SGM2358 sg-micro, SGM2358 Datasheet - Page 8

• Manufacturer Part Number: SGM2358
• Description: 1mhz, General Purpose Cmos Operational Amplifier
• Manufacturer: sg-micro

Typical Application Circuits
Differential Amplifier
The circuit shown in Figure 4 performs the difference function. If
the resistors ratios are equal ( R4 / R3 = R2 / R1 ), then
V
Instrumentation Amplifier
The circuit in Figure 5 performs the same function as that in Figure 4
but with the high input impedance.
Low Pass Active Filter
The low pass filter shown in Figure 6 has a DC gain of ( - R
and the –3dB corner frequency is 1/2πR
within the bandwidth of the amplifier. The Large values of feedback
resistors can couple with parasitic capacitance and cause undesired
effects such as ringing or oscillation in high-speed amplifiers. Keep
resistors value as low as possible and consistent with output loading
consideration.
Vn
Vp
OUT
= ( Vp – Vn ) × R
Figure 5. Instrumentation Amplifier
Vp
Vn
½
½
Figure 4. Differential Amplifier
SGM2358
SGM2358
R1
Vref
R3
2
/ R
1
R4
+ Vref.
½
SGM2358
R2
R3
R1
2
C. Make sure the filter is
½
SGM2358
R2
R4
V
OUT
2
/ R
Vref
1
)
V
８
OUT
V
IN
R1
Figure 6. Low Pass Active Filter
R3 = R1 // R2
½
R2
SGM2358
C
V
SGM2358
OUT