Wire Operational Amplifiers (Op Amps) 2,034

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Part RoHS Manufacturer Amplifier Type Temperature Grade Terminal Form No. of Terminals Package Code Package Shape Total Dose (V) Package Body Material Nominal Unity Gain Bandwidth Maximum Negative Supply Voltage Limit Low-Bias Maximum Input Offset Voltage Maximum Average Bias Current (IIB) Surface Mount No. of Functions Minimum Common Mode Reject Ratio Technology Screening Level Nominal Common Mode Reject Ratio Maximum Supply Current Nominal Negative Supply Voltage (Vsup) Architecture Programmable Power Packing Method Nominal Supply Voltage / Vsup (V) Power Supplies (V) Package Style (Meter) Package Equivalence Code Maximum Input Offset Current (IIO) Minimum Slew Rate Sub-Category Nominal Slow Rate Maximum Non Linearity Maximum Supply Voltage Limit Terminal Pitch Maximum Operating Temperature Maximum Bias Current (IIB) @25C Maximum Common Mode Voltage Nominal Response Time Output Type Frequency Compensation Minimum Voltage Gain Minimum Operating Temperature Terminal Finish Nominal Voltage Gain Terminal Position Low-Offset JESD-30 Code Maximum Voltage Gain Moisture Sensitivity Level (MSL) Maximum Seated Height Width Qualification Minimum Output Current Nominal Bandwidth (3dB) Micropower JESD-609 Code Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Length Wideband Power

OP02AJ/883

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

1.3 MHz

-22 V

1000 uV

60 nA

No

1

BIPOLAR

MIL-STD-883

95 dB

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

0.25 V/us

Operational Amplifiers

0.5 V/us

22 V

125 °C (257 °F)

30 nA

Yes

50000

-55 °C (-67 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

e0

5962-01-061-7691

Analog Devices

Operational Amplifier

Commercial

Wire

8

Round

Metal

14000 uV

1

BIPOLAR

6 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

80 V/us

Operational Amplifiers

20 V

70 °C (158 °F)

250 nA

YES (AVCL>=3)

5000

0 °C (32 °F)

Bottom

No

O-MBCY-W8

No

AD707SH

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

900 kHz

-22 V

25 uV

1.5 nA

No

1

130 dB

BIPOLAR

140 dB

3 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

0.15 V/us

Operational Amplifiers

0.3 V/us

22 V

125 °C (257 °F)

1.5 nA

Yes

5000000

-55 °C (-67 °F)

Tin Lead

Bottom

Yes

O-MBCY-W8

No

e0

AD841KH

Analog Devices

Operational Amplifier

Commercial Extended

Wire

12

TO-8

Round

Metal

40 MHz

-18 V

3300 uV

6 uA

No

1

103 dB

BIPOLAR

109 dB

14 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

QUAD12,.4SQ

200 V/us

Operational Amplifiers

300 V/us

18 V

0.1 in (2.54 mm)

75 °C (167 °F)

5 uA

Yes

25000

0 °C (32 °F)

Gold

Bottom

No

O-MBCY-W12

No

e4

AD711CH/+

Analog Devices

Operational Amplifier

Industrial

Wire

8

Round

Metal

Yes

450 uV

1

2.8 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

18 V/us

Operational Amplifiers

18 V

85 °C (185 °F)

25 pA

Yes

100000

-40 °C (-40 °F)

Tin/Lead

Bottom

Yes

O-MBCY-W8

e0

OP05AJ

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

600 kHz

-22 V

240 uV

4 nA

No

1

114 dB

BIPOLAR

123 dB

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

0.1 V/us

Operational Amplifiers

0.3 V/us

22 V

125 °C (257 °F)

2 nA

Yes

300000

-55 °C (-67 °F)

Tin Lead

Bottom

Yes

O-MBCY-W8

No

e0

AD846SH/883B

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

350 uV

1

BIPOLAR

38535Q/M;38534H;883B

7 mA

-15 V

Current Feedback

15 V

±15 V

Cylindrical

CAN8,.2

Operational Amplifiers

18 V

125 °C (257 °F)

15 uA

No

-55 °C (-67 °F)

