"Chapter 1 - The Op Amp's Place in the World" - HTL Wien 10

Simultaneous Equations
4-12
VIN = 0.01 V to 1 V
0.01 µF
R1
10 kΩ
Figure 4–11.Case 1 Example Circuit
– Input Voltage – V
V IN
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
+5V
R2
180 kΩ
RG
10 kΩ
+
_
+5V
VOUT – Output Voltage – V
0.01 µF
RF
27 kΩ RL
10 kΩ
TLV247x
0.0
0 1 2 3 4 5
Figure 4–12. Case 1 Example Circuit Measured Transfer Curve
VOUT = 1.0 to 4.5 V
The transfer curve shown is a straight line, and that means that the circuit is linear. The
V OUT intercept is about 0.98 V rather than 1 V as specified, and this is excellent performance
considering that the components were selected randomly from bins of resistors.
Different sets of components would have slightly different slopes because of the resistor
tolerances. The TLV247X has input bias currents and input offset voltages, but the effect
of these errors is hard to measure on the scale of the output voltage. The output voltage