SBOA594 August   2024 OPA2990

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Circuit Description
  6. 3 Supporting Multiple Output Ranges
  7. 4 Resistor Sizing, M2 Selection, and Other Design Considerations
  8. 5 Mode and Range Control
  9. 6 Supply Level for Current Output
  10. 7 Supply Levels for Voltage Output
  11. 8 Protection Features
  12. 9 Measurement Results
  13. 10Power Consumption
  14. 11Error Monte-Carlo Analysis
  15. 12Rise and Fall Times
  16. 13Building Multi-Channel Output
  17. 14Summary
  18. 15References

10 Power Consumption

To calculate the efficiency of the output stage, power consumption of different parts of the circuits are shown in the following tables for both voltage and current modes (using VCC=24V supply and VSS=-12V), and no load for voltage mode.

Table 10-1 Power Consumption in Current Output Mode
Output U1 and U2 I(M1) TPS26614 U3 and U4 Total (mA)
4mA 0.55 0.4 0.8 0.03 1.78
20mA 0.7 2 0.8 0.03 3.53
Table 10-2 Power Consumption in Voltage Output Mode
Output U1 and U2 I(M1) TPS26614 U3 and U4

VCC, VSS

 Total (mA) VCC, VSS
-10 0.03 0 0.8 0.23, -0.59 1.06, -0.59
0 0.03 0 0.8 0.23, -0.24 1.06, -0.24
10 0.03 0 0.8 0.53, -0.24 1.36, -0.24