Tin/Lead

Bottom

Yes

O-MBCY-W8

No

e0

5962-01-317-0886

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

Yes

900 uV

1

38535Q/M;38534H;883B

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

Operational Amplifiers

125 °C (257 °F)

Yes

-55 °C (-67 °F)

Bottom

Yes

O-MBCY-W8

No

OP01CJ

Analog Devices

Operational Amplifier

Commercial

Wire

8

TO-99

Round

Metal

2.5 MHz

-20 V

5000 uV

100 nA

No

1

80 dB

BIPOLAR

100 dB

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

12 V/us

Operational Amplifiers

18 V/us

20 V

70 °C (158 °F)

100 nA

Yes

25000

0 °C (32 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

e0

AD707TH

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

900 kHz

-22 V

15 uV

1 nA

No

1

130 dB

BIPOLAR

140 dB

3 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

0.15 V/us

Operational Amplifiers

0.3 V/us

22 V

125 °C (257 °F)

1 nA

Yes

8000000

-55 °C (-67 °F)

Tin Lead

Bottom

Yes

O-MBCY-W8

No

e0

5962-01-112-0036

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

Yes

3000 uV

1

7 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

50 V/us

Operational Amplifiers

125 °C (257 °F)

15 pA

No

50000

-55 °C (-67 °F)

Bottom

No

O-MBCY-W8

No

5962-01-276-6460

Analog Devices

Operational Amplifier

Industrial

Wire

8

Round

Metal

Yes

400 uV

1

3.5 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

1 V/us

Operational Amplifiers

18 V

85 °C (185 °F)

3 pA

Yes

500000

-40 °C (-40 °F)

Bottom

Yes

O-MBCY-W8

No

OP17BJ/883

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

28 MHz

-22 V

Yes

1000 uV

250 pA

No

1

BIPOLAR

MIL-STD-883

97 dB

7 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

35 V/us

Operational Amplifiers

60 V/us

22 V

125 °C (257 °F)

100 pA

YES (AVCL>=5)

30000

-55 °C (-67 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

e0

M38510/13502BGX

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

-22 V

200 uV

6 nA

No

1

BIPOLAR

106 dB

-15 V

15 V

Cylindrical

Operational Amplifiers

0.08 V/us

22 V

125 °C (257 °F)

-55 °C (-67 °F)

Bottom

O-MBCY-W8

Yes

PM156AJ

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

4.5 MHz

-22 V

Yes

2500 uV

25 nA

No

1

85 dB

BIPOLAR

100 dB

7 mA

-15 V

Voltage Feedback

15 V

±15/±20 V

Cylindrical

CAN8,.2

10 nA

10 V/us

Operational Amplifiers

12 V/us

22 V

125 °C (257 °F)

50 pA

Yes

50000

-55 °C (-67 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

e0

OP64FJ

Analog Devices

Operational Amplifier

Industrial

Wire

8

TO-99

Round

Metal

80 MHz

-18 V

2000 uV

2 uA

No

1

84 dB

BIPOLAR

94 dB

8 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

130 V/us

Operational Amplifiers

170 V/us

18 V

85 °C (185 °F)

2 uA

YES (AVCL>=5)

10000

-40 °C (-40 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

e0

Yes

OP17AJ/883C

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

30 MHz

-22 V

900 uV

130 pA

No

1

BIPOLAR

MIL-STD-883

97 dB

-15 V

15 V

Cylindrical

Operational Amplifiers

60 V/us

22 V

125 °C (257 °F)

-55 °C (-67 °F)

Tin Lead

Bottom

O-MBCY-W8

No

e0

OP42BIFJ

Analog Devices

Operational Amplifier

Other

Wire

8

TO-99

Round

Metal

10 MHz

-20 V

2500 uV

2 nA

No

1

BIPOLAR

94 dB

-15 V

15 V

Cylindrical

50 V/us

20 V

85 °C (185 °F)

-25 °C (-13 °F)

Tin Lead

Bottom

O-MBCY-W8

No

e0

AD548TH

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

1 MHz

-18 V

Yes

500 uV

10 pA

No

1

82 dB

BIFET

92 dB

200 μA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

1 V/us

Operational Amplifiers

1.8 V/us

18 V

125 °C (257 °F)

