The UA741CP is a classic operational amplifier (Op-Amp) produced by Texas Instruments and other manufacturers. It was one of the earliest operational amplifiers, found in a wide range of applications, and also had offset voltage zeroing capabilities.

The high common-mode input voltage range and the absence of latch-up make the amplifier ideal for voltage-follower applications. The device is short-circuit protected and the internal frequency compensation ensures stability without external components.

The UA741CP is a general-purpose operational amplifier in an 8-pin DIP package. The high common-mode input voltage range and lack of latch-up make the amplifier ideal for voltage follower applications. The device features short-circuit protection and internal frequency compensation to ensure stability without external components. A low value potentiometer can be connected between the offset zero inputs to eliminate the offset voltage.

Ⅰ.Specification parameters of UA741CP

•Product Category:Operational Amplifier - Operational Amplifier
•Installation style:Through Hole
•Package/Case: PDIP-8
•Number of channels:1Channel
•Supply voltage - maximum:36 V
•Supply voltage - minimum:7 V
•GBP-gain bandwidth product:1MHz
•Output current per channel:25mA
•SR-slew rate:500 mV/us
•Supply voltage-minimum:7 V
•Minimum operating temperature:0℃
•Maximum operating temperature:+70℃
•Operating power supply current:1.7 mA
•Ib-input bias current:500nA
•CMRR-Common Mode Rejection Ratio:90 dB
•En-input voltage noise density:20 nV/sqrt Hz
•Package:Tube
•Amplifier type:General Purpose Amplifier
•Dual power supply voltage:+/-5V, +/-9V, +/-12 V, +/-15V
•Minimum dual supply voltage:+/-3.5V
•Maximum dual supply voltage:+/-18 V
•Height: 4.57 mm
•Length:9.81 mm
•Operating power supply voltage:+/-3.5V to +/-18V
•Pd-Power dissipation:500 mW (1/2W)
•Product:Operational Amplifiers
•Product Type:Op Amps-Operational Amplifiers
•Vcm-common mode voltage:Negative Rail+3V to Positive Rail-3V
•Voltage gain dB:106.02 dB
•Unit weight:440.400 mg
•Width:6.35 mm
•Number of elements:1
•Rise time:300 nanoseconds
•Slew rate:0.5V/.s

Ⅱ.Features of UA741CP

1.High gain: UA741CP generally has high gain, making it suitable for many applications that amplify voltage signals.

2.Low input bias current: The input bias current is the weak current flowing into the input pin of the operational amplifier. The UA741CP typically has low input bias current, which helps reduce errors.

3.High input impedance: The high input impedance of the operational amplifier makes it have less impact on the external circuit, helping to maintain the stability of the circuit.

4.Low input noise: In some applications, especially when signal quality requirements are high, low input noise is an important feature. The UA741CP typically has relatively low input noise.

5.Wide input common-mode range: The input common-mode range is the input voltage range that the operational amplifier can handle. UA741CP usually has a wide input common mode range, making it suitable for different application scenarios.

6.Stability: The UA741CP is generally a relatively stable device, which is an important feature for many basic amplification circuits and signal processing applications.

7.Common pin layout: The pin layout of UA741CP is standardized, which makes it easy to replace or replace in different designs.

8.Single power supply operation: Some operational amplifiers require dual power supplies, but the UA741CP can be operated with a single power supply, which makes it more convenient in certain applications.

Ⅲ.Pin Configurations and Functions of UA741CP

Ⅳ.Application fields of UA741CP

1.Amplifier:UA741CP is an operational amplifier, which is widely used in various amplification circuits, including voltage amplifiers, current amplifiers and power amplifiers. Its high gain and stability make it a common choice for amplifier designs. A voltage amplifier is an electronic device used to amplify weak signals. Among voltage amplifiers, UA741CP can be used as a high-gain amplifier to amplify the voltage amplitude of the input signal to provide sufficient output voltage amplitude to drive subsequent circuits. A current amplifier is an electronic device used to amplify weak currents. Among current amplifiers, the UA741CP can achieve current-to-voltage conversion by converting the input current into an output voltage by working with an appropriate feedback resistor.

2.Filter:As an operational amplifier, UA741CP can be used as an excitation element in the filter circuit to help realize various filtering functions, including low-pass filtering, high-pass filtering and band-pass filtering.

•Low-pass filtering: A low-pass filter allows low-frequency signals to pass while suppressing high-frequency signals. In the low-pass filter, UA741CP can be used as an amplifier to amplify the input signal, and at the same time, it can suppress high-frequency signals by using it in conjunction with appropriate resistors and capacitors.

•High-pass filtering: A high-pass filter allows high-frequency signals to pass while suppressing low-frequency signals. In the high-pass filter, UA741CP can be used in conjunction with appropriate resistors and capacitors to amplify the input signal and suppress low-frequency signals at the same time.

