Datasheet

SBOA102A
January 2005
Sensor-Emulator-EVM
System Reference Guide
14
This diagram illustrates how the emulator generates the bridge output and temperature signal for the circuit where the sense resistor is connected to
the top of the bridge. Note how the output voltage of the temperature emulator (0.415V) is fed back to the bottom of the bridgeemulator via the
buffer circuit (U5 and U1c) to emulate the bridge excitation change due to Rtin series with the bridge in the real world. Also, note how the
instrumentation amplifier (U2) is used to translate the temperature signal voltage so that it is referenced to the excitation voltage (Vexc).
Figure 2.16
Emulation Case 2: Rt+ (Resistance in the Top of The Bridge)