10 pA

Yes

150000

-55 °C (-67 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

Yes

e0

AD381LH

Analog Devices

Operational Amplifier

Commercial

Wire

8

TO-99

Round

Metal

5 MHz

Yes

250 uV

100 pA

No

1

80 dB

CMOS

80 dB

5 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

20 V/us

Operational Amplifiers

30 V/us

70 °C (158 °F)

100 pA

Yes

100000

0 °C (32 °F)

Tin Lead

Bottom

Yes

O-MBCY-W8

No

e0

OP27AJ5

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

60 uV

60 nA

No

1

BIPOLAR

108 dB

6 mA

-15 V

15 V

Cylindrical

Operational Amplifiers

125 °C (257 °F)

-55 °C (-67 °F)

Tin Lead

Bottom

O-MBCY-W8

No

e0

PM357BIAJ

Analog Devices

Operational Amplifier

Commercial

Wire

8

TO-99

Round

Metal

20 MHz

-22 V

2300 uV

5 nA

No

1

BIPOLAR

100 dB

-15 V

15 V

Cylindrical

45 V/us

22 V

70 °C (158 °F)

0 °C (32 °F)

Tin Lead

Bottom

O-MBCY-W8

No

e0

PM108AJ/883C

Analog Devices

Operational Amplifier

Military

Wire

8

Round

-20 V

1000 uV

3 nA

No

1

BIPOLAR

MIL-STD-883

110 dB

-15 V

15 V

Cylindrical

Operational Amplifiers

20 V

125 °C (257 °F)

-55 °C (-67 °F)

Bottom

O-XBCY-W8

No

AD741H

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

1 MHz

-22 V

6000 uV

1.5 uA

No

1

70 dB

90 dB

2.8 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

Operational Amplifiers

0.5 V/us

22 V

125 °C (257 °F)

500 nA

Yes

50000

-55 °C (-67 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

e0

5962-01-329-9228

Analog Devices

Operational Amplifier

Other

Wire

8

Round

Metal

50 uV

1

BIPOLAR

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

1.7 V/us

Operational Amplifiers

22 V

85 °C (185 °F)

40 nA

Yes

750000

-25 °C (-13 °F)

Bottom

Yes

O-MBCY-W8

No

AD540KH

Analog Devices

Operational Amplifier

Commercial

Wire

8

Round

Metal

Yes

20000 uV

1

Voltage Feedback

±5/±15 V

Cylindrical

CAN8,.2

Operational Amplifiers

70 °C (158 °F)

Yes

0 °C (32 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

e0

OP41BJ

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

500 kHz

-18 V

Yes

2000 uV

15 nA

No

1

90 dB

BIPOLAR

100 dB

1.2 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

1 V/us

Operational Amplifiers

1300 V/us

18 V

125 °C (257 °F)

10 pA

Yes

500000

-55 °C (-67 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

e0

5962-8770602GA

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

-22 V

Yes

1000 uV

100 pA

No

1

MIL-STD-883

86 dB

11 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

35 V/us

Operational Amplifiers

22 V

125 °C (257 °F)

200 pA

YES (AVCL>=5)

30000

-55 °C (-67 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

e0

OP77AJ/883

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

600 kHz

-22 V

25 uV

2 nA

No

1

BIPOLAR

38535Q/M;38534H;883B

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

0.1 V/us

Operational Amplifiers

0.3 V/us

22 V

125 °C (257 °F)

2 nA

Yes

2000000

-55 °C (-67 °F)

Tin Lead

Bottom

Yes

O-MBCY-W8

No

e0

M38510/13501SGA

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

-22 V

60 uV

4 nA

No

1

BIPOLAR

38535V;38534K;883S

106 dB

5 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

0.08 V/us

Operational Amplifiers

0.08 V/us

22 V

125 °C (257 °F)

2 nA

Yes

200000

-55 °C (-67 °F)

Tin/Lead - hot dipped

Bottom

Yes

O-MBCY-W8

No

e0

OP15BIGJ

Analog Devices

Operational Amplifier

Industrial

Wire

8

TO-99

Round

Metal

5.4 MHz

3800 uV

400 pA

No

1

BIPOLAR

94 dB

-15 V

15 V

Cylindrical

85 °C (185 °F)

