SGM8534 Shengbang Microelectronics, SGM8534 Datasheet - Page 8

• Manufacturer Part Number: SGM8534
• Description: (SGM8531 - SGM8534) Rail-to-Rail Output CMOS Operational Amplifier
• Manufacturer: Shengbang Microelectronics

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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
Vp
Vn
Figure 5. Instrumentation Amplifier
SGM8531
SGM8531
Figure 4. Differential Amplifier
R1
R3
Vref
2
R4
/ R
SGM8531
1
R2
+ Vref.
R1
R3
2
C. Make sure the filter is
SGM8531
R2
R4
V
OUT
Vref
2
/ R
V
OUT
1
)
８
V
IN
R1
Figure 6. Low Pass Active Filter
R3 = R1 // R2
SGM8531/8532/8534
SGM8531
R2
C
V
OUT