•Bandpass filtering: A bandpass filter allows signals in a certain frequency band to pass while suppressing signals in other frequency bands. In the band-pass filter, UA741CP can be used with appropriate resistors, capacitors and inductors to amplify and suppress signals in specific frequency bands, thereby achieving signal screening and extraction.

3.Comparator:Since UA741CP has high gain and high input impedance, it is also often used as a comparator to compare the magnitude of two input signals. When used as a comparator, the output of the UA741CP changes according to the magnitude of the two input signals. When one input signal is greater than the other input signal, the comparator's output goes high; and when the other input signal is greater, the comparator's output goes low. This type of comparator is widely used, for example, in analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) in analog circuits.

4.Integrator and differentiator:UA741CP can be used to implement integrator and differentiator circuits for integral or differential processing of signals, suitable for control systems and signal processing applications.

•Integrator circuit: The integrator circuit can be implemented using an operational amplifier (such as UA741CP) and an RC circuit. Connect the input signal V_in to one terminal of the RC circuit and connect the other terminal to ground. Connect the forward input end of the operational amplifier to the output end of the RC circuit, the reverse input end to ground, and the output end to the output end of the RC circuit. By adjusting the time constant of the RC circuit, the integration speed and amplitude can be controlled.

•Differentiator circuit: The differentiator circuit can be implemented using an operational amplifier (such as UA741CP) and an RC circuit. Connect the input signal V_in to one terminal of the RC circuit and connect the other terminal to ground. Connect the forward input terminal of the operational amplifier to the output terminal of the RC circuit, the reverse input terminal to the output terminal of the RC circuit, and the output terminal to the input terminal of the RC circuit. By adjusting the time constant of the RC circuit, the differential speed and amplitude can be controlled.

5.Signal conditioning:In various measurement and sensor applications, UA741CP can be used for signal conditioning to help improve measurement accuracy and signal quality. Common methods of using UA741CP for signal conditioning:

•Amplification and gain adjustment: UA741CP can be used to amplify the input signal and adjust the gain of the signal. By adjusting the feedback resistor of the operational amplifier, the amplification factor of the signal can be changed. This can help improve the signal-to-noise ratio of the signal and make the signal more suitable for subsequent processing or data acquisition.

•Voltage offset and level adjustment: UA741CP can be used to adjust the DC signal shift level of the signal. By connecting appropriate resistors and capacitors, the DC level of the signal can be adjusted to the system's reference level or the required operating level. This helps improve signal readability and stability.

•Signal filtering: UA741CP can be used to implement low-pass, high-pass or band-pass filters. By connecting appropriate resistors and capacitors, components in a specific frequency range in the signal can be removed or reduced to improve the noise performance of the signal or extract specific frequency components.

•Differential amplification and subtractor circuit: Using the differential input and output characteristics of UA741CP, a differential amplification and subtractor circuit can be implemented. By configuring appropriate resistors and capacitors, the two input signals can be differentially amplified or subtracted to extract Useful differential signals or eliminate common mode noise.

•Impedance matching and buffering: UA741CP can be used for impedance matching and buffering input/output impedance. By selecting appropriate resistive and capacitive components, signal transmission performance can be improved and signal reflections and distortions reduced.

Ⅴ.Environmental and export classification of UA741CP

•RoHS status:complies with ROHS3 specifications
•Moisture Sensitivity Level (MSL):1 (unlimited)
•REACH status:non-REACH product
•Radiation Hardening:No
•Substances reaching SVHC:No substances of SVHC

Ⅵ.Absolute Maximum Ratings of UA741CP
over virtual junction temperature range(unless otherwise noted)

1.Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute -maximum-rated conditions for extended periods may affect device reliability.
2.Differential voltages are at IN+ with respect to IN–.
3.All voltage values, unless otherwise noted, are with respect to the midpoint between Vcc+ and Vcc–.
4.The output may be shorted to ground or either power supply.
5.The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15V, whichever is less.

Ⅶ.Working power supply range of UA741CP

•Operating power supply range:±5V to ±22V
•Works with dual power supply:positive power supply voltage is +5V to +22V; negative power supply voltage is -5V to -22V
•Works with single power supply:+10V to +44V

Frequently Asked Questions

1.Can the gain of the UA741CP operational amplifier be adjusted?
UA741CP is a fixed-gain operational amplifier. Its gain is determined by the internal circuit. Users generally cannot directly adjust its gain. The typical gain of UA741CP is about 100dB.

2.Under what circumstances is UA741CP more suitable for amplifiers?
Basic amplification applications, low power supply voltage requirements, low frequency applications, special application scenarios, teaching and learning, etc.

3.What is the general advice for selecting a power supply voltage for UA741CP?
When selecting a power supply for UA741CP, ensure it falls within the specified voltage range to guarantee proper functionality and performance.

4.How many pins does UA741CP typically have, and what are some of the key pins?
UA741CP typically has 8 pins. Key pins include the inverting input, non-inverting input, output, and power supply pins.