SLVU006A Datasheet, PDF (23/28 Pages) Texas Instruments – UNIVERSAL OPERATIONAL AMPLIFIER EVALUATION MODULE

Inverting Amplifier
3.4 Inverting Amplifier
Figure 3–3 shows area 300 equipped with a single operational amplifier
configured as an inverting amplifier using dual power supplies. Note the pinout
for the operational amplifier in area 300 follows the TLV2211 type pinout.
Basic setup is done by choice of input and feedback resistors. The transfer
function for the circuit as shown is:
+ V_OUT
–V_IN
R305
R307
To cancel the effects of input bias current, set R317 = R305 || R307, or use a
0 Ω jumper for R317 if the operational amplifier is a low input bias operational
amplifier.
Figure 3–3. Inverting Amplifier with Dual Supply Using Area 300
R318
C305
V3+
V3+
GND3
V3–
C304
0.1 µF
C303
1 µF
C309
0.1 µF
C310
1 µF
Power Supply Bypass ^V3–
301–
302–
303+
+ ³⁰⁴⁺
Vin
–
R306
R307
R308
R309
C312
R319
C311
R305
R305
V3+
VOUT = –VIN _R307
3 _{–5 4}
1 _{+ 2 U301}
3OUT
R317 = R305 II R307,
V3–
or Short if Using Low
Input Bias Op Amp
R317
V3+
R314
VREF3
R315 _C
R
A
R316
U302
Voltage Reference
Not Used
C306
Example Circuits
3-5