Use a high-precision and low-drift resistor for RSense.
The RSense power rating should be considered to ensure that no failures occur at the desired current load.
If a large resistive load is present, a separate
high-voltage supply may be used for driving the current to the load.
The LMP7704-SP supply voltage of 5V was selected according the derating
specifications provided by the National Aeronautics and Space Administration
(NASA) in document EEE-INST-002 (April 2008) and the
European Cooperation for Space Standardization (ECSS) in document ECSS-Q-ST-30-11C Rev.1 (4 October
2011). The documents specify a derating of the absolute maximum supply voltage
for linear ICs to at least 80% and 90%, respectively.
For proper operation, the power supplies must be
decoupled. For supply decoupling, TI recommends placing 10-nF to 1-µF capacitors
as close as possible to the op-amp power supply pins. For the single supply
configuration shown, place a capacitor between the V+ and V– supply pins. Bypass
capacitors must have a low ESR of less than 0.1Ω.