CA3140 Op-Amp: Circuit, Pinout and Datasheet (2024)

The CA3140 is integrated circuit operationamplifier combining the advantages of high voltagePMOS transistor with high voltage bipolar transistorsingle chip.CA3140 BiMOS operational amplifierMOSFET (PMOS) transistor with gate protectionThe input circuit provides very high input impedance, very lowInput current and high-speed performance. CA3140 operates with a supply voltage of 4V to 36V(single power supply or dual power supply). These op ampsInternal phase compensation for stabilityThe unity gain follows the operation in operation, in addition,access terminal with auxiliary external capacitor Ifadditional frequency roll-off is required. terminal tooprovided for applications that require input offset voltageZero. The use of PMOS field effect tube at the input endphase causes the common mode input voltage capability to drop0.5V below the negative power supply terminal, an important

The properties of a single power supply application. Output stage usesbipolar transistors and includes built-in protectionprevent damage caused by short-circuit of load terminals to either endpower rail or ground.CA3140 for power supply operationThe voltage is up to 36V (±18V).

Symbol

Footprint

3D Model

• MOSFET input stage

-Very high input impedance (ZIN) -1.5TΩ (typical value)

-Very low input current (Il) -10pA (typical value), ±15V

-Wide common mode input voltage range (VlCR)-Can be swung 0.5V below the negative supply voltage rail

-Output swing supplements input common mode range

• Replace the industry type 741 directly in most applications

• Pb-free plus anneal available (compliant with RoHS)

Specifications

In this circuit, low current provides potential as input power, load resistance RL. When the load current is monitored by the power meter M, the load current increases by the multiplication factor R2/R1. Value, if the load current is 100nA, the supply load current 100μA will be submitted, and simpler current measurement uses many low-cost meters.

Remember that the input and output voltage are transferred at the same potential and the output current is amplified by the scale factor. The dotted line component decoupling capacitor FTO prevents potenTIoal oscillations in high output load capacitors. The problem is that the required high-frequency feedback is provided by capacitors to provide load decoupling and dotted series resistors.

CA3140 is a single package Op-Amp that has been widely used by engineers and students for quite a long time now. This Op-Amp can be used for many general purpose applications like voltage follower, buffers, comparators, amplifiers, adders and much more. So if you looking for a plain old Op-Amp just for some basic circuit design then this IC might be the right choice for you.

CA3140 is very similar to the CA3240 Op Amp. The main difference is that CA3240 has two Op-Amps inside package making to more cost-effective and compact.

One notable unique feature of the CA3140 Op-Amp is that it has two Offset Null pins (pin1 and pin 5). These two pins can be used to correct the offset error of an Op-Amp. That is when the voltage difference between the inverting and no-inverting pins is zero the output voltage of the Op-Amp should also be zero. If not then it is considered as offset error and it can be brought to zero again by providing an offset voltage through the offset pins that would nullify the error.

A test circuit of the CA3140 is given below.

• Single-supply amplifier with reference to ground in automotive and portable meters

• Sample and hold amplifier

• Long time timer/multivibrator (Microsecond-minute-hour)

• Photocurrent meter

• Peak detector

• Active filter

• Comparators

• Interfaces in 5V TTL systems and other low supply voltage system

• All standard operational amplifier applications

• Function generator

• Tone control

• power supply

• Portable instrument

• Intrusion alarm system

Intersil is an American semiconductor company headquartered in Milpitas, California. As of February 24, 2017, Intersil is a subsidiary of Renesas. The predecessor Intersil was established in August 1999 through the acquisition of the semiconductor business of Harris Corporation. Intersil is a power management IC business, with expertise in power management and precision simulation technology applicable to industrial, infrastructure, mobile, automotive and aerospace applications.

Datasheet PDF