Introduction :
LM324 Quadruple Operational Amplifier from split power supplies is also possible and the low-power supply current drain is independent of the magnitude of the power supply voltage.
Features :
- Wide gain bandwidth: 1.3 MHz
 - Input common mode voltage range includes ground
 - Large voltage gain: 100 dB
 - Very low supply current/amplifier: 375 µA
 - Low input bias current: 20 nA
 - Low input voltage: 3 mV max
 - Low input offset current: 2 nA
 - Wide power supply range:
- Single supply: 3 V to 30 V
 - Dual supplies: ±1.5 V to ±15