-40 °C (-40 °F)

Tin Lead

Bottom

O-MBCY-W8

No

e0

OP06BIFJ

Analog Devices

Operational Amplifier

Commercial

Wire

8

TO-99

Round

Metal

600 uV

80 nA

No

1

BIPOLAR

112 dB

-15 V

15 V

Cylindrical

70 °C (158 °F)

0 °C (32 °F)

Tin Lead

Bottom

O-MBCY-W8

No

e0

AD648SH/883B

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

1 MHz

Yes

2000 uV

30 pA

No

2

BIPOLAR

38535Q/M;38534H;883B

70 dB

400 μA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

1 V/us

Operational Amplifiers

18 V

125 °C (257 °F)

Yes

150000

-55 °C (-67 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

Yes

e0

OP43BIEJ

Analog Devices

Operational Amplifier

Other

Wire

8

Round

Metal

2.4 MHz

750 uV

500 pA

No

1

BIPOLAR

110 dB

1.2 mA

-15 V

15 V

Cylindrical

Operational Amplifiers

6 V/us

85 °C (185 °F)

-25 °C (-13 °F)

Tin Lead

Bottom

O-MBCY-W8

No

e0

RH1056AH

Analog Devices

Operational Amplifier

Military

Wire

8

Round

200k Rad(Si)

Metal

-20 V

870 uV

2 nA

No

1

86 dB

-15 V

15 V

Cylindrical

Operational Amplifiers

20 V

125 °C (257 °F)

-55 °C (-67 °F)

Tin/Lead

Bottom

O-MBCY-W8

No

e0

JM38510/11401BGA

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

-22 V

7000 uV

3.5 nA

No

1

85 dB

JFET

11 mA

Cylindrical

2 V/us

Operational Amplifiers

22 V

125 °C (257 °F)

25000

-55 °C (-67 °F)

Tin Lead

Bottom

O-MBCY-W8

No

e0

PM155AJ/883C

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

2.5 MHz

Yes

2500 uV

1

38535Q/M;38534H;883B

4 mA

Voltage Feedback

±15/±20 V

Cylindrical

CAN8,.2

10 nA

3 V/us

Operational Amplifiers

22 V

125 °C (257 °F)

50 pA

Yes

25000

-55 °C (-67 °F)

Tin/Lead

Bottom

No

O-MBCY-W8

No

e0

AD9610TH

Analog Devices

Operational Amplifier

Military

Wire

12

QIP

Round

Metal

100 MHz

-18 V

1000 uV

50 uA

No

1

35 dB

Hybrid

MIL-STD-883

50 dB

27 mA

-15 V

Current Feedback

15 V

±15 V

Cylindrical

QUAD12,.4SQ

3000 V/us

Operational Amplifiers

3.5 V/us

18 V

0.1 in (2.54 mm)

125 °C (257 °F)

50 uA

Yes

-55 °C (-67 °F)

Tin Lead

Bottom

No

O-MBCY-W12

No

e0

Yes

OP12FJ

Analog Devices

Operational Amplifier

Commercial

Wire

8

TO-99

Round

Metal

800 kHz

-22 V

No

300 uV

2 nA

No

1

104 dB

BIPOLAR

120 dB

-20 V

Voltage Feedback

No

20 V

±20 V

Cylindrical

CAN8,.2

Operational Amplifiers

0.12 V/us

22 V

70 °C (158 °F)

2 nA

Yes

50000

0 °C (32 °F)

Tin Lead

Bottom

Yes

O-MBCY-W8

No

Yes

e0

No

No

M38510/13501SGX

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

-22 V

60 uV

4 nA

No

1

BIPOLAR

106 dB

-15 V

15 V

Cylindrical

Operational Amplifiers

0.08 V/us

22 V

125 °C (257 °F)

-55 °C (-67 °F)

