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TL081H: Technical query Regrading OPamp TL081HIDBVR

Part Number: TL081H
Other Parts Discussed in Thread: LM7705, OPA320,

Hi Taru

 

We have used opamp TL081HIDBVR in our Design. Just a query if this opamp can work with below input voltage range

 

Input at non inverting terminal= 0V to 3.5V

 

SCH is attached

PWM_MCU is 5K with varying duty cycle 0 % to 100%  (Voltage level 0V to 3.45V)

 

Resistor R11 and Capacitor C17 filter the PWM and product below voltage across C17 (non-inverting terminal of opamp)

 

Voltage (PWM)

Duty Cycle(100% to 0%)

Voltage across C17

3.45

100

3.45

3.45

90

3.105

3.45

80

2.76

3.45

70

2.415

3.45

60

2.07

3.45

50

1.725

3.45

40

1.38

3.45

30

1.035

3.45

20

0.69

3.45

10

0.345

3.45

9

0.3105

3.45

8

0.276

3.45

7

0.2415

3.45

6

0.207

3.45

5

0.1725

3.45

4

0.138

3.45

3

0.1035

3.45

2

0.069

3.45

1

0.0345

3.45

0

0

 

Thanks

Kunal Barot