Texas Instruments DAC161P997 Evaluation Board DAC161P997EVAL/NOPB DAC161P997EVAL/NOPB 데이터 시트
제품 코드
DAC161P997EVAL/NOPB
National Semiconductor
DAC161P997EVAL User’s Guide
2011 National Semiconductor Corporation Page 5 of 11 Rev: 0.00
4. Default Set-Up and Power-Up
As shipped the DAC161P997 Test Board is configured to be powered directly from the 0-20mA loop.
Local LDO (LM2936) provides 3.3V to DAC161P997 by stepping down the loop supply.
The loop is connected via terminals 5 and 6 of J1 connector. The optional shunt between terminals 2
and 3 will power up the on board diagnostic LEDs.
Jumper block
Shunt position
Function
LOCAL LDO
in
Connects the output of the 3.3V LDO to the VD (VA) rail of the
DAC161P997
ERRLVL SEL
[COM, CENTER]
Sets the input to the ERRLVL pin of DAC161P997
VDDIO
[1,2]
Provides the rail potential to the stimulus board (SPIO-4).
Once the above jumpers are in place, turn on the 5V power supply. In the configuration
shown here the loop current sourced from OUT is 3.3mA.