•Op-AmpAn 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.
•GainAmount of amplification produced by an Op-Amp. Gain is
independent from the supply voltage (power given for the
Op-Amp to operate).
•Open-Loop ModeFunction of an Op-Amp when the feedback resistor (Rf) is
zero. The Op-Amp operates as a comparator and not as a
linear amplifier.
•ComparatorCompares the –V and +V inputs to see which is greater
and returns a result.
•BandwidthThe range of frequency at which an Op-Amp will function.
(Ideal = ∞)
•Input Offset VoltageEven 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
Maximum Ratings
Supply Voltage
Power Dissipation
Diff. Input Voltage
Input Voltage
Operating Temperature
Offset
Null
- IN
1
2
+ IN
3
-V
4
8
+
-
±18 V
500 mW
±30 V
±15 V
0°C to 70°C
Unused
7
+V
6
Out
5
Offset
Null
Characteristics
Input Offset Voltage
Input Resistance
CMMR
Bandwidth
Slew Rate
2 to 6 mV
.3 to 2 MΩ
70 to 90 dB
.5 to 1.5 MHz
.5 V/µs
Maximum Ratings
Supply Voltage
Power Dissipation
Diff. Input Voltage
Input Voltage
Operating Temperature
Offset
Null
1
8
±18 V
500 mW
±30 V
±15 V
0°C to 70°C
Unused
- +
- IN
2
+ IN
3
-V
4
+ -
7
+V
6
Out
5
Offset
Null
Characteristics
Input Offset Voltage
Input Resistance
CMMR
Bandwidth
1 to 6 mV
.3 to 1 MΩ
70 to 90 dB
.5 to 1.5 MHz
Maximum Ratings
Supply Voltage
Power Dissipation
Input Voltage
Operating Temperature
+Gain
1
- IN
2
+ IN
GND
3
4
+
±15 V
660 mW
±.4 V
0°C to 70°C
8
Gain
7
Bypass
6
+V
5
Out
Characteristics
Input Resistance
50 kΩ
CMMR
70 to 90 dB
Bandwidth
300 kHz
Total Harmonic Distortion 0.2%
1
2
Phase
3
Vcc
4
Out
5
6
7
GND Filter NFB
+
8
In
9
Bypass
Maximum Ratings
Characteristics
Supply Voltage
+3 to +32 V
Operating Temperature 0°C to 70°C
Voltage Noise
40 (nV/√Hz)
Slew Rate
Offset Voltage
Output Current
.5 V/µs
+3 to +7 mV
20 mA
R2
R1
In
Out
+
R3
Amplifies and Inverts Input
Gain = -(R2/R1)
In
+
Out
R1
R2
Amplifies Input
Gain = 1+(R2/R1)
Waste of an Op Amp?
+V
Out
In
+
-V
Used to amplify current or
buffer signal.
V ref
V in
V Out
+
The Hardware “If / Else” Statement
Op-Amps have many
applications and can be used
when a signal needs to be
modified, amplified or
compared.
+V
R2
+
R1
R1
R1
R1
R1
+
LED
R1
+
LED
R1
+
-
In
LED
LED
+V +
R1
-
+ -
-V
Source 1
Source 2
Source 3
R1
R1
R1
R1
Out
R1
+
Relient K
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