Bottom

O-MBCY-W8

No

AD846AH

Analog Devices

Operational Amplifier

Industrial

Wire

8

Round

Metal

350 uV

1

BIPOLAR

6.5 mA

-15 V

Current Feedback

15 V

±15 V

Cylindrical

CAN8,.2

Operational Amplifiers

18 V

85 °C (185 °F)

7.725 uA

No

-40 °C (-40 °F)

Tin/Lead

Bottom

Yes

O-MBCY-W8

No

e0

OP14AJ/883

Analog Devices

Operational Amplifier

Military

Wire

8

TO-99

Round

Metal

1.3 MHz

-22 V

1500 uV

60 nA

No

2

BIPOLAR

MIL-STD-883

100 dB

6 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

0.25 V/us

Operational Amplifiers

0.5 V/us

22 V

125 °C (257 °F)

50 nA

Yes

50000

-55 °C (-67 °F)

Tin Lead

Bottom

No

O-MBCY-W8

No

e0

ADOP-27FH

Analog Devices

Operational Amplifier

Other

Wire

8

TO-99

Round

Metal

8 MHz

-18 V

60 uV

55 nA

No

1

106 dB

BIPOLAR

123 dB

4.6 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

1.7 V/us

Operational Amplifiers

2.8 V/us

18 V

85 °C (185 °F)

55 nA

Yes

800000

-25 °C (-13 °F)

Tin Lead

Bottom

Yes

O-MBCY-W8

No

e0

5962R9863901VGX

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

-22 V

400 uV

125 nA

No

1

MIL-PRF-38535

110 dB

-15 V

15 V

Cylindrical

Operational Amplifiers

22 V

125 °C (257 °F)

-55 °C (-67 °F)

Bottom

O-MBCY-W8

Yes

5962-01-346-7287

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

Yes

1000 uV

1

38535Q/M;38534H;883B

4 mA

-15 V

Voltage Feedback

15 V

±15 V

Cylindrical

CAN8,.2

50 V/us

Operational Amplifiers

18 V

125 °C (257 °F)

150 pA

Yes

100000

-55 °C (-67 °F)

Bottom

No

O-MBCY-W8

No

5962-01-220-5268

Analog Devices

Operational Amplifier

Commercial

Wire

8

Round

Metal

2.5 MHz

Yes

2300 uV

1

4 mA

Voltage Feedback

±15/±20 V

Cylindrical

CAN8,.2

1 nA

3 V/us

Operational Amplifiers

22 V

70 °C (158 °F)

50 pA

Yes

25000

0 °C (32 °F)

Bottom

No

O-MBCY-W8

No

M38510/11402SGX

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

-22 V

7000 uV

No

1

-15 V

15 V

Cylindrical

Operational Amplifiers

22 V

125 °C (257 °F)

-55 °C (-67 °F)

Bottom

O-MBCY-W8

No

M38510/11401BGA

Analog Devices

Operational Amplifier

Military

Wire

8

Round

Metal

-22 V

Yes

7000 uV

No

1

MIL-PRF-38535 Class B

-15 V

Voltage Feedback

15 V

±15/±20 V

Cylindrical

CAN8,.2

Operational Amplifiers

22 V

125 °C (257 °F)

Yes

-55 °C (-67 °F)

Bottom

No

O-MBCY-W8

No

Operational Amplifiers (Op Amps)

Operational amplifiers, or op-amps for short, are electronic circuits that provide a high gain amplification of an input voltage signal. They are widely used in electronic circuits for various signal processing tasks due to their versatile nature and high gain characteristics.

An op-amp typically has two input terminals (inverting and non-inverting), an output terminal, and a power supply. The output voltage of the op-amp is proportional to the difference between the voltages at the two input terminals, with the exact gain being determined by the circuit design.

Op-amps can be used in a variety of electronic circuits such as filters, amplifiers, oscillators, and voltage regulators. They can also be used as comparators, with the output switching to one of two voltage levels depending on the relationship between the two input voltages.

One of the main advantages of op-amps is that they can provide a very high gain, making them useful in amplifying small signals or reducing noise. They also have a wide range of input and output impedance, making them compatible with a wide range of electronic circuits. Additionally, op-amps can be designed to have very high input impedance, which means they can detect and amplify signals with minimal loading effects on the circuit they are connected to.