From the user's guide of the TSW3082 and DAC5682z EVM:
1.Can i use the chip of the DAC5670 replace the chip DAC5682Z,and use the same network between the
DAC5682Z and TRF3703-33?
From the datasheet about the DAC5682Z, i find that "BIASJ: Full-scale output current bias.For 20mA full-scale output current,connecta 960Ohm resistor to GND."
I have some question i can not understand.
1.Is the full-scale output current meant to the IOUTFS?
2.To reach to the 20mA full-scale output current, how to calculate the value of the Rbias?
3."The default full-scale output current equals 16times this bias current and can thus be expressed as: IOUTFS=16×IBIAS=16×VEXTIO/ RBIAS". Is the voltage of VEXTIO 1.2v ?
The DAC5682z and DAC5670 has the same level of output compliance voltage range (AVDD +/-0.5V). Therefore, you can use the same network for the DAC5682z and TRF3703-33. Note the two devices are not pin-compatible.
Regarding the other questions.
1. Yes, full-scale output current is the same as IOUTFS
2. you can use the equation IOUTFS = 16xVEXTIO/RBIAS. With VEXTIO = 1.2V for internal reference and max full-scale current of 20mA, the RBIAS is set to be 960ohm.
3. VEXTIO = 1.2V nominal for both internal and external reference mode.
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.