Adobe Digital Negative Converter is the application you need to convert RAW image from your digital camera to DNG format. Its a very simple application which produce a high quality DNG files from any RAW formats. Adobe Digital Negative Converter 9.1.1 is now available and supports Camera Raw 7.1 and later.
You may convert multiple RAW files automatically using this software (batch conversion). You can select the compression/image size, preview size and also embed Original Raw Files if you want. Adobe Digital Negative Converter 9.1.1 is available for free from Adobe website. You can download the installation setup for Adobe Digital Negative Converter 9.1.1 from this link directly.
To convert RAW files, simply select the folder containing your RAW files and then select the destination folder. You can use the same folder as the RAW files if you like. Then, press Convert to start the conversion process.