Op-Amp- An active circuit element designed to perform mathematical operations of addition,...
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•Op-Amp-An active circuit element designed to perform mathematical operations of addition, subtraction, multiplication, division, differentiation and integration. (Textbook)
High performance linear amplifier that requires a power source to operate.
•Gain- Amount of amplification produced by an Op-Amp. Gain is independent from the supply voltage (power given for the Op-Amp to operate).
•Open-Loop Mode-Function of an Op-Amp when the feedback resistor (Rf) is zero. The Op-Amp operates as a comparator and not as a linear amplifier.
•Comparator-Compares the –V and +V inputs to see which is greater and returns a result.
•Bandwidth- The range of frequency at which an Op-Amp will function.(Ideal = ∞)
•Input Offset Voltage- Even when there is no input voltage the Op-Amp gives off a small voltage. This can be canceled out by use of the Offset Null pin on the chip.(Non-Ideal)
•Common Mode Rejection Ratio (CMRR)- Ability of an Op-Amp to reject a signal applied to both inputs simultaneously.
•Slew Rate (V/µs)-Amount of time it takes for the Op-Amp to step to another voltage level. (Non-Ideal)
Total Harmonic Distortion (THD) (%)- “Percent Error” of an Op-Amp. Amount of deviation from the ideal output signal. (Non-Ideal)
Large Amount of TMD
1
2
3
4 5
6
7
8
+
-
- IN
OffsetNull
+ IN
- V
Out
Offset Null
+ V
UnusedCharacteristics
Input Offset Voltage 2 to 6 mVInput Resistance .3 to 2 MΩCMMR 70 to 90 dBBandwidth .5 to 1.5 MHzSlew Rate .5 V/µs
Maximum Ratings
Supply Voltage ±18 VPower Dissipation 500 mWDiff. Input Voltage ±30 VInput Voltage ±15 VOperating Temperature 0°C to 70°C
1
2
3
4 5
6
7
8
+-
+ -
- IN
OffsetNull
+ IN
- V
Out
Offset Null
+ V
Unused
Maximum Ratings
Supply Voltage ±18 VPower Dissipation 500 mWDiff. Input Voltage ±30 VInput Voltage ±15 VOperating Temperature 0°C to 70°C
Characteristics
Input Offset Voltage 1 to 6 mVInput Resistance .3 to 1 MΩCMMR 70 to 90 dBBandwidth .5 to 1.5 MHz
+
-
1
2
3
4 5
6
7
8
GND Out
+ V
Gain
- IN Bypass
+ IN
+Gain
Maximum Ratings
Supply Voltage ±15 VPower Dissipation 660 mWInput Voltage ±.4 VOperating Temperature 0°C to 70°C
Characteristics
Input Resistance 50 kΩCMMR 70 to 90 dBBandwidth 300 kHzTotal Harmonic Distortion 0.2%
+-
1 2 3 4 5 6 7 8 9
Phase Vcc Out GND NFBFilter BypassIn
Maximum Ratings
Supply Voltage +3 to +32 VOperating Temperature 0°C to 70°CVoltage Noise 40 (nV/√Hz)
Characteristics
Slew Rate .5 V/µsOffset Voltage +3 to +7 mVOutput Current 20 mA
+
-R1
R3
R2
Amplifies and Inverts Input
Gain = -(R2/R1)
Out
In
+
-
R1R2
Amplifies Input
Gain = 1+(R2/R1)
In
Out
+
-Out
In
Used to amplify current or buffer signal.
+V
-V
Waste of an Op Amp?
+
-
V in
The Hardware “If / Else” Statement
V OutV ref
Op-Amps have many applications and can be used when a signal needs to be modified, amplified or compared.
+
-
+
-
+
-
+
-
In
R1
R1
R1
R1
R1
R1
R1
R1
R2
+V
-V+V + - + -
LED
LED
LED
LED
R1
R1
R1R1
R1
+
-
Source 1
Source 2
Source 3
Out
Relient K
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