Part Number: DRV595
I am using DRV595 to drive TEC. In the datasheet, it says "To use the DRV595 with a single-ended source, use a voltage divider to bias IN- to 3.0V, and apply the single-ended signal to IN+." Is there a reason why it needs to be specifically biased at 3V? Will it be okay to bias IN- to 1.25V and apply the single-ended signal to IN+?
In reply to Shawn Zheng:
In reply to Fred Huettig:
Hi Shawn, excellent point about the reduced input range when biasing away from mid-scale, thank you. In our case even with the lowest gain (10x) we should have plenty of margin as we only need +/-4V output, so with IN- at 1.25V then IN+ only needs to swing between 0.85 and 1.65. Based on your update I think we're OK. It wouldn't be terrible to add some offset & gain to work with a 3V midpoint, but this circuit is replicated 4 times per board so if there's no need for extra parts we'd rather not add them. Thanks again. -Fred
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.