LM13700N/NOPB

The LM13700N/NOPB is a dual operational transconductance amplifier (OTA) that combines two low-power monolithic CMOS OTAs on a single monolithic integrated circuit. This component is ideal for an array of linear and amplification applications, including instrumentation and buffering amplifiers. The LM13700N/NOPB is designed to operate in both single-supply and dual-supply voltage ranges and offers a high gain and low power consumption of typically 2.5 mA. The input and output interfaces are compatible with various logic families, while separate inputs provide input offset control and brightness control when connected together.

Application field

The LM13700N/NOPB has a wide range of applications in fields such as audio, instrumentation and video. The amplifier can be used as a voltage follower, an operational amplifier, or for signal conditioning or buffering. It can also be used for audio mixing, recording, mixing effects and sound mixing. In instrumentation applications, the LM13700N/NOPB can be used for gain control, sample and hold, analog-to-digital converters, vibration, and accelerometer sensors. Furthermore, it can also be used for video processing, such as filter processing and signal conditioning. Finally, it is suitable for antenna tuning, attenuator control, audio power amplifiers and buffer amplifiers.

Working Principle

The LM13700N/NOPB is a dual channel seamless amplification with an open-loop configuration. It comprises two stage-matched N-type and P-type OTAs, each consisting of an input source follower and an output load. Signal flow is configured in the form of a series-shunt feedback, forming the basic differential transconductance amplification. The series-shunt feedback has the same gain at all frequencies, making this circuitry suitable for applications that require flat or wide-frequency response.

The LM13700N/NOPB features a high open-loop gain, meaning that it can transfer a large signal from its input to its output without distortion. The amplifier has high input impedance, enabling it to drive high-capacitance loads without additional buffering circuits. Furthermore, its high gain-bandwidth product indicates a high gain over a wide frequency range. Additionally, its low input offset voltage simplifies external correction loops for instrumentation and automotive applications.

The LM13700N/NOPB is designed with several protection features, such as an input protection diode, an output short-circuit protection, and various current limits and protection modes. These features make the amplifier suitable for harsh environments and applications, such as automotive and industrial applications. Furthermore, the amplifier features low on-resistance which eliminates power dissipation by the loads, and a tightly matched differential pair with a low lower gain-bandwidth product for high accuracy.

In summary, the LM13700N/NOPB is an ideal amplifier for a range of instrumentation, buffer and audio applications. Its high open-loop gain, low input offset, low power consumption and protection features make it suitable for a wide range of environments including harsh conditions such as high-temperature and low-voltage applications.