 op-amp used to buffer the DC bias voltage applied to the optional analog input bias-up circuit.
Interfacing to this board is through a 96-way connector. This 96-way connector is compatible with the EVAL-CONTROL BRD2 which is also available from Analog Devices. External sockets are provided for the CONVST input and the VIN inputs.
Documentation
Technical notes are available in Adobe Acrobat Portable Document Format (PDF).
To download the Technical Note, select the link below:
- EVAL-AD7492CB (pdf, 740,620 bytes)
Software
Included in the EVAL-AD7492CB evaluation board package is software for controlling and evaluating the performance of the AD7492 when it is operated with the Evaluation Board Controller. The EVAL-AD7492CB Demonstration/Evaluation Software runs under Windows 95, 98, 2000 & NT. The user interface on the PC is via a dedicated program written especially for the EVAL-AD7492.
To download the software, select the link below:
- AD7492.zip (zip, 3,239,033